diff --git a/CMakeLists.txt b/CMakeLists.txt
index 30b9be0..4e9afdc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,19 @@
  # along with this program. If not, see <http://www.gnu.org/licenses/>.
  #
 
- cmake_minimum_required(VERSION 3.13)
+ cmake_minimum_required(VERSION 3.16)
+
+if(ESP_PLATFORM)
+set(EXTRA_COMPONENT_DIRS src)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+set(USB_ITF_CCID 1)
+#set(USB_ITF_HID 1)
+set(USB_VID 0x20a0)
+set(USB_PID 0x4230)
+set(DEBUG_APDU 1)
+include(pico_keys_sdk_import.cmake)
+project(pico_keys_sdk)
+else()
 
  if(ENABLE_EMULATION)
  else()
@@ -28,7 +40,7 @@
  set(CMAKE_CXX_STANDARD 17)
 
  if(ENABLE_EMULATION)
- else()
+  else()
  pico_sdk_init()
  endif()
 
@@ -70,3 +82,4 @@ pico_add_extra_outputs(pico_keys_sdk_exe)
 target_link_libraries(pico_keys_sdk_exe PRIVATE pico_keys_sdk pico_stdlib pico_multicore hardware_flash hardware_sync hardware_adc pico_unique_id hardware_rtc tinyusb_device tinyusb_board)
 endif()
 
+endif()
diff --git a/partitions.csv b/partitions.csv
new file mode 100755
index 0000000..89fe79f
--- /dev/null
+++ b/partitions.csv
@@ -0,0 +1,7 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+# Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
+
+nvs,      data, nvs,     0x9000,  0x6000
+phy_init, data, phy,     0xf000,  0x1000
+factory,  app,  factory,   0x10000, 1M,
+part0,    0x40, 0x1,     0x200000,  1M,
diff --git a/pico_keys_sdk_import.cmake b/pico_keys_sdk_import.cmake
index 7a1964e..06f7a55 100644
--- a/pico_keys_sdk_import.cmake
+++ b/pico_keys_sdk_import.cmake
@@ -51,6 +51,15 @@ elseif (VIDPID STREQUAL "GnuPG")
      set(USB_PID 0x2440)
 endif()
 
+if(ESP_PLATFORM)
+    if (DEFINED CONFIG_TINYUSB_DESC_CUSTOM_VID)
+        set(USB_VID CONFIG_TINYUSB_DESC_CUSTOM_VID)
+    endif()
+    if(DEFINED CONFIG_TINYUSB_DESC_CUSTOM_PID)
+        set(USB_PID CONFIG_TINYUSB_DESC_CUSTOM_PID)
+    endif()
+endif()
+
 if (NOT DEFINED USB_VID)
     set(USB_VID 0xFEFF)
 endif()
@@ -82,13 +91,21 @@ endif(USB_ITF_HID)
 if(USB_ITF_CCID)
     add_definitions(-DUSB_ITF_CCID=1)
     message(STATUS "USB CCID Interface:\t\t enabled")
+    if(USB_ITF_WCID)
+        add_definitions(-DUSB_ITF_WCID=1)
+        message(STATUS "USB WebCCID Interface:\t enabled")
+    endif(USB_ITF_WCID)
 endif(USB_ITF_CCID)
 add_definitions(-DDEBUG_APDU=${DEBUG_APDU})
-add_definitions(-DMBEDTLS_CONFIG_FILE="${CMAKE_CURRENT_LIST_DIR}/config/mbedtls_config.h")
+if (NOT ESP_PLATFORM)
+    add_definitions(-DMBEDTLS_CONFIG_FILE="${CMAKE_CURRENT_LIST_DIR}/config/mbedtls_config.h")
+else()
+    add_definitions(-DCFG_TUSB_CONFIG_FILE="${CMAKE_CURRENT_LIST_DIR}/src/usb/tusb_config.h")
+endif()
 
 message(STATUS "USB VID/PID: ${USB_VID}:${USB_PID}")
 
-set(EXTERNAL_SOURCES
+set(MBEDTLS_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/aes.c
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/asn1parse.c
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/asn1write.c
@@ -159,7 +176,15 @@ set(INCLUDES ${INCLUDES}
 )
 
 if(USB_ITF_HID OR ENABLE_EMULATION)
-    set(EXTERNAL_SOURCES ${EXTERNAL_SOURCES}
+    set(MBEDTLS_SOURCES ${MBEDTLS_SOURCES}
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509write_crt.c
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509_create.c
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509write_csr.c
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pk.c
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pk_wrap.c
+        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pkwrite.c
+    )
+    set(CBOR_SOURCES
         ${CMAKE_CURRENT_LIST_DIR}/tinycbor/src/cborencoder.c
         ${CMAKE_CURRENT_LIST_DIR}/tinycbor/src/cborparser.c
         ${CMAKE_CURRENT_LIST_DIR}/tinycbor/src/cborparser_dup_string.c
@@ -212,7 +237,7 @@ if (ENABLE_EMULATION)
     set(SOURCES ${SOURCES}
         ${CMAKE_CURRENT_LIST_DIR}/src/usb/emulation/emulation.c
     )
-    set(EXTERNAL_SOURCES ${EXTERNAL_SOURCES}
+    set(MBEDTLS_SOURCES ${MBEDTLS_SOURCES}
         ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/ctr_drbg.c
         ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/entropy.c
         ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/entropy_poll.c
@@ -238,6 +263,10 @@ else()
         ${CMAKE_CURRENT_LIST_DIR}/src/usb/usb_descriptors.c
     )
 endif()
+set(EXTERNAL_SOURCES ${CBOR_SOURCES})
+if(NOT ESP_PLATFORM)
+    set(EXTERNAL_SOURCES ${EXTERNAL_SOURCES} ${MBEDTLS_SOURCES})
+endif()
 if (MSVC)
     target_compile_options(pico_hsm PUBLIC
         -wd4820
@@ -263,13 +292,14 @@ if (MSVC)
         COMPILE_FLAGS " -W3 -wd4242 -wd4065"
     )
 endif()
+set(INTERNAL_SOURCES ${SOURCES})
+set(SOURCES ${SOURCES} ${EXTERNAL_SOURCES})
 if (NOT TARGET pico_keys_sdk)
-    if (ENABLE_EMULATION)
+    if (ENABLE_EMULATION OR ESP_PLATFORM)
         add_impl_library(pico_keys_sdk)
     else()
         pico_add_library(pico_keys_sdk)
     endif()
-    set(SOURCES ${SOURCES} ${EXTERNAL_SOURCES})
     target_sources(pico_keys_sdk INTERFACE
         ${SOURCES}
     )
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
new file mode 100755
index 0000000..3c810cc
--- /dev/null
+++ b/sdkconfig.defaults
@@ -0,0 +1,13 @@
+# This file was generated using idf.py save-defconfig. It can be edited manually.
+# Espressif IoT Development Framework (ESP-IDF) Project Minimal Configuration
+#
+IGNORE_UNKNOWN_FILES_FOR_MANAGED_COMPONENTS=1
+
+CONFIG_TINYUSB=y
+
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_WL_SECTOR_SIZE_512=y
+CONFIG_WL_SECTOR_MODE_PERF=y
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100755
index 0000000..6d96dd5
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,5 @@
+idf_component_register(
+    SRCS ${INTERNAL_SOURCES}
+    INCLUDE_DIRS . fs rng usb ../mbedtls/include
+    REQUIRES bootloader_support esp_partition esp_tinyusb efuse
+)
diff --git a/src/apdu.c b/src/apdu.c
index bc997c0..61e96e8 100644
--- a/src/apdu.c
+++ b/src/apdu.c
@@ -19,6 +19,9 @@
 #include "pico_keys.h"
 #include "usb.h"
 #include <stdio.h>
+#ifdef ESP_PLATFORM
+#include "esp_compat.h"
+#endif
 
 uint8_t *rdata_gr = NULL;
 uint16_t rdata_bk = 0x0;
@@ -196,7 +199,9 @@ void apdu_thread() {
     card_init_core1();
     while (1) {
         uint32_t m = 0;
+#ifndef ENABLE_EMULATION
         queue_remove_blocking(&usb_to_card_q, &m);
+#endif
 
         if (m == EV_VERIFY_CMD_AVAILABLE || m == EV_MODIFY_CMD_AVAILABLE) {
             set_res_sw(0x6f, 0x00);
@@ -213,13 +218,21 @@ done:   ;
 
         finished_data_size = apdu_next();
         uint32_t flag = EV_EXEC_FINISHED;
+#ifndef ENABLE_EMULATION
         queue_add_blocking(&card_to_usb_q, &flag);
+#endif
+#ifdef ESP_PLATFORM
+        vTaskDelay(pdMS_TO_TICKS(10));
+#endif
     }
     //printf("EXIT !!!!!!\n");
     if (current_app && current_app->unload) {
         current_app->unload();
         current_app = NULL;
     }
+#ifdef ESP_PLATFORM
+    vTaskDelete(NULL);
+#endif
 }
 #endif
 
diff --git a/src/apdu.h b/src/apdu.h
index 05d508a..e30e12b 100644
--- a/src/apdu.h
+++ b/src/apdu.h
@@ -19,7 +19,7 @@
 #define _APDU_H_
 
 #include <stdlib.h>
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #endif
 #include "compat.h"
diff --git a/src/asn1.h b/src/asn1.h
index 3d4c5e1..ae2e471 100644
--- a/src/asn1.h
+++ b/src/asn1.h
@@ -19,7 +19,7 @@
 #define _ASN1_H_
 
 #include <stdlib.h>
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #else
 #include <stdint.h>
diff --git a/src/crypto_utils.c b/src/crypto_utils.c
index 76a0c16..f98d7ef 100644
--- a/src/crypto_utils.c
+++ b/src/crypto_utils.c
@@ -15,7 +15,10 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION)
+#elif defined(ESP_PLATFORM)
+#include "esp_compat.h"
+#else
 #include <pico/unique_id.h>
 #endif
 #include "mbedtls/md.h"
diff --git a/src/crypto_utils.h b/src/crypto_utils.h
index 2a8d99b..9c729d5 100644
--- a/src/crypto_utils.h
+++ b/src/crypto_utils.h
@@ -18,10 +18,6 @@
 #ifndef _CRYPTO_UTILS_H_
 #define _CRYPTO_UTILS_H_
 
-#include "stdlib.h"
-#ifndef ENABLE_EMULATION
-#include "pico/stdlib.h"
-#endif
 #include "mbedtls/ecp.h"
 #include "mbedtls/md.h"
 
diff --git a/src/eac.c b/src/eac.c
index 77181da..7fef272 100644
--- a/src/eac.c
+++ b/src/eac.c
@@ -103,10 +103,8 @@ int sm_unwrap() {
     if (r != CCID_OK) {
         return r;
     }
-    uint16_t le = sm_get_le();
-    if (le >= 0) {
-        apdu.ne = le;
-    }
+    apdu.ne = sm_get_le();
+
     uint8_t *body = NULL;
     uint16_t body_size = 0;
     bool is87 = false;
@@ -306,12 +304,12 @@ int sm_verify() {
 }
 
 uint16_t sm_remove_padding(const uint8_t *data, uint16_t data_len) {
-    uint16_t i = data_len - 1;
+    int32_t i = data_len - 1;
     for (; i >= 0 && data[i] == 0; i--) {
         ;
     }
     if (i < 0 || data[i] != 0x80) {
         return 0;
     }
-    return i;
+    return (uint16_t)i;
 }
diff --git a/src/eac.h b/src/eac.h
index 6343906..f178a01 100644
--- a/src/eac.h
+++ b/src/eac.h
@@ -18,10 +18,6 @@
 #ifndef _EAC_H_
 #define _EAC_H_
 
-#include <stdlib.h>
-#ifndef ENABLE_EMULATION
-#include "pico/stdlib.h"
-#endif
 #include "pico_keys.h"
 
 typedef enum MSE_protocol {
diff --git a/src/esp_compat.h b/src/esp_compat.h
new file mode 100644
index 0000000..cfc0d9b
--- /dev/null
+++ b/src/esp_compat.h
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ESP_COMPAT_H_
+#define __ESP_COMPAT_H_
+
+#ifdef ESP_PLATFORM
+
+#include "freertos/freertos.h"
+#include "freertos/queue.h"
+typedef QueueHandle_t queue_t;
+#define queue_init(a,b,c) do { *(a) = xQueueCreate(c, b); } while(0)
+#define queue_add_blocking(a,b) xQueueSend(*(a), b, portMAX_DELAY)
+#define queue_remove_blocking(a,b) xQueueReceive(*(a), b, portMAX_DELAY)
+#define queue_try_add(a,b) xQueueSend(*(a), b, 0)
+#define queue_is_empty(a) (uxQueueMessagesWaiting(*(a)) == 0)
+#define queue_try_remove(a,b) xQueueReceive(*(a), b, 0)
+extern TaskHandle_t hcore0, hcore1;
+#define multicore_launch_core1(a) xTaskCreate((void(*)(void *))a, "core1", 4096, NULL, CONFIG_TINYUSB_TASK_PRIORITY + 2, &hcore1)
+#define multicore_reset_core1() do { if (hcore1) { eTaskState e = eTaskGetState(hcore1); if (e == eRunning) { vTaskDelete(hcore1); }} }while(0)
+#define sleep_ms(a) vTaskDelay(a / portTICK_PERIOD_MS)
+static inline uint32_t board_millis(void) {
+    return ( ( ((uint64_t) xTaskGetTickCount()) * 1000) / configTICK_RATE_HZ );
+}
+typedef SemaphoreHandle_t mutex_t;
+typedef SemaphoreHandle_t semaphore_t;
+#define mutex_init(a) do { *(a) = xSemaphoreCreateMutex();} while(0)
+#define mutex_try_enter(a,b) xSemaphoreTake(*(a), 0)
+#define mutex_enter_blocking(a) xSemaphoreTake(*(a), portMAX_DELAY)
+#define mutex_exit(a) xSemaphoreGive(*(a))
+#define sem_init(a,b,c) do { *(a) = xSemaphoreCreateCounting(c, b); } while(0)
+#define sem_release(a) xSemaphoreGive(*(a))
+#define sem_acquire_blocking(a) xSemaphoreTake(*(a), portMAX_DELAY)
+#define multicore_lockout_victim_init() (void)0
+static inline bool multicore_lockout_start_timeout_us(int a) {
+    vTaskSuspend(hcore1); return true; }
+static inline bool multicore_lockout_end_timeout_us(int a) {
+    vTaskResume(hcore1); return true; }
+
+#endif
+
+#endif
diff --git a/src/fs/file.h b/src/fs/file.h
index fd04a40..fed98bc 100644
--- a/src/fs/file.h
+++ b/src/fs/file.h
@@ -20,7 +20,7 @@
 #define _FILE_H_
 
 #include <stdlib.h>
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #else
 #include <stdbool.h>
diff --git a/src/fs/flash.c b/src/fs/flash.c
index f8e16bc..75527c2 100644
--- a/src/fs/flash.c
+++ b/src/fs/flash.c
@@ -19,14 +19,18 @@
 #include <stdint.h>
 #include <string.h>
 
-#ifndef ENABLE_EMULATION
-#include "pico/stdlib.h"
-#include "hardware/flash.h"
-#else
+#if defined(ENABLE_EMULATION) || defined(ESP_PLATFORM)
 #define XIP_BASE                0
 #define FLASH_SECTOR_SIZE       4096
+#ifdef ESP_PLATFORM
+#define PICO_FLASH_SIZE_BYTES   (1 * 1024 * 1024)
+#else
 #define PICO_FLASH_SIZE_BYTES   (8 * 1024 * 1024)
 #endif
+#else
+#include "pico/stdlib.h"
+#include "hardware/flash.h"
+#endif
 #include "pico_keys.h"
 #include "file.h"
 #include <stdio.h>
@@ -38,7 +42,11 @@
  * |                                                    |
  * ------------------------------------------------------
  */
+#ifdef ESP_PLATFORM
+#define FLASH_TARGET_OFFSET 0
+#else
 #define FLASH_TARGET_OFFSET (PICO_FLASH_SIZE_BYTES >> 1) // DATA starts at the mid of flash
+#endif
 #define FLASH_DATA_HEADER_SIZE (sizeof(uintptr_t) + sizeof(uint32_t))
 #define FLASH_PERMANENT_REGION (4 * FLASH_SECTOR_SIZE) // 4 sectors (16kb) of permanent memory
 
diff --git a/src/fs/low_flash.c b/src/fs/low_flash.c
index bb2cf5c..791e3f7 100644
--- a/src/fs/low_flash.c
+++ b/src/fs/low_flash.c
@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #include "hardware/flash.h"
 #include "hardware/sync.h"
@@ -38,15 +38,26 @@
 #define lseek _lseek
 #include "mman.h"
 #else
+#ifdef ESP_PLATFORM
+#include "esp_compat.h"
+#include "esp_partition.h"
+const esp_partition_t *part0;
+#define save_and_disable_interrupts() 1
+#define flash_range_erase(a,b) esp_partition_erase_range(part0, a, b)
+#define flash_range_program(a,b,c) esp_partition_write(part0, a, b, c);
+#define restore_interrupts(a) (void)a
+#else
 #include <unistd.h>
 #include <sys/mman.h>
 #endif
 #include <fcntl.h>
 #define FLASH_SECTOR_SIZE       4096
 #define PICO_FLASH_SIZE_BYTES   (8 * 1024 * 1024)
+#define XIP_BASE 0
 int fd_map = 0;
 uint8_t *map = NULL;
 #endif
+#endif
 #include "pico_keys.h"
 #include <string.h>
 
@@ -87,15 +98,15 @@ void do_flash() {
     if (mutex_try_enter(&mtx_flash, NULL) == true) {
 #endif
     if (locked_out == true && flash_available == true && ready_pages > 0) {
-        //printf(" DO_FLASH AVAILABLE\r\n");
+        //printf(" DO_FLASH AVAILABLE\n");
         for (int r = 0; r < TOTAL_FLASH_PAGES; r++) {
             if (flash_pages[r].ready == true) {
 #ifndef ENABLE_EMULATION
-                //printf("WRITTING %X\r\n",flash_pages[r].address-XIP_BASE);
+                //printf("WRITTING %X\n",flash_pages[r].address-XIP_BASE);
                 while (multicore_lockout_start_timeout_us(1000) == false) {
                     ;
                 }
-                //printf("WRITTING %X\r\n",flash_pages[r].address-XIP_BASE);
+                //printf("WRITTING %X\n",flash_pages[r].address-XIP_BASE);
                 uint32_t ints = save_and_disable_interrupts();
                 flash_range_erase(flash_pages[r].address - XIP_BASE, FLASH_SECTOR_SIZE);
                 flash_range_program(flash_pages[r].address - XIP_BASE,
@@ -105,7 +116,7 @@ void do_flash() {
                 while (multicore_lockout_end_timeout_us(1000) == false) {
                     ;
                 }
-                //printf("WRITEN %X !\r\n",flash_pages[r].address);
+                //printf("WRITEN %X !\n",flash_pages[r].address);
 #else
                 memcpy(map + flash_pages[r].address, flash_pages[r].page, FLASH_SECTOR_SIZE);
 #endif
@@ -117,7 +128,7 @@ void do_flash() {
                 while (multicore_lockout_start_timeout_us(1000) == false) {
                     ;
                 }
-                //printf("WRITTING\r\n");
+                //printf("WRITTING\n");
                 flash_range_erase(flash_pages[r].address - XIP_BASE,
                                   flash_pages[r].page_size ? ((int) (flash_pages[r].page_size /
                                                                      FLASH_SECTOR_SIZE)) *
@@ -140,6 +151,10 @@ void do_flash() {
         }
     }
     flash_available = false;
+#ifdef ESP_PLATFORM
+    esp_partition_munmap(fd_map);
+    esp_partition_mmap(part0, 0, part0->size, ESP_PARTITION_MMAP_DATA, (const void **)&map, (esp_partition_mmap_handle_t *)&fd_map);
+#endif
 #ifndef ENABLE_EMULATION
     mutex_exit(&mtx_flash);
 }
@@ -150,14 +165,18 @@ sem_release(&sem_wait);
 //this function has to be called from the core 0
 void low_flash_init() {
     memset(flash_pages, 0, sizeof(page_flash_t) * TOTAL_FLASH_PAGES);
-#ifndef ENABLE_EMULATION
-    mutex_init(&mtx_flash);
-    sem_init(&sem_wait, 0, 1);
-#else
+#if defined(ENABLE_EMULATION)
     fd_map = open("memory.flash", O_RDWR | O_CREAT, (mode_t) 0600);
     lseek(fd_map, PICO_FLASH_SIZE_BYTES - 1, SEEK_SET);
     write(fd_map, "", 1);
     map = mmap(0, PICO_FLASH_SIZE_BYTES, PROT_READ | PROT_WRITE, MAP_SHARED, fd_map, 0);
+#else
+    mutex_init(&mtx_flash);
+    sem_init(&sem_wait, 0, 1);
+#if defined(ESP_PLATFORM)
+    part0 = esp_partition_find_first(0x40, 0x1, "part0");
+    esp_partition_mmap(part0, 0, part0->size, ESP_PARTITION_MMAP_DATA, (const void **)&map, (esp_partition_mmap_handle_t *)&fd_map);
+#endif
 #endif
 }
 
@@ -198,12 +217,12 @@ page_flash_t *find_free_page(uintptr_t addr) {
             flash_pages[r].address == addr_alg) {                                                   //first available
             p = &flash_pages[r];
             if (!flash_pages[r].ready && !flash_pages[r].erase) {
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
                 memcpy(p->page, (uint8_t *) addr_alg, FLASH_SECTOR_SIZE);
 #else
                 memcpy(p->page,
                        (addr >= start_data_pool &&
-                        addr <= end_rom_pool) ? (uint8_t *) (map + addr_alg) : (uint8_t *) addr_alg,
+                        addr <= end_rom_pool + sizeof(uintptr_t)) ? (uint8_t *) (map + addr_alg) : (uint8_t *) addr_alg,
                        FLASH_SECTOR_SIZE);
 #endif
                 ready_pages++;
@@ -230,18 +249,18 @@ int flash_program_block(uintptr_t addr, const uint8_t *data, size_t len) {
 #ifndef ENABLE_EMULATION
         mutex_exit(&mtx_flash);
 #endif
-        printf("ERROR: ALL FLASH PAGES CACHED\r\n");
+        printf("ERROR: ALL FLASH PAGES CACHED\n");
         return CCID_ERR_NO_MEMORY;
     }
     if (!(p = find_free_page(addr))) {
 #ifndef ENABLE_EMULATION
         mutex_exit(&mtx_flash);
 #endif
-        printf("ERROR: FLASH CANNOT FIND A PAGE (rare error)\r\n");
+        printf("ERROR: FLASH CANNOT FIND A PAGE (rare error)\n");
         return CCID_ERR_MEMORY_FATAL;
     }
     memcpy(&p->page[addr & (FLASH_SECTOR_SIZE - 1)], data, len);
-    //printf("Flash: modified page %X with data %x at [%x] (top page %X)\r\n",addr_alg,data,addr&(FLASH_SECTOR_SIZE-1),addr);
+    //printf("Flash: modified page %X with data %x at [%x]\n",(uintptr_t)addr,(uintptr_t)data,addr&(FLASH_SECTOR_SIZE-1));
 #ifndef ENABLE_EMULATION
     mutex_exit(&mtx_flash);
 #endif
@@ -279,8 +298,9 @@ uint8_t *flash_read(uintptr_t addr) {
     uint8_t *v = (uint8_t *) addr;
 #ifndef ENABLE_EMULATION
     mutex_exit(&mtx_flash);
-#else
-    if (addr >= start_data_pool && addr <= end_rom_pool) {
+#endif
+#if defined(ENABLE_EMULATION) || defined(ESP_PLATFORM)
+    if (addr >= start_data_pool && addr <= end_rom_pool + sizeof(uintptr_t)) {
         v += (uintptr_t) map;
     }
 #endif
@@ -317,11 +337,11 @@ int flash_erase_page(uintptr_t addr, size_t page_size) {
 #ifndef ENABLE_EMULATION
         mutex_exit(&mtx_flash);
 #endif
-        printf("ERROR: ALL FLASH PAGES CACHED\r\n");
+        printf("ERROR: ALL FLASH PAGES CACHED\n");
         return CCID_ERR_NO_MEMORY;
     }
     if (!(p = find_free_page(addr))) {
-        printf("ERROR: FLASH CANNOT FIND A PAGE (rare error)\r\n");
+        printf("ERROR: FLASH CANNOT FIND A PAGE (rare error)\n");
 #ifndef ENABLE_EMULATION
         mutex_exit(&mtx_flash);
 #endif
diff --git a/src/idf_component.yml b/src/idf_component.yml
new file mode 100755
index 0000000..81670f8
--- /dev/null
+++ b/src/idf_component.yml
@@ -0,0 +1,5 @@
+## IDF Component Manager Manifest File
+dependencies:
+  espressif/esp_tinyusb: "^1.4.4"
+  #espressif/tinyusb: "^0.15.0"
+  zorxx/neopixel: "^1.0.4"
diff --git a/src/main.c b/src/main.c
index c3f1913..990d55d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,33 +16,19 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 
 // Pico
-#ifndef ENABLE_EMULATION
-#include "pico/stdlib.h"
-#else
+
+#if defined(ENABLE_EMULATION)
 #if !defined(_MSC_VER)
 #include <sys/time.h>
 #endif
 #include "emulation.h"
-#endif
-
-// For memcpy
-#include <string.h>
-
-#ifndef ENABLE_EMULATION
-// Include descriptor struct definitions
-//#include "usb_common.h"
-// USB register definitions from pico-sdk
-#include "hardware/regs/usb.h"
-// USB hardware struct definitions from pico-sdk
-#include "hardware/structs/usb.h"
-// For interrupt enable and numbers
-#include "hardware/irq.h"
-// For resetting the USB controller
-#include "hardware/resets.h"
-
-#include "pico/multicore.h"
+#elif defined(ESP_PLATFORM)
+#include "tusb.h"
+#else
+#include "pico/stdlib.h"
 #endif
 
 #include "random.h"
@@ -99,11 +85,14 @@ static inline void ws2812_program_init(PIO pio,
 }
 #endif
 
-#ifndef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION)
+#else
 #include "usb.h"
+#ifndef ESP_PLATFORM
 #include "hardware/rtc.h"
 #include "bsp/board.h"
 #endif
+#endif
 
 extern void do_flash();
 extern void low_flash_init();
@@ -194,6 +183,11 @@ uint32_t board_millis() {
 }
 
 #else
+#ifdef ESP_PLATFORM
+bool board_button_read() {
+    return true;
+}
+#endif
 bool button_pressed_state = false;
 uint32_t button_pressed_time = 0;
 uint8_t button_press = 0;
@@ -229,6 +223,22 @@ bool wait_button() {
 
 struct apdu apdu;
 
+#ifdef ESP_PLATFORM
+#include "driver/gpio.h"
+#include "neopixel.h"
+tNeopixelContext neopixel = NULL;
+tNeopixel pixel[] =
+   {
+       { 0, NP_RGB(0,  0,  0) }, /* off */
+       { 0, NP_RGB(255,  0, 255) }, /* magenta */
+       { 0, NP_RGB(255,  0, 0) }, /* green */
+       { 0, NP_RGB(0, 255,  0) }, /* red */
+       { 0, NP_RGB(0, 0,  255) }, /* red */
+       { 0, NP_RGB(255,  255, 0) }, /* yellow */
+       { 0, NP_RGB(0, 255,  255) }, /* cyan */
+       { 0, NP_RGB(255, 255,  255) }, /* white */
+   };
+#endif
 void led_blinking_task() {
     static uint32_t start_ms = 0;
     static uint8_t led_state = false;
@@ -261,6 +271,8 @@ void led_blinking_task() {
     }
 #elif defined(CYW43_WL_GPIO_LED_PIN)
     cyw43_arch_gpio_put(led_color, led_state);
+#elif ESP_PLATFORM
+    neopixel_SetPixel(neopixel, &pixel[led_state], 1);
 #endif
     led_state ^= 1; // toggle
 }
@@ -287,7 +299,9 @@ void led_off_all() {
 }
 
 void init_rtc() {
-#ifndef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION)
+#elif defined(ESP_PLATFORM)
+#else
     rtc_init();
     datetime_t dt = {
         .year  = 2020,
@@ -304,64 +318,16 @@ void init_rtc() {
 
 extern void neug_task();
 extern void usb_task();
-
-void execute_tasks() {
+void execute_tasks()
+{
     usb_task();
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
     tud_task(); // tinyusb device task
 #endif
     led_blinking_task();
 }
 
-char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
-pico_unique_board_id_t pico_serial;
-#ifdef ENABLE_EMULATION
-#define pico_get_unique_board_id(a) memset(a, 0, sizeof(*(a)))
-#endif
-
-int main(void) {
-	pico_get_unique_board_id(&pico_serial);
-    memset(pico_serial_str, 0, sizeof(pico_serial_str));
-    for (int i = 0; i < sizeof(pico_serial); i++) {
-        snprintf(&pico_serial_str[2 * i], 3, "%02X", pico_serial.id[i]);
-    }
-#ifndef ENABLE_EMULATION
-    usb_init();
-
-    board_init();
-    stdio_init_all();
-
-#ifdef PIMORONI_TINY2040
-    gpio_init(TINY2040_LED_R_PIN);
-    gpio_set_dir(TINY2040_LED_R_PIN, GPIO_OUT);
-    gpio_init(TINY2040_LED_G_PIN);
-    gpio_set_dir(TINY2040_LED_G_PIN, GPIO_OUT);
-    gpio_init(TINY2040_LED_B_PIN);
-    gpio_set_dir(TINY2040_LED_B_PIN, GPIO_OUT);
-#elif defined(PICO_DEFAULT_LED_PIN)
-    gpio_init(PICO_DEFAULT_LED_PIN);
-    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
-#elif defined(CYW43_WL_GPIO_LED_PIN)
-    cyw43_arch_init();
-#endif
-
-    led_off_all();
-
-    tusb_init();
-
-    //prepare_ccid();
-#else
-    emul_init("127.0.0.1", 35963);
-#endif
-
-    random_init();
-
-    low_flash_init();
-
-    init_rtc();
-
-    //ccid_prepare_receive(&ccid);
-
+void core0_loop() {
     while (1) {
         execute_tasks();
         neug_task();
@@ -385,8 +351,90 @@ int main(void) {
                 button_pressed_time = button_press = 0;
             }
         }
+#endif
+#ifdef ESP_PLATFORM
+    vTaskDelay(pdMS_TO_TICKS(10));
 #endif
     }
+}
+
+char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
+pico_unique_board_id_t pico_serial;
+#ifdef ESP_PLATFORM
+#include "tinyusb.h"
+#include "esp_efuse.h"
+#define pico_get_unique_board_id(a) do { uint32_t value; esp_efuse_read_block(EFUSE_BLK1, &value, 0, 32); memcpy((uint8_t *)(a), &value, sizeof(uint32_t)); esp_efuse_read_block(EFUSE_BLK1, &value, 32, 32); memcpy((uint8_t *)(a)+4, &value, sizeof(uint32_t)); } while(0)
+extern const tinyusb_config_t tusb_cfg;
+TaskHandle_t hcore0 = NULL, hcore1 = NULL;
+int app_main() {
+#else
+#ifdef ENABLE_EMULATION
+#define pico_get_unique_board_id(a) memset(a, 0, sizeof(*(a)))
+#endif
+int main(void) {
+#endif
+    pico_get_unique_board_id(&pico_serial);
+    memset(pico_serial_str, 0, sizeof(pico_serial_str));
+    for (int i = 0; i < sizeof(pico_serial); i++) {
+        snprintf(&pico_serial_str[2 * i], 3, "%02X", pico_serial.id[i]);
+    }
+
+#ifndef ENABLE_EMULATION
+#ifndef ESP_PLATFORM
+    board_init();
+    stdio_init_all();
+#endif
+#ifdef PIMORONI_TINY2040
+    gpio_init(TINY2040_LED_R_PIN);
+    gpio_set_dir(TINY2040_LED_R_PIN, GPIO_OUT);
+    gpio_init(TINY2040_LED_G_PIN);
+    gpio_set_dir(TINY2040_LED_G_PIN, GPIO_OUT);
+    gpio_init(TINY2040_LED_B_PIN);
+    gpio_set_dir(TINY2040_LED_B_PIN, GPIO_OUT);
+#elif defined(PICO_DEFAULT_LED_PIN)
+    gpio_init(PICO_DEFAULT_LED_PIN);
+    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+#elif defined(CYW43_WL_GPIO_LED_PIN)
+    cyw43_arch_init();
+#endif
+
+    led_off_all();
+
+    //prepare_ccid();
+#else
+    emul_init("127.0.0.1", 35963);
+#endif
+
+    random_init();
+
+    low_flash_init();
+
+    scan_flash();
+
+    init_rtc();
+
+#ifndef ENABLE_EMULATION
+    usb_init();
+#ifdef ESP_PLATFORM
+    tusb_cfg.string_descriptor[3] = pico_serial_str;
+    tinyusb_driver_install(&tusb_cfg);
+#endif
+#endif
+
+    //ccid_prepare_receive(&ccid);
+#ifdef ESP_PLATFORM
+    uint8_t gpio = GPIO_NUM_48;
+    if (file_has_data(ef_phy)) {
+        gpio = file_get_data(ef_phy)[PHY_LED_GPIO];
+    }
+    neopixel = neopixel_Init(1, gpio);
+#endif
+
+#ifdef ESP_PLATFORM
+    xTaskCreate(core0_loop, "core0", 4096, NULL, CONFIG_TINYUSB_TASK_PRIORITY + 1, &hcore0);
+#else
+    core0_loop();
+#endif
 
     return 0;
 }
diff --git a/src/pico_keys.h b/src/pico_keys.h
index ffe3b8a..8f5675f 100644
--- a/src/pico_keys.h
+++ b/src/pico_keys.h
@@ -19,11 +19,11 @@
 #define _PICO_KEYS_H_
 
 #include "file.h"
-#ifndef ENABLE_EMULATION
-#include "pico/unique_id.h"
-#else
+#if defined(ENABLE_EMULATION) || defined(ESP_PLATFORM)
 #include <stdint.h>
+#ifdef ENABLE_EMULATION
 extern uint32_t board_millis();
+#endif
 #if !defined(MIN)
 #if defined(_MSC_VER)
 #define MIN(a,b) (((a)<(b))?(a):(b))
@@ -44,17 +44,27 @@ extern uint32_t board_millis();
        _a > _b ? _a : _b; })
 #endif
 #endif
+#else
+#include "pico/unique_id.h"
 #endif
 #include <string.h>
 
+#if defined(ENABLE_EMULATION)
+#include <stdbool.h>
+#elif defined(ESP_PLATFORM)
+#include "esp_compat.h"
+#else
+#include "pico/util/queue.h"
+#endif
+
 extern bool wait_button();
 
 extern void low_flash_init_core1();
 
-static inline const uint16_t make_uint16_t(uint8_t b1, uint8_t b2) {
+static inline uint16_t make_uint16_t(uint8_t b1, uint8_t b2) {
     return (b1 << 8) | b2;
 }
-static inline const uint16_t get_uint16_t(const uint8_t *b, uint16_t offset) {
+static inline uint16_t get_uint16_t(const uint8_t *b, uint16_t offset) {
     return make_uint16_t(b[offset], b[offset + 1]);
 }
 static inline void put_uint16_t(uint16_t n, uint8_t *b) {
@@ -155,12 +165,11 @@ extern uint32_t button_timeout;
 #define CCID_WRONG_PADDING                   -1011
 #define CCID_VERIFICATION_FAILED             -1012
 
-#if defined(ENABLE_EMULATION)
+#if defined(ENABLE_EMULATION) || defined(ESP_PLATFORM)
 #define PICO_UNIQUE_BOARD_ID_SIZE_BYTES 8
 typedef struct { uint8_t id[PICO_UNIQUE_BOARD_ID_SIZE_BYTES]; } pico_unique_board_id_t;
 #endif
-
 extern pico_unique_board_id_t pico_serial;
-extern char pico_serial_str[];
+extern char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
 
 #endif
diff --git a/src/rng/hwrng.c b/src/rng/hwrng.c
index 1f778c2..d57859f 100644
--- a/src/rng/hwrng.c
+++ b/src/rng/hwrng.c
@@ -18,7 +18,17 @@
 #include <stdint.h>
 #include <string.h>
 #include <stdio.h>
-#ifndef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION)
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+
+mbedtls_ctr_drbg_context ctr_drbg;
+extern uint32_t board_millis();
+#elif (ESP_PLATFORM)
+#include "bootloader_random.h"
+#include "esp_random.h"
+#include "esp_compat.h"
+#else
 #include "pico/stdlib.h"
 
 #include "hwrng.h"
@@ -28,16 +38,13 @@
 #include "bsp/board.h"
 
 #include "pico/time.h"
-#else
-#include "mbedtls/entropy.h"
-#include "mbedtls/ctr_drbg.h"
-
-mbedtls_ctr_drbg_context ctr_drbg;
-extern uint32_t board_millis();
 #endif
 
 void adc_start() {
-#ifndef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION)
+#elif defined(ESP_PLATFORM)
+    bootloader_random_enable();
+#else
     adc_init();
     adc_gpio_init(27);
     adc_select_input(1);
@@ -46,7 +53,7 @@ void adc_start() {
 
 void adc_stop() {
 }
-#ifdef ENABLE_EMULATION
+#if defined(ENABLE_EMULATION) || defined(ESP_PLATFORM)
 uint32_t adc_read() {
     return 0;
 }
@@ -76,7 +83,12 @@ static int ep_process() {
         ep_init();
     }
     uint64_t word = 0x0;
-#ifndef ENABLE_EMULATION
+
+#if defined(ENABLE_EMULATION)
+    mbedtls_ctr_drbg_random(&ctr_drbg, (uint8_t *) &word, sizeof(word));
+#elif defined(ESP_PLATFORM)
+    esp_fill_random((uint8_t *)&word, sizeof(word));
+#else
     for (int n = 0; n < 64; n++) {
         uint8_t bit1, bit2;
         do {
@@ -86,8 +98,6 @@ static int ep_process() {
         } while (bit1 == bit2);
         word = (word << 1) | bit1;
     }
-#else
-    mbedtls_ctr_drbg_random(&ctr_drbg, (uint8_t *) &word, sizeof(word));
 #endif
     random_word ^= word ^ board_millis() ^ adc_read();
     random_word *= 0x00000100000001B3;
@@ -200,7 +210,11 @@ uint32_t neug_get() {
 void neug_wait_full() {
     struct rng_rb *rb = &the_ring_buffer;
 #ifndef ENABLE_EMULATION
+#ifdef ESP_PLATFORM
+    uint8_t core = xTaskGetCurrentTaskHandle() == hcore1 ? 1 : 0;
+#else
     uint core = get_core_num();
+#endif
 #endif
     while (!rb->full) {
 #ifndef ENABLE_EMULATION
diff --git a/src/rng/hwrng.h b/src/rng/hwrng.h
index 857e4ec..cc5f33f 100644
--- a/src/rng/hwrng.h
+++ b/src/rng/hwrng.h
@@ -21,7 +21,7 @@
 #define NEUG_PRE_LOOP 32
 
 #include <stdlib.h>
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #endif
 
diff --git a/src/rng/random.c b/src/rng/random.c
index 1e097ee..fbbe491 100644
--- a/src/rng/random.c
+++ b/src/rng/random.c
@@ -65,18 +65,6 @@ void random_bytes_free(const uint8_t *p) {
     neug_flush();
 }
 
-/*
- * Return 4-byte salt
- */
-void random_get_salt(uint8_t *p) {
-    uint32_t rnd;
-
-    rnd = neug_get();
-    memcpy(p, &rnd, sizeof(uint32_t));
-    rnd = neug_get();
-    memcpy(p + sizeof(uint32_t), &rnd, sizeof(uint32_t));
-}
-
 
 /*
  * Random byte iterator
diff --git a/src/rng/random.h b/src/rng/random.h
index bb4ad24..5899c91 100644
--- a/src/rng/random.h
+++ b/src/rng/random.h
@@ -21,9 +21,6 @@
 
 #include <stdlib.h>
 #include <stdint.h>
-#ifndef ENABLE_EMULATION
-#include "pico/stdlib.h"
-#endif
 
 void random_init(void);
 void random_fini(void);
@@ -32,9 +29,6 @@ void random_fini(void);
 const uint8_t *random_bytes_get(size_t);
 void random_bytes_free(const uint8_t *p);
 
-/* 8-byte salt */
-void random_get_salt(uint8_t *p);
-
 /* iterator returning a byta at a time */
 extern int random_gen(void *arg, unsigned char *output, size_t output_len);
 
diff --git a/src/usb/ccid/ccid.c b/src/usb/ccid/ccid.c
index b659acb..09aae89 100644
--- a/src/usb/ccid/ccid.c
+++ b/src/usb/ccid/ccid.c
@@ -15,28 +15,11 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdio.h>
-
-// Pico
-#include "pico/stdlib.h"
-
-// For memcpy
-#include <string.h>
-
-// Include descriptor struct definitions
-//#include "usb_common.h"
-// USB register definitions from pico-sdk
-#include "hardware/regs/usb.h"
-// USB hardware struct definitions from pico-sdk
-#include "hardware/structs/usb.h"
-// For interrupt enable and numbers
-#include "hardware/irq.h"
-// For resetting the USB controller
-#include "hardware/resets.h"
-
 #include "random.h"
 #include "pico_keys.h"
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "hardware/rtc.h"
+#endif
 #include "tusb.h"
 #include "ccid.h"
 #include "device/usbd_pvt.h"
diff --git a/src/usb/hid/hid.c b/src/usb/hid/hid.c
index 738c658..73bd41b 100644
--- a/src/usb/hid/hid.c
+++ b/src/usb/hid/hid.c
@@ -17,8 +17,10 @@
 
 #ifndef ENABLE_EMULATION
 #include "tusb.h"
+#ifndef ESP_PLATFORM
 #include "bsp/board.h"
 #endif
+#endif
 #include "ctap_hid.h"
 #include "pico_keys.h"
 #include "pico_keys_version.h"
diff --git a/src/usb/tusb_config.h b/src/usb/tusb_config.h
index 64f419c..d90a387 100644
--- a/src/usb/tusb_config.h
+++ b/src/usb/tusb_config.h
@@ -26,8 +26,6 @@
 #ifndef _TUSB_CONFIG_H_
 #define _TUSB_CONFIG_H_
 
-#include "usb.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -47,7 +45,7 @@ extern "C" {
 #endif
 
 //--------------------------------------------------------------------
-// COMMON CONFIGURATION
+// Common Configuration
 //--------------------------------------------------------------------
 
 // defined by compiler flags for flexibility
@@ -55,20 +53,20 @@ extern "C" {
 #error CFG_TUSB_MCU must be defined
 #endif
 
-#if CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_LPC43XX || \
-    CFG_TUSB_MCU == OPT_MCU_MIMXRT10XX || \
-    CFG_TUSB_MCU == OPT_MCU_NUC505 || CFG_TUSB_MCU == OPT_MCU_CXD56
-#define CFG_TUSB_RHPORT0_MODE     (OPT_MODE_DEVICE | OPT_MODE_HIGH_SPEED)
-#else
-#define CFG_TUSB_RHPORT0_MODE     OPT_MODE_DEVICE
+#ifndef CFG_TUSB_OS
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+#define CFG_TUSB_OS           OPT_OS_PICO
+#elif CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3
+#define CFG_TUSB_OS           OPT_OS_FREERTOS
+#endif
 #endif
 
-#ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS                 OPT_OS_PICO
+#ifndef CFG_TUSB_RHPORT0_MODE
+#define CFG_TUSB_RHPORT0_MODE    (OPT_MODE_DEVICE | OPT_MODE_FULL_SPEED)
 #endif
 
 #ifndef CFG_TUSB_DEBUG
-#define CFG_TUSB_DEBUG        1
+#define CFG_TUSB_DEBUG        0
 #endif
 
 // Enable Device stack
@@ -120,6 +118,12 @@ extern "C" {
 
 // HID buffer size Should be sufficient to hold ID (if any) + Data
 #define CFG_TUD_HID_EP_BUFSIZE    64
+// CDC FIFO size of TX and RX
+#define CFG_TUD_CDC_RX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
+#define CFG_TUD_CDC_TX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
+
+// CDC Endpoint transfer buffer size, more is faster
+#define CFG_TUD_CDC_EP_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
 
 #ifdef __cplusplus
 }
diff --git a/src/usb/usb.c b/src/usb/usb.c
index 702fe12..c11db10 100644
--- a/src/usb/usb.c
+++ b/src/usb/usb.c
@@ -18,7 +18,7 @@
 #include <stdio.h>
 
 // Pico
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/stdlib.h"
 #include "pico/multicore.h"
 #include "bsp/board.h"
@@ -26,6 +26,13 @@
 #include "pico_keys.h"
 #include "usb.h"
 #include "apdu.h"
+#ifndef ENABLE_EMULATION
+#include "tusb.h"
+#endif
+
+#ifndef ENABLE_EMULATION
+#include "tusb.h"
+#endif
 
 #ifndef ENABLE_EMULATION
 #include "tusb.h"
@@ -156,7 +163,7 @@ void usb_clear_rx(uint8_t itf) {
 
 #define USB_BCD   0x0200
 
-#ifndef ENABLE_EMULATION
+#if !defined(ENABLE_EMULATION)
 queue_t usb_to_card_q;
 queue_t card_to_usb_q;
 #endif
diff --git a/src/usb/usb.h b/src/usb/usb.h
index 8872468..14883c6 100644
--- a/src/usb/usb.h
+++ b/src/usb/usb.h
@@ -18,12 +18,17 @@
 #ifndef _USB_H_
 #define _USB_H_
 
-#ifndef ENABLE_EMULATION
-#include "pico/util/queue.h"
-#else
+#if defined(ENABLE_EMULATION)
 #include <stdbool.h>
+#elif defined(ESP_PLATFORM)
+#include "esp_compat.h"
+#else
+#include "pico/util/queue.h"
 #endif
 
+
+#include "esp_compat.h"
+
 /* USB thread */
 #define EV_CARD_CHANGE        1
 #define EV_TX_FINISHED        2
diff --git a/src/usb/usb_descriptors.c b/src/usb/usb_descriptors.c
index aaa3fdc..4c6ab4e 100644
--- a/src/usb/usb_descriptors.c
+++ b/src/usb/usb_descriptors.c
@@ -17,7 +17,12 @@
 
 #include "tusb.h"
 #include "usb_descriptors.h"
+#if !defined(ENABLE_EMULATION) && !defined(ESP_PLATFORM)
 #include "pico/unique_id.h"
+#endif
+#ifdef ESP_PLATFORM
+#include "tinyusb.h"
+#endif
 #include "pico_keys_version.h"
 #include "usb.h"
 #include "pico_keys.h"
@@ -59,144 +64,33 @@ tusb_desc_device_t desc_device = {
     .bNumConfigurations = 1
 };
 
+#ifndef ESP_PLATFORM
 uint8_t const *tud_descriptor_device_cb(void) {
     return (uint8_t const *) &desc_device;
 }
-
-
+#endif
 //--------------------------------------------------------------------+
 // Configuration Descriptor
 //--------------------------------------------------------------------+
 
-tusb_desc_configuration_t const desc_config  = {
-    .bLength             = sizeof(tusb_desc_configuration_t),
-    .bDescriptorType     = TUSB_DESC_CONFIGURATION,
-    .wTotalLength        = (sizeof(tusb_desc_configuration_t)
-#ifdef USB_ITF_CCID
-                            + (sizeof(tusb_desc_interface_t) + sizeof(struct ccid_class_descriptor) +
-                            3 * sizeof(tusb_desc_endpoint_t))
-                            + (sizeof(tusb_desc_interface_t) + sizeof(struct ccid_class_descriptor) +
-                            2 * sizeof(tusb_desc_endpoint_t))
-#endif
+#define TUD_INTERFACE_DESC_LEN 9
+#define TUD_ENDPOINT_DESC_LEN 7
+#define TUSB_SMARTCARD_LEN 54
+#define TUSB_SMARTCARD_CCID_DESC_LEN (TUD_INTERFACE_DESC_LEN + TUSB_SMARTCARD_LEN + 3 * TUD_ENDPOINT_DESC_LEN)
+#define TUSB_SMARTCARD_WCID_DESC_LEN (TUD_INTERFACE_DESC_LEN + TUSB_SMARTCARD_LEN + 2 * TUD_ENDPOINT_DESC_LEN)
+
+enum {
+ TUSB_DESC_TOTAL_LEN = TUD_CONFIG_DESC_LEN
 #ifdef USB_ITF_HID
-                            + TUD_HID_INOUT_DESC_LEN + TUD_HID_DESC_LEN
+        + TUD_HID_INOUT_DESC_LEN + TUD_HID_DESC_LEN
 #endif
-                            ),
-    .bNumInterfaces      = ITF_TOTAL,
-    .bConfigurationValue = 1,
-    .iConfiguration      = 4,
-    .bmAttributes        = USB_CONFIG_ATT_ONE | TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP,
-    .bMaxPower           = TUSB_DESC_CONFIG_POWER_MA(MAX_USB_POWER + 1),
-};
-
 #ifdef USB_ITF_CCID
-static const struct ccid_class_descriptor desc_ccid = {
-    .bLength                = sizeof(struct ccid_class_descriptor),
-    .bDescriptorType        = 0x21,
-    .bcdCCID                = (0x0110),
-    .bMaxSlotIndex          = 0,
-    .bVoltageSupport        = 0x01,  // 5.0V
-    .dwProtocols            = (0x02), // T=1
-    .dwDefaultClock         = (0xDFC),
-    .dwMaximumClock         = (0xDFC),
-    .bNumClockSupport       = 0,
-    .dwDataRate             = (0x2580),
-    .dwMaxDataRate          = (0x2580),
-    .bNumDataRatesSupported = 0,
-    .dwMaxIFSD              = (0xFE), // IFSD is handled by the real reader driver
-    .dwSynchProtocols       = (0),
-    .dwMechanical           = (0),
-    .dwFeatures             = 0x40840, //USB-ICC, short & extended APDU
-    .dwMaxCCIDMessageLength = 65544 + 10,
-    .bClassGetResponse      = 0xFF,
-    .bclassEnvelope         = 0xFF,
-    .wLcdLayout             = 0x0,
-    .bPINSupport            = 0x0,
-    .bMaxCCIDBusySlots      = 0x01,
-};
-
-tusb_desc_interface_t const desc_interface = {
-    .bLength            = sizeof(tusb_desc_interface_t),
-    .bDescriptorType    = TUSB_DESC_INTERFACE,
-    .bInterfaceNumber   = ITF_CCID,
-    .bAlternateSetting  = 0,
-    .bNumEndpoints      = 3,
-    .bInterfaceClass    = TUSB_CLASS_SMART_CARD,
-    .bInterfaceSubClass = 0,
-    .bInterfaceProtocol = 0,
-    .iInterface         = ITF_CCID + 5,
-};
-
-tusb_desc_interface_t const desc_interface_wcid = {
-    .bLength            = sizeof(tusb_desc_interface_t),
-    .bDescriptorType    = TUSB_DESC_INTERFACE,
-    .bInterfaceNumber   = ITF_WCID,
-    .bAlternateSetting  = 0,
-    .bNumEndpoints      = 2,
-    .bInterfaceClass    = 0xFF,
-    .bInterfaceSubClass = 0,
-    .bInterfaceProtocol = 0,
-    .iInterface         = ITF_WCID + 5,
-};
-
-tusb_desc_endpoint_t const desc_ep1 = {
-    .bLength             = sizeof(tusb_desc_endpoint_t),
-    .bDescriptorType     = TUSB_DESC_ENDPOINT,
-    .bEndpointAddress    = TUSB_DIR_IN_MASK | 1,
-    .bmAttributes.xfer   = TUSB_XFER_BULK,
-    .wMaxPacketSize = (64),
-    .bInterval           = 0
-};
-
-tusb_desc_endpoint_t const desc_ep2 = {
-    .bLength             = sizeof(tusb_desc_endpoint_t),
-    .bDescriptorType     = TUSB_DESC_ENDPOINT,
-    .bEndpointAddress    = 1,
-    .bmAttributes.xfer   = TUSB_XFER_BULK,
-    .wMaxPacketSize = (64),
-    .bInterval           = 0
-};
-
-tusb_desc_endpoint_t const desc_ep3 = {
-    .bLength             = sizeof(tusb_desc_endpoint_t),
-    .bDescriptorType     = TUSB_DESC_ENDPOINT,
-    .bEndpointAddress    = TUSB_DIR_IN_MASK | 2,
-    .bmAttributes.xfer   = TUSB_XFER_INTERRUPT,
-    .wMaxPacketSize = (64),
-    .bInterval           = 0
-};
-
-tusb_desc_endpoint_t const desc_ep1_wcid = {
-    .bLength             = sizeof(tusb_desc_endpoint_t),
-    .bDescriptorType     = TUSB_DESC_ENDPOINT,
-    .bEndpointAddress    = (TUSB_DIR_IN_MASK | 1) + 3,
-    .bmAttributes.xfer   = TUSB_XFER_BULK,
-    .wMaxPacketSize = (64),
-    .bInterval           = 0
-};
-
-tusb_desc_endpoint_t const desc_ep2_wcid = {
-    .bLength             = sizeof(tusb_desc_endpoint_t),
-    .bDescriptorType     = TUSB_DESC_ENDPOINT,
-    .bEndpointAddress    = 1 + 3,
-    .bmAttributes.xfer   = TUSB_XFER_BULK,
-    .wMaxPacketSize = (64),
-    .bInterval           = 0
-};
+        + TUSB_SMARTCARD_CCID_DESC_LEN
+#ifdef USB_ITF_WCID
+        + TUSB_SMARTCARD_WCID_DESC_LEN
 #endif
-
-static uint8_t desc_config_extended[sizeof(tusb_desc_configuration_t)
-#ifdef USB_ITF_CCID
-                                    + (sizeof(tusb_desc_interface_t) +
-                                    sizeof(struct ccid_class_descriptor) + 3 *
-                                    sizeof(tusb_desc_endpoint_t))
-                                    + (sizeof(tusb_desc_interface_t) + sizeof(struct ccid_class_descriptor) +
-                                    2 * sizeof(tusb_desc_endpoint_t))
 #endif
-#ifdef USB_ITF_HID
-                                    + TUD_HID_INOUT_DESC_LEN + TUD_HID_DESC_LEN
-#endif
-];
+};
 
 #ifdef USB_ITF_HID
 uint8_t const desc_hid_report[] = {
@@ -205,23 +99,40 @@ uint8_t const desc_hid_report[] = {
 uint8_t const desc_hid_report_kb[] = {
     TUD_HID_REPORT_DESC_KEYBOARD(HID_USAGE(HID_USAGE_DESKTOP_GAMEPAD), HID_LOGICAL_MIN(0), HID_LOGICAL_MAX_N(255, 2), HID_REPORT_COUNT(8), HID_REPORT_SIZE(8), HID_FEATURE( HID_DATA | HID_VARIABLE | HID_ABSOLUTE), )
 };
-#define EPNUM_HID   0x03
+#define EPNUM_HID   0x04
+#endif
 
-static uint8_t desc_hid[] = {
-    TUD_HID_INOUT_DESCRIPTOR(ITF_HID,
-                             ITF_HID + 5,
-                             HID_ITF_PROTOCOL_NONE,
-                             sizeof(desc_hid_report),
-                             EPNUM_HID,
-                             0x80 | EPNUM_HID,
-                             CFG_TUD_HID_EP_BUFSIZE,
-                             10)
+#ifdef USB_ITF_CCID
+#ifdef USB_ITF_WCID
+#define TUD_SMARTCARD_DESCRIPTOR_WEB(_itf, _strix, _epout, _epin, _epsize) \
+    9, TUSB_DESC_INTERFACE, _itf, 0, 2, 0xFF, 0, 0, _strix, \
+    54, 0x21, U16_TO_U8S_LE(0x0110), 0, 0x1, U32_TO_U8S_LE(0x2), U32_TO_U8S_LE(0xDFC), U32_TO_U8S_LE(0xDFC), 0, U32_TO_U8S_LE(0x2580), U32_TO_U8S_LE(0x2580), 0, U32_TO_U8S_LE(0xFE), U32_TO_U8S_LE(0), U32_TO_U8S_LE(0), U32_TO_U8S_LE(0x40840), U32_TO_U8S_LE(65544+10), 0xFF, 0xFF, U16_TO_U8S_LE(0x0), 0, 0x1, \
+    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0, \
+    7, TUSB_DESC_ENDPOINT, _epin,  TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
+#endif
+#define TUD_SMARTCARD_DESCRIPTOR(_itf, _strix, _epout, _epin, _epint, _epsize) \
+    9, TUSB_DESC_INTERFACE, _itf, 0, 3, TUSB_CLASS_SMART_CARD, 0, 0, _strix, \
+    54, 0x21, U16_TO_U8S_LE(0x0110), 0, 0x1, U32_TO_U8S_LE(0x2), U32_TO_U8S_LE(0xDFC), U32_TO_U8S_LE(0xDFC), 0, U32_TO_U8S_LE(0x2580), U32_TO_U8S_LE(0x2580), 0, U32_TO_U8S_LE(0xFE), U32_TO_U8S_LE(0), U32_TO_U8S_LE(0), U32_TO_U8S_LE(0x40840), U32_TO_U8S_LE(65544+10), 0xFF, 0xFF, U16_TO_U8S_LE(0x0), 0, 0x1, \
+    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0, \
+    7, TUSB_DESC_ENDPOINT, _epin,  TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0, \
+    7, TUSB_DESC_ENDPOINT, _epint,  TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_epsize), 0
+#endif
+
+const uint8_t desc_config[] = {
+    TUD_CONFIG_DESCRIPTOR(1, ITF_TOTAL, 4, TUSB_DESC_TOTAL_LEN, USB_CONFIG_ATT_ONE | TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
+#ifdef USB_ITF_HID
+    TUD_HID_INOUT_DESCRIPTOR(ITF_HID, ITF_HID + 5, HID_ITF_PROTOCOL_NONE, sizeof(desc_hid_report), EPNUM_HID, TUSB_DIR_IN_MASK | EPNUM_HID, CFG_TUD_HID_EP_BUFSIZE, 10),
+    TUD_HID_DESCRIPTOR(ITF_KEYBOARD, ITF_KEYBOARD + 5, HID_ITF_PROTOCOL_NONE, sizeof(desc_hid_report_kb), TUSB_DIR_IN_MASK | (EPNUM_HID + 1), 16, 5),
+#endif
+#ifdef USB_ITF_CCID
+    TUD_SMARTCARD_DESCRIPTOR(ITF_CCID, ITF_CCID+5, 1, TUSB_DIR_IN_MASK | 1, TUSB_DIR_IN_MASK | 2, 64),
+#ifdef USB_ITF_WCID
+    TUD_SMARTCARD_DESCRIPTOR_WEB(ITF_WCID, ITF_WCID+5, 3, TUSB_DIR_IN_MASK | 3, 64),
+#endif
+#endif
 };
 
-static uint8_t desc_hid_kb[] = {
-    TUD_HID_DESCRIPTOR(ITF_KEYBOARD, ITF_KEYBOARD + 5, HID_ITF_PROTOCOL_NONE,
-                       sizeof(desc_hid_report_kb), 0x80 | (EPNUM_HID + 1), 16, 5)
-};
+#ifdef USB_ITF_HID
 #include "apdu.h"
 uint8_t const *tud_hid_descriptor_report_cb(uint8_t itf) {
     printf("report_cb %d\n", itf);
@@ -235,50 +146,24 @@ uint8_t const *tud_hid_descriptor_report_cb(uint8_t itf) {
     return NULL;
 }
 #endif
-
+#ifndef ESP_PLATFORM
 uint8_t const *tud_descriptor_configuration_cb(uint8_t index) {
     (void) index; // for multiple configurations
-
-    static uint8_t initd = 0;
-    if (initd == 0) {
-        uint8_t *p = desc_config_extended;
-        memcpy(p, &desc_config, sizeof(tusb_desc_configuration_t));
-        p += sizeof(tusb_desc_configuration_t);
-#ifdef USB_ITF_HID
-        memcpy(p, &desc_hid, sizeof(desc_hid)); p += sizeof(desc_hid);
-        memcpy(p, &desc_hid_kb, sizeof(desc_hid_kb)); p += sizeof(desc_hid_kb);
-#endif
-#ifdef USB_ITF_CCID
-        memcpy(p, &desc_interface, sizeof(tusb_desc_interface_t));
-        p += sizeof(tusb_desc_interface_t);
-        memcpy(p, &desc_ccid, sizeof(struct ccid_class_descriptor));
-        p += sizeof(struct ccid_class_descriptor);
-        memcpy(p, &desc_ep1, sizeof(tusb_desc_endpoint_t)); p += sizeof(tusb_desc_endpoint_t);
-        memcpy(p, &desc_ep2, sizeof(tusb_desc_endpoint_t)); p += sizeof(tusb_desc_endpoint_t);
-        memcpy(p, &desc_ep3, sizeof(tusb_desc_endpoint_t)); p += sizeof(tusb_desc_endpoint_t);
-
-        memcpy(p, &desc_interface_wcid, sizeof(tusb_desc_interface_t));
-        p += sizeof(tusb_desc_interface_t);
-        memcpy(p, &desc_ccid, sizeof(struct ccid_class_descriptor));
-        p += sizeof(struct ccid_class_descriptor);
-        memcpy(p, &desc_ep1_wcid, sizeof(tusb_desc_endpoint_t)); p += sizeof(tusb_desc_endpoint_t);
-        memcpy(p, &desc_ep2_wcid, sizeof(tusb_desc_endpoint_t)); p += sizeof(tusb_desc_endpoint_t);
-#endif
-        initd = 1;
-    }
-    return (const uint8_t *) desc_config_extended;
+    printf("tud_descriptor_configuration_cb %d\n",index);
+    return desc_config;
 }
+#endif
 
+#ifdef USB_ITF_WCID
 #define BOS_TOTAL_LEN     (TUD_BOS_DESC_LEN + TUD_BOS_WEBUSB_DESC_LEN + TUD_BOS_MICROSOFT_OS_DESC_LEN)
 #define MS_OS_20_DESC_LEN  0xB2
 
-
 enum
 {
   VENDOR_REQUEST_WEBUSB = 1,
   VENDOR_REQUEST_MICROSOFT = 2
 };
-#define URL  "picokeys.com/pki/"
+#define URL  "www.picokeys.com/pki/"
 static bool web_serial_connected = false;
 
 const tusb_desc_webusb_url_t desc_url =
@@ -369,10 +254,9 @@ uint8_t const desc_bos[] = {
 };
 
 uint8_t const *tud_descriptor_bos_cb(void) {
-    printf("!!!!!!!!!!!! tud_descriptor_bos_cb\n");
     return desc_bos;
 }
-
+#endif
 //--------------------------------------------------------------------+
 // String Descriptors
 //--------------------------------------------------------------------+
@@ -390,10 +274,21 @@ char const *string_desc_arr [] = {
 #endif
 #ifdef USB_ITF_CCID
     , "Pico Key CCID Interface"
+#ifdef USB_ITF_WCID
     , "Pico Key WebCCID Interface"
 #endif
+#endif
 };
 
+#ifdef ESP_PLATFORM
+const tinyusb_config_t tusb_cfg = {
+    .device_descriptor = &desc_device,
+    .string_descriptor = string_desc_arr,
+    .string_descriptor_count = sizeof(string_desc_arr) / sizeof(string_desc_arr[0]),
+    .external_phy = false,
+    .configuration_descriptor = desc_config,
+};
+#else
 static uint16_t _desc_str[32];
 
 uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
@@ -414,12 +309,8 @@ uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
         }
 
         const char *str = string_desc_arr[index];
-        char unique_id_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
         if (index == 3) {
-            pico_unique_board_id_t unique_id;
-            pico_get_unique_board_id(&unique_id);
-            pico_get_unique_board_id_string(unique_id_str, 2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1);
-            str = unique_id_str;
+            str = pico_serial_str;
         }
 
         chr_count = strlen(str);
@@ -437,3 +328,4 @@ uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
 
     return _desc_str;
 }
+#endif