In this project I used both the capabilities of the Arduino and ESP-IDF with FreeRTOS.

• Platform: WEMOS LOLIN32
• Framework: Arduino
• Upload Method:
  • esptool (Default)
  • jlink
  • esp-prog (Based on FT2232H or FT232H)
• Debug Method:
  • esp-prog (Based on FT2232H or FT232H)

Set CONFIG_FREERTOS_UNICORE=y in sdkconfig.lolin32 to use only core 0 for demo purposes.

Add a small delay (10ms) to infinite loops to prevent Task watchdog got triggered warning.

• Task watchdog got triggered - it is fixed with a vTaskDelay of 10ms but is this a bug? (IDFGH-5818) #1646

Or you can set priority of all tasks to 0 (Idle).

• Task watchdog got triggered - The tasks did not reset the watchdog in time

Debugging feature of PlatformIO for Esp32 is buggy. But if you set the framework to Arduino, you can have a bit better debugging experience than ESP-IDF framework.

The hardware used for debugging ESP32 is an FT232H USB-JTAG adapter:

Connect ESP32 to FT232H USB-JTAG adapter according to the following table:

For more information, read the following articles:

• Low-cost ESP32 In-circuit Debugging
• ESP32 JTAG debugging

Just start your program from extern "C" void app_main(void) instead of void setup() and void loop().

pio run -t menuconfig

Note: Use `J` and `K` instead of up and down arrow keys to move between items in `menuconfig`

• WEMOS LOLIN32
• ESP32 Hardware Serial2 Example
• GPIO Matrix and Pin Mux
• ESP32 Digital Inputs & Digital Outputs – Arduino Tutorial
• Introduction to RTOS (YouTube)
• Introduction to RTOS (GitHub)
• Watchdogs
• Universal Asynchronous Receiver/Transmitter (UART)
• UART Echo Example
• Hello World with ESP32 Explained
• ESP-IDF for PlatformIO
• ESP32 UART Communication using ESP-IDF
• uxTaskGetStackHighWaterMark
• Stop boot rom logs , panic handler logs on UART 0 on Esp-Wroom-32
• Why is volatile needed in C?
• ESP32 as I2C Master Tutorial (ESP-IDF)
• How To Track Orientation with Arduino and ADXL345 Accelerometer
• esp32-i2c-adxl345
• ESP-IDF components
• Measuring analog inputs with ESP32 ADC (ESP-IDF)

• onewire - Bit-banging one wire driver
• onewire
• ds18x20 - Driver for DS18B20/DS18S20
• ds18x20
• matjazv / ds18b20

• ESP32 SPI Master (ESP-IDF)
• ESP32 SPI Master Slave Communication with ESP-IDF
• SPI master half duplex EEPROM example
• SPI Flash API

• FAT FS on External Flash example
• SPIFFS file system limitations
• SPIFFS (SPI Flash File System)
• LittleFS
• SPIFFS Filesystem
• FAT Filesystem Support
• Wear Levelling API
• Virtual filesystem component
• How to work on SPIFFS in ESP32 using ESP-IDF

• SPIFFS example
• Create a custom partitions table (CSV) in PIO
• Creating Custom Tables (ESP-IDF)