Compatibility issue with ESP32-C3. Compiling errors!

Issues and Errors
1

This exact same sketch works fine with ESP32 and ESP32-S2.

details :
• ESP32-C3 USB
• Windows 10
• Blynk server
• Blynk Library version 1.0.1
• https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
• Add your sketch code.

char ssid[] = "aaaaa";
char pass[] = "bbbbb";
char LocalAuthToken[] = "cccccccccccccccccccc";
BlynkTimer timer;

void setup() {
Blynk.begin(LocalAuthToken, ssid, pass);   
  while (Blynk.connect() == false);

}

void loop() {
  Blynk.run();
  timer.run();
}


Arduino: 1.8.15 (Windows 10), Board: "ESP32C3 Dev Module, Disabled, UART0, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 160MHz (WiFi), QIO, 80MHz, 4MB (32Mb), 921600, None"

c:/users/chatr.asus/appdata/local/arduino15/packages/esp32/tools/riscv32-esp-elf-gcc/gcc8_4_0-esp-2021r1/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: sketch\rgbZebra-c3.ino.cpp.o: in function `BlynkApi<BlynkProtocol<BlynkArduinoClientGen<Client> > >::processCmd(void const*, unsigned int)':

D:\Arduino\libraries\Blynk\src/BlynkApiArduino.h:92: undefined reference to `esp32_adc2gpio'

c:/users/chatr.asus/appdata/local/arduino15/packages/esp32/tools/riscv32-esp-elf-gcc/gcc8_4_0-esp-2021r1/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: D:\Arduino\libraries\Blynk\src/BlynkApiArduino.h:92: undefined reference to `esp32_adc2gpio'

c:/users/chatr.asus/appdata/local/arduino15/packages/esp32/tools/riscv32-esp-elf-gcc/gcc8_4_0-esp-2021r1/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: D:\Arduino\libraries\Blynk\src/BlynkApiArduino.h:100: undefined reference to `esp32_adc2gpio'

c:/users/chatr.asus/appdata/local/arduino15/packages/esp32/tools/riscv32-esp-elf-gcc/gcc8_4_0-esp-2021r1/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: D:\Arduino\libraries\Blynk\src/BlynkApiArduino.h:100: undefined reference to `esp32_adc2gpio'

collect2.exe: error: ld returned 1 exit status

Multiple libraries were found for "WiFi.h"

 Used: C:\Users\chatr.asus\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.0\libraries\WiFi

 Not used: C:\Program Files (x86)\Arduino\libraries\WiFi

exit status 1

Error compiling for board ESP32C3 Dev Module.
2

Did you manage to solve this issue? I have the same problem with Arduino 1.8.19 on Linux.

3

In the file /home/me/.arduino15/packages/esp32/hardware/esp32/2.0.2/variants/esp32c3/pins_arduino.h
I have commented out the line:
#define analogInputToDigitalPin(p) (((p)<NUM_ANALOG_INPUTS)?(esp32_adc2gpio[(p)]):-1)

That removed the error and now blynk works.

4

@vshymanskyy - something you may need to be aware of?

Pete.