Hi,

I am using Beetle ESP32 - C3 from DFRobot to interact with some I2C device. I have tried different configurations and was unable to get it to work.

Here is an example of code I used for AHT10 sensor as it has a very simple interface and usually works out of the box:

#include <Wire.h>

#define AHT10_ADDRESS 0x38

#define AHT10_CMD_INIT 0xE1

#define AHT10_CMD_TRIGGER 0xAC

#define AHT10_CMD_RESET 0xBA

void setup() {

Serial.begin(115200);

Wire.begin(8, 9); // SDA, SCL

if (!aht10_init()) {

Serial.println("AHT10 initialization failed!");

while (1);

}

Serial.println("AHT10 initialized successfully.");

}

void loop() {

// Sensor data reading code...

}

bool aht10_init() {

Wire.beginTransmission(AHT10_ADDRESS);

Wire.write(AHT10_CMD_INIT);

Wire.write(0x08);

Wire.write(0x00);

if (Wire.endTransmission() != 0) {

return false;

}

delay(20);

return true;

}

The code above produces the following error:

AHT10 initialization failed!

I have set the SDA and SCL to 8 and 9 respectively as it is shown in the pinout of the board.

I have tried the same code with different boards like the ESP-WROOM-32 from other manufacturers where SDA and SCL are set to default pins 21 and 22 and everything seems to work.

Is there something I am missing here?