STM32G070RBT6 I2C communication with ESP32 S3 C1 devkit

[RamyaD]

Hi, I am new to STM32, I am trying the i2c communication between stm32 and esp32. I am using STM32 as slave and ESP32 as Master. I am using Arduino IDE

I connected stm32  PB6-SCL, PB7-SDA to esp32  GPIO21-SDA, GPIO19-SCL.

i was not getting any response in the output. Can anyone help me with it.

Code is attached.

Thanks 

[Foued_KH]

Hello @RamyaD , 

Could you please connect GND to GND.

Take an oscilloscope to check SDA and SCL behavior. 

Foued

[RamyaD]

HI @Foued_KH , 

It was done. Thanks for the replay.

[RhSilicon]

The Arduino IDE will mask a lot of things, the ideal would be to use the STM32CubeIDE for the STM32:

How to use I2C Communication in STM32 Microcontroller (Arduino IDE)

Getting started with I2C (STM32Cube)