I am trying to integrate stsafe-A110 in a project based on ESP32. I cannot have i2c working (e.g. StSafeA_Echo() is failing ...) .

[Thierry Didi]

Would it be possible to have a description of i2c read / i2c write commands (start condition, ack, end condition ... ). I cannot find this description in STSAFE datasheet.

best regards,

Thierry

[Thierry Didi]

Hello, here is one precision about what "not working" means:

• I2C Read and I2C write functions seem to be working (i.e. they return OK, while if I change the I2C address for instance, they fail)
• But the device always replies with a first byte equal to 0X01, and next bytes equal to 0XFF, 0XFF ....

Do you have any idea about where this could come from ?

Best regards

Thierry

[Benjamin BARATTE]

Hi Thierry,

Could you share a capture of the I2C communication between your ESP32 and the STSAFE-A110 ?

Error 0x01 reported by STSAFE-A110 is general communication error, generally link to wrong CRC at the end of the command.

Thanks,

Best Regards,

Benjamin BARATTE

[Thierry Didi]

Hello Benjamin,

Thanks for you reply - I have finally solved my issue. I was not executing the proper I2C sequence for reading the response. I have rewritten my read() service based on some esp32 examples (my project uses esp32) and it works now,

Best Regards

Thierry