Hi
I am using the ESP32 function i2c_master_cmd_begin() as:
err = i2c_master_cmd_begin(I2C_NUM_0, cmd, 1000 / portTICK_RATE_MS);
and every now and then this function returns -1 (which is an error).
Would there be a reason for this to happen?
thanks,
i2c_master_cmd_begin() fails
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Re: i2c_master_cmd_begin() fails
From what I can read, this indicates an 'ACK error'. I think this means the slave did not acknowledge the I2C request, but I'm not entirely sure.
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