@jimpower Oh, didn't realize you had changed devices. So do you get a value equivalent to 4ma through the INA device (may need to be scaled) ? when not in the water ?

@noboz32 Do you mean just seeing what devices are connected to I2C? If so, please see the i2c.scan() function: https://docs.pycom.io/chapter/firmwareapi/pycom/machine/I2C.html#i2cscan