qmc5883 on esp32

[sbelin]

Hello,

I am looking for a micropython module to use the qmc5883 sensor with an esp32 card (M5stack) on the i2c port.
Does anyone use this sensor?
Thank you in advance,
Best regards,

Stéphane

[Roberthh]

I have a simple driver here: https://github.com/robert-hh/QMC5883
It is written for the Pycom variant of MicroPython. So you have to adapt the calls to i2c.writeto_mem(), which require a buffer as third parameter instead optional an integer constant.

[sbelin]

Thank you for your answer.
I have just tested your script.
The error message matches.
But I do not see how to modify your script ...
Thank you in advance,

Stéphane

Traceback (most recent call last):
   File "<stdin>", line 3, in <module>
   File "qmc5883.py", line 86, in __init__
   File "qmc5883.py", line 89, in reset
TypeError: object with required buffer protocol
  >
MicroPython ESP32_LoBo_v3.2.24 - 2018-09-06 on M5Stack with ESP32
Type "help ()" for more information.
>>>

[Roberthh]

try replacing these two methods;

Code: Select all

    
    def reset(self):
        self.i2c.writeto_mem(QMC5883.ADDR, QMC5883.RESET, bytes((0x01,)))
        time.sleep(0.1)
        self.reconfig()

    def reconfig(self):
        self.i2c.writeto_mem(QMC5883.ADDR, QMC5883.CONFIG,
                             bytes((self.oversampling | self.range |
                             self.rate | self.mode,)))
        time.sleep(0.01)
        self.i2c.writeto_mem(QMC5883.ADDR, QMC5883.CONFIG2,
                             bytes((QMC5883.CONFIG2_INT_DISABLE,)))
        time.sleep(0.01)

[sbelin]

It works!
Thank you.