Thermal unit MLX90640 with Core2
Hexyl last edited by
I have obtained a Core2 with a thermal unit (MLX90640). The example code for the thermal unit does not work on the Core2. Also, in UiFlow there is no option to add the thermal unit with the "+" icon. However if I start UiFlow and select the classic Core, it is possible to add the thermal unit.
Is the themal unit not compatible with the Core2?
felmue last edited by felmue
most modules, units and their associated examples have been developed before M5Core2 was available and therefore often do not just work out of the box. It is a pity that the M5Stack engineers do not (can not) spare more time to adapt / fix the existing examples from M5Stack to M5Core2.
That said, the issue you are facing is that in M5Stack port A uses GPIO21 / GPIO22 (same as the internal I2C bus). In M5Core2 that has changed and only the internal I2C bus uses GPIO21 and GPIO22, however the external I2C bus on port A uses GPIO32 and GPIO33.
In the Thermal unit example try replacing these lines:
M5.begin(); M5.Power.begin(); Wire.begin();
M5.begin(true, false, true, true);
trueenables the external I2C bus on GPIO32 and GPIO33.
Hope this helps.
Re UIFlow: I have no idea as to if and when the thermal camera will be supported. That is another question for the M5Stack engineers.
Broder last edited by
I just finished to adopt the example at https://github.com/m5stack/M5Stack/blob/master/examples/Unit/THERMAL_MLX90640/THERMAL_MLX90640.ino
in Arduino IDE to Core2 and it works fine. If you are interested I can share the code.
LeoZeLion last edited by
@broder Hello !
Yes, good stuff !! i'm interested by your Core2 version of the Thermal_LMX90640.ino !!
Can you give me a link where I can download it please?