<![CDATA[SPI on M5Tough (MAX31865)]]>I have done several projects with the M5Tough and I really love the device. However I need an SPI connection now on the M5Tough to communicate with a MAX31865 for reading out temperatures from a PT100. This is a real requirement I can not use something else than a PT100!
I always use Arduino code for the M5Tough, how can I configure the pins on the extensions board as (software) SPI pins and have it working with the Adafruit arduino Library?
Can you please get me started/help me out here please?

]]>https://community.m5stack.com/topic/3754/spi-on-m5tough-max31865RSS for NodeTue, 28 Apr 2026 23:55:29 GMTThu, 18 Nov 2021 14:04:11 GMT60<![CDATA[Reply to SPI on M5Tough (MAX31865) on Thu, 18 Nov 2021 18:10:44 GMT]]>@felmue thank you for this quick and excellent reply!!! I will do this. Can you just tell me if I need to specify the pins as GPIO33 or 33 in the constructor

]]>https://community.m5stack.com/post/15514https://community.m5stack.com/post/15514Thu, 18 Nov 2021 18:10:44 GMT<![CDATA[Reply to SPI on M5Tough (MAX31865) on Thu, 18 Nov 2021 15:08:28 GMT]]>Hello @GrtVHecke

software SPI can be assigned to almost any GPIO - just select four GPIOs available on port A (GPIO33 / 32), port B (GPIO36 / 26) and C (GPIO13 / 14).
Note: GPIO36 can only be an input

In you sketch use this line:

// Use software SPI: CS, DI, DO, CLK
Adafruit_MAX31865 thermo = Adafruit_MAX31865(<CS>, <MOSI>, <MISO>, <SCK>);

Thanks
Felix

]]>https://community.m5stack.com/post/15513https://community.m5stack.com/post/15513Thu, 18 Nov 2021 15:08:28 GMT