add note about I2C issues with certain microcontrollers #35
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the example wasn't aligned anymore with the current implementation and thus didn't compile if copied directly.
while i can use the sensor (& library) directly with my STM32F4 it doesn't work out of the box with my ESP32C6. after some digging & debugging i found [esp-hal#352] which explains this same problem (though for a BNO080) and the solution for it (increased timeout). i think it's worth adding a note here as people will find this library more easily than the solution (esp. since Adafruit doesn't mention the solution and kind-of just says "meh, don't use it with those microcontrollers"). [esp-hal#352]: esp-rs/esp-hal#352
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one more thing which might make sense to add to the README (i can do that if you agree): you have to wait for the sensor to boot up before talking to it. as per the documentation (see chapter 1.2 / page 14) this is ~400ms (start-up time) / 650ms (power on reset time). my STM32 was slow enough so i didn't notice this, but with the ESP32 it fails on the first attempt |
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@rursprung thank you, sure, please add a note about the initial delay too |
done |
eupn
approved these changes
Mar 1, 2024
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while i can use the sensor (& library) directly with my STM32F4 it doesn't work out of the box with my ESP32C6. after some digging & debugging i found esp-rs/esp-hal#352 which explains this same problem (though for a BNO080) and the solution for it (increased timeout).
i think it's worth adding a note here as people will find this library more easily than the solution (esp. since Adafruit doesn't mention the solution and kind-of just says "meh, don't use it with those microcontrollers").