MicroPython
Invalid pin 20 for I2C on Adafruit ESP32 Feather V2 #9372
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I am trying to make an I2C interface for Adafruit ESP32 Feather V2 (ESP32-PICO-MINI-02). On this board SCL is pin 20 and SDA is pin 22. When I try to make a pin object with Pin(20), I get an "invalid pin" ValueError. It looks like the cause of this is that pin 20 is listed as NULL in micropython/ports/esp32.. Maybe I am not specifying the board correctly somewhere or ? Update: Maybe I'm confusing the chip pin number and the board pin number. On the board schematic, it shows that the chip pins are 34 and 26 for SDA and SCL. When I try those (i.e., I2C(1, scl=machine.Pin(26), sda=machine.Pin(34), freq=400000)), I get different errors: E (350) i2c: /home/micropython/esp-idf-v4.2/components/driver/i2c.c:762 (i2c_set_pin):sda gpio number error |
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Replies: 1 comment 1 reply
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Looks like this is a known issue. "Pin 20 does not currently work properly in MicroPython. This warning will remain until the necessary updates are completed by MicroPython to resolve this issue." |
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See #9375 for more info. (Please don't raise duplicate posts) |
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Looks like this is a known issue.
"Pin 20 does not currently work properly in MicroPython. This warning will remain until the necessary updates are completed by MicroPython to resolve this issue."