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bedroyz3r2021-05-17 15:38:16
Arduino
bedroyz3r, 2021-05-17 15:38:16

How to swap SDA and SCL?

Hello. Somehow I assembled a project based on Wemos D1 mini and (as it was possible) configured the connected buttons and display in the sketch. It so happened that after wrapping up, I soldered it and indicated in the config the display connection pins on the contrary (SDA-> SCL, SCL-> SDA). Everything worked until I wanted to use it for other purposes. The device is assembled in a sealed plastic case, which I don’t want to disassemble anymore, because the case is very small, and the soldering is very flimsy. When it came time to work with the Adafruit and Wire standard libraries, I realized that nothing came of it. How to swap pins in the Wire config? I can't even find this library because I have an application from the Windows store.

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Ocelot, 2021-05-18
@Ocelot

The answer in the first approximation: no, it is impossible. All standard libraries use hardware i2c, it hangs on certain pins that are not remapped.
A deeper answer: if you really want to, then you can. Look for the software i2c library. Communication will eat more CPU, but you can assign any pins.

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