Firmware for a device to control a manual ball valve with the BTT S42B V2.0.
Intended for use as a "smart servo", you set the desired position and it goes there, reporting errors if any. Could also be used as a "minimal" firmware for experiments. Motor movement is only controlled by the encoder reading, no complicated step calculations. If the motor does not move the expected amount in a given interval, an error is reported. Same goes for over-temperature and encoder errors. No LCD support, configuration in header file, minimal serial communication.
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