A place to put your YouTube video that is ESP8266 related.
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By masutokw
#76746 I have wrote some firmware for STM32f030 (GNU ARM GCC, libopencm3),the microcontroller used in this shield for two dc motors.
Actually Interface is serial to simplify development but I will adapt it for I2C soon
TB6621FNG H-Bridges and drive 1.2A steppers.Supports microstep mode up to 128msteps,editable microstep tables change resolution on the fly and voltage control.I will upload code to github when fully checked