blue pill serial dimmer Blue pill STM32F103 example with Arduino framework in platformio Flashing with stlink, move boot0 jumper to 1 : programming mode press reset set the jumper back serial command examples {"all":100} {"all":1000} {"all":9000} {"all":10000} {"list":[1000,2000,3000,4000,5000]} {"list":[1000,2000,3000,4000,5000,6000,7000,8000]} {"L2":3000,"L5":4000} {"get":"status"}