ESPHome: failed to execute 'open' on 'serialport': failed to open serial port.
Recently i wanted to flash another Wemos D1 Mini but actually had no chance to do it from my Windows 10 PC. Symptom: 1 failed to execute 'open' on 'serialport': failed to open serial port. Solution 1: Downgrade the Driver of the Serial Port to an older one as described here . Solution 2: Change the Baud-Rate of the Serial Port via the Device Manager. Right click on the USB serial port > Properties > Port setting > change the bits per second from 9600 to 115200....