Use Wemos D1 Mini with broken UART

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Connect using external USB - UART converter: ground, 5V, RX, TX
Connect D3 (flash) to ground
To erase:

python3 -I ~/.arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptool/esptool.py -p /dev/ttyUSB0 --chip esp8266 --before no_reset --baud 74880 --trace erase_flash

To flash, use Arduino IDE, set baud rate to 115200

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