Turn printer on/off with a ESP32 + Relay

Tasmota Firmware Download

for ESP8266
https://ota.tasmota.com/tasmota/

for ESP32
https://ota.tasmota.com/tasmota32/release/

Flash Tasmota to ESP32 module with USB to serial adapter

1. install python
2. check if python is installed -> open cmd prompt as admin
3. python --version
4. check if pip is installed
5. pip --verion
6. install esptool see https://tasmota.github.io/docs/Getting-Started/
7. python -m pip install esptool
8. attach USB to serial adapter to ESP32 module and the PC, check in windows device manager which COM port the serial adapter is
9. backup firmware
10. python -m esptool --port COM3 read_flash 0x00000 0x100000 fwbackup2.bin
11. delete flash storage of the ESP32 module
12. python -m esptool --port COM3 erase_flash
13. download tasmota.bin from tasmota website, add to the system32 directory. tasmota32.factory.bin for the first time flash should be used!
14. python -m esptool --port COM3 write_flash 0x0 tasmota32.factory.bin
15. after flash is finished, disconnect ESP32 module. The normal tasmota GUI should appear.