{"NAME":"ESP-12H","GPIO":[1,1,1,0,0,1,0,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,0,0,1,0,0,0,0,0,1,1,0,0],"FLAG":0,"BASE":1}

Requires a special ESP32-S2 tasmota32 binary. Download unofficial development build.

This module is pin compatible with WB3, WB3L, WB3S, WBR3, WR3, WR3E, WR3L, WR3N, CB3S, CB3L, C-8138, ESP-12E/F/S and more…

Early line of ESP-12H have a labelling error. IO28 is supposed to be IO29. The image above is the correct pinout.

Flashing

To put the module in flash mode GPIO0 needs to be pulled low.

Flash using Tasmota Web Installer using Tasmota32-S2 option.

If using esptool.py download required files and tasmota32s2.bin and put them in the same folder.

esptool.py --chip esp32s2 --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dout --flash_freq 40m --flash_size detect 0x1000 bootloader_dout_40m.bin 0x8000 partitions.bin 0xe000 boot_app0.bin 0x10000 tasmota32s2.bin

You can purchase (AliExpress, Amazon, Banggood) a test board for effortless flashing. Just drop the module in, plug in the USB cable, hold the boot button while powering up and flash!

Running

ESP32’s are power hungry on boot and the USB to serial adapter might not be able to provide enough power for that. Use a stable 3.3v power supply that can supply more than 500 mA

Datasheet