Ai-Thinker ESP32-S2F Module (ESP-12H) Configuration for Tasmota

Ai-Thinker ESP32-S2F Module (ESP-12H)

GLOBAL

Available from:
Aliexpress.com

Manufacturer:
Alibaba.com

GPIO #	Component
GPIO00	User
GPIO01	User
GPIO02	User
GPIO03	None
GPIO04	None
GPIO05	User
GPIO06	None
GPIO07	User
GPIO08	User
GPIO09	User
GPIO10	User
GPIO11	User
GPIO12	User
GPIO13	None
GPIO14	None
GPIO15	None
GPIO16	None
GPIO17	None
GPIO18	None
GPIO19	User
GPIO20	User
GPIO21	User
GPIO33	User
GPIO34	User
GPIO35	None
GPIO36	None
GPIO37	User
GPIO38	None
GPIO39	None
GPIO40	None
GPIO41	None
GPIO42	None
GPIO43	User
GPIO44	User
GPIO45	None
GPIO46	None

Configuration for ESP32-S2

{"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}

This module can replace modules such as: BT3L, CB3S, CB3L, CR3L, C-8138, ESP-12, FL_M93_V1, MRE3S, MWA04, MWA6S, T103, TYWE3L, TYWE3S, XR3, WB3, WB3L, WB3N, WB3R, WB3S, WB8, WR3, WR3E, WR3L, WR3N, ZS3L

Read my guide on replacing a compatible module.

Pinout

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

Flashing

Flash using Tasmota Web Installer and select Tasmota ESP32-S2 option.

For esptool.py download i.e. tasmota32s2.factory.bin and run esptool.py write_flash 0x0 tasmota32s2.factory.bin

To put ESP32-S2 in flash mode GPIO0 needs to be pulled low.

You can purchase (AliExpress, Amazon, Banggood) a test board for effortless flashing.

Test Board

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