Forrinx 3AC 4USB Power Strip
Model reference: SH-20UK
Forrinx 3AC 4USB

Available from:


Flashed with:
Serial port

GPIO #Component
GPIO00 None
GPIO01 Led1i
GPIO02 None
GPIO03 Led2i
GPIO04 Relay2
GPIO05 Relay1
GPIO09 None
GPIO10 None
GPIO12 Button1
GPIO13 Relay3
GPIO14 Relay4
GPIO15 None
GPIO16 None
ADC0 None
Template for Tasmota v9.1+

Disassemble the unit (a few screws, back pops off) to do the flash. Screws on the back (under the white pads).

Once disassembled, un-solder the TYWE2S module from the power board to flash it with Tasmotizer. The GPIO 0 pin that needs to be pulled to ground on powerup is not accessible via the module, but can be accessed via test point I00 on the back of the module. Unfortunately, visibility and access are blocked by USB socket, so out it came. Once on its own I had no trouble flashing it over serial, and it went back in & was soldered up quite easily.

Relays 1 - 3 controlling the sockets, starting with Relay 1 nearest to the power cable and Relay 4 controlling the USB sockets.