Forrinx 3AC 4USB Power Strip (SH-20UK)
Forrinx 3AC 4USB

Available from:


Install method:
USB to Serial

GPIO #Component
GPIO00 None
GPIO01 Led_i 1
GPIO02 None
GPIO03 Led_i 2
GPIO04 Relay 2
GPIO05 Relay 1
GPIO09 None
GPIO10 None
GPIO12 Button 1
GPIO13 Relay 3
GPIO14 Relay 4
GPIO15 None
GPIO16 None
GPIO17 None

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.