Merkury Innovations 4 Outlets Plug (MI-WW119-199W)
Merkury Innovations 4 Outlets

Available from:

Install method:
USB to Serial

GPIO #Component
GPIO00 Led1i
GPIO01 Serial Tx
GPIO02 None
GPIO03 Serial Rx
GPIO04 Relay2
GPIO05 Button1
GPIO09 None
GPIO10 None
GPIO12 Relay1
GPIO13 Relay3
GPIO14 Relay4
GPIO15 None
GPIO16 None
Configuration (old format, will be converted to new template when applied)

Could not be flashed with tuya-convert as of Nov 1 2020.

VCC and ground available on opposite sides of shorter segment of module sticking through main board when attached. VCC is the wider solder joint and ground is the 1st pad on opposite side. TX and RX available on top edge of module closest pins to the antenna. GND and D0 are available opposite end of top edge, last pad and 4th pad.

Device with date code (?) sticker on bottom of box with 14872 possibly was an earlier revision than a device with a 15790 sticker. That device had more solid plastic framework around internal contacts and was easier to access bottom of board by removing a single screw.