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Sonoff POW R3 25A 5500W Power Monitoring Switch Module
Model reference: POWR3
Sonoff POW R3 25A 5500W

Available from:
Itead.cc
Domadoo.fr
Aliexpress.com


Manufacturer:
Sonoff.tech

Install method:
USB to Serial

GPIO #Component
GPIO00 Button 1
GPIO01 CSE7766 Tx
GPIO02 None
GPIO03 CSE7766 Rx
GPIO04 None
GPIO05 None
GPIO09 None
GPIO10 None
GPIO12 Relay_i 1
GPIO13 Led_i 1
GPIO14 None
GPIO15 ???
GPIO16 ???
GPIO17 ???
Template
{"NAME":"Sonoff POWR3","GPIO":[32,3072,0,3104,0,0,0,0,256,320,0,255,255,255],"FLAG":0,"BASE":43}
For more accurate energy consumption measurements this device requires power monitoring calibration.

Serial Flashing

No soldering required as the headers are present (at least on my unit).

Video instructions by NotEnoughTech