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Sonoff Smart Stackable Power Meter DIN Relay (SPM)
Sonoff Smart Stackable Power Meter

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


Manufacturer:
Sonoff.tech

Install method:
USB to Serial

GPIO #Component
GPIO00 None
GPIO01 None
GPIO02 None
GPIO03 None
GPIO04 Serial Tx
GPIO05 ETH POWER
GPIO09 None
GPIO10 None
GPIO12 SPI MISO
GPIO13 SPI MOSI
GPIO14 SPI CLK
GPIO15 None
GPIO16 Serial Rx
GPIO17 None
GPIO18 ETH MDIO
GPIO19 None
GPIO20 None
GPIO21 None
GPIO22 None
GPIO23 ETH MDC
GPIO24 None
GPIO25 None
GPIO26 None
GPIO27 None
GPIO6 None
GPIO7 None
GPIO8 None
GPIO11 None
GPIO32 LedLink
GPIO33 None
GPIO34 None
GPIO35 Button 1
GPIO36 None
GPIO37 None
GPIO38 None
GPIO39 None
Configuration for ESP32
{"NAME":"Sonoff SPM","GPIO":[0,0,0,0,3200,5536,0,0,672,704,736,0,3232,0,5600,0,0,0,0,5568,0,0,0,0,0,0,0,0,544,0,0,32,0,0,0,0],"FLAG":0,"BASE":1}

Auto-configuration

After flashing Tasmota, open the web UI of the device and navigate to Configuration -> Auto-configuration. Select your device from the drop-down and click Apply Configuration.
The device will restart and will be automagically configured.

Use code BLAKADDER10 when buying from mediarath.de Tasmota category for a 10% discount. Code is valid until end of 2022.

All required pins for serial flashing are available and labelled!

PCB

See GitHub Discussion and Documentation for more info…

webUI