PSA Smart Switch Module

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PSx Module is a high integration and general-purpose smart switch module. It’s based on esp8266, designed for wifi socket and wifi switch. With peripheral circuit like external power supply, relay, button, customers can make use of this module to develop and produce smart socket or smart switch without any coding.

Go shopping PSA Smart Switch Module(SKU:IM150310002)


  • Support easy configure SSID and wifi password through phone APP
  • Support auto-connecting to IoTgo server, register product and update status
  • Support remote monitor and control by phone APP
  • Support setting timing task by phone APP (once or repeat is optional)


PCB Size 22.86 x 20.32 x 1.0mm
Power supply 3.3V

Electrical Characteristics

Characteristics Symbol Min Typ Max Unit
Power supply voltage VDD 3 3.3 3.5 V
High input voltage VIH 0.8XVDD - VDD V
Low input voltage VIL 0 - 0.2XVDD V
Operation current for VDD IDD - - 215 mA

Pin Map

Pin Index Pin Name Description
1 NC No connection
2 RELAY Connect to relay. To turn on and off the switch.
3 SLED Net Status Indicators
Stay ON – normal work
Repeat ON 100ms, OFF 1900ms – cannot connect to WiFi spot
Repeat ON 100ms, OFF 100ms, ON 100ms, OFF 1700ms - cannot connect to server
Repeat ON 1000ms, OFF 1000ms – device connects to server, but doesn’t register to the corresponding account in server
Repeat ON 200ms, OFF 200ms – enter into SSID configuration mode
4 NC No connection
5 KEY Local switch button - use for turning on and off the socket or switch
Take effect when Low, default input is High
Long press (more than 5s), enter into the configure mode
Change the status of switch by pressing the local button
6 3V3 Module power pin
7 NC No connection
8 NC No connection
9 GND Module power pin
10 NC No connection


PSA-hardware.png PSA-PinMap.png

Support APP

  • eWeLink iOS version (App Store)
  • eWelink Android version (Google Play)






Grant of Equipment Authorization Certificate-PSA