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PSB-04 is a 4 gang IoT development WiFi module for DIY smart home solution. It easily turns traditional switch/socket into WiFi control smart switch/socket.

PSB-04: ESP8266 based 4-Channel Smart Switch Module for Home Automation Devices

Model: IM150515008
PSB Module is a high integration and general-purpose 4 channel (4-gang) smart switch module. It’s based on esp8266, designed for WIFI socket and WIFI switch. It acts like a transfer station which can receive and transfer messages via WIFI.

Product Description



PSB Module is a high integration and general-purpose 4 channel (4-gang) IoT development smart switch module. The WiFi IoT module is based on esp8266, designed for wifi socket and wifi switch. It acts like a transfer station which can receive and transfer messages via WIFI. It's a great IoT solution for DIY smart home.

The IoT module has peripheral components such as external power supply, relay, button. Therefore, customers can make use of this module to develop smart socket or smart switch without the need for any coding. Simply add it to your traditional socket/switch, they will become smart and can be remotely controlled by  APP eWeLink, which is available on both iOS and android. 

To develop a smart product, customers only need to add a few components to the circuit. Cloud server, APP, PSB module are already there. 

Customers can add PSx (PSB/PSA) module to their devices to make them WIFI controlled devices instantly, without any coding. It is a perfect fit for home appliances manufacturers.


Successful Case


PCB Size29.21*20.32*1.00mm
Power supply 3.3V
Power supply(limits) 3.6V DC(MAX)

Electrical Characteristics

Power supply voltage VDD 3.0 3.3 3.6 V
Output High Voltage (IOH = -10 mA) - VDD-0.8 - V
High input voltage VIH 2.0 - VDD V
Low input voltage VIL 0 - 0.8 V
Operation current for VDD IDD - - 280 mA

Cloud Support

  • Cookit Cloud

APP Support

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

Product Advantages

Minimum System

PSB Demo Schematic



Please visit our wiki page for more information about this product. Any suggestions for improvement, such as correcting errors, adding more demo codes or tutorials, will be highly appreciated.

Technical support

For technical support, please open a ticket on Itead Support System.

Additional Information

Additional Information

Discontinued Yes
Link Wiki
EWeLink Support Yes
Module Type No
Weight 2.5 g
Model IM150515008
Board Size 29.2mm*20.3mm*3mm
Version b04-gl
Operation Level Digital 3.3V


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