PSF-B-3C Ultra Low Power ESP8285 Wi-Fi Switch Module


1 in stock

【ESP8285 Chip】 Ultra-low-power Wi-Fi switch module series based on ESP8285.
【4 Gang Switch Control】Used as a switch control for 1-4 household appliances. Either it can be controlled by the device button, or remotely controlled by connecting to APP (eWeLink)
【Specially designed for mobile devices and Internet of Things applicationsl】With the most competitive package size and ultra-low energy consumption technology in the industry. PSF-B series connect users’ devices to the Wi-Fi wireless network for remote or local area network communication to achieve networking.
【Various packaging methods】Widely used in smart grid, smart transportation, smart home, handheld devices, industrial control and other fields.

211.00 600.00

1 in stock

Key Features:

  • Built-in 32bit MCU, and can double as an application processor
  • Support wireless 802.11 b/g/n standard
  • Wi-Fi @2.4 GHz, support WPA/WPA2 security mode
  • +20.5dBm maximum output power in 802.11b mode
  • Support device button control and Wi-Fi remote control
    a)In the normal state: click the button (IO0 pulls down for more than 100ms) to control the relay on and off (IO12 output high/low level

b)In the pairing mode: click the button to exit the pairing mode.

  • Support timer schedule – including single, count down, repeat, and loop timer, see details in 4.5.
  • Support compatible pairing mode /quick pairing mode
  • Power-on status -The power-on switch status can be configured on or off through the APP, and the default power-on status is off.
  • Support OTA upgrade

Electrical Characteristics

1.Rated parameters

  • Conditions: VDD=3.3V±10% , GND=0V; test at room temperature 25°C.
  • Operating Voltage: 2.7V~3.6V
  • GPIO drive capability: Max: 12mA
  • Working current: Average current: ≈80mA ,
  • Maximum working current: 210mA
  • Standby: <200uA
  • Operating temperature: 0℃~45℃
  • Storage condition: Temperature: -10℃~75℃ ,
  • Relative humidity: 20%RH~80%RH
  • Wireless network type: STA/AP/STA+AP
  • Encryption mechanism: WEP/WPA-PSK/WPA2-PSK
  • Encryption type: WEP64/WEP128/TKIP/AES
  • Firmware upgrade:OTA remote upgrade

2. Wi-Fi parameters

  • Conditions: VDD=3.3V±10% , GND=0V ; test at room temperature 25°C.
  • Wireless standard: IEEE 802.11b/g/n
  • Frequency range: 2.412GHz-2.484GHz
  • Transmit power:
  • 802.11b: 20±2dBm (@11Mbps)
  • 802.11g: 17±2dBm (@54Mbps)
  • 802.11n: 14±2dBm (@HT 20, MCS 7)
  • Receiving sensitivity:
  • 802.11b: -91 dBm (@11 Mbps, CCK)
  • 802.11g: -75 dBm (@54Mbps, OFDM)
  • 802.11n: -72 dBm (MCS7)
  • Antenna type:Ceramic patch antenna

Tips: If you want to know detailed product features, WIFI radio frequency marking, PCB design, package information, module type and pin definition, please see the product application guide.

Single Gang: https://itead.cc/diy-kits-guides/psf-b01-application-guide/

Multi-Gang: https://itead.cc/diy-kits-guides/psf-b04-application-guide/


SKU: 6920075777024 Category:
Weight 0.058 kg


Additional information

Model PSF-B-3C
Main chip ESP8285
Hardware interface UART, GPIO


Does this product checked before shipping them to me?

Yes., of course.We have a professional Quality Control team. They will check carefully for each item we received from factory to avoid sending defective goods to our customers.

If a item is found defective in our Technical QC  team , it will be returned to the factory. Please don’t worry about receiving a defective item because we are committed to being a trustworthy

Products Guaranteed

Factories that supply Sonoff are strictly evaluated by us, and we provide you an even better reassurance of consistent  high quality thanks to our Sonoff Technical QC team. We double-check the contents of all orders carefully before dispatch to our customers a. Sonoff will maintain all product serial number and products ID for stop delicacy.

Lead time

Processing time 1-2 business days normally: During this period, we do strict quality-control tests and get the items carefully packed.

Delivery time

Delivery time 3-8 business days normally in India.

 Who will be delivered the product to me

You order  will dispatch from your nearest local authorized dealer by ShipRocket/Delhivery.com.

What should I do if my items arrived damaged?

When using shipping services, we want the delivery to be as fast as possible. At the same time, we expect from the courier company to handle our shipments with great care throughout their journey. Packages reach several depots and go through multiple hands until the driver delivers them to their recipients. Even though we might assume it is the courier’s fault for the damaged delivery of the parcel, several other situations explain it is not always the case.

If you order got damaged or lost during transits so  Rarely, rough handling by the courier can lead to physical damage to your goods, e.g. broken screen. In this condition, Apply for Insurance claim terms & conditions applicable.

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