Sonoff PSF-B Series - User Manual

PSF-B04 Application Guide
1.Product Introduction
PSF-B04 is a 4-channel ultra-low-power Wi-Fi switch module based on ESP8285. It’s
specially designed for mobile devices and Internet of Things applications with the most
competitive package size and ultra-low energy consumption technology in the industry.
Connecting users’ devices to the Wi-Fi wireless network for remote or local area network
communication to achieve networking. This module can be used as a switch control for 4
household appliances. Either it can be controlled by the device button, or remotely
controlled by connecting to APP (eWeLink).
PSF-B04 has various packaging methods, and the antenna supports ceramic
antennas. It can be widely used in smart grid, smart transportation, smart home,
handheld devices, industrial control and other fields.
Product 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 outputpower in 802.11b mode
• Support devicebutton control
• Support timer schedule
• Support Wi-Fi remote control
• Support compatible pairing mode /quickpairing mode
• Support OTA upgrade
2.Electrical Characteristics
2.1 Rated parameters
Conditions: VDD=3.3V±10% , GND=0V; test at room temperature 25°C.
Type
Parameters
Model
PSF-B04
Main chip
ESP8285
Hardware interface
UART, GPIO
Operating Voltage
2.7V~3.6V

Sonoff PSF-B Series Specifications

General

Category	Wireless Router
Wireless Standards	IEEE 802.11 b/g/n
Frequency Band	2.4 GHz
Maximum Speed	300 Mbps
Model	PSF-B Series
Antenna	2 x External Antennas
Operating Temperature	0°C - 40°C
Operating Humidity	10% - 90% RH (non-condensing)

Summary

Product Introduction

Electrical Characteristics

Rated Parameters

Specifies electrical parameters including voltage, main chip, and hardware interfaces.

Wi-Fi Parameters

Details Wi-Fi standards, security modes, frequency range, and transmit/receive sensitivity.

Module Type and Pin Definition

Module Type

Presents the top view diagram of the PSF-B04 module.

Pin Arrangement Sequence

Describes the sequence and functional description of the module pins.

Pin Definition

Provides detailed pinout and function descriptions for each specific pin.

Function Description

Module Functionality

Explains the 4-channel switch functionality, local and remote control via APP.

Wi-Fi Status Indicator Light

Describes Wi-Fi status light patterns and their respective network working status meanings.

Wi-Fi Module Basic Workflow

Outlines the basic workflow for Wi-Fi module configuration and connection to the server.

Timer Function

Details the timer function capabilities and provides descriptions for different timer modes.

Wi-Fi Radio Frequency Index

Sensitivity

Lists sensitivity values for various Wi-Fi standards and data rates.

Adjacent Frequency Suppression

Provides data on adjacent frequency suppression performance for different modulations.

PCB Design

Packaging Information