433MHz RS485 Wireless Transceiver 2pcs VHF/UHF Radio Modem Compatible with Smart

VHF/UHF Radio Modem RS485 Wireless Transceiver 20DBM 433mhz Transmitter and Receiver#Basic ParametersWorking voltage: 4.5V-5.5VInterface: RS485(5V GND A+ B-)Frequency: 433MHzTransmit power: -40~+20dBmReceiver sensitivity: -114dBmOperating temperature: -25 Celsius~+75 CelsiusTransparent transmission mode rate: 1200, 2400, 4800, 9600(Default), 19200Open ground transmission distance: 500MSize(without antenna): 74 x 24 x 16mmColour: blueMaterial: Plastic + Metal#Feature1. Long-distance wireless transmission, up to 500M in open area, 10kbps over-the-air rate2. Operating frequency range: 433-458.5MHz, up to 255 communication channels. Maximum 100mW (20dBm) transmit power, 10 levels of power adjustable3. Built-in MCU, communicates with external devices via serial port, sends 31 bytes per transmission4. Supports one-to-one and one-to-many transparent transmission communication through ID setting. Adjusting the serial port rate will synchronously change the over-the-air data transmission rate, adjustable range 10kbps-100kbps5. Critical three minutes setting: The module can send and receive data normally within three minutes of power-on. Send AT command "AT+ENABLE=1" to make the module enter AT state for parameter setting, this is the only reserved command within these three minutes. After three minutes, the module cannot enter AT mode, only supports data sending and receiving, "AT+ENABLE=1" will be transmitted as normal data, no reserved commands are available at this stage#Usage InstructionsPurchase recommendation: 2pcs or moreFor 2pcs: Module 1 and Module 2 send data to each otherFor 3pcs or more: One device acts as master, the rest act as slaves. The working mode is the same as wired RS485 bus. When the master device transmits data, all slave devices receive the data. When any slave device transmits data, the master device and other slave devices can receive the data. Only one device (master or slave) is allowed to transmit data at any time#Application Scenarioscompatible with IP PTZ Cameracompatible with Modbus temperature sensorcompatible with LED Controllercompatible with R4D3C32 RS485 Relaycompatible with N4D8B08 RS485 Relaycompatible with N4D8C12 RS485 RelayRemote control, remote measurement systemWireless meterHome Automation, Wiser HomeAccess controlSmart meter#Package Contents2 * 433M-458M VHF/UHF Radio Modem RS485 transceiver(With shell)