2pcs 433MHz 20dBm Wireless Transmitter Receiver RS485 Compatible with Smart System

VHF/UHF Radio Modem RS485 Wireless Transceiver 20DBM 433mhz Transmitter and ReceiverWorking 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 16mmRecommend more than 2pcsHow to use:For 2pcs: Module 1 and Module 2 send data to each other.For 3pcs or more: One as master device, the others as slave devices. The working mode is the same as wired RS485 bus. Master device transmits data, all slave devices receive data. Any slave device transmits data, master device and other slave devices can receive. Only one device (master or slave) is allowed to transmit data at any time.Features:1. 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 can be set3. Built-in MCU, communicates with external devices via serial port, sends 31 bytes at a time4. The module supports one-to-one and one-to-many transparent transmission communication through ID setting. Changing the serial port rate will synchronously change the over-the-air data transmission rate, adjustable from 10kbps to 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 sent as normal data, no reserved commands available at this stageApplication:compatible with IP PTZ Cameracompatible with Modbus temperature sensorcompatible with LED Controllercompatible with R4D3C32 N4D8B08 N4D8C12 RS485 Relaycompatible with Remote control and remote measurement systemcompatible with Wireless metercompatible with Home Automation, Wiser Homecompatible with Access controlcompatible with Smart meterColour: blueMaterial: Plastic + MetalPackage Contents:2 * 433M-458M VHF/UHF Radio Modem RS485 transceiver (With shell)