2pcs Wireless Transceiver 20dbm 433MHz RS485 VHF/UHF Radio Modem Transmitter Receiver Compatible with Smart

Product Name: VHF/UHF Radio Modem RS485 Wireless Transceiver 20DBM 433mhz Transmitter and Receiver Working voltage: 4.5V-5.5V Interface : RS485(5V GND A+ B-) Frequency: 433MHz Transmit power: -40~+20dBm Receiver sensitivity: -114dBm Operating temperature: -25 Celsius~+75 Celsius Transparent transmission mode rate :1200,2400,4800,9600(Default),19200 Open ground Transmission distance : 500M Size(without antenna): 74 x 24 x 16mm Long-distance wireless transmission (up to 500 in open area , 10kbps rate in the air ). Operating frequency range ( 433 - 458.5MHz , up to 255 communication channels). Maximum 100mW ( 20dBm ) transmit power ( 10 levels of power can be set ). Built-in MCU, use serial port to communicate with external devices. Send 31 bytes at a time. The module can support one-to-one, one-to-many transparent transmission communication through ID setting. Changing the rate of a different serial port will synchronously change the rate at which data is sent over the air. ( 10kbps-100kbps) Set the 'critical three minutes'. The module can send and receive data normally within three minutes of power-on. You can send the AT ' AT+ENABLE=1 ' to make the module enter the AT state for parameter setting. There is only this reserved word in these three minutes. After more than three minutes, you will not be able to enter the AT mode, you can only send and receive data, ' AT+ENABLE=1' will also be sent out as data, there are no reserved words at this time. Recommend to use more than 2pcs How to use (≥2pcs): 1/ 2PCS, Module 1 and Module 2 send data to each other. 2/ ≥3PCS, One as master device, the others as slave devices. The way they work is as wired RS485 bus. Master device transmits data, Slave devices all receive data. Any slave device transmits data, master device and the other slave devices can receive. Only one device (master or slave) is allowed to transmit data at any time. Application: IP PTZ Camera Modbus temperature sensor LED Controller R4D3C32 N4D8B08 N4D8C12 RS485 Relay Remote control, remote measurement system Wireless meter Home Automation, Wiser Home Access control Smart meter Colour: blue Material: Plastic + Metal Package Contents: 2 * 433M-458M VHF/UHF Radio Modem RS485 transceiver(With shell)