2 RS485 20 dBm 433 MHz wireless transceivers. VHF/UHF radio modem for smart devices

1. Long-range wireless transmission (up to 500 m in open field, 10 kbit/s data rate). 2. Operating frequency range: 433 to 458.5 MHz, up to 255 communication channels. Maximum transmission power: 100 mW (20 dBm), adjustable in 10 levels. 3. Integrated microcontroller; communication with external devices via the serial port. Transmission of 31 bytes per packet. 4. Transparent one-to-one or one-to-many communication through identifier configuration. Changing the serial port data rate results in a synchronous change in the transmission rate (10 to 100 kbit/s). 5. Three-minute critical delay: the module operates normally for three minutes after power-up. You can send the AT command ''AT+ENABLE=1'' to put the module into AT mode for device configuration. This keyword is the only one available for these three minutes. After three minutes, you will no longer be able to access AT mode. You will only be able to send and receive data. The command "AT+ENABLE=1" will also be transmitted. No keywords are reserved at this time. Product Name: VHF/UHF RS485 Radio Modem Wireless Transceiver 20 dBm 433 MHz Operating Voltage: 4.5 V - 5.5 V; Interface: RS485 (5 V GND A+ B-) Frequency: 433 MHz Transmit Power: -40 dBm to +20 dBm; Receiver Sensitivity: -114 dBm; Operating Temperature: -25 °C to +75 °C; Transmit Rate in Transparency Mode: 1200, 2400, 4800, 9600 (default), 19200 bpm; Range in Open Field: 500 m; Dimensions (without antenna): 74 x 24 x 16 mm. Recommended for 2 or more units. Usage (more than 2 units): 1 or 2 units: Modules 1 and 2 communicate with each other. 2 or more units (3 units): One master module and one slave module. Operation is similar to a wired RS485 bus. The master device transmits data; the slave devices receive it. When a slave device transmits data, the master device and the other slave devices can receive it. Only one device (master or slave) can be authorized to transmit data at a time. Applications: PTZ IP camera, Modbus temperature sensor, LED controller, RS485 relay, R4D3C32, N4D8B08, N4D8C12, remote control, remote measurement system, wireless meter, home automation, access control. Smart Meter Color: Blue Materials: Plastic and metal Package contents: 2 VHF/UHF 433-458 MHz RS485 radio modems (with housing) Only the above-mentioned contents are included. Note: The item's color may slightly differ from the actual product due to lighting and your monitor settings. The measurement error margin is +/- 1 to 3 cm.