1. Long-distance wireless transmission (up to 500 meters in open area, 10kbps air speed).

2. Working frequency range (433 - 458.5 MHz, up to 255 communication channels). Maximum 100mW (20dBm) transmit power (10 power levels can be set).

3. Built-in MCU, use serial port to communicate with external devices. Send 31 bytes at a time.

4. The module can support one-to-one, one-to-many transparent transmission communication through ID setting. Changing the rate of another serial port will synchronously change the rate at which data is sent over the air. (10kbps-100kbps)

5. Set 'critical three minutes'. The module can send and receive data normally within three minutes after power-on. You can send AT 'AT+ENABLE=1' to make the module enter AT mode for parameter setting. There is only this reserved word during these three minutes. After more than three minutes, you will not be able to enter 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.

Product name: VHF/UHF Radio Modem RS485 Wireless Transmitter/Receiver 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;

Working temperature: -25 Celsius~+75 Celsius;

Transparent transmission mode Speed: 1200 2400,4800,9600(Default),19200;

Open ground transmission distance: 500M

Size (without antenna): 74 x 24 x 16mm

Recommended for more than 2 pcs

How to use (more than =2 pcs):

1/2 pcs, Module 1 and Module 2 send data to each other.

2 more than =3 pcs, One as master unit, the other will be as slave unit.

The way they work as a wired RS485 bus. The master unit sends data, the slave units receive all data. All slave units send data, the master unit and the other slave units can receive. At any time, only one device (master or slave) is allowed to send data.

Application:

IP PTZ camera

Modbus Modbus Temperature sensor

LED controller

R4D3C32 N4D8B08 N4D8C12 RS485 Relay

Remote control, Remote control system;

Wireless meter;

Home automation, Smarter home;

Access control;

Smart meter

Color: Blue

Material: Plastic + Metal

Package contents:

2 * 433M-458M VHF/UHF Radio Modem RS485 Transmitter/Receiver (with shell)

Only the above package content, others are not included.

Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.