Features:
* Multiple specifications available: RS485, RS232, and USB products differ only in interface; functionality is identical.
* Interoperable and interchangeable. Data can be sent between devices. Long-distance transmission is possible.
* Employs a high-performance wireless transmission solution with excellent signal penetration and anti-interference capabilities. Maintains stable data transmission even in complex electromagnetic environments, effectively reducing packet loss and communication errors, reliability and continuity for long-distance communication.
* Operating frequency bands 433MHz/868MHz are general-purpose unlicensed frequency bands, offering strong versatility, wide coverage, and long transmission distances. Suitable for long-distance data transmission in outdoor and industrial settings, meeting communication needs various distances and environments.
* Supports transparent serial data transmission without modifying existing communication protocols. It can directly replace traditional wired transmission methods, effectively solving problems of difficult and costly cabling, improving equipment layout flexibility and overall construction efficiency.
* Tested in multiple scenarios and over long distances, demonstrating stable communication performance and balanced transmission rates. Widely used in remote monitoring, industrial automation, smart homes, environmental monitoring, and other fields, it is a practical core module in wireless data transmission solutions.

Specifications:
Part Name: Serial Data Transmission Module
Material: ABS
Color: As shown in the picture
Model: RS485 433M, RS485 868M, RS232 433M, RS232 868M, USB 433M, USB 868M (optional)
Operating Voltage: 4.8V-9V (2A power supply recommended)
Interface: RS485/RS232/USB
Frequency: 433MHz/868MHz
Transmit Power: -40~+20dBm
Receive Sensitivity: -114dBm
Operating Temperature: -25℃~+75℃
Transparent Transmission Mode Baud Rate: 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200
Transmission Distance: 500 meters
Size(excluding antenna): 80x50x31 mm
Product Description: (as follows) The RS485, RS232, and USB products have different interfaces but the same function. They can communicate with each other and be used interchangeably. RS485 RS485, RS232 RS232, USB USB.
USB RS485, USB RS232, RS485 RS232. Usage (≥2 modules):
1. Modules 1 and 2 send data to each other.
2. Three modules: Module 1 sends data, Module 2 acts as a repeater (multiple repeaters can be used), and Module 3 receives data; delays the sending and receiving distances.
3. ≥ 3 modules: acts as the master device, and another as a slave device.
They operate in the same way as a wired RS485 bus. The master device sends data, and the slave device receives data. Any slave device can send data, and the master device and other slave devices can receive data. Only device (master or slave) is allowed to send data at any given time.

Package Contents:
1 x Serial Data Transmission Module