SPECIFICATIONS

Module characteristics

1. all the chips we guarantee are new original imported industrial chips, ultra-long distance transmission up to thousands of meters.

2. with RXD, TXD, power three LED indicator, serial input protection;

3. the chip has a swing rate limiting driver, minimize EMI, and reduce signal reflection caused by improper terminal matching cables, so that error-free signal transmission rate of up to 500Kbps.

4. with 1/4 unit load receiver input impedance, support multi-machine communication, allowing connection to a maximum of 128 devices on the bus.

5. industrial chip operating temperature can reach -40℃ to +85℃.

6. This module can be hot-swappable, will not appear other 485 chip hot-swappable signal plug phenomenon.

7. with 120Ω terminal resistance (line length more than 200 meters, more stable, reduce bit error rate);

8. the use of transient suppression TVS 600W diode, overvoltage protection performance is better;

9. the use of 10Ω current protection resistance, patch design to improve 485 signal integrity;

10. RS485, TTL signal all single-sided wiring, to ensure signal quality, improve signal integrity;

11. large area of copper, to prevent signal interference;

12. support for multiple baud rate: 300/600/1200/2400/19200/38400/57600/115200/230400/460800/921600/4800/9600, etc;Note:

1. For Android phones, make sure your model supports otg, as more than 90 percent of the new mainstream Android phones have otg.

2. Provide android source code and apk file, and use the new version of android studio compilation, but also provide Eclipse project, if the compilation error, please make your own 100 error keyword, basically are configuration or gradle problems, the project directory must not contain Chinese characters, responsible for as easy to report errors!

3. Use Android serial debugging tool to test the development board, only need to connect to the debug serial port of the development board, saving the inconvenience of having to use the computer (web disk to provide download), the coding is adjustable, support Chinese!