(serial port Lora module) centrida rf-al42uh private protocol test at instruction test communication process

Xinchida RF-AL42UH module

Xinchida RF-AL42UH Module is based on ASR company ASR6501 The wireless serial port transparent transmission module developed by the chip （UART）, use LoRa agreement , Support Development Gateway signal communication . use 3.3V TTL Level output . The support work is in 400MHz Free band .

LoRa What is it? ？LoRaWAN What is it? ？

1. LoRa yes Long Range（ The long distance ） For short , It's a long distance 、 Low power wireless communication technology ,2009 French company Cycleo An excellent spread spectrum communication algorithm is designed , later , The company was semtech Company purchase , Latter in 2013 Launched in 2013 LoRa chip , at present ,semtech The company is LoRa The only chip supplier .
2. LoRaWAN yes LoRa Wide Area Network（LoRa Wide area network ） For short , Is based on LoRa A communication protocol of technology .
   LoRaWan The protocol architecture mainly includes three levels of communication entities ：

• LoRa terminal
• LoRa gateway
• LoRa The server

Product features : Private agreements Serial transmission module

• Support LoRa Communication protocol of , Data encryption transmission is simple and reliable ;
• -140dBm High receiving sensitivity ,22dbm The transmitting power of , furthest 7km More than urban communication distance ;
• As low as 2.9uA Sleep current , Battery powered , Long endurance guaranteed ;
• 16*16mm Smaller stamp holes SMT encapsulation , Fully save the space for mounting ;
• Built in watchdog , Ensure program operation , Never crash ;  1K Data buffer unit of , Provide enough data cache space ;
• Max. per package 250 byte , Ensure the sending rate of single packet data ;
• Support ASCIII Command debug operation , Meet the requirements of different functional performance , Easy to use ;
• Four mode switching , Meet the power consumption performance requirements under different conditions ;
• Support two data interaction modes of host and node , It can form a star network ;

1. Environmental preparation

1.1 Hardware environment

• Xinchida RF-ASRTB Auxiliary test tools 3 individual
   
  
• Xinchida 433MHz Rubber rod antenna 3 individual
   
  

   
 

1.2 Software preparation

• Upper computer （RF-star_Setting_V0.1）
   
• Serial tools

 

1.3. Document preparation

• Xinchida RF-AL42UH Product manual - Private protocol version
• RF-AL42UH Test specifications - Fixed point transmission

This document is from the official of Sinochem ！ When reading this tutorial , About AT Please refer to this document for a detailed description of the instructions ！

2. Prepare for the test

    2.1 Hardware connection

• Set the module to work in sleep mode , Prepare two DuPont lines corresponding to two lines of different colors below , Connect , Power use 5V Power supply :
  

• take 433MHz The rubber rod antenna is installed RF-ASRTB Plug the auxiliary test tool into the computer USB On the mouth .

 

3. Fixed point transmission

    ① Set up modules 1

1 Set the receiving module 1 The address is 7, The channel is 23, To set module parameters, set the module to work in sleep mode , Connect the two DuPont lines corresponding to the blue and red lines in the figure below to enter the sleep mode ：

 

2. The transmitting module mode is set to fixed-point transmission , The address and channel of the transmitter can be arbitrary , Pictured ：

3. Receiving module 1 The address for 7, The channel is 23.

 

    ② Set up modules 2

4. Set the receiving module 2 The address for 8, The channel is 23

5. After parameter setting, set the working mode of the module to the general mode , The two DuPont lines correspond to the lower blue and red lines respectively , Connect to enter normal mode , Module selection 5V Power supply :

6. The serial port assistant selects the corresponding serial port , And check... In the serial interface ASCII Send and receive ; Pictured ：

 

    ③ Test transmission

7. Enter the specified address in the serial port assistant 00,07,17,szrfstar.com Click Send , You can see that data appears in the serial port assistant of the receiving module 1 at the receiving end ; Pictured ：

 

8. Enter the specified address in the serial port assistant 00,07,17,szrfstar.com Click Send , It can be seen that the serial port assistant of the receiving module 2 at the receiving end does not appear szrfstar.com data ; Pictured :

 

    ④ Point to many

Set the user specified address to... In the serial port assistant FF FF (65535) That is, the broadcast address , Enter in the serial port assistant ：FF,FF,17,szrfstar.com It can be seen that both receiving module 1 and receiving module 2 can receive data ; Pictured ：

   

Xinchida technology 【Vivi】
contact number ：13510534054 （ WeChat ）/17806715121
 
More information plus v Or the official website ：
https://www.szrfstar.com/