Shun can LoRa Quick Start Guide

I. Overview

Lora Shun series modules may be Shun Technology is based SX1278 / SX1276 design and development, mainly LoRa ™ remote modem, for ultra-long distance spread spectrum communication, interference is strong, it is possible to minimize current consumption. SEMTECH patented by the modulation LoRa ™, SX1278 having high sensitivity than -148dBm, the output power of + 20dBm, the transmission distance, and high reliability. At the same time, relatively conventional modulation techniques, LoRa ™ modulation techniques in anti-blocking and selection also has obvious advantages, solves the problems of traditional design not take into account distance, interference and power consumption at the same time.

1.1 Product Features

• Supports FSK, GFSK, MSK, GMSK, LoRa ™ and OOK modulation
• Ultra low reception sensitivity of -140 dBm
• It has excellent anti-blocking properties
• Support preamble detection
• SPI supports half-duplex communication
• Packet engine with CRC, up to 256 bytes
• A small volume of SMD package double row of stamps hole

1.2 Selection Table

II. Wiring

2.1 is as follows Ra-01, Ra-01H, Ra-02 test board 51 corresponding to the terminal:

(8 lines of LoRa test board modules, respectively, shown below)

LoRa module	MCU
NSS	CSN
DAWDLE	DAWDLE
MISO	MISO
SCK	SCK
RESET	THIS
DIO0	IRQ
3.3V	VCC
GND	GND

2.2Ra-06 and comes LoRa modulation MCU program, the other MCU may be used to control it by serial AT commands, the wiring as shown below:

three. Burning (test program)

(This test procedure is to use a series of 51 MCU development of reference only test for verification module performance and good purposes, carried out on this program For 2 development, we do not provide the source code written in support)

Example 3.1 firmware burning

示例固件下载地址(https://docs.ai-thinker.com/lora)

测试板烧录方法
1.用串口工具连接51测试板RX,TX,GND,连接方法如下图所示（烧录时请对应相应的单片机型号，此程序对应的单片机为为安信可提供的STC15W408AS型号）。

2.软件下载请到官网上(http://www.stcmcu.com/)下载

3.打开STC-ISP工具，点击检测MCU选项，模块会自动完成软件配置；

4.点击“打开程序文件”，选择MCU的Hex固件，注意输入用户程序运行时的IRC频率为22.1184MHz;

5.点击下载编程后工具会将所选择的固件烧录到单片机里，此时完成下载（注：如果点击监测和下载工具界面无反应，那么请尝试点击以后进行一次复位启动）;

3.2示例固件测试

固件下载完成后，请重新复位测试板。插上LoRa转接板，此测试必须要两块测试板，一块用来发送，另外一块用来接收。当模块上电时不做任何操作，则LoRa模块进入接收模式。当其中一个测试板按下其中一个按键，模块进入发送模式，模块右边的灯会亮起，另外一个模块处于接收模块，如果收到数据，左边的灯会闪烁

按照如图所示在测试板上接入USB转TTL工具打开串口可以收到模块发送的打印信息

四．AT指令

（本次测试基本参数均为出厂默认参数，均采用Ra-06的出厂固件，在测试串口时，需配置串口默认波特率9600，偶校验才能进行数据收发和AT指令测试）
AT 指令采用基于 ASCII 码的命令行，命令格式如下：
请求消息格式为：AT+[OPTION][para, …][\r][\n]。可以不加换行符(\r\n)！

AT指令分为如下几块：
（1）基本执行指令：

（2）系统参数设置指令：

（3）LoRa参数配置设置指令：

（4）数据传输格式指令：

详细的指令语法以及参数调配请参照如下链接中的AT指令文档：
https://docs.ai-thinker.com/_media/ra-06_at_command-20191104.pdf

五．通信测试

（本次测试基本参数均为出厂默认参数，均采用Ra-06的出厂固件，在测试串口时，需配置串口默认波特率9600，偶校验才能进行数据收发和AT指令测试，测试时请加装符合规格参数的天线，否则可能导致数据传输错误或者无法通信）

4.1点对点通信

步骤一（主机）：
AT+ADDR=2 //设置本机主机地址为2
AT+TADDR=3 //设置目标地址为3

步骤二（节点1）：
AT+ADDR=3 //设置本机主机地址为2
AT+TADDR=1 //设置目标地址为1
AT+RECV=1 //接收数据

步骤三（主机）：
AT+MSG=Ai-Tinker //主机发送数据

4.2一对多广播通信测试示例

步骤一（主机）：
AT+ADDR=1 //设置本机主机地址为1
AT+TADDR=65535 //设置目标地址为广播地址

步骤二（节点1）：
AT+ADDR=2 //设置本机主机地址为2
AT+TADDR=1 //设置目标地址为1
AT+RECV=1 //接收数据

Step three (Node 2):
the AT. 3 = ADDR + // set the machine address of the host 2
the AT + = TADDR. 1 // set to the destination address. 1
the AT +. 1 // = the RECV receives data

Step four (host):
the AT + 1234567890 // host sends the MSG = data

contact us

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