This article understands the process from RS485 sensor to IoT gateway to cloud platform

一、概述

There is a need for equipment support at the industrial siteRS485通信,Various collections are possiblePLC、流量计、温湿度、液位等.应用特别广泛,Try to do it in a simpler way here,Let everyone understand the entire data collection process,For more details, please read the relevant manual.

钡铼技术：Focus on industrial IoT gateways,It can collect the vast majority of data standard instruments in the world、PLC、Building equipment, etc,Its selection here is itsBL110Multifunctional protocol IoT gateway.

ThingsPanel：开源物联网平台,免费、快速部署

二、实现功能

A、采集

数值类型：温度、湿度

Switch type：Power outage alarm status、烟感状态

B、控制

开关类型：水泵开关、风机启停

Controls the numeric type：Inverter frequency、Greenhouse shutter opening and closing

三、方案概述

用Modbus slaveSimulate various sensors,Barium Rhenium Industrial GatewayBL110通过Modbus RTU采集、Control various instruments/设备,并通过4G、Internet access via Ethernet,MQTTThe protocol is connected to the open source IoT cloud platformThingsPanel.如下图：

 

Sensor data point parameters

序号	变量名称	设备地址	功能码	寄存器地址	数据类型	变量标签(MQTT标识符名称,自定义)
1	温度	1	04 Input Registers(3x)	0	uint16	temperature
2	湿度	1	04 Input Registers(3x)	1	uint16	humidity
3	Power outage alarm	1	02 Input Status(1x)	0	bool	powerfailure
4	烟感报警	1	02 Input Status(1x)	1	bool	smoke
5	水泵开关	1	01 Coil Status(0x)	0	bool	waterpump
6	风机启停	1	01 Coil Status(0x)	1	bool	fan
7	Inverter frequency	1	03 Holding Register(4x)	0	uint16	frequency
8	Greenhouse Roller Blind	1	03 Holding Register(4x)	1	uint16	rollershutter

四、设置Modbus slave（模拟传感器）

电脑安装Modbus slave,并根据前面“Sensor data point parameters”,设置Modbus slave,Simulate various types of sensors.如下图：

Connection：选择"SerialPort"

Serial Settings：根据实际选择

Mode：选择“RTU”（这里采集的RS485设备,是标准Modbus RTU协议）

串口参数

注意：Modbus slave（模拟传感器）串口参数 need and industrial smart gatewayBL110The serial port parameters are the same

这里设置如下：

项目	参数
波特率	9600
数据位	8
停止位	1
校验码	None

 

 

五、工业网关BL110配置参数

1、接线

①接电源（支持宽电压：9-36v）

②WANThe port network cable is connected to the local area network（可自动分配ip,Other network environment reference manuals）

③RS485接COM2,A接A,B接B

 

2、登录配置软件

打开配置软件→点击“设备搜索”→双击“IP地址”→输入密码,默认123456

注意：Device power on approx30sIt can be searched aroundip

3、设置串口参数

双击COM2,设置串口参数

注意：Here the serial port parameters and the previous settingsModbus slave（模拟传感器）参数一致

模式选择：采集

设备品牌：Modbus设备型号：Modbus_RTU

串口参数

项目	参数
波特率	9600
数据位	8
停止位	1
校验码	None

 

4、Set the sensor address

项目	内容
设备名称	自定义
从站ID	即Modbusof the data points“设备地址”,这里是：1
其他	根据实际情况填写

 

5、Add device data point parameters

序号	变量名称	设备地址	功能码	寄存器地址	数据类型	变量标签(MQTT标识符名称,自定义)
1	温度	1	04 Input Registers(3x)	0	uint16	temperature

添加“温度”Take data points as an example：

项目	内容
变量名称	有自动生成,也可自定义.The setup is demonstrated here“温度”
变量标签	MQTT标识符名称,有自动生成,也可自定义.The setup is demonstrated here“temperature”
地址类型	ModbusThe data point corresponds to the function code.The temperature function code is“04 Input Registers(3x)”
数据类型	根据实际选择.温度是“uint16”
读写类型	根据实际选择.温度是“只读”
地址	即寄存器地址.根据“Sensor data point parameters”规定,温度寄存器地址是：0
添加数量	这里是1,Other types are selected according to the actual situation

 

添加其他数据,并保存

And so on for other data points,然后点“写入配置”,然后重新进入

 

保存后,设备会自动重启,Log back into the configuration software

注意：Device power on approx30sIt can be searched aroundip

 

6、View gateway and sensor communication

点击型号,查看基本信息.See the image below to the right“COM2”,The barium rhenium gateway is andModbus slave（模拟传感器）通信上,“绿色”on behalf of communications.

 

7、Industrial gateways view sensor data

点击“监视”,即可查看到,工业网关BL110The current value of the sensor is collected.如下图,has been collected.跟Modbus slave的一致.

If no data is collected,Please check whether the relevant parameters are set incorrectly and whether the current network environment is normal.

 

 

 8、Connect to the open source IoT cloud platformThingsPanel

对接ThingsPanel平台是通过MQTT协议,设置如下：

项目	内容
IP/域名	根据实际填写.Fill in the demo here：39.98.176.26
端口	根据实际填写.Fill in the demo here：1000
Client ID	根据实际填写.
用户名	根据实际填写.
密码	根据实际填写.
数据模板	选择”KingPigeon“
订阅主题	①“云平台ThingsPanel”控制传感器（开关类型：水泵开关、风机启停;数值类型：Inverter frequency、Greenhouse shutter opening and closing）; ②Then the IoT gatewayBL110Then fill in the subscription topic as：“bl110/001down”,用于接收“云平台ThingsPanel”控制指令.Similar to you following a celebrity Weibo,He publishes news,will be sent to you.
发布主题	①“云平台ThingsPanel”Need to receive barium rhenium industrial gatewayBL110data collected from the sensor,设置订阅主题“bl110/001”; ②Then industrial gatewayBL110Then fill in the release subject as：“bl110/001”
上传周期	根据实际填写.最快1s.

 

前面“写入配置”后,点击型号,可以看到“MQTT Client”和“COM2”Online status has turned green,即BL110The gateway is connected to the cloud platform and the sensor is in communication.

 

9、BL110Smart Gateway Subscription、发布信息格式---KingPigeon模板

发布

{
  "sensorDatas": [
    {
      "flag": "GPS",
      "lat": "0.000000",
      "lng": "0.000000"
    },
    {
      "flag": "signal_strength",
      "value": 0
    },
    {
      "flag": "temperature",
      "value": 30
    },
    {
      "flag": "humidity",
      "value": 68
    },
    {
      "flag": "powerfailure",
      "switcher": 1
    },
    {
      "flag": "smoke",
      "switcher": 0
    },
    {
      "flag": "waterpump",
      "switcher": 1
    },
    {
      "flag": "fan",
      "switcher": 0
    },
    {
      "flag": "frequency",
      "value": 33
    },
    {
      "flag": "rollershutter",
      "value": 55
    }
  ],
  "gateway_indentify": "BeiLai",
  "time": "1658216760",
  "addTime": "2022-07-19 07:46:00",
  "seq": "0.4405.0.0"
}

订阅

A、开关类型.用“switcher”,值

1表示开,true

0表示关.false

{
  "sensorDatas": [
    {
      "switcher": 0,
      "flag": "waterpump"
    }
  ],
  "down": "down"
}

BNumeric type type.用“value”,值

注意：这个数值,需要加双引号

{
  "sensorDatas": [
    {
      "value": "998",
      "flag": "frequency"
    }
  ],
  "down": "down"
}

六、用EMQX的客户端订阅、发布消息

1、Set up the connection to the open source cloud platformThingsPanel的MQTT参数

前面已经设置：工业智能网关BL110Set up the connected open source cloud platformThingsPanel（ip、端口、订阅主题、发布主题）

则EMQXThe client is also set as follows：

 

2、订阅主题：

Subscribe to IoT GatewayBL110data collected from the sensor

3、发布主题：

Turn on the water pump