Arduino网络编程实战-ADC数据可视化(仪表) ADC数据可视化(仪表) Arduino Ethernet Shield V1 允许 Arduino 板连接到互联网。 它基于 Wiznet W5100ethernet 芯片(数据表)。 Wiznet W5100 提供支持 TCP 和 UDP 的网络 (IP) 堆栈。 它最多支持四个同时套接字连接。
将物联设备采集的数据进行可视化,有助于对数据的理解以便对决策做出相应的支持。本次实例将结合Electron、echarts、JQuery、MQTT数据传输协议实现对ADC设备采集的数据仪表方式可视化处理。
1、硬件准备
Arduino Mega 2560
Arduino Ethernet Shield
路由器(推荐可以上网、开启DHCP)
网线一条
电脑一台
电位计模块一个
2、软件准备
在Nodejs安装完成后,需要安装一些支持库,在命令行中运行 npm -g install node-gyp nan debug
3、Electron端代码实现 Electron代码与前面文章:
下面只给主要代码(renderer.js):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 const host = '127.0.0.1' const port = 1883 const clientId = 'mqtt\_arduino\_client' const connectUrl = `mqtt://${host}:${port}` const topic = '/arduino/temperature' const client = mqtt.connect(connectUrl,{ clientId, clean:true, connectTimeout:4000, reconnectPeriod:1000 }) var myChart = echarts.init($('#adc-main')[0]); var counts = 0; var datas = [] // 指定图表的配置项和数据 chart_option = { title: { text: 'ADC数据采集-压力' }, tooltip: { formatter: '{a} <br/>{b} : {c}%' }, series: [ { name: 'Pressure', type: 'gauge', detail: { formatter: '{value}' }, data: [ { value: 50, name: '压力' } ] } ] }; // 使用刚指定的配置项和数据显示图表。 myChart.setOption(chart_option); function refreshChart(payload){ let datas = [{ name:'Score', value:payload.toString() }] // 更新表格数据 //chart\_option.series.data = datas myChart.setOption({ series:[{ name:'压力', data:datas}] }) } client.on('connect',()=>{ console.log('Connected') client.subscribe([topic],()=>{ console.log(`Subscribe to topic ${topic}`) }); }); client.on('message',(topic,payload)=>{ console.log('Received Message:',topic,payload.toString()) refreshChart(payload) });
4、Aruduino数据采集实现代码 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 #include <SPI.h> #include <Ethernet.h> #include <PubSubClient.h> #define ADC\_PIN 2 #define USE\_STATIC 0 byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; #if USE\_STATIC IPAddress ip(192, 168, 2, 177); #endif void callback(char\* topic, byte\* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); for (int i=0;i<length;i++) { Serial.print((char)payload[i]); } Serial.println(); } EthernetClient ethClient; PubSubClient client(ethClient); IPAddress serverIP(192, 168, 2, 190); void reconnect() { // Loop until we're reconnected while (!client.connected()) { Serial.print("Attempting MQTT connection..."); // Attempt to connect if (client.connect("arduinoClient")) { Serial.println("connected"); } else { Serial.print("failed, rc="); Serial.print(client.state()); Serial.println(" try again in 5 seconds"); // Wait 5 seconds before retrying delay(5000); } } } void setup() { Serial.begin(9600); Serial.println("Ethernet MQTT Client Example"); pinMode(ADC_PIN,INPUT); #if USE\_STATIC Ethernet.begin(mac,ip); #else Ethernet.begin(mac); #endif if (Ethernet.hardwareStatus() == EthernetNoHardware) { Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); while (true) { delay(1); } } if (Ethernet.linkStatus() == LinkOFF) { Serial.println("Ethernet cable is not connected."); while(true){ delay(1); } } Serial.print("IP:"); Serial.println(Ethernet.localIP()); Serial.print("Subnet Mask:"); Serial.println(Ethernet.subnetMask()); Serial.print("Gateway:"); Serial.println(Ethernet.gatewayIP()); Serial.print("DNS Server:"); Serial.println(Ethernet.dnsServerIP()); client.setServer(serverIP, 1883); client.setCallback(callback); } void loop() { if (!client.connected()) { reconnect(); } client.loop(); // 读取ADC值 int value = analogRead(ADC_PIN); String datas = String("") + value; // 发送ADC数据 client.publish("/arduino/temperature",datas.c\_str()); Serial.print("send:"); Serial.println(datas); delay(1000); }
5、运行结果
文章来源: https://iotsmart.blog.csdn.net/article/details/123121427
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