b708b47c4b
【主 题】：添加库文件 【描 述】： [原因]： [过程]： [影响]： 【结 束】 # 类型 包含: # feat：新功能（feature） # fix：修补bug # docs：文档（documentation） # style： 格式（不影响代码运行的变动） # refactor：重构（即不是新增功能，也不是修改bug的代码变动） # test：增加测试 # chore：构建过程或辅助工具的变动
44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
/*
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Basic MQTT example with Authentication
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- connects to an MQTT server, providing username
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and password
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- publishes "hello world" to the topic "outTopic"
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- subscribes to the topic "inTopic"
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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#include <PubSubClient.h>
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// Update these with values suitable for your network.
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byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };
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IPAddress ip(172, 16, 0, 100);
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IPAddress server(172, 16, 0, 2);
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void callback(char* topic, byte* payload, unsigned int length) {
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// handle message arrived
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}
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EthernetClient ethClient;
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PubSubClient client(server, 1883, callback, ethClient);
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void setup()
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{
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Ethernet.begin(mac, ip);
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// Note - the default maximum packet size is 128 bytes. If the
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// combined length of clientId, username and password exceed this use the
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// following to increase the buffer size:
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// client.setBufferSize(255);
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if (client.connect("arduinoClient", "testuser", "testpass")) {
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client.publish("outTopic","hello world");
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client.subscribe("inTopic");
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}
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}
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void loop()
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{
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client.loop();
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}
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