如何在柿餅派中用mqtt接收數據并進行解析

1.json數據

{"name":"fyywhy","date":"2021-09-08","data":{"website":"www.rt-thread.org","num1":50,"num2":150,"nice":true,"novel":"當醫生開了外掛","friends":[{"No":1,"name":"樂于助人","skills":"c c++ linux arm stm32"},{"No":2,"name":"樂觀向上","skills":"cad ug photoshop "}]} }

2.壓縮后的json數據

{"name":"fyywhy","date":"2021-09-08","data":{"website":"www.rt-thread.org","num1":50,"num2":150,"nice":true,"novel":"當醫生開了外掛","friends":[{"No":1,"name":"樂于助人","skills":"c c++ linux arm stm32"},{"No":2,"name":"樂觀向上","skills":"cad ug photoshop "}]}}

3.柿餅派中mqtt接收并解析json數據

//監聽MQTT訂閱的消息回調函數，當接收到訂閱的消息，則打印出來 this.client.on("message", function (topic, message) { jsonStr = message.toString("utf8");json_obj = JSON.parse(jsonStr); ? ? console.log("============================================\r\n"); ? console.log("name=" + json_obj.name); ? console.log("date=" + json_obj.date); ? console.log("website=" + json_obj.data.website); ? console.log("num1=" + json_obj.data.num1); ? console.log("num2=" + json_obj.data.num2); ? console.log("nice=" + json_obj.data.nice); ? console.log("novel=" + json_obj.data.novel); ? for(var i=0; i<json_obj.data.friends.length; i++) ? { ? console.log("============================================\r\n"); ? console.log("No" + i + "=" + json_obj.data.friends[i].No); ? console.log("name" + i + "=" + json_obj.data.friends[i].name); ? console.log("skills" + i + "=" + json_obj.data.friends[i].skills); ? } ? console.log("============================================\r\n"); }

4.打印的信息

"============================================ " "name=fyywhy" "date=2021-09-08" "website=www.rt-thread.org" "num1=50" "num2=150" "nice=true" "novel=????????o?¤?" "============================================ " "No0=1" "name0=?1?o???oo" "skills0=c c++ linux arm stm32" "============================================ " "No1=2" "name1=?1è§???" "skills1=cad ug photoshop " ?

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