pc端接收到的mqtt数据<t:byteLength=386.length=386> 怎么转换格式
时间: 2024-06-08 11:10:56 浏览: 13
MQTT协议中的消息体可以是任意的二进制数据。因此,在处理MQTT消息时,需要根据消息内容的具体格式进行解析。
在你提供的消息中,<t:byteLength=386.length=386> 是MQTT的payload的一部分,它表示这个payload的长度为386字节。如果你想将这个payload转换成可读的格式,你需要知道这个payload的具体格式。
例如,如果这个payload是一个JSON格式的数据,你可以使用一个JSON解析器来将它转换成可读的格式。如果这个payload是一个二进制的图片数据,你可以使用一个图片解码器来将它转换成可读的格式。
因此,需要根据具体情况来确定如何解析这个MQTT消息的payload。
相关问题
把这段代码转化为python代码(package service import ( "encoding/json" "errors" "fmt" "gin-syudy/api/device/req" "gin-syudy/define" "gin-syudy/models" "gin-syudy/mqtt" "gin-syudy/tools/resp" "gin-syudy/utils" mq "github.com/eclipse/paho.mqtt.golang" "github.com/gin-gonic/gin" "log" "net/http" "strconv" "time" ) // DeviceController 控制设备 // @BasePath /api/v1 // @Description 启动对应设备 // @Tags 启动设备 // @param identity query string false "Identity" // @param controllerId query string false "controllerId" // @param controlState query string false "controlState" // @Success 200 {object} resp.Response "{"code":200,"data":[...]}" // @Failure 502 {object} resp.Response "{"code":502,"data":[...]}" // @Router /api/v1/device/start [Post] func DeviceController(c *gin.Context) { device := new(models.DeviceBasic) write := new(mqtt.Write) device.Identity = c.Query("identity") id, _ := strconv.Atoi(c.Query("controllerId")) fmt.Println(id) state, _ := strconv.Atoi(c.Query("controllerState")) fmt.Println(state) write.Id = uint32(id) write.State = uint32(state) if device.Identity == "" { resp.RespFail(c, http.StatusBadGateway, errors.New("必填参数为空"), resp.FoundFail) return } deviceBasic := device.GetTopicByIdentity() subTopic := "Device/" + deviceBasic.ItemName + "/" + deviceBasic.BridgeName + "/control" + deviceBasic.Secret fmt.Println(subTopic) sendTopic := "Host/" + deviceBasic.ItemName + "/" + deviceBasic.BridgeName + "/control" + deviceBasic.Secret fmt.Println(sendTopic) dataChan := make(chan *mqtt.StartDataResp, 1) mqtt.SubscribeMessage(subTopic, func(client mq.Client, message mq.Message) { fmt.Printf("MESSAGE : %s\n", message.Payload()) fmt.Printf("TOPIC : %s\n", message.Topic()) subscribeStartData := new(mqtt.StartDataResp) err := json.Unmarshal(message.Payload(), &subscribeStartData) if err != nil { resp.RespFail(c, http.StatusBadGateway, err, "回调函数格式不正确") return } dataChan <- subscribeStartData }) startData := new(mqtt.StartData) startData.SampTime = time.Now().String() startData.CommandID = utils.GetUUid() startData.Write = write data, _ := json.Marshal(startData) err := mqtt.SendMessage(sendTopic, data) if err != nil { resp.RespFail(c, http.StatusBadGateway, err, resp.FoundFail) return } responseMessage := <-dataChan err, _ = mqtt.Unsubscribe(sendTopic) if err != nil { resp.RespFail(c, http.StatusBadGateway, err, "取消订阅失败") return } resp.RespOK(c, responseMessage, "控制成功") })
以下是将给定的 Go 代码翻译为 Python 的代码:
```python
import json
import logging
import time
from http import HTTPStatus
import paho.mqtt.client as mqtt
from flask import jsonify, request
from service.models import DeviceBasic
from service.mqtt import SendMessage, SubscribeMessage, Unsubscribe
from service.tools.resp import RespFail, RespOK
from service.utils import GetUUid
# DeviceController
# 控制设备
# @BasePath /api/v1
# @Description 启动对应设备
# @Tags 启动设备
# @param identity query string false "Identity"
# @param controllerId query string false "controllerId"
# @param controlState query string false "controlState"
# @Success 200 {object} resp.Response "{"code":200,"data":[...]}"
# @Failure 502 {object} resp.Response "{"code":502,"data":[...]}"
# @Router /api/v1/device/start [Post]
def DeviceController():
device = DeviceBasic()
device.identity = request.args.get('identity', '')
id = int(request.args.get('controllerId', 0))
logging.debug(f"id: {id}")
state = int(request.args.get('controllerState', 0))
logging.debug(f"state: {state}")
write = Write()
write.id = id
write.state = state
if not device.identity:
RespFail(HTTPStatus.BAD_GATEWAY, errors=["必填参数为空"])
return
deviceBasic = device.GetTopicByIdentity()
subTopic = f"Device/{deviceBasic.ItemName}/{deviceBasic.BridgeName}/control{deviceBasic.Secret}"
logging.debug(f"subTopic: {subTopic}")
sendTopic = f"Host/{deviceBasic.ItemName}/{deviceBasic.BridgeName}/control{deviceBasic.Secret}"
logging.debug(f"sendTopic: {sendTopic}")
dataChan = []
def on_message(client, userdata, message):
logging.debug(f"MESSAGE : {message.payload}")
logging.debug(f"TOPIC : {message.topic}")
subscribeStartData = mqtt.StartDataResp()
try:
subscribeStartData = json.loads(message.payload)
except json.JSONDecodeError as e:
RespFail(HTTPStatus.BAD_GATEWAY, errors=[f"回调函数格式不正确: {str(e)}"])
return
dataChan.append(subscribeStartData)
mqtt.SubscribeMessage(subTopic, on_message)
startData = mqtt.StartData()
startData.SampTime = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
startData.CommandID = GetUUid()
startData.Write = write
data = json.dumps(startData, default=lambda obj: obj.__dict__, ensure_ascii=False)
err = SendMessage(sendTopic, data.encode())
if err:
RespFail(HTTPStatus.BAD_GATEWAY, errors=[err])
return
responseMessage = dataChan[0]
err = Unsubscribe(sendTopic)
if err:
RespFail(HTTPStatus.BAD_GATEWAY, errors=[f"取消订阅失败: {err}"])
return
RespOK(responseMessage, message="控制成功")
```
def mqtt_connect(self): """连接MQTT服务器""" mqttClient = mqtt.Client(str(uuid.uuid4())) mqttClient.on_connect = self.on_connect # 返回连接状态的回调函数 mqttClient.on_message = self.on_message # 返回订阅消息回调函数 mqttClient.username_pw_set(self.mt_user, self.mt_pwd) # MQTT服务器账号密码 mqttClient.connect(self.mt_ip, 1883, 60) # MQTT地址、端口、心跳间隔(单位为秒) mqttClient.loop_start() # 启用线程连接 return mqttClient def publish(self,msg): mqttClient = self.mqtt_connect() mqttClient.publish() 如何发送信息
要发送信息,您可以使用上面代码中的 `publish` 函数。您需要传递要发送的消息作为参数,例如:
```
msg = "Hello, World!"
self.publish(msg)
```
这将使用 `mqttClient` 对象连接到 MQTT 服务器并发布消息。请注意,您需要确保已经成功连接到服务器并订阅了相应的主题。
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