Diff: mqtt_laser.py

Revision:

5:48c44bebe8fb

Child:

6:4c80e598d08c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mqtt_laser.py	Mon Jul 23 04:23:25 2018 +0000
@@ -0,0 +1,89 @@
+#!/usr/bin/env python  
+# -*- coding: UTF-8 -*-
+
+'''
+File name:          laser_server_v2.py
+Description:        项目激光部分服务器代码
+Author:             秦智
+Date:               June 4, 2018
+Others:             
+Dependency:         pip install Pillow paho-mqtt
+                    
+'''
+
+from time import sleep
+import paho.mqtt.client as mqtt
+import threading
+import time
+from PIL import Image
+
+
+def waitfile(NumofOnce,minvalue):
+    filename = "laser-6-4.JPG"
+    im = Image.open(filename) #打开图片
+    print("get a picture,the info about filename, im.format, im.size, im.mode:")
+    print(filename, im.format, im.size, im.mode)
+    imL = im.convert("L")
+    x = imL.size[0] #图片的长
+    y = imL.size[1] #图片的宽
+    y=int(y*100/x)
+    x=100
+    imL=imL.resize((x,y)) #缩放图片
+    datalist = [] #存放坐标点的数组
+    for iy in range(0,y):
+        for ix in range(0,x):
+            value = imL.getpixel((ix,iy)) #获取像素亮度
+            if value >=minvalue: #判断阈值
+                datalist.append([ix,iy,value])
+    strdatalist=[]
+    sdata = ""
+    nn=0
+    while len(datalist)>0:
+        data = datalist.pop(0)
+        nn=nn+1
+        # 将坐标转为字符串(x,y,v)
+        sdata = sdata+"("+str(data[0])+","+str(data[1])+","+str(data[2])+")"
+        if nn == NumofOnce or len(datalist)==0:
+            # 构造要发送的字符串数组
+            strdatalist.append(sdata)
+            sdata = ""
+            nn = 0
+    strdatalist.append("(0,0,0)")
+    return strdatalist
+
+def NewWork(conn):
+    datalist = waitfile(5,30)
+    for datastr in datalist:
+        print("senddata:"+datastr)
+        conn.publish('/control/laser/dat', datastr, qos=1)
+        time.sleep(0.01)
+
+def on_message(conn, userdata, msg):
+    print(msg.topic+" "+str(msg.payload))
+    if msg.payload == 'ready.':
+        print('设备已启动')
+        # 告诉设备，有新任务
+        conn.publish('/control/laser/cmd', "1", qos=1)
+    elif msg.payload == 'wait data.':
+        print('等待接收数据')
+        # 调用发送数据函数
+        NewWork(conn)
+        # 告诉设备，数据发送完
+        conn.publish('/control/laser/cmd', "2", qos=1)
+    elif msg.payload == 'received.':
+        print('数据接收完成')
+    elif msg.payload == 'done.':
+        print('任务完成')
+
+def on_connect(client, userdata, flags, rc):
+    print("Connected with result code "+str(rc))
+
+client = mqtt.Client()
+client.on_connect = on_connect
+client.on_message = on_message
+client.connect("tdxls-iot.xicp.net", 1883, 60)
+client.subscribe('/values/laser/report', 1)
+client.loop_start()
+while True:
+    sleep(0.1)
+