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camera.py
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camera.py
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# -*- coding: utf-8 -*-
"""
Created on Mon Apr 16 20:28:47 2018
@author: Rehan Rajput
"""
import time
import paho.mqtt.client as mqtt
import json
import picamera
import requests
import threading
class Values(object):
def __init__(self,cat_url="http://localhost:8000"):
try:
f = open('config','r')
j_data = json.load(f)
self.cat_url = j_data['cat_url']
self.bag_id = j_data['bag_id']
f.close()
except IOError:
self.cat_url =cat_url
self.bag_id = None
print("Warning! No config file found")
self.name = "Camera"+str(self.bag_id)
self.pub = ""
self.sub= ""
self.payload=""
self.broker = ""
self.port = ""
def setVals(self,JSObject):
self.sub = JSObject['cam_sub']
self.pub = JSObject['cam_pub']
self.payload = JSObject['payload']
self.broker = JSObject['broker']
self.port = JSObject['port']
class Publisher(object):
def __init__(self,clientID,values):
self.clientID = clientID
self.mqtt = mqtt.Client(self.clientID,clean_session=False)
self.mqtt.on_connect = self.P_onConnect
self.values = values
def start(self):
self.mqtt.connect(self.values.broker,port =self.values.port)
self.mqtt.loop_start()
def stop(self):
self.mqtt.loop_stop()
self.mqtt.disconnect()
def pub(self,topic,message):
self.mqtt.publish(topic,payload=message,qos=2)
print("Published Message with topic " + str(topic))
def P_onConnect(self, paho_mqtt, userdata, flags, rc):
print("result code is %s" % (rc))
class Subscriber(object):
def __init__(self,clientID,values,cam):
self.clientID = clientID
self.values = values
self.mqtt = mqtt.Client(self.clientID,clean_session=True)
self.mqtt.on_connect = self.S_onConnect
self.mqtt.on_message = self.S_onMessage
self.cam = cam
def start(self):
self.mqtt.connect(self.values.broker,port=self.values.port)
self.mqtt.loop_start()
self.mqtt.subscribe(self.values.sub)
print("Subscribed")
def stop(self):
self.mqtt.loop_stop()
self.mqtt.disconnect()
print("unsubscribed " + self.topic)
def S_onConnect(self, paho_mqtt, userdata, flags, rc):
print ("Connected to message broker with result code: "+str(rc))
def S_onMessage(self, paho_mqtt , userdata, msg):
print ("Topic:'" + msg.topic+"', QoS: '"+str(msg.qos)+"' Message: '"+str(msg.payload) + "'")
m = json.loads(msg.payload)
print("Camera coso has payload %s",m.get("mode"))
if(m.get(self.values.payload)):
print("Taking picture...")
self.cam.capturePic()
class Cam(object):
def __init__(self,values):
self.publisher = Publisher("Pic Publisher",values)
self.publisher.start()
self.i = 1
self.values = values
def capturePic(self):
with picamera.PiCamera() as camera:
camera.start_preview()
time.sleep(2)
camera.capture(str(self.i) + "Image.jpg")
f=open(str(self.i) + "Image.jpg", "rb")
fileContent = f.read()
byteArr = bytearray(fileContent)
f.close()
self.publisher.pub(self.values.pub,byteArr)
self.i = self.i + 1
def end(self):
self.publisher.stop()
class DevRegister(threading.Thread):
def __init__(self,threadID,threadName,values):
threading.Thread.__init__(self)
self.threadID = threadID
self.threadName = threadName
self.values = values
def run(self):
self.starting = True
while self.starting:
body = {"ID":self.values.name,"bag_id":self.values.bag_id}
resp = requests.post(self.values.cat_url+"/dev/",data=json.dumps(body))
print(resp.text)
time.sleep(60)
self.values.setVals(requests.get(self.values.cat_url+"/bag/"+str(self.values.bag_id)).json())
time.sleep(30)
def stop(self):
self.starting = False
print(self.threadName+" ended")
class MainThreadBag(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.values = Values()
resp = requests.get(self.values.cat_url+"/bag/"+str(self.values.bag_id))
print(resp.text)
self.values.setVals(resp.json())
self.cam = Cam(self.values)
self.registrar = DevRegister(90 + 100*self.values.bag_id,"CameraRegistrar"+str(self.values.bag_id),self.values)
self.sub = Subscriber("Subscriber" + str(self.values.bag_id),self.values,self.cam)
def run(self):
self.registrar.start()
self.sub.start()
self.running = True
while self.running:
pass
def stop(self):
self.running = False
self.registrar.stop()
self.sub.stop()
self.cam.end()
if __name__ == "__main__":
FatherThread = MainThreadBag()
FatherThread.start()
try:
while True:
pass
except KeyboardInterrupt:
FatherThread.stop()