How to use call_on_disconnect method in fMBT

Best Python code snippet using fMBT_python

speed_detect_linked.py

Source:speed_detect_linked.py

1# USAGE2# python speed-detect.py -ff <first File> -nf <No of files to be processed>3# import the necessary packages4import pytesseract5import argparse6import cv27import sys8import os9import time10import datetime11import csv12from paho.mqtt import client as mqtt_client13#__________________________GLOBAL VARIABLES_____________________________________________________________________________________________14broker = '103.10.133.104'   #---- -------------- IP Address of server15port = 8081            #------------------------ port number to access server16topic = "live_data"          #------------------- MQTT topic to be published17client_id = 'python-mqtt_data' #----------------- client-ID of code18username = 'surya'    #------------------------ MQTT username19password = 'Mqtt@itc'  #------------------------ MQTT password20Connect_Status = False #------------------------ Flag which sets "True" when connected21prev_time = 0          #------------------------ valriable to store disconnected time 22#__________________________________________________________________________________________________23#-----------------------FUNCTION TO BEE CALLED WHEN DISCONNECTED------------------------------------------------------------------------24   #--(funtion argumeents : bool (True/False))25   #-- whenever disconnected , store the live data into csv file -----26def Call_On_Disconnect(state):27    if(not state):28        "!!!!!!!!!!!!!!!!!!! need to change the file path with that in your PC !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"29        with open('/home/surya/Downloads/IOT-standalone/client_side/cache.csv', 'a') as f_object:  30            writer_object = csv.writer(f_object)31            writer_object.writerow([client_id, frame_speed["S.No"], frame_speed["Time Stamp"], frame_speed["Speed"]])32            f_object.close()33#----------------------------------------------------------------------------------------------------------------------------------------34#-----------------------FUNCTION TO CONNECT TO MQTT SERVER--------------------------------------------------------------------------------35def connect_mqtt():36    #------on_connect() function to be called when connected------------------37    def on_connect(client, userdata, flags, rc):38        global Connect_Status39        if rc == 0:    #---------------------- --RETURN CODE: 0 means connected, Turn Connect_Status to "True"40            print("Connected to Surya's MQTT!")41            Connect_Status = True42        else:43            print("Failed to connect, return code %d\n", rc)44            Connect_Status = False45            global prev_time        #------------when not connected store the time in prev_time46            prev_time = time.time()47    #--------------------------------------------------------------------------48    #------on_disconnect() function to be called when disconnected ------------49    def on_disconnect(client, userdata, rc):50        print("client disconnected")51        global Connect_Status52        Connect_Status = False53        global prev_time54        prev_time = time.time()55        if rc == 0:56            print("Unexpected MQTT disconnection. Will auto-reconnect")57        else:58            print("Failed to connect, return code %d, auto-reconnecting"%rc)                59    #---------------------------------------------------------------------------60    client = mqtt_client.Client(client_id)61    client.username_pw_set(username, password)62    # declare the functions to be called on connection and disconnection63    client.on_connect = on_connect64    client.on_disconnect = on_disconnect65    client.connect(broker, port)66    return client67#--------------------------------------------------------------------------------------------------------------------------------------68#------------------------ FUNCTIO TO PUBLISH DATA TO SERVER ----------------------------------------------------------------------------69def publish(client, client_ID, Serial_no, Time_stamp, Rand_str):70    #print(msg)71    msg = "{'client_id': '%s', 'serial_no': '%s', 'time': '%s', 'value': '%s'}"%(client_ID, Serial_no, Time_stamp, Rand_str)72    result = client.publish(topic, msg)73    # result: [0, 1]74    status = result[0]75    for count in range(0,10):   #------if failed to publish, retry upto 10 times76        if status == 0:77            print(f"Send `{msg}` to topic `{topic}`")78            break79        else:80            print(f"Failed to send message to topic {topic}")81            result = client.publish(topic, str(msg))82            status = result[0]83#-------------------------------------------------------------------------------------------------------------------------------------84def data_cleanup(data):85    data = data.strip("\n\x0c").replace(",", "")86    data = ''.join([i for i in data if i.isdigit()])87    return data88def data_validation(input, lastValue=0):  # using a default value of 089    # flag to check if the value is acceptable or not90    divisionCheck = False91    rangeCheck = False92    # chec for null value93    if input == "":94        print("Null check activated")95        return lastValue96    # speed should be a multiple of 1097    if int(input) % 10 == 0:98        print("Division by 10 dectedted")99        divisionCheck = True100    else:101        print("NO division by 10")102        divisionCheck = False103    # value should be between 0 and 18000104    if int(input) <= 18000 and int(input) >= 0:105        print("speed within limit")106        rangeCheck = True107    else:108        print("speed out of limit")109        rangeCheck = False110    # returning the correct value111    if divisionCheck and rangeCheck:112        print("input returned")113        return input114    else:115        print("last value returned")116        return lastValue117# construct the argument parser and parse the arguments118ap = argparse.ArgumentParser()119ap.add_argument("-ff", "--firstFile", required=True,120                help="name of first input image to be OCR'd")121ap.add_argument("-nf", "--numOfFiles", required=True,122                help="number of images to be OCR'd")123args = vars(ap.parse_args())124# Initializing variables to track no of files processed, OCR data of a frame and overall speed data stored in a dict125file_count = 0126frame_speed = {}127speed_data = []128lastSpeed = 0129#--------------------------- MAIN FUNCTION WHERE IMAGE PROCESSING RUNS ---------------------------------------------------------------130def main_func():131    global file_count132    global frame_speed133    global lastSpeed134    global speed_data135    start_time = datetime.datetime.now()136    # load the input image and convert it from BGR to RGB channel ordering137    read_filename = int(args["firstFile"][0:16]) + file_count138    filename = "{}.jpg".format(str(read_filename).zfill(16))139    print("[INFO] Reading Image No {}. File Name {}".format(file_count, filename))140    image = cv2.imread(filename)141    image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)142    # extract the relevant segment from image carrying the speed data143    frame = image[240:340, 750:940]144    cv2.imshow("frame {}".format(read_filename), frame)145    # frame Pre processing before OCR146    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)147    gray = cv2.GaussianBlur(gray, (3, 3), 0)148    cv2.imshow("gray", gray)149    thresh = cv2.threshold(150        gray, 0, 255, cv2.THRESH_BINARY_INV | cv2.THRESH_OTSU)[1]151    cv2.imshow("thresh {}".format(read_filename), thresh)152    # use Tesseract to OCR the image153    options = "--psm 9"154    ocr_text = pytesseract.image_to_string(frame, config=options)155    # Data cleanup and validation156    speed = data_validation(data_cleanup(ocr_text), lastSpeed)157    # saving for next cycle158    lastSpeed = int(speed)159    cv2.waitKey(0)160    # Preparing data extracted from each frame and then saving it to the dictionary161    frame_speed = {162        "S.No": file_count,163        "Speed": int(speed),164        "Time Stamp": datetime.datetime.now()165    }166    speed_data.append(frame_speed)167    file_count += 1168    # end_time = datetime.datetime.now()169    # elapsed_time = end_time - start_time170    # print(elapsed_time.total_seconds())171   #  print(speed_data)172    print(frame_speed)173# field_names = ['S.No', "Speed", "Time Stamp"]174# Writing data from dictionary to csv file all in one go175# with open('speed.csv', 'w') as csvfile:176#     writer = csv.DictWriter(csvfile, fieldnames=field_names)177#     writer.writeheader()178#     writer.writerows(speed_data)179#------------------------------------------------------------------------------------------------------------------------------------180#---------------------- run() function to execute the whole in loop -----------------------------------------------------------------181def run():182    while(1):183        try:184            client = connect_mqtt()185            client.loop_start()186            while file_count < int(args["numOfFiles"]):187                global prev_time188                #----if disconnected for more than 10sec then restart the connection-----------189                if(((time.time()-prev_time)>10)&(not Connect_Status)):190                    prev_time = time.time()191                    client.loop_stop()192                    client = connect_mqtt()193                    client.loop_start()194                main_func()195                publish(client, client_id, frame_speed["S.No"], frame_speed["Time Stamp"], frame_speed["Speed"])196                if(Connect_Status):197                    print("published file_count: %s"%file_count)198                else:199                    print("failed to publish file_count : %s"%file_count)200                Call_On_Disconnect(Connect_Status)201                time.sleep(1)202                print("-------------------------")203        except Exception as e:204            print(e)205            if(file_count < int(args["numOfFiles"])):206                main_func()207            Call_On_Disconnect(False)208        time.sleep(1)209#-----------------------------------------------------------------------------------------------------------------------------------210if __name__ == '__main__':...

streaming.py

Source:streaming.py

...91                    startTime = datetime.now()92                    self.call_on_frame(frame)93            print("Stream client disconnected", conn.getpeername())94            cv2.destroyAllWindows()95            self.call_on_disconnect()96    def call_on_frame(self, frame):97        self.frameNum += 198        self.lastFrame = frame99        for f in self.on_frame_array:100            f(frame)101    def call_on_disconnect(self):102        for f in self.on_disconnect_array:103            f()104    def on_frame(self):105        def decorator(f):106            self.on_frame_array.append(f)107            return f108        return decorator109    def on_disconnect(self):110        def decorator(f):111            self.on_disconnect_array.append(f)112            return f113        return decorator114class AsyncClient:115    def __init__(self, host, port, usePiCam=False):...

publisher.py

Source:publisher.py

1import random2import time3from paho.mqtt import client as mqtt_client4import csv5import string6from datetime import datetime7#__________________________GLOBAL VARIABLES_____________________________________________________________________________________________8broker = '103.10.133.104'   #------------------------ IP Address of server9port = 8081            #------------------------ port number to access server10topic = "live_data"          #------------------------ MQTT topic to be published11client_id = 'python-mqtt_data' #----------------- client-ID of code12username = 'surya'    #------------------------ MQTT username13password = 'Mqtt@itc'  #------------------------ MQTT password14Connect_Status = False #------------------------ Flag which sets "True" when connected15prev_time = 0          #------------------------ valriable to store disconnected time 16#__________________________________________________________________________________________________17#-----------------------FUNCTION TO BEE CALLED WHEN DISCONNECTED------------------------------------------------------------------------18   #--(funtion argumeents : bool (True/False))19   #-- whenever disconnected , store the live data into csv file -----20def Call_On_Disconnect(state):21    if(not state):22        with open('/home/surya/Downloads/IOT-standalone/client_side/cache.csv', 'a') as f_object:23            writer_object = csv.writer(f_object)24            writer_object.writerow([client_id, i, datetime.now(), val])25            f_object.close()26#----------------------------------------------------------------------------------------------------------------------------------------27#-----------------------FUNCTION TO CONNECT TO MQTT SERVER--------------------------------------------------------------------------------28def connect_mqtt():29    #------on_connect() function to be called when connected------------------30    def on_connect(client, userdata, flags, rc):31        global Connect_Status32        if rc == 0:    #---------------------- --RETURN CODE: 0 means connected, Turn Connect_Status to "True"33            print("Connected to Surya's MQTT!")34            Connect_Status = True35        else:36            print("Failed to connect, return code %d\n", rc)37            Connect_Status = False38            global prev_time        #------------when not connected store the time in prev_time39            prev_time = time.time()40    #--------------------------------------------------------------------------41    #------on_disconnect() function to be called when disconnected ------------42    def on_disconnect(client, userdata, rc):43        print("client disconnected")44        global Connect_Status45        Connect_Status = False46        global prev_time47        prev_time = time.time()48        #print(prev_time)49        if rc == 0:50            print("Unexpected MQTT disconnection. Will auto-reconnect")51        else:52            print("Failed to connect, return code %d, auto-reconnecting"%rc)                53    #---------------------------------------------------------------------------54    client = mqtt_client.Client(client_id)55    client.username_pw_set(username, password)56    # declare the functions to be called on connection and disconnection57    client.on_connect = on_connect58    client.on_disconnect = on_disconnect59    client.connect(broker, port)60    return client61#--------------------------------------------------------------------------------------------------------------------------------------62#------------------------ FUNCTIO TO PUBLISH DATA TO SERVER ----------------------------------------------------------------------------63def publish(client, client_ID, Serial_no, Time_stamp, Rand_str):64    #print(msg)65    msg = "{'client_id': '%s', 'serial_no': '%s', 'time': '%s', 'value': '%s'}"%(client_ID, Serial_no, Time_stamp, Rand_str)66    result = client.publish(topic, msg)67    # result: [0, 1]68    status = result[0]69    for count in range(0,10):   #------if failed to publish, retry upto 10 times70        if status == 0:71            print(f"Send `{msg}` to topic `{topic}`")72            break73        else:74            print(f"Failed to send message to topic {topic}")75            result = client.publish(topic, str(msg))76            status = result[0]77#-------------------------------------------------------------------------------------------------------------------------------------78#--------------------------- MAIN FUNCTION WHERE IMAGE PROCESSING RUNS ---------------------------------------------------------------79i1 = 080i = i181def main_func():82    '''83    .84    .85    MAIN FUNCTION WHERE IMAGE PROCESSING CODE RESITES86    .87    .88    .89    '''90    global i91    global i192    global val93    val = ''.join(random.choices(string.ascii_uppercase + string.digits, k = 8)) #---generate random string94    i1 = i95    i+=196#------------------------------------------------------------------------------------------------------------------------------------97#---------------------- run() function to execute the whole in loop -----------------------------------------------------------------98def run():99    while(1):100        try:101            client = connect_mqtt()102            client.loop_start()103            while(1):104                global prev_time105                #----if disconnected for more than 10sec then restart the connection-----------106                if(((time.time()-prev_time)>10)&(not Connect_Status)):107                    prev_time = time.time()108                    client.loop_stop()109                    client = connect_mqtt()110                    client.loop_start()111                main_func()112                publish(client, client_id, i, datetime.now(), val)113                if(Connect_Status):114                    print("published : %s"%i)115                else:116                    print("failed to publish : %s"%i)117                Call_On_Disconnect(Connect_Status)118                time.sleep(1)119                print("-------------------------")120        except Exception as e:121            print(Connect_Status)122            print(e)123            print(i)124            main_func()125            Call_On_Disconnect(False)126        time.sleep(1)127#-----------------------------------------------------------------------------------------------------------------------------------128if __name__ == '__main__':...

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