gat.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Do not execute directly.
Please execute gateway_http_uplink.py
Created on Mon Oct 19 2021
@author: ALKADRI Mohammad
"""
from gateway_http_downlink import Downlink
from Endpoint import Endpoint
import time
from datetime import datetime
import os
import json
import base64
import numpy as np
import threading
import socket
import struct
sema=threading.Semaphore(value=0)
sema2=threading.Semaphore(value=0)
APIKey = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhcGlfa2V5X2lkIjoiYzA2ZGY1MDMtNjE5Zi00ZjI2LTgxNzEtYTU0OTRmMWJmYmRmIiwiYXVkIjoiYXMiLCJpc3MiOiJhcyIsIm5iZiI6MTYyMjY1MzMzMSwic3ViIjoiYXBpX2tleSJ9.23eLyvgd5zheP9hDM0acCAl9ojhQjLTZAU77IKqhvQY'
server = 'localhost:8080'
#just defining an instance to be used
downlink = Downlink(server, APIKey)
directory = '/home/pi/python/'
def WriteFile(body, event):
filename = directory + "log/" + \
time.strftime("%Y_%m_%d_%H-%M-%S") + '_' + event
# in case of unexisting folder 'log'
if not os.path.exists(directory + 'log'):
os.mkdir(directory + 'log')
# in case of already existing file :
if os.path.exists(filename + ".json"):
i = 2
while(os.path.exists(filename + '_' + str(i) + ".json")):
i += 1
path = filename + '_' + str(i) + ".json"
else:
path = filename + ".json"
f = open(path, "a")
f.write(body.decode("utf-8"))
f.close()
print("file written : %s" % path)
def step0(endpoint):
downlink.FlushQueue(endpoint.EUI)
downlink.Lorasend(endpoint.EUI, b'\x46')
print("State: The data sent by Gateway")
#sema2.release() #threading.Thread(target=thread_server, args=()).start()
def step1(endpoint):
global TT
#global c
#threading.Thread(target=thread_Tgw, args=()).start()
sema.acquire(1)
#if TT == 5555:
# c=1
#threading.Thread(target=thread_Tgw, args=()).start()
#print ("T : %s" %TT)
print ("T : %s" % struct.pack('dd',TT[0],TT[1]))# TT.to_bytes(8, 'big'))
downlink.FlushQueue(endpoint.EUI)
# send all data
downlink.Lorasend(endpoint.EUI, struct.pack('dd',TT[0],TT[1]))#TT.to_bytes(8, 'big'))
def reset(endpoint):
downlink.FlushQueue(endpoint.EUI)
downlink.Lorasend(endpoint.EUI, b'\x55') #initialisation packet
print("enpoint reset : %s" % endpoint.EUI)
def postcompute(event, body, Tn):
global data
print(datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3])
json_ = json.loads(body)
endpoint = Endpoint()
endpoint.EUIfromjson(json_)
print("request from :\nEUI : %s" % endpoint.EUI)
print("name : %s" % json_['deviceName'])
# write json in a file
WriteFile(body, event)
print("event : %s " % event)
print(datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3])
#treat all cases
if event == 'up':
#b64 to bytes
data = base64.b64decode(json_["data"])
#bytes to integer
#integer = int.from_bytes(data, 'big')
print("data received from Endpoint : ")
print("base 64 : %s" % json_["data"])
print("bytes : %s" % data)
#print("int : %s" % integer)
print()
print(datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3])
data = int.from_bytes(data, 'big')
print("data : %s" % data)
if data == 0x5374617274 : # 0x5374617274 : Start
sema2.release()
global c
c=1
if data == 0x54696D6573: # 0x54696D6573 : Times
threading.Thread(target=thread_Tgw, args=()).start()
#step0(endpoint)
elif event == 'txack':
print("data : %s" % data)
if data == 0x5374617274 : # 0x5374617274 : Start
step0(endpoint)
elif data == 0x54696D6573: # 0x54696D6573 : Times
step1(endpoint)
else:
print("error : uncovered State")
reset(endpoint)
elif event == 'error':
print('error : ' + json_["error"])
else:
#step1(endpoint)
print("possible error : uncovered event")
print(body)
reset(endpoint)
print()
def thread_Tgw():
global c
global TT
TT = [5555,5555]
while(c):
#global TT
sock_T=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock_T.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
sock_T.connect(('127.0.0.1',2222))
TT=sock_T.recv(64)
print(TT)
#TT=int.from_bytes(TT, 'little')
TT=struct.unpack('dd',TT)
#sema.release()
c=0
sock_T.close()
sema.release()
def thread_server():
a=1
while(1):
#global TT
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
sock.bind(('127.0.0.1',4242))
sock.listen(1)
conn,addr=sock.accept()
with conn:
data='q'
sema2.acquire(1)
conn.send(data.encode('ascii'))
a=0
sock.close()
threading.Thread(target=thread_server, args=()).start()
c=1
print("Chirpstack server for downlink : %s" % downlink.server)