feature/backend #4
@ -30,5 +30,7 @@ TTN LoRa frequency / region
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3. Build with ESP-IDF extension in VSCodium
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## MQTT Endpoint ##
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`pip3 install paho-mqtt`
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169
msv_clubhouse_backend.py
Normal file
169
msv_clubhouse_backend.py
Normal file
@ -0,0 +1,169 @@
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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""" Author: Hendrik Schutter, mail@hendrikschutter.com
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Date of creation: 2022/03/01
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Date of last modification: 2023/03/01
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"""
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from http.server import BaseHTTPRequestHandler, HTTPServer
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import time
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import threading
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from datetime import datetime
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from urllib.parse import urlsplit, parse_qs
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from random import randrange
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import os, sys, logging, time
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import paho.mqtt.client as mqtt
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import json
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import csv
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from datetime import datetime
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hostName = "127.0.0.1"
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serverPort = 9101
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exporter_prefix = "msv_clubhouse_"
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User = "APP UUID @ttn"
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Password = "API Key"
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theRegion = "EU1" # The region you are using
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scrape_healthy = True
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startTime = datetime.now()
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node_metrics = list()
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mutex = threading.Lock()
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request_count = 0
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# MQTT event functions
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def on_connect(mqttc, obj, flags, rc):
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print("\nConnect: rc = " + str(rc))
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def on_message(mqttc, obj, msg):
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print("\nMessage: " + msg.topic + " " + str(msg.qos)) # + " " + str(msg.payload))
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parsedJSON = json.loads(msg.payload)
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print(json.dumps(parsedJSON, indent=4)) # Uncomment this to fill your terminal screen with JSON
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uplink_message = parsedJSON["uplink_message"];
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frm_payload = uplink_message["frm_payload"];
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print("MSG: " + frm_payload)
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print("MSG: " + str(type(frm_payload)))
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def on_subscribe(mqttc, obj, mid, granted_qos):
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print("\nSubscribe: " + str(mid) + " " + str(granted_qos))
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def on_log(mqttc, obj, level, string):
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print("\nLog: "+ string)
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logging_level = mqtt.LOGGING_LEVEL[level]
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logging.log(logging_level, string)
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class RequestHandler(BaseHTTPRequestHandler):
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def get_metrics(self):
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global request_count
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global node_metrics
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global exporter_prefix
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global mutex
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mutex.acquire()
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self.send_response(200)
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self.send_header("Content-type", "text/html")
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self.end_headers()
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self.wfile.write(bytes(exporter_prefix + "expoter_duration_seconds_sum " + str(int((datetime.now() - startTime).total_seconds())) + "\n", "utf-8"))
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self.wfile.write(bytes(exporter_prefix + "exporter_request_count " + str(request_count) + "\n", "utf-8"))
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self.wfile.write(bytes(exporter_prefix + "exporter_scrape_healthy " + str(int(scrape_healthy)) + "\n", "utf-8"))
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for metric in node_metrics:
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#print(metric)
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self.wfile.write(bytes(exporter_prefix + metric + "\n", "utf-8"))
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mutex.release()
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def do_GET(self):
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global request_count
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request_count = request_count + 1
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print("Request: " + self.path)
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if (self.path.startswith("/metrics")):
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self.get_metrics()
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else:
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self.send_response(200)
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self.send_header("Content-type", "text/html")
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self.end_headers()
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self.wfile.write(bytes("<html>", "utf-8"))
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self.wfile.write(bytes("<head><title>MSV Clubhouse exporter</title></head>", "utf-8"))
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self.wfile.write(bytes("<body>", "utf-8"))
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self.wfile.write(bytes('<h1>msv-clubhouse exporter based on data from LoRaWAN TTN node.</h1>', "utf-8"))
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self.wfile.write(bytes('<p><a href="/metrics">Metrics</a></p>', "utf-8"))
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self.wfile.write(bytes("</body>", "utf-8"))
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self.wfile.write(bytes("</html>", "utf-8"))
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def update_metrics():
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while True:
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print("set data from ttn")
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global node_metrics
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global mutex
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global scrape_healthy
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mutex.acquire()
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scrape_healthy = True
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node_metrics.clear()
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try:
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node_metrics.append("target_temperature " + str(int(42)))
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node_metrics.append("valve " + str(int(42)))
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node_metrics.append("low_battery " + str(int(42)))
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node_metrics.append("window_open " + str(int(42)))
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except Exception as ex:
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print("unable to poll data from TTN! error: " + str(ex))
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scrape_healthy = False
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pass
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mutex.release()
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time.sleep(300)
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def poll_mqtt(mqttc):
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while True:
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mqttc.loop(10) # seconds timeout / blocking time
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print(".", end="", flush=True) # feedback to the user that something is actually happening
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def main():
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print("start")
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print("Init mqtt client")
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mqttc = mqtt.Client()
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print("Assign callbacks")
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mqttc.on_connect = on_connect
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mqttc.on_subscribe = on_subscribe
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mqttc.on_message = on_message
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print("Connect")
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# Setup authentication from settings above
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mqttc.username_pw_set(User, Password)
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# IMPORTANT - this enables the encryption of messages
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mqttc.tls_set() # default certification authority of the system
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mqttc.connect(theRegion.lower() + ".cloud.thethings.network", 8883, 60)
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print("Subscribe")
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mqttc.subscribe("#", 0) # all device uplinks
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print("And run forever")
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poll_mqtt_thread = threading.Thread(target=poll_mqtt, args=((mqttc,)))
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poll_mqtt_thread.start()
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webServer = HTTPServer((hostName, serverPort), RequestHandler)
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print("Server started http://%s:%s" % (hostName, serverPort))
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update_metrics_thread = threading.Thread(target=update_metrics, args=())
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update_metrics_thread.start()
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try:
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webServer.serve_forever()
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except KeyboardInterrupt:
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pass
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webServer.server_close()
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print("Server stopped.")
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update_metrics_thread.join()
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poll_mqtt_thread.join()
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if __name__ == "__main__":
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main()
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Reference in New Issue
Block a user