add sensor stuff

config.py

@@ -7,6 +7,8 @@ MQTT_SERVER = '172.16.10.47'
 MQTT_LOGIN = 'thermo-anna'
 MQTT_PASSWORD = secrets.MQTT_PASSWORD
 
+LOCATION = "AnnaKoeln"
+
 HEARTBEAT_TOPIC = b'IoT/rpipwThermometer/0/Heartbeat'
 WATCHDOG_TOPIC = b'IoT/Watchdog'
 PAYLOAD_TOPIC = b'IoT/rpipwThermometer/0/Payload'

main.py

@@ -2,12 +2,16 @@ import machine
 from umqttsimple import MQTTClient
 import time
 import ubinascii
-# from machine import WDT
+from machine import Pin
+from onewire import OneWire
+from ds18x20 import DS18X20
 import network
-import os
+import json
 import config
 
 
+SENSOR_PIN = 16
+
 
 print("Hello")
 resetCause = machine.reset_cause()
@@ -42,7 +46,7 @@ try:
     print(f"Connected to MQTT broker {config.MQTT_SERVER} ")
     # wdt.feed()
 
-    client.publish(config.STARTUP_TOPIC, f"Hello, rpipw thermometer is alive now at {wlan.ifconfig()}")
+    # client.publish(config.STARTUP_TOPIC, f"Hello, rpipw thermometer is alive now at {wlan.ifconfig()}")
 except Exception as e:
     print(f"Some error when starting: {e.__class__.__name__}, {e}")
     time.sleep(15)
@@ -50,8 +54,20 @@ except Exception as e:
 
 
 try:
-    client.publish(config.PAYLOAD_TOPIC, f"measurement")
-    print("Payload sent")
+    sensor = DS18X20(OneWire(Pin(SENSOR_PIN, Pin.IN, Pin.PULL_UP)))
+    devices = sensor.scan()
+    sensor.convert_temp()
+    time.sleep(1)
+    for idx, device in enumerate(devices):
+        t = sensor.read_temp(device)
+        msg = {
+            "sensor" : idx,
+            "location": config.LOCATION,
+            "temperature": t
+        }
+        print(f"Sensor: {idx}, {json.dumps(msg)}")
+        client.publish(config.PAYLOAD_TOPIC, json.dumps(msg))
+        print(f"Payload {idx} sent")
     # wdt.feed()
 
     client.disconnect()