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50 lines
1.2 KiB
50 lines
1.2 KiB
4 years ago
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import json
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import time
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import paho.mqtt.client as mqtt
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import threading
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id = '<ID>'
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client_telemetry_topic = id + '/telemetry'
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server_command_topic = id + '/commands'
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client_name = id + 'soilmoisturesensor_server'
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mqtt_client = mqtt.Client(client_name)
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mqtt_client.connect('test.mosquitto.org')
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mqtt_client.loop_start()
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water_time = 5
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wait_time = 20
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def send_relay_command(client, state):
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command = { 'relay_on' : state }
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print("Sending message:", command)
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client.publish(server_command_topic, json.dumps(command))
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def control_relay(client):
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print("Unsubscribing from telemetry")
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mqtt_client.unsubscribe(client_telemetry_topic)
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send_relay_command(client, True)
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time.sleep(water_time)
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send_relay_command(client, False)
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time.sleep(wait_time)
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print("Subscribing to telemetry")
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mqtt_client.subscribe(client_telemetry_topic)
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def handle_telemetry(client, userdata, message):
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payload = json.loads(message.payload.decode())
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print("Message received:", payload)
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if payload['soil_moisture'] > 450:
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threading.Thread(target=control_relay, args=(client,)).start()
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mqtt_client.subscribe(client_telemetry_topic)
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mqtt_client.on_message = handle_telemetry
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while True:
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time.sleep(2)
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