81 lines
2.4 KiB
Python
Executable File
81 lines
2.4 KiB
Python
Executable File
import json
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#import fileinput
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import serial
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import paho.mqtt.client as paho
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#input = '{"model":"Oregon-THGR810","id":226,"channel":10,"battery_ok":0,"temperature_C":19.7,"humidity":24,"protocol":"Oregon Scientific Weather Sensor"}'
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SKIP_KEYS = [ "type", "model", "subtype", "channel", "id", "mic", "mod", "freq", "sequence_num", "message_type", "exception", "raw_msg", "protocol", "duration", "sync", "flags", "status" ]
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TOPIC_KEYS = [ "type", "model", "subtype", "channel", "id" ]
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#default="devices[/type][/model][/subtype][/channel][/id]"
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prefix = "home/rtl_433"
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broker = "192.168.67.1"
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port = 1883
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altitude = 150
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serialdev = "/dev/ttyACM0"
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serialspeed = 115200
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def get_humidex(tdb, rh):
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return round(tdb + 5 / 9 * ((6.112 * 10 ** (7.5 * tdb / (237.7 + tdb)) * rh / 100) - 10))
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def get_sealevel_pressure(pres, altitude, temp):
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return (pres / pow(1 - ((0.0065 *altitude) / (temp + (0.0065 *altitude) + 273.15)), 5.257));
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def generate_topic(jsonin):
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topic = prefix+'/devices'
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for t in TOPIC_KEYS:
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if t in jsonin:
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topic += '/' + str(jsonin[t])
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return topic
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def publish(jsonin, prefix_device):
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for t in jsonin:
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if t not in SKIP_KEYS:
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topic = prefix_device + '/' + t
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value = jsonin[t]
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#print("{} {}".format(topic, value))
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mqtt.publish(topic, value)
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def on_connect(client, userdata, flags, reason_code, properties):
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print(f"Connected to MQTT")
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client.subscribe(prefix+"/cmd")
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def on_message(client, userdata, msg):
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print(msg.topic+" "+str(msg.payload))
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if(str(msg.topic) == prefix+"/cmd"):
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ser.write(msg.payload)
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mqtt=paho.Client(paho.CallbackAPIVersion.VERSION2)
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mqtt.on_connect = on_connect
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mqtt.on_message = on_message
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mqtt.connect(broker,port)
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mqtt.loop_start()
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ser = serial.Serial(serialdev, serialspeed)
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#for input in fileinput.input():
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while True:
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input = ser.readline()
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try:
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data = json.loads(input)
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except json.decoder.JSONDecodeError:
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print("Error JSON, received {}".format(input))
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continue
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#print(data)
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#mqtt.publish(prefix+'/events', input.rstrip())
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if 'humidity' in data and 'temperature_C' in data:
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data['humidex'] = get_humidex(data['temperature_C'], data['humidity'])
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if 'pressure' in data:
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data['pressure'] = get_sealevel_pressure(data['pressure'], altitude, data['temperature_C'])
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data['pressure'] = round(data['pressure'], 1)
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mqtt.publish(prefix+'/events', json.dumps(data))
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prefix_device = generate_topic(data)
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publish(data, prefix_device)
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