JeeLink2MQTT/src/jeelink2mqtt.py

#!/usr/bin/python3 -u
# -*- coding: utf-8 -*-
#

import serial
#from serial import Serial

#from serial import Serial
import time
from time import localtime, strftime   

import os
import sys
import paho.mqtt.client as mqtt
#import json
#import math
#import numpy as np
#import httplib

mqtt_server = "mqtt.lan"
mqtt_port = 1883
mqtt_user = "script"
mqtt_password = "rlAzqusqfbAy"

sensordata_maxage = 300

verbosemode = False

if len(sys.argv) > 1 and str(sys.argv[1]) == "-v":
    verbosemode = True
    

def touch(fname, times=None):
    with open(fname, 'a'):
        os.utime(fname, times)

def on_connect(client, userdata, flags, rc):
    if verbosemode:
        print("MQTT connected with result code " + str(rc) + "\n")
    #client.subscribe("wetter/atemp")

def on_disconnect(client, userdata, rc):
    if rc != 0:
        print("Unexpected MQTT disconnection. Will auto-reconnect\n")
        
#def on_message(client, userdata, msg):
#    #print(msg.topic + " " + str(msg.payload))
#    global atemp
#    atemp = msg.payload
    

minUpdateInterval = 60
mqtt_topic_prefix = "LaCrosse"
override_updateinterval_on_change = False
atemp_sensor_idx = 94
atemp_sensor_idx_2 = 113

atemp = 61 #starting values only..
ahum = 101
atemp1 = 61
ahum1 = 101
atemp2 = 61
ahum2 = 101
atemp_last = 61
ahum_last = 101

checkLastUpdateInterval = 60
checkLastUpdateInterval_lastRun = 0

sensors = {}
sensors_idx = {}
sensors_lastTemp = {}
sensors_lastHum = {}
sensors_lastUpdate = {}
sensors_unavailable = {}

if verbosemode:
    print("JeeLink2MQTT by Flo Kra")
    print("=======================================================================")
    print("loading sensors assignment: ")

with open("/home/pi/jeelink_sensors.csv", "r") as sensorscsv:
    for line in sensorscsv:
        if line.find('ID,DomoticzIdx,Name') == -1:
            # nur Zeilen die nicht der header sind sind interessant
            line = line.strip('\r')
            line = line.strip('\n')
            
            parts = line.split(',')
            sensorId = parts[0]
            domoticzIdx = parts[1]
            sensorName = parts[2]
            
            sensors[str(sensorId)] = str(sensorName)
            sensors_idx[str(sensorId)] = str(domoticzIdx)
            sensors_lastUpdate[str(sensorId)] = 0
            sensors_unavailable[str(sensorId)] = 1 #will be overwritten when first value is received
            if verbosemode:
                idhex = "{0:x}".format(int(sensorId))
                print("Sensor " + sensorId + " = 0x" + str(idhex) + ", Idx = " + str(domoticzIdx) + ", Name = '" + sensorName + "'")

if verbosemode:
    print("\n")
            
mqttc = mqtt.Client()
mqttc.on_connect = on_connect
mqttc.on_disconnect = on_disconnect
##mqttc.on_message = on_message

mqttc.username_pw_set(mqtt_user, mqtt_password)
mqttc.connect(mqtt_server, mqtt_port, 60)

mqttc.loop_start()
#mqttc.loop_forever()

ser = serial.Serial(port='/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_AL01MYTF-if00-port0',
    baudrate = 57600,
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS,
    timeout=1)

#sensors = {'4':'Arbeitszimmer','16':'AussenGarten','60':'AussenParkplatz','50':'Bad','39':'Balkon','55':'Kueche','40':'Schlafzimmer'}
#sensors_idx = {'4':'1','16':'94','60':'113','50':'4','39':'88','55':'6','40':'3'}

#if verbosemode:
#    print(sensors)
#    print(sensors_idx)
    

checkLastUpdateInterval_lastRun = time.time() # first check after 1 min
    
try:
    while True:
        msg_was_sent = 0
        
        #clear serial buffer to remove junk and noise
        ser.flushInput()
        
        #read buffer until cr/lf
        serLine = ser.readline().strip()
        # catch exception on invalid char coming in: UnicodeDecodeError: 'ascii' codec can't decode byte 0xf4 in position 6: ordinal not in range(128)
        try: 
            serLine = serLine.decode('ascii')
        except:
            serLine = ""

        if(serLine):
            if serLine.find('OK 9') != -1:
                if verbosemode:
                    print(serLine + " = LaCrosse sensor")

                # uns interessieren nur reinkommende Zeilen die mit "OK 9 " beginnen
                
                # 0  1 2  3   4   5   6
                # OK 9 ID XXX XXX XXX XXX
                # |  | |  |   |   |   |
                # |  | |  |   |   |   --- Humidity incl. WeakBatteryFlag
                # |  | |  |   |   |------ Temp * 10 + 1000 LSB
                # |  | |  |   |---------- Temp * 10 + 1000 MSB
                # |  | |  |-------------- Sensor type (1 or 2) +128 if NewBatteryFlag
                # |  | |----------------- Sensor ID
                # |  |------------------- fix "9"
                # |---------------------- fix "OK"
                
                serLineParts = serLine.split(' ')
                
                #addr = serLineParts[2]
                #addr = "{0:x}".format(int(serLineParts[2]))
                #addr = hex((int(serLineParts[2])))
                addr = int(serLineParts[2])
                addrhex = "{0:x}".format(int(serLineParts[2]))
                    
                
                lastUpdate = sensors_lastUpdate.get(str(addr), None)
                lastTemp = sensors_lastTemp.get(str(addr), None)
                lastHum = sensors_lastHum.get(str(addr), None)
                currentsensor_idx = sensors_idx.get(str(addr),None)
                currentsensor_name = sensors.get(str(addr), None)
                
                if int(serLineParts[3]) >= 128: 
                    batt_new = 1
                    type = int(serLineParts[3]) - 128
                else:
                    batt_new = 0
                    type = int(serLineParts[3])
                
                temp = (int(serLineParts[4])*256 + int(serLineParts[5]) - 1000)/10.0
                
                if int(serLineParts[6]) >= 128: 
                    batt_low = 1
                    hum = int(serLineParts[6]) - 128
                else:
                    batt_low = 0
                    hum = int(serLineParts[6])
                    if hum > 100: 
                        hum = 100
                
                if batt_low == 0:
                    batterystate = "ok"
                else:
                    batterystate = "low"
                
                senddata = False
                if currentsensor_idx is not None:
                    if override_updateinterval_on_change:
                        if lastTemp != temp or lastHum != hum:
                            senddata = True
                            if verbosemode:
                                print("override interval (value changed): " + str(temp) + " != " + str(lastTemp) + "    " + str(hum) + " != " + str(lastHum))
                            
                    if lastUpdate is not None:
                        timediff = int(time.time()) - lastUpdate
                        if timediff >= minUpdateInterval:
                            senddata = True
                        elif sensors_unavailable[str(addr)] == 1:
                            senddata = True
                    else:
                        senddata = True
                
                    sensors_unavailable[str(addr)] = 0
                    #print(sensors_unavailable)
                
                if currentsensor_name is None: 
                    if batt_new == 1:
                        fname = '/home/pi/logs/jeelink_unknown_new_sensor_' + str(addr)
                    else:
                        fname = '/home/pi/logs/jeelink_unknown_sensor_' + str(addr)
                        
                    if not os.path.isfile(fname):
                        try:
                            touch(fname)
                        except:
                            # guat dann hoit ned...
                            pass
                    temp = (int(serLineParts[4])*256 + int(serLineParts[5]) - 1000)/10.0
                    if verbosemode:
                        print("unknown sensor ID " + str(addr))
                    mqttc.publish(mqtt_topic_prefix+"/UnknownSensor/"+str(addr)+"/temperature", str(temp), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/UnknownSensor/"+str(addr)+"/humidity", str(hum), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/UnknownSensor/"+str(addr)+"/battNew", str(batt_new), qos=2, retain=False)

                
                if verbosemode:
                    print("addr: " + str(addr) + " = 0x" + str(addrhex) + "   batt_new: " + str(batt_new) + "   type: " + str(type) + "   batt_low: " + str(batt_low) + "   temp: " + str(temp) + "   hum: " + str(hum) + "   Name: " + str(currentsensor_name))
                
                if senddata:
                    sensors_lastUpdate[str(addr)] = int(time.time())
                    sensors_lastTemp[str(addr)] = temp
                    sensors_lastHum[str(addr)] = hum
                    
                    isAtemp = False
                    if int(currentsensor_idx) == atemp_sensor_idx:
                        atemp1 = temp
                        ahum1 = hum
                        isAtemp = True
                    elif int(currentsensor_idx) == atemp_sensor_idx_2:
                        atemp2 = temp
                        ahum2 = hum
                        isAtemp = True
                    
                    if isAtemp:
                        if atemp1 <= atemp2:
                            atemp = atemp1
                            ahum = ahum1
                        else:
                            atemp = atemp2
                            ahum = ahum2
                        
                        if atemp < 61 and ahum < 101:
                            if atemp != atemp_last or ahum != ahum_last:
                                atemp_last = atemp
                                ahum_last = ahum
                                mqttc.publish("wetter/atemp", str(atemp), qos=2, retain=True)
                                mqttc.publish("wetter/ahum", str(ahum), qos=2, retain=True)
                    
                    domoticz_json = "{\"idx\":" + str(currentsensor_idx) + ",\"nvalue\":0,\"svalue\":\"" + str(temp) + ";" + str(hum) + ";1\"}"
                    #if verbosemode:
                    #    print(domoticz_json)
                    mqttc.publish("domoticz/in", domoticz_json, qos=2, retain=False)
                    
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/temperature", str(temp), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/humidity", str(hum), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/battery", str(batterystate), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/lastUpdate", strftime("%Y-%m-%d %H:%M:%S", localtime()), qos=2, retain=False)
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/availability", "available", qos=2, retain=False)
                    
                    lacrosse_json = "{\"temperature\":" + str(temp) + ", \"humidity\":" + str(hum) + ", \"battery\":\"" + str(batterystate) + "\"}"
                    mqttc.publish(mqtt_topic_prefix+"/"+str(currentsensor_name)+"/json", lacrosse_json, qos=2, retain=False)
                    
                    if verbosemode:
                        print("MQTT published")
                
                    try:
                        touch("/tmp/jeelink2mqtt_running")
                    except:
                        # guat dann ned...
                        pass
                
                else:
                    if verbosemode:
                        if currentsensor_name is None: 
                            print("MQTT published")
                        else:
                            print("MQTT publishing surpressed (interval not expired)")
                
                
                if verbosemode:
                    print("\n")
                        
        # handle outdated sensor values once a minute
        if (time.time() - checkLastUpdateInterval_lastRun) > checkLastUpdateInterval:
            checkLastUpdateInterval_lastRun = time.time()
            #print("check lastUpdate")
            for key in sensors_lastUpdate:
                #print(key, '->', sensors_lastUpdate[key], '->', sensors[key])
                if (time.time() - sensors_lastUpdate[key]) > sensordata_maxage:
                    if verbosemode:
                        print(sensors[key], ' outd ->')
                    sensors_unavailable[key] = 1
                    mqttc.publish(mqtt_topic_prefix+"/"+str(sensors[key])+"/availability", "unavailable", qos=2, retain=False)

except KeyboardInterrupt:
    print('\n')
    exit()