############################################################################################# # Code to read weight measurements fom Xiaomi Scale V2 # (Framework is prsent to also read from Xiaomi Scale V1, though I do not own one to test so code has not been maintained) # Must be executed with Python 3 else body measurements are incorrect. # Must be executed as root, therefore best to schedule via crontab every 5 min (so as not to drain the battery): # */5 * * * * python3 /path-to-script/Xiaomi_Scale.py # Multi user possible as long as weitghs do not overlap, see lines 117-131 # # Thanks to @syssi (https://gist.github.com/syssi/4108a54877406dc231d95514e538bde9) and @prototux (https://github.com/wiecosystem/Bluetooth) for their initial code # # Make sure you set your MQTT credentials below and user logic/data through the environment variables # ############################################################################################# #!/usr/bin/python # -*- coding: utf-8 -*- from __future__ import print_function import argparse import binascii import time import os import sys from bluepy import btle import paho.mqtt.client as mqtt from datetime import datetime import Xiaomi_Scale_Body_Metrics # Configuraiton... MISCALE_MAC = os.getenv('MISCALE_MAC', '') MQTT_USERNAME = os.getenv('MQTT_USERNAME', '') MQTT_PASSWORD = os.getenv('MQTT_PASSWORD', '') MQTT_HOST = os.getenv('MQTT_HOST', '127.0.0.1') MQTT_PORT = int(os.getenv('MQTT_PORT', 1883)) MQTT_TIMEOUT = int(os.getenv('MQTT_TIMEOUT', 60)) MQTT_PREFIX = os.getenv('MQTT_PREFIX', '') OLD_MEASURE = '' # User Variables... USER1_GT = int(os.getenv('USER1_GT', '70')) # If the weight is greater than this number, we'll assume that we're weighing User #1 USER1_SEX = os.getenv('USER1_SEX', 'male') USER1_NAME = os.getenv('USER1_NAME', 'David') # Name of the user USER1_HEIGHT = int(os.getenv('USER1_HEIGHT', '175')) # Height (in cm) of the user USER1_DOB = os.getenv('USER1_DOB', '1988-09-30') # DOB (in yyyy-mm-dd format) USER2_LT = int(os.getenv('USER2_LT', '55')) # If the weight is less than this number, we'll assume that we're weighing User #2 USER2_SEX = os.getenv('USER2_SEX', 'female') USER2_NAME = os.getenv('USER2_NAME', 'Joanne') # Name of the user USER2_HEIGHT = int(os.getenv('USER2_HEIGHT', '155')) # Height (in cm) of the user USER2_DOB = os.getenv('USER2_DOB', '1988-10-20') # DOB (in yyyy-mm-dd format) USER3_SEX = os.getenv('USER3_SEX', 'male') USER3_NAME = os.getenv('USER3_NAME', 'Unknown User') # Name of the user USER3_HEIGHT = int(os.getenv('USER3_HEIGHT', '175')) # Height (in cm) of the user USER3_DOB = os.getenv('USER3_DOB', '1988-01-01') # DOB (in yyyy-mm-dd format) class ScanProcessor(): def GetAge(self, d1): d1 = datetime.strptime(d1, "%Y-%m-%d") d2 = datetime.strptime(datetime.today().strftime('%Y-%m-%d'),'%Y-%m-%d') return abs((d2 - d1).days)/365 def __init__(self): self.mqtt_client = None self.connected = False self._start_client() def handleDiscovery(self, dev, isNewDev, isNewData): global OLD_MEASURE if dev.addr == MISCALE_MAC.lower() and isNewDev: for (sdid, desc, data) in dev.getScanData(): ### Xiaomi V1 Scale ### if data.startswith('1d18') and sdid == 22: measunit = data[4:6] measured = int((data[8:10] + data[6:8]), 16) * 0.01 unit = '' if measunit.startswith(('03', 'b3')): unit = 'lbs' if measunit.startswith(('12', 'b2')): unit = 'jin' if measunit.startswith(('22', 'a2')): unit = 'kg' ; measured = measured / 2 if unit: if OLD_MEASURE != round(measured, 2): print('') self._publish(round(measured, 2), unit, str(datetime.today().strftime('%Y-%m-%d-%H:%M:%S')), "", "") OLD_MEASURE = round(measured, 2) ### Xiaomi V2 Scale ### if data.startswith('1b18') and sdid == 22: data2 = bytes.fromhex(data[4:]) ctrlByte1 = data2[1] isStabilized = ctrlByte1 & (1<<5) hasImpedance = ctrlByte1 & (1<<1) measunit = data[4:6] measured = int((data[28:30] + data[26:28]), 16) * 0.01 unit = '' if measunit == "03": unit = 'lbs' if measunit == "02": unit = 'kg' ; measured = measured / 2 #mitdatetime = datetime.strptime(str(int((data[10:12] + data[8:10]), 16)) + " " + str(int((data[12:14]), 16)) +" "+ str(int((data[14:16]), 16)) +" "+ str(int((data[16:18]), 16)) +" "+ str(int((data[18:20]), 16)) +" "+ str(int((data[20:22]), 16)), "%Y %m %d %H %M %S") miimpedance = str(int((data[24:26] + data[22:24]), 16)) if unit and isStabilized: if OLD_MEASURE != round(measured, 2) + int(miimpedance): print('') self._publish(round(measured, 2), unit, str(datetime.today().strftime('%Y-%m-%d-%H:%M:%S')), hasImpedance, miimpedance) OLD_MEASURE = round(measured, 2) + int(miimpedance) if not dev.scanData: print ('\t(no data)') def _start_client(self): self.mqtt_client = mqtt.Client() self.mqtt_client.username_pw_set(MQTT_USERNAME, MQTT_PASSWORD) def _on_connect(client, _, flags, return_code): self.connected = True sys.stdout.write("MQTT connection: %s\n" % mqtt.connack_string(return_code)) self.mqtt_client.on_connect = _on_connect self.mqtt_client.connect(MQTT_HOST, MQTT_PORT, MQTT_TIMEOUT) self.mqtt_client.loop_start() def _publish(self, weight, unit, mitdatetime, hasImpedance, miimpedance): if not self.connected: sys.stderr.write('Not connected to MQTT server\n') exit() if int(weight) > USER1_GT: user = USER1_NAME height = USER1_HEIGHT age = self.GetAge(USER1_DOB) sex = USER1_SEX elif int(weight) < USER2_LT: user = USER2_NAME height = USER2_HEIGHT age = self.GetAge(USER2_DOB) sex = USER2_SEX else: user = USER3_NAME height = USER3_HEIGHT age = self.GetAge(USER3_DOB) sex = USER3_SEX lib = Xiaomi_Scale_Body_Metrics.bodyMetrics(weight, height, age, sex, 0) message = '{' message += '"Weight":"' + "{:.2f}".format(weight) + '"' message += ',"BMI":"' + "{:.2f}".format(lib.getBMI()) + '"' message += ',"Basal Metabolism":"' + "{:.2f}".format(lib.getBMR()) + '"' message += ',"Visceral Fat":"' + "{:.2f}".format(lib.getVisceralFat()) + '"' if hasImpedance: lib = Xiaomi_Scale_Body_Metrics.bodyMetrics(weight, height, age, sex, int(miimpedance)) message += ',"Lean Body Mass":"' + "{:.2f}".format(lib.getLBMCoefficient()) + '"' message += ',"Body Fat":"' + "{:.2f}".format(lib.getFatPercentage()) + '"' message += ',"Water":"' + "{:.2f}".format(lib.getWaterPercentage()) + '"' message += ',"Bone Mass":"' + "{:.2f}".format(lib.getBoneMass()) + '"' message += ',"Muscle Mass":"' + "{:.2f}".format(lib.getMuscleMass()) + '"' message += ',"Protein":"' + "{:.2f}".format(lib.getProteinPercentage()) + '"' message += ',"TimeStamp":"' + mitdatetime + '"' message += '}' self.mqtt_client.publish(MQTT_PREFIX + '/' + user + '/weight', message, qos=1, retain=True) sys.stdout.write('Sent data to topic %s: %s' % (MQTT_PREFIX + '/' + user + '/weight', message + '\n')) def main(): sys.stdout.write(' \n') sys.stdout.write('-------------------------------------\n') sys.stdout.write('Starting Xiaomi mi Scale...\n') scanner = btle.Scanner().withDelegate(ScanProcessor()) while True: # try: scanner.scan(5) # except: # sys.stderr.write("Error while running the script, continuing. If you see this message too often/constantly there is probably a real issue...\n") # pass time.sleep(1) if __name__ == "__main__": main()