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Published © GPL3+

Vehicle Health Monitoring System

Vehicles are usually serviced on time basis or distance basis. Why not make this process more intelligent?

IntermediateFull instructions provided20 hours531
Vehicle Health Monitoring System

Things used in this project

Hardware components

Rapid IoT Prototyping Kit
NXP Rapid IoT Prototyping Kit
×1
Raspberry Pi Zero Wireless
Raspberry Pi Zero Wireless
×1

Software apps and online services

NXP rapid iot studio
grafana
influxdb

Story

Read more

Code

python code

Python
Run at startup. Make sure influxdb and rapid prototyping kit are both up and running!
import time
import os
import pygatt
import binascii
import struct
import json
from subprocess import check_output
from influxdb import InfluxDBClient
RPK_ADDRESS = "00:00:00:00:00:00" # Change this with your Device's BT Address
CHAR_UUIDS = {
  "accelX":"13eb9b68-b891-4134-b09e-e61554e9929e",
  "accelY":"d9a450ad-1421-486d-a72d-865572419ae6",
  "accelZ":"f837afa7-24bc-406b-86e7-c7a90c3704d4",
  "rotX":"7ffd87ab-d953-4342-a2f0-96f229ffddd5",
  "rotY":"846f131b-5cbd-42ee-85ad-f2d31dc97217",
  "rotZ":"8f1cee1b-86fe-4c25-a261-d0bb3a4f2368",
  "Temp":"a213c47d-a4ad-4e8f-8d97-dc479688363e",
  "Humidity":"4bece079-eb30-40ac-8361-5558eeb6b22f"  
}
CHAR_UUIDS_2 = {
  "tvoc":"feb23eee-fa4f-4e87-aaaf-85a2dac44f29",
  "co2":"e5eb79f4-0bc4-4207-9f2d-b1e00ed95ab4"
  }
def save_prk_values():
  """ Saves BLE sensor values, got using BLE-GATT, to an InfluxDB database """
  adapter = pygatt.GATTToolBackend()
  db_client = InfluxDBClient('000.000.0.00', database="rpk")#IP of the desktop-pc
  try:
      # Connect to the RPK device
      adapter.start()
      conn = adapter.connect(RPK_ADDRESS)
      while(1):
         print("start")
         time_info = int(time.time()*1000000000.0)
         # Get sensor values
         sensor_values = {}
         for sensor in CHAR_UUIDS:
             value = conn.char_read(CHAR_UUIDS[sensor])
             print(sensor)
             [value] = struct.unpack('<f',value)
             print(value)
             sensor_values[sensor] = value
         # Save to DB
         for sensor in CHAR_UUIDS_2:
             value = conn.char_read(CHAR_UUIDS_2[sensor])
             print(sensor)
             value = int.from_bytes(value,byteorder='little')
             print(value)
             sensor_values[sensor] = value
         measurements = []
         for sensor in sensor_values:
             measurement = {"measurement" : sensor, "time" : time_info, "fields" : {"value" : sensor_values[sensor]}}
             measurements.append(measurement)
         wifi_ip = check_output(['hostname', '-I'])
         if wifi_ip.decode() == '000.000.0.00 \n': #IP of rpi 
            try:
               with open('foo.txt') as f:
                 lines = f.readlines()
                 lines= [x.strip() for x in lines]
                 for line in lines:
                    print(line)
                    contents = json.loads(line)
                    db_client.write_points(contents)
               os.remove("foo.txt")
            except Exception as e:
               print ("Error: ", e)
            db_client.write_points(measurements)
         else:
            fo = open("foo.txt", "a")
            json.dump(measurements, fo)
            fo.write('\n')
            fo.close()
         time.sleep(0.1)
         print("end")
  except Exception as e:
      print ("Error: ", e)
      msg = "BLE: [%d] %s"%(time_info, e)
  finally:
      adapter.stop()
if __name__ == '__main__':
  save_prk_values()

grafana dashboard

JSON
JSON model of grafana dashboard
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        "colorScheme": "interpolateOranges",
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      },
      "dataFormat": "timeseries",
      "description": "",
      "gridPos": {
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...

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firmware.bin

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Credits

aku

aku

1 project • 1 follower
Thanks to Ben.

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