def run(self):
"""
Main class function
:return:
"""
while True:
if self.connection:
if not self.connection.status() == OBDStatus.CAR_CONNECTED:
self.connection = OBD(self.port, self.baud, self.protocol)
elif self.connection.status() == OBDStatus.CAR_CONNECTED:
self.get_all_pids()
else:
self.init_bt()
self.connection = OBD(self.port, self.baud, self.protocol)
def speedometer():
speedData = OBD().query(commands.SPEED).value.to("mph")
speedText = str(speedData) + " mph"
speed.config(text=speedText,
bg='black',
fg='#F4511E',
font=("Helvetica", 72, "bold"))
speed.place(anchor='center', relx=0.5, rely=0.5)
root.after(1000, speedometer) # Update speedometer every second
# Weirdly the OBD port doesn't differentiate forward movement from backward movement
class OBDReading():
def __init__(self, connection):
self.throttle = connection.query(commands.THROTTLE_ACTUATOR).value.magnitude
self.rpm = connection.query(commands.RPM).value.magnitude
self.engineLoad = connection.query(commands.ENGINE_LOAD).value.magnitude
self.speed = connection.query(commands.SPEED).value.magnitude
if self.speed == 0 or self.speed is None:
self.moving = False
else:
print('moving')
self.moving = True
self.csvstring = "{},{},{},{},".format(self.throttle,self.rpm,self.engineLoad,self.speed)
conn = OBD(portstr='/dev/ttyUSB0',baudrate=38400,fast=False)
with open('/home/stephen/loggeddata.csv', 'w', newline='') as csvfile:
if conn.status() == OBDStatus.CAR_CONNECTED:
print(conn.status())
try:
while True:
reading = []
print('reading reset')
reading.append(OBDReading(conn))
if not reading[0].moving:
reading.append(OBDReading(conn))
if reading[1].moving:
print('{},{}'.format(reading[0].moving, reading[0].speed))
print('{},{}'.format(reading[1].moving, reading[1].speed))
print('beginlogging')
for _ in range(0,10):
# Blink display led 5 times to show device has started
# led will blink at 2500ms intervals while data is uploaded
# to firebase
led = LED(17)
led.off()
for i in range(0, 4):
led.on()
sleep(.5)
led.off()
sleep(.5)
# Connect to Car ECU
ecuAttempt = 1
try:
f.write('Attempting Connection to OBD \n')
connection = OBD()
f.write(str(connection) + '\n')
except:
sleep(.25)
f.write("Connection to ECU #:{} unsuccsesfull, retrying...\n".format(
str(ecuAttempt)))
ecuAttempt += 1
break
# Fetch the service account key for firebase from JSON file contents & initilize
cred = credentials.Certificate('OBDII.json')
initialize_app(
cred, {'databaseURL': 'https://obdiidata.firebaseio.com/'})
ref = db.reference('/')
from obd import OBD # Create the OBD object - we will leave the port blank so the app will run a port scan and let us know which port # the OBD connector will be plugged into. This will be different on each device so this may help debug some initial # issues when running on the pi for the first time conn = OBD(portstr=None, baudrate=None, protocol=None, fast=True)