def __init__(self, path, log_sensors):
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.port = None
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H_%M_%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write("Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,"
"Air-Flow-Rate,Engine-Time,MPG\n")
for sensor in log_sensors:
self.add_log_sensor(sensor)
self.config_path = "/home/pi/PiMyRide/config.ini"
self.Config = ConfigParser.ConfigParser()
if not os.path.isfile(self.config_path):
open(self.config_path, "w")
self.Config.add_section("Settings")
self.Config.set("Settings", "logging_enabled", True)
self.Config.set("Settings", "mpg_enabled", True)
self.Config.set("Settings", "current_screen", 0)
self.Config.write(self.config_path)
self.config_path.close()
self.Config.read(self.config_path)
self.logging_enabled = self.Config.getboolean("Settings",
"logging_enabled")
self.mpg_enabled = self.Config.getboolean("Settings", "mpg_enabled")
self.current_screen = self.Config.get("Settings", "current_screen")
self.display_enabled = True
self.display_in_use = False
def __init__(self, path, log_sensors):
self.port = None
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H:%M:%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write(
"Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,Air-Flow-Rate,MPG\n"
)
for sensor in log_sensors:
self.add_log_sensor(sensor)
def __init__(self, path, log_sensors):
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.port = None
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H_%M_%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write("Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,"
"Air-Flow-Rate,Engine-Time,MPG\n")
for sensor in log_sensors:
self.add_log_sensor(sensor)
self.config_path = "/home/pi/PiMyRide/config.ini"
self.Config = ConfigParser.ConfigParser()
if not os.path.isfile(self.config_path):
open(self.config_path, "w")
self.Config.add_section("Settings")
self.Config.set("Settings", "logging_enabled", True)
self.Config.set("Settings", "mpg_enabled", True)
self.Config.set("Settings", "current_screen", 0)
self.Config.write(self.config_path)
self.config_path.close()
self.Config.read(self.config_path)
self.logging_enabled = self.Config.getboolean("Settings",
"logging_enabled")
self.mpg_enabled = self.Config.getboolean("Settings", "mpg_enabled")
self.current_screen = self.Config.get("Settings", "current_screen")
self.display_enabled = True
self.display_in_use = False
def __init__(self, path, log_sensors):
self.port = None
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
#self.lcd.backlight(lcd.ON)
self.sensorlist = []
dest_file = path + (datetime.now().strftime('%d%b-%H:%M:%S')) + ".csv"
self.log_csv = open(dest_file, "w", 128)
self.log_csv.write(
"Time,RPM,MPH,Throttle-Position,Calculated-Load,Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,Air-Flow-Rate,MPG\n");
for sensor in log_sensors:
self.add_log_sensor(sensor)
class PiMyRide_Logger():
"""THE class"""
def __init__(self, path, log_sensors):
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.port = None
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H_%M_%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write("Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,"
"Air-Flow-Rate,Engine-Time,MPG\n")
for sensor in log_sensors:
self.add_log_sensor(sensor)
self.config_path = "/home/pi/PiMyRide/config.ini"
self.Config = ConfigParser.ConfigParser()
if not os.path.isfile(self.config_path):
open(self.config_path, "w")
self.Config.add_section("Settings")
self.Config.set("Settings", "logging_enabled", True)
self.Config.set("Settings", "mpg_enabled", True)
self.Config.set("Settings", "current_screen", 0)
self.Config.write(self.config_path)
self.config_path.close()
self.Config.read(self.config_path)
self.logging_enabled = self.Config.getboolean("Settings",
"logging_enabled")
self.mpg_enabled = self.Config.getboolean("Settings", "mpg_enabled")
self.current_screen = self.Config.get("Settings", "current_screen")
self.display_enabled = True
self.display_in_use = False
def exit(self, shutdown):
self.Config.set("Settings", "current_screen", self.current_screen)
self.Config.set("Settings", "logging_enabled", self.logging_enabled)
self.Config.set("Settings", "mpg_enabled", self.mpg_enabled)
self.Config.write(self.config_path)
print("Configuration saved.")
self.lcd.clear()
self.lcd.noDisplay()
if shutdown:
os.command("sudo shutdown now")
sys.exit()
elif not shutdown:
sys.exit()
def display_alert(self, message, alert_duration):
"""Take control of the LCD screen for displaying an alert"""
self.display_in_use = True
self.lcd.clear()
self.lcd.home()
self.lcd.message(message)
sleep(alert_duration)
self.display_in_use = False
def lcd_update(self, message, is_alert):
"""
Update the LCD screen. Allows for rapid updating of the screen,
while not stopping the program if an alert needs to be
displayed. Sensor data will not be shown while an alert is
being displayed
"""
if self.display_enabled and not self.display_in_use:
if not is_alert:
# Rapidly update sensor data readout
self.lcd.clear()
self.lcd.home()
self.lcd.message(message)
elif is_alert:
# Display alert using a new thread as to not
# intturpt the sensor logging.
alert_duration = 1.5
thread.start_new_thread(self.display_alert, (
message, alert_duration))
def connection_error(self, reason):
print("Connection error, disconnecting")
if not self.display_enabled:
self.lcd.display()
self.lcd_update("Connection error\n" + reason, False)
sleep(2)
while 1:
self.lcd_update("OK to reconnect\nDOWN to shutdown", False)
if self.lcd.buttonPressed(self.lcd.SELECT):
print("Select buttpn pressed, \
attempting to recconect...")
self.lcd_update("Reconnecting...", False)
self.start()
elif self.lcd.buttonPressed(self.lcd.DOWN):
print("Down buttpn pressed, shutting down...")
self.lcd_update("Shutting Down...", False)
sleep(1)
self.lcd.noDisplay()
self.exit(True)
elif self.lcd.buttonPressed(self.lcd.DOWN):
print("Up buttpn pressed, exiting...")
self.lcd_update("Exiting\nProgram...", False)
sleep(1)
self.lcd.clear()
self.lcd.noDisplay()
self.exit(False)
sleep(0.10)
def connect(self):
"""
Check all serial ports, print availible ports,
close on no open ports.
"""
port_names = scanSerial()
print(port_names)
for port in port_names:
self.port = obd_io.OBDPort(port, None, 2, 2)
if self.port.State == 0:
self.port.close()
self.port = None # No open ports close
else:
break # Break with connection
if self.port:
print("Connected")
self.lcd_update("Connected", False)
else:
print("Not Connected")
self.connection_error("Not connected")
def is_connected(self):
return self.port
def add_log_sensor(self, sensor):
"""
Add the sensors to read from from the list.
These sensors are in obd_sensors.py.
"""
for index, e in enumerate(obd_sensors.SENSORS):
if sensor == e.shortname:
self.sensor_list.append(index)
print("Logging Sensor: " + e.name)
break
def get_mpg(self, MPH, MAF):
"""Calculate MPG for petrol enignes, not for diesel"""
Instant_MPG = (14.7 * 7.273744 * 4.54 * MPH) / (3600 * MAF / 100)
return Instant_MPG
def record_data(self):
"""Actually start recording the data and doing stuff with it"""
if self.port is None:
return None
data_screens = [
["rpm", "speed"],
["throttle_pos", "load"],
["temp", "intake_air_temp"],
["manifold_pressure", "maf"],
["engine_time", "timing_advance"],
]
sensor_names = {
"rpm": "RPM",
"speed": "Speed",
"throttle_pos": "Throttle",
"load": "Load",
"temp": "Temp",
"intake_air_temp": "Intake Temp",
"manifold_pressure": "Pressure",
"maf": "MAF",
"engine_time": "Time",
"timing_advance": "Timing Advance",
"fuel_status": "Fuel Status",
"fuel_rate": "Fuel Rate",
"fuel_pressure": "Fuel Pressure"
}
print("Logging started")
self.lcd_update("Logging started", True)
while 1:
if self.display_enabled:
if self.lcd.buttonPressed(self.lcd.RIGHT):
# Go to next screen; setting is persistent
total_screens = len(self.data_screens) - 1
if self.current_screen < total_screens:
self.current_screen = self.current_screen + 1
elif self.current_screen == total_screens:
self.current_screen = 0
assert self.current_screen <= total_screens
if self.lcd.buttonPressed(self.lcd.LEFT):
# Go to previous screen; setting is persistent
total_screens = len(self.data_screens) - 1
if self.current_screen > 0:
self.current_screen = self.current_screen - 1
elif self.current_screen == 0:
self.current_screen = total_screens
if self.lcd.buttonPressed(self.lcd.UP):
# Enable/disable calculating MPG; persistent
if self.mpg_enabled:
self.mpg_enabled = False
print("MPG disabled")
self.lcd_update("MPG disabled", True)
elif not self.mpg_enabled:
self.mpg_enabled = True
print("MPG enabled")
self.lcd_update("MPG enabled", True)
if self.lcd.buttonPressed(self.lcd.DOWN):
# Enable/disable logging; persistent
if self.logging_enabled:
self.logging_enabled = False
print("Logging disabled")
self.lcd_update("Logging disabled", True)
elif not self.logging_enabled:
self.logging_enabled = True
print("Logging enabled")
self.lcd_update("Logging enabled", True)
if self.lcd.buttonPressed(self.lcd.SELECT):
# Turn off/on LCD; not persistent
if self.display_enabled:
self.display_enabled = False
self.lcd.clear()
self.lcd.home()
self.lcd.noDisplay()
print("Display disabled")
elif not self.display_enabled:
self.display_enabled = True
self.lcd.display()
print("Display enabled")
self.lcd_update("Display enabled", True)
log_time = datetime.now().strftime('%d%b-%H:%M:%S.%f')
log_data = log_time # Start of the logging string
result_set = {}
# Log all of sensor data from sensor_list
for index in self.sensor_list:
(name, value, unit) = self.port.sensor(index)
# print(self.port.sensor(index)) # Print the data
log_data = log_data + "," + str(value)
result_set[obd_sensors.SENSORS[index].shortname] = value
# Exit the program on "NODATA"/dropped connection
if (result_set["rpm"] == "NODATA") or (
result_set["speed"] == "NODATA") or (
result_set["temp"] == "NODATA"):
self.connection_error("NODATA")
break
if self.mpg_enabled:
Instant_MPG = self.get_mpg(result_set["speed"],
result_set["maf"])
# Add mpg to log string
log_data = log_data + "," + str(Instant_MPG)
if self.logging_enabled:
self.log_csv.write(log_data + "\n")
if self.display_enabled:
# Show data on lcd
msg_line_1 = sensor_names[data_screens[self.current_screen][0]] +\
" " + str(round(result_set[data_screens[self.current_screen][0]], 2))
msg_line_2 = sensor_names[data_screens[self.current_screen][1]] +\
" " + str(round(result_set[data_screens[self.current_screen][1]], 2))
lcd_message = str(msg_line_1) + "\n" + str(msg_line_2)
self.lcd_update(lcd_message, False)
def start(self):
self.connect()
if not self.is_connected():
self.connection_error("Not connected")
self.record_data()
class PiMyRide_Logger():
def __init__(self, path, log_sensors):
self.port = None
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H:%M:%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write(
"Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,Air-Flow-Rate,MPG\n"
)
for sensor in log_sensors:
self.add_log_sensor(sensor)
def connect(self): # Check all serial ports.
port_names = scanSerial() # print available ports
print port_names
for port in port_names:
self.port = obd_io.OBDPort(port, None, 2, 2)
if self.port.State == 0:
self.port.close()
self.port = None # no open ports close
else:
break # break with connection
if self.port:
self.lcd.clear()
self.lcd.message("Connected")
print "Connected"
def is_connected(self): # check if connected
return self.port
# add the sensors to read from from the list below. this sensors are in obd_sensors.py
def add_log_sensor(self, sensor):
for index, e in enumerate(obd_sensors.SENSORS):
if sensor == e.shortname:
self.sensor_list.append(index)
print "Logging Sensor: " + e.name # logging this sensor
break
def get_mpg(self, MPH, MAF):
# Instant_MPG = (14.7 * 8.637571 * 4.54 * MPH) / (3600 * (MAF * 7.5599) / 100) #Diesel Inaccurate formula
Instant_MPG = (14.7 * 7.273744 * 4.54 * MPH) / (
3600 * MAF / 100) # Petrol Should accurate
return Instant_MPG
def record_data(self):
if self.port is None:
return None
self.lcd.clear()
self.lcd.message("Logging started")
print "Logging started"
while 1:
log_time = datetime.now().strftime(
'%d%b-%H:%M:%S.%f') # today's date and time
log_data = log_time # start of the logging string
result_set = {}
for index in self.sensor_list: # log all of our sensors data from sensor_list
(name, value, unit) = self.port.sensor(index)
print self.port.sensor(
index) # print the data provides feedback to user
log_data = log_data + "," + str(value) # add to log string
result_set[
obd_sensors.SENSORS[index].
shortname] = value # add data to a result set for more manipulation
# we don't want to log "NODATA" if the car drops the OBDII connection rather exit the program
if (result_set["rpm"]
== "NODATA") or (result_set["speed"] == "NODATA") or (
result_set["throttle_pos"]
== "NODATA") or (result_set["load"] == "NODATA") or (
result_set["temp"] == "NODATA"
) or (result_set["intake_air_temp"] == "NODATA") or (
result_set["manifold_pressure"]
== "NODATA") or (result_set["maf"] == "NODATA"):
self.lcd.clear()
self.lcd.message("Connection Error\n Disconnecting")
sleep(3) # show the message
self.lcd.message(" Disconnected")
sys.exit() # exit the program
Instant_MPG = self.get_mpg(result_set["speed"],
result_set["maf"]) # calculate mpg
self.lcd.clear()
self.lcd.message('MPG ' + '%.2f' % Instant_MPG + '\n')
self.lcd.message('RPM ' + str(result_set["rpm"]))
log_data = log_data + "," + str(
Instant_MPG) # add mpg to result string
self.log_csv.write(log_data + "\n") # write to csv
log_data = log_data + "," + str(
Instant_MPG) # add mpg to result string
self.log_csv.write(log_data + "\n") # write to csv
def ensure_dir(
f
): # Make a new directory for each day will make managing the logs easier
d = os.path.dirname(f)
if not os.path.exists(
d): # check if directory exists if it does not create it
os.makedirs(d)
dir_date = datetime.now()
path = datetime.now().strftime('%d-%b-%Y')
ensure_dir("/home/pi/logs/" + path + "/") # ensure the dir is available
log_sensors = [
"rpm", "speed", "throttle_pos", "load", "temp", "intake_air_temp",
"manifold_pressure", "maf"
]
logger = PiMyRide_Logger("/home/pi/logs/" + path + "/", log_sensors)
logger.connect()
if not logger.is_connected():
error = CharLCDPlate()
error.begin(16, 1)
error.message(" Not connected")
logger.record_data()
import socket
import fcntl
import struct
from CharLCDPlate import CharLCDPlate
SIOCGIFADDR = 0x8915
def get_ip_addr(iface):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(s.fileno(), SIOCGIFADDR, struct.pack('256s', iface[:15]))[20:24])
if __name__ == "__main__":
lcd = CharLCDPlate()
ip = get_ip_addr("wlan0")
lcd.message("IP-Addresse:\n%s" % ip)
class PiMyRide_Logger():
def __init__(self, path, log_sensors):
self.port = None
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
#self.lcd.backlight(lcd.ON)
self.sensorlist = []
dest_file = path + (datetime.now().strftime('%d%b-%H:%M:%S')) + ".csv"
self.log_csv = open(dest_file, "w", 128)
self.log_csv.write(
"Time,RPM,MPH,Throttle-Position,Calculated-Load,Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,Air-Flow-Rate,MPG\n");
for sensor in log_sensors:
self.add_log_sensor(sensor)
def connect(self):# Check all serial ports.
portnames = scanSerial()# print available ports
print portnames
for port in portnames:
self.port = obd_io.OBDPort(port, None, 2, 2)
if (self.port.State == 0):
self.port.close()
self.port = None # no open ports close
else:
break # break with connection
if (self.port):
self.lcd.clear()
self.lcd.message("Connected")
print "Connected"
def is_connected(self): # check if connected
return self.port
def add_log_sensor(self,
sensor): # add the sensors to read from from the list below. this sensors are in obd_sensors.py
for index, e in enumerate(obd_sensors.SENSORS):
if (sensor == e.shortname):
self.sensorlist.append(index)
print "Logging Sensor: " + e.name # logging this sensor
break
def get_mpg(self, MPH, MAF):
# Instant_MPG = (14.7 * 8.637571 * 4.54 * MPH) / (3600 * (MAF * 7.5599) / 100) #Diesel Inaccurate formula
Instant_MPG = (14.7 * 7.273744 * 4.54 * MPH) / (3600 * MAF / 100) # Petrol Should be highly accurate
return Instant_MPG
def record_data(self):
if (self.port is None):
return None
self.lcd.clear()
self.lcd.message("Logging started")
print "Logging started"
while 1:
log_time = datetime.now().strftime('%d%b-%H:%M:%S.%f') # todays date and time
log_data = log_time # start of the logging string
result_set = {}
for index in self.sensorlist:# log all of our sensors data from sensorlist
(name, value, unit) = self.port.sensor(index)
print self.port.sensor(index) # print the data provides feedback to user
log_data = log_data + "," + str(value) # add to log string
result_set[
obd_sensors.SENSORS[index].shortname] = value; # add data to a result set for more manipulation
# we dont want to log "NODATA" if the car drops the OBDII connetion rather exit the program
if (result_set["rpm"] == "NODATA") or (result_set["speed"] == "NODATA") or (
result_set["throttle_pos"] == "NODATA") or (result_set["load"] == "NODATA") or (
result_set["temp"] == "NODATA") or (result_set["intake_air_temp"] == "NODATA") or (
result_set["manifold_pressure"] == "NODATA") or (result_set["maf"] == "NODATA"):
self.lcd.clear()
self.lcd.message("Connection Error\n Disconnecting")
sleep(3) # show the message
self.lcd.message(" Disconnected")
sys.exit() # exit the program
Instant_MPG = self.get_mpg(result_set["speed"], result_set["maf"]) # calculate mpg
self.lcd.clear()
self.lcd.message('MPG ' + '%.2f' % Instant_MPG + '\n')
self.lcd.message('RPM ' + str(result_set["rpm"]))
log_data = log_data + "," + str(Instant_MPG)# add mpg to result string
self.log_csv.write(log_data + "\n") # write to csv
self.lcd.clear()
self.lcd.message('MPG ' + '%.2f' % Instant_MPG + '\n')
self.lcd.message('RPM ' + str(result_set["rpm"]))
log_data = log_data + "," + str(Instant_MPG)# add mpg to result string
self.log_csv.write(log_data + "\n") # write to csv
def ensure_dir(f): # Make a new directory for each day will make managing the logs easier
d = os.path.dirname(f)
if not os.path.exists(d): # check if directory exists if it does not create it
os.makedirs(d)
dir_date = datetime.now()
path = datetime.now().strftime('%d-%b-%Y')
ensure_dir("/home/pi/logs/" + path + "/") # ensure the dir is available
log_sensors = ["rpm", "speed", "throttle_pos", "load", "temp", "intake_air_temp", "manifold_pressure", "maf"]
logger = PiMyRide_Logger("/home/pi/logs/" + path + "/", log_sensors)
logger.connect()
if not logger.is_connected():
error = CharLCDPlate()
error.begin(16, 1)
error.message(" Not connected")
logger.record_data()
@staticmethod
def format_time(seconds):
return "%d:%02d" % (floor(seconds / 60), seconds % 60)
@staticmethod
def parse_invoice_barcode(barcode):
if len(barcode) != 13:
return barcode
invoice = barcode[1:-1]
return invoice.strip("0")
if __name__ == "__main__":
lcd = CharLCDPlate()
lcd.begin(16, 2)
def on_exit(tracker):
def signal_handler(signum, frame):
print("Caught signal %d" % signum)
tracker.add_event((tracker.EVENT_QUIT, signum))
return signal_handler
try:
settings = Settings()
tracker = PackingTimeTracker(settings, lcd)
import signal
signal.signal(signal.SIGTERM, on_exit(tracker))
#!/usr/bin/python
# coding=utf-8
from CharLCDPlate import NumberSelector, CharLCDPlate
from gaia.webservice.Webservice import Webservice
from gaia.webservice.Settings import Settings
from time import sleep
from barcode_scanner import BarcodeScanner
# Configuration
settings = Settings()
lcd = CharLCDPlate()
sel = NumberSelector(lcd)
scanner = BarcodeScanner.find_scanner()
# Create webservice and set last token from configuration
ws = Webservice(settings.get("url"))
ws.token = settings.get("token")
ws.username = settings.get("username")
ws.password = settings.get("password")
def packer_selected_callback(ws):
def callback(sel, number):
result = ws.call("Packaging", "getPackerInfo", {"packerId": number})
print(result)
lcd.clear()
if result["_success"]:
lcd.message("Hallo,\n%s!" % result["name"].encode("ascii", "replace"))
class PiMyRide_Logger():
"""THE class"""
def __init__(self, path, log_sensors):
self.lcd = CharLCDPlate()
self.lcd.begin(16, 1)
self.port = None
self.sensor_list = []
destination_file = path + (
datetime.now().strftime('%d%b-%H_%M_%S')) + ".csv"
self.log_csv = open(destination_file, "w", 128)
self.log_csv.write("Time,RPM,MPH,Throttle-Position,Calculated-Load,"
"Coolant-Temp,Air-Temp,Intake-Manifold-Pressure,"
"Air-Flow-Rate,Engine-Time,MPG\n")
for sensor in log_sensors:
self.add_log_sensor(sensor)
self.config_path = "/home/pi/PiMyRide/config.ini"
self.Config = ConfigParser.ConfigParser()
if not os.path.isfile(self.config_path):
open(self.config_path, "w")
self.Config.add_section("Settings")
self.Config.set("Settings", "logging_enabled", True)
self.Config.set("Settings", "mpg_enabled", True)
self.Config.set("Settings", "current_screen", 0)
self.Config.write(self.config_path)
self.config_path.close()
self.Config.read(self.config_path)
self.logging_enabled = self.Config.getboolean("Settings",
"logging_enabled")
self.mpg_enabled = self.Config.getboolean("Settings", "mpg_enabled")
self.current_screen = self.Config.get("Settings", "current_screen")
self.display_enabled = True
self.display_in_use = False
def exit(self, shutdown):
self.Config.set("Settings", "current_screen", self.current_screen)
self.Config.set("Settings", "logging_enabled", self.logging_enabled)
self.Config.set("Settings", "mpg_enabled", self.mpg_enabled)
self.Config.write(self.config_path)
print("Configuration saved.")
self.lcd.clear()
self.lcd.noDisplay()
if shutdown:
os.command("sudo shutdown now")
sys.exit()
elif not shutdown:
sys.exit()
def display_alert(self, message, alert_duration):
"""Take control of the LCD screen for displaying an alert"""
self.display_in_use = True
self.lcd.clear()
self.lcd.home()
self.lcd.message(message)
sleep(alert_duration)
self.display_in_use = False
def lcd_update(self, message, is_alert):
"""
Update the LCD screen. Allows for rapid updating of the screen,
while not stopping the program if an alert needs to be
displayed. Sensor data will not be shown while an alert is
being displayed
"""
if self.display_enabled and not self.display_in_use:
if not is_alert:
# Rapidly update sensor data readout
self.lcd.clear()
self.lcd.home()
self.lcd.message(message)
elif is_alert:
# Display alert using a new thread as to not
# intturpt the sensor logging.
alert_duration = 1.5
thread.start_new_thread(self.display_alert,
(message, alert_duration))
def connection_error(self, reason):
print("Connection error, disconnecting")
if not self.display_enabled:
self.lcd.display()
self.lcd_update("Connection error\n" + reason, False)
sleep(2)
while 1:
self.lcd_update("OK to reconnect\nDOWN to shutdown", False)
if self.lcd.buttonPressed(self.lcd.SELECT):
print("Select buttpn pressed, \
attempting to recconect...")
self.lcd_update("Reconnecting...", False)
self.start()
elif self.lcd.buttonPressed(self.lcd.DOWN):
print("Down buttpn pressed, shutting down...")
self.lcd_update("Shutting Down...", False)
sleep(1)
self.lcd.noDisplay()
self.exit(True)
elif self.lcd.buttonPressed(self.lcd.DOWN):
print("Up buttpn pressed, exiting...")
self.lcd_update("Exiting\nProgram...", False)
sleep(1)
self.lcd.clear()
self.lcd.noDisplay()
self.exit(False)
sleep(0.10)
def connect(self):
"""
Check all serial ports, print availible ports,
close on no open ports.
"""
port_names = scanSerial()
print(port_names)
for port in port_names:
self.port = obd_io.OBDPort(port, None, 2, 2)
if self.port.State == 0:
self.port.close()
self.port = None # No open ports close
else:
break # Break with connection
if self.port:
print("Connected")
self.lcd_update("Connected", False)
else:
print("Not Connected")
self.connection_error("Not connected")
def is_connected(self):
return self.port
def add_log_sensor(self, sensor):
"""
Add the sensors to read from from the list.
These sensors are in obd_sensors.py.
"""
for index, e in enumerate(obd_sensors.SENSORS):
if sensor == e.shortname:
self.sensor_list.append(index)
print("Logging Sensor: " + e.name)
break
def get_mpg(self, MPH, MAF):
"""Calculate MPG for petrol enignes, not for diesel"""
Instant_MPG = (14.7 * 7.273744 * 4.54 * MPH) / (3600 * MAF / 100)
return Instant_MPG
def record_data(self):
"""Actually start recording the data and doing stuff with it"""
if self.port is None:
return None
data_screens = [
["rpm", "speed"],
["throttle_pos", "load"],
["temp", "intake_air_temp"],
["manifold_pressure", "maf"],
["engine_time", "timing_advance"],
]
sensor_names = {
"rpm": "RPM",
"speed": "Speed",
"throttle_pos": "Throttle",
"load": "Load",
"temp": "Temp",
"intake_air_temp": "Intake Temp",
"manifold_pressure": "Pressure",
"maf": "MAF",
"engine_time": "Time",
"timing_advance": "Timing Advance",
"fuel_status": "Fuel Status",
"fuel_rate": "Fuel Rate",
"fuel_pressure": "Fuel Pressure"
}
print("Logging started")
self.lcd_update("Logging started", True)
while 1:
if self.display_enabled:
if self.lcd.buttonPressed(self.lcd.RIGHT):
# Go to next screen; setting is persistent
total_screens = len(self.data_screens) - 1
if self.current_screen < total_screens:
self.current_screen = self.current_screen + 1
elif self.current_screen == total_screens:
self.current_screen = 0
assert self.current_screen <= total_screens
if self.lcd.buttonPressed(self.lcd.LEFT):
# Go to previous screen; setting is persistent
total_screens = len(self.data_screens) - 1
if self.current_screen > 0:
self.current_screen = self.current_screen - 1
elif self.current_screen == 0:
self.current_screen = total_screens
if self.lcd.buttonPressed(self.lcd.UP):
# Enable/disable calculating MPG; persistent
if self.mpg_enabled:
self.mpg_enabled = False
print("MPG disabled")
self.lcd_update("MPG disabled", True)
elif not self.mpg_enabled:
self.mpg_enabled = True
print("MPG enabled")
self.lcd_update("MPG enabled", True)
if self.lcd.buttonPressed(self.lcd.DOWN):
# Enable/disable logging; persistent
if self.logging_enabled:
self.logging_enabled = False
print("Logging disabled")
self.lcd_update("Logging disabled", True)
elif not self.logging_enabled:
self.logging_enabled = True
print("Logging enabled")
self.lcd_update("Logging enabled", True)
if self.lcd.buttonPressed(self.lcd.SELECT):
# Turn off/on LCD; not persistent
if self.display_enabled:
self.display_enabled = False
self.lcd.clear()
self.lcd.home()
self.lcd.noDisplay()
print("Display disabled")
elif not self.display_enabled:
self.display_enabled = True
self.lcd.display()
print("Display enabled")
self.lcd_update("Display enabled", True)
log_time = datetime.now().strftime('%d%b-%H:%M:%S.%f')
log_data = log_time # Start of the logging string
result_set = {}
# Log all of sensor data from sensor_list
for index in self.sensor_list:
(name, value, unit) = self.port.sensor(index)
# print(self.port.sensor(index)) # Print the data
log_data = log_data + "," + str(value)
result_set[obd_sensors.SENSORS[index].shortname] = value
# Exit the program on "NODATA"/dropped connection
if (result_set["rpm"]
== "NODATA") or (result_set["speed"]
== "NODATA") or (result_set["temp"]
== "NODATA"):
self.connection_error("NODATA")
break
if self.mpg_enabled:
Instant_MPG = self.get_mpg(result_set["speed"],
result_set["maf"])
# Add mpg to log string
log_data = log_data + "," + str(Instant_MPG)
if self.logging_enabled:
self.log_csv.write(log_data + "\n")
if self.display_enabled:
# Show data on lcd
msg_line_1 = sensor_names[data_screens[self.current_screen][0]] +\
" " + str(round(result_set[data_screens[self.current_screen][0]], 2))
msg_line_2 = sensor_names[data_screens[self.current_screen][1]] +\
" " + str(round(result_set[data_screens[self.current_screen][1]], 2))
lcd_message = str(msg_line_1) + "\n" + str(msg_line_2)
self.lcd_update(lcd_message, False)
def start(self):
self.connect()
if not self.is_connected():
self.connection_error("Not connected")
self.record_data()
