Some corrections/improvement

README.md

@@ -8,8 +8,9 @@ Get and Display car sensors
 
 - Raspberry Pi Zero or other Raspberry Pi version (3 or 4)
 - [Optional] UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output
-- Adafruit 0.56" 4-Digit 7-Segment Display w/I2C Backpack
+- Adafruit 0.56" 4-Digit 7-Segment Display w/I2C Backpack (or Adafruit Quad Alphanumeric Display - 0.54" Digits w/ I2C Backpack)
 - Voltage sensor (tested with Grove - Voltage Divider and ARCELI DC0-25V)
+- Temperature sensor (TMP36)
 - MCP3008 - 8-Channel 10-Bit ADC With SPI Interface
 - Momentary switch button
 

config.ini

@@ -8,17 +8,37 @@ CS = 8
 # GPIO Pin
 BUTTON = 5
 
-[voltage_sensor]
+[display]
-# grove or arceli
+# Model: 7x4, 14x4
-MODEL = grove
+MODEL = 7x4
+BRIGHTNESS = 0.5
+BLINK_RATE = 0
 
 [sensors]
-# voltage, temperature or pressure
+# Type: voltage, temperature, pressure
-SENSOR_0 = voltage
+# Voltage model: grove, arceli
-SENSOR_1 = temperature
+# Temperature model: tmp36
-SENSOR_2 = temperature
+# Pressure model: default
-SENSOR_3 = temperature
+SENSOR_0_TYPE = voltage
-SENSOR_4 = temperature
+SENSOR_0_MODEL = grove
-SENSOR_5 = temperature
+
-SENSOR_6 = temperature
+SENSOR_1_TYPE = temperature
-SENSOR_7 = pressure
+SENSOR_1_MODEL = tmp36
+
+SENSOR_2_TYPE = temperature
+SENSOR_2_MODEL = tmp36
+
+SENSOR_3_TYPE = temperature
+SENSOR_3_MODEL = tmp36
+
+SENSOR_4_TYPE = temperature
+SENSOR_4_MODEL = tmp36
+
+SENSOR_5_TYPE = temperature
+SENSOR_5_MODEL = tmp36
+
+SENSOR_6_TYPE = temperature
+SENSOR_6_MODEL = tmp36
+
+SENSOR_7_TYPE = pressure
+SENSOR_7_MODEL = default

display.py

@@ -1,16 +1,27 @@
 import board
 from adafruit_ht16k33.segments import Seg7x4
+from adafruit_ht16k33.segments import Seg14x4
 
 
 class Display:
     """Class for communicate with display"""
 
-    def __init__(self):
+    def __init__(self, config):
         i2c = board.I2C()
-        self.display = Seg7x4(i2c)
+        model = config.get('display', 'MODEL')
 
-        self.display.brightness = 1
+        self.display = None
-        self.display.blink_rate = 0
+
+        if (model == '7x4'):
+            self.display = Seg7x4(i2c)
+        elif (model == '14x4'):
+            self.display = Seg14x4(i2c)
+        else:
+            print('==== ERROR: Unknown display model ====')
+            return -1
+
+        self.display.brightness = float(config.get('display', 'BRIGHTNESS'))
+        self.display.blink_rate = int(config.get('display', 'BLINK_RATE'))
 
     def clear(self):
         self.display.fill(0)

raspicar.py

@@ -1,6 +1,5 @@
 import time
 import atexit
-import board
 import configparser
 import RPi.GPIO as GPIO
 
@@ -10,7 +9,7 @@ from display import Display
 config = configparser.RawConfigParser()
 config.read(r'./config.ini')
 
-display = Display()
+display = Display(config)
 sensor = Sensors(config)
 
 
@@ -54,7 +53,7 @@ def main():
         display.print(sensor.getValue())
 
         # Wait before next loop
-        time.sleep(10)
+        time.sleep(2)
 
 atexit.register(handleExit)
 

sensors.py

@@ -10,7 +10,6 @@ class Sensors:
         self.miso = int(config.get('adc', 'MISO'))
         self.clk = int(config.get('adc', 'CLK'))
         self.cs = int(config.get('adc', 'CS'))
-        self.voltage_sensor_model = config.get('voltage_sensor', 'MODEL')
         self.channel = 0
         self.config = config
 
@@ -60,7 +59,7 @@ class Sensors:
     # Convert value to volt
     def convertToVoltage(self, value):
         correction = 1
-        if (self.voltage_sensor_model == "arceli"):
+        if (self.getChannelModel() == "arceli"):
             correction = 2
 
         return value * (3.3 / 1024) * 5 / correction
@@ -76,7 +75,16 @@ class Sensors:
             return self.convertToCelcius(value)
 
     def getChannelType(self):
-        return self.config.get('sensors', 'SENSOR_' + str(self.channel))
+        return self.config.get(
+                'sensors',
+                'SENSOR_' + str(self.channel) + '_TYPE'
+        )
+
+    def getChannelModel(self):
+        return self.config.get(
+                'sensors',
+                'SENSOR_' + str(self.channel) + '_MODEL'
+        )
 
     def getChannel(self):
         return self.channel