Added simple OBD data display example sketch

1 files changed, 105 insertions, 0 deletions

diff --git a/simple_obd_display/simple_obd_display.ino b/simple_obd_display/simple_obd_display.ino
new file mode 100644
index 0000000..ca36236
--- /dev/null
+++ b/simple_obd_display/simple_obd_display.ino
@@ -0,0 +1,105 @@
+/*************************************************************************
+* Simple OBD Data Display
+* Works with any Arduino board connected with SH1106 128*64 I2C OLED and
+* Freematics OBD-II UART Adapter - https://freematics.com/products
+* Distributed under public domain
+* Written by Stanley Huang <stanley@freematics.com.au>
+*************************************************************************/
+
+#include <Wire.h>
+#include <OBD2UART.h>
+#include <MicroLCD.h>
+
+LCD_SH1106 lcd;
+COBD obd;
+
+void reconnect()
+{
+  lcd.clear();
+  lcd.setFontSize(FONT_SIZE_MEDIUM);
+  lcd.print("Reconnecting");
+  //digitalWrite(SD_CS_PIN, LOW);
+  for (uint16_t i = 0; !obd.init(); i++) {
+    if (i == 5) {
+      lcd.clear();
+    }
+    delay(3000);
+  }
+}
+
+void showData(byte pid, int value)
+{
+  switch (pid) {
+  case PID_RPM:
+    lcd.setCursor(64, 0);
+    lcd.setFontSize(FONT_SIZE_XLARGE);
+    lcd.printInt((unsigned int)value % 10000, 4);
+    break;
+  case PID_SPEED:
+    lcd.setCursor(0, 0);
+    lcd.setFontSize(FONT_SIZE_XLARGE);
+    lcd.printInt((unsigned int)value % 1000, 3);
+    break;
+  case PID_THROTTLE:
+    lcd.setCursor(88, 5);
+    lcd.setFontSize(FONT_SIZE_MEDIUM);
+    lcd.printInt(value % 100, 3);
+    lcd.setFontSize(FONT_SIZE_SMALL);
+    lcd.print(" %");
+    break;
+  case PID_ENGINE_LOAD:
+    lcd.setCursor(12, 5);
+    lcd.setFontSize(FONT_SIZE_MEDIUM);
+    lcd.printInt(value, 3);
+    lcd.setFontSize(FONT_SIZE_SMALL);
+    lcd.print(" %");
+    break;
+  }
+}
+
+void initScreen()
+{
+  lcd.clear();
+  lcd.setFontSize(FONT_SIZE_SMALL);
+  lcd.setCursor(24, 3);
+  lcd.print("km/h");
+  lcd.setCursor(110, 3);
+  lcd.print("rpm");
+  lcd.setCursor(0, 7);
+  lcd.print("ENGINE LOAD");
+  lcd.setCursor(80, 7);
+  lcd.print("THROTTLE");
+}
+
+void setup()
+{
+  lcd.begin();
+  lcd.setFontSize(FONT_SIZE_MEDIUM);
+  lcd.println("OBD DISPLAY");
+
+  delay(500);
+  obd.begin();
+
+  lcd.println();
+  lcd.println("Connecting...");
+  while (!obd.init());
+  initScreen();
+}
+
+void loop()
+{
+  static byte pids[]= {PID_RPM, PID_SPEED, PID_ENGINE_LOAD, PID_THROTTLE};
+  static byte index = 0;
+  byte pid = pids[index];
+  int value;
+  // send a query to OBD adapter for specified OBD-II pid
+  if (obd.readPID(pid, value)) {
+      showData(pid, value);
+  }
+  index = (index + 1) % sizeof(pids);
+
+  if (obd.errors >= 2) {
+      reconnect();
+      setup();
+  }
+}