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authorStanley Huang <stanleyhuangyc@gmail.com>2017-10-10 23:25:13 +1100
committerStanley Huang <stanleyhuangyc@gmail.com>2017-10-10 23:25:13 +1100
commit251bd01111ab0626fb861a391578445d9e6c7d26 (patch)
tree6aae4207f61431a3d881b2beaa2e0728bf4d419f /simple_obd_display
parent668e49d0471c9caa7243d51d416dde34bb0e00f3 (diff)
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Added simple OBD data display example sketch
Diffstat (limited to 'simple_obd_display')
-rw-r--r--simple_obd_display/simple_obd_display.ino105
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
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+/*************************************************************************
+* 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();
+ }
+}