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/*************************************************************************
* Testing sketch for Freematics OBD-II UART Adapter
* Reads and prints several OBD-II PIDs value
* Distributed under GPL v2.0
* Visit http://freematics.com for more information
* Written by Stanley Huang <stanleyhuangyc@gmail.com>
*************************************************************************/
#include <Arduino.h>
#include <Wire.h>
#include <SoftwareSerial.h>
#include <OBD.h>
// On Arduino Leonardo, Micro, MEGA or DUE, hardware serial can be used for output
// as OBD-II UART adapter connects to Serial1, otherwise we use software serial
SoftwareSerial mySerial(A2, A3);
//#define mySerial Serial
COBD obd;
void testOut()
{
static const char cmds[][6] = {"ATZ\r", "ATL1\r", "ATH0\r", "ATRV\r", "0100\r", "010C\r", "0902\r"};
char buf[128];
for (byte i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) {
const char *cmd = cmds[i];
mySerial.print("Sending ");
mySerial.println(cmd);
if (obd.sendCommand(cmd, buf, sizeof(buf))) {
char *p = strstr(buf, cmd);
if (p)
p += strlen(cmd);
else
p = buf;
while (*p == '\r') p++;
while (*p) {
mySerial.write(*p);
if (*p == '\r' && *(p + 1) != '\r')
mySerial.write('\n');
p++;
}
} else {
mySerial.println("Timeout");
}
delay(1000);
}
mySerial.println();
}
void readPIDSingle()
{
int value;
mySerial.print('[');
mySerial.print(millis());
mySerial.print(']');
mySerial.print("RPM=");
if (obd.read(PID_RPM, value)) {
mySerial.print(value);
}
mySerial.println();
}
void readPIDMultiple()
{
static const byte pids[] = {PID_SPEED, PID_ENGINE_LOAD, PID_THROTTLE, PID_COOLANT_TEMP, PID_INTAKE_TEMP};
int values[sizeof(pids)];
if (obd.read(pids, sizeof(pids), values) == sizeof(pids)) {
for (byte i = 0; i < sizeof(pids) ; i++) {
mySerial.print('[');
mySerial.print(millis());
mySerial.print(']');
mySerial.print((int)pids[i] | 0x100, HEX);
mySerial.print('=');
mySerial.println(values[i]);
}
}
}
void setup()
{
delay(500);
mySerial.begin(115200);
// this will begin serial
obd.begin();
// send some commands for testing and show response
testOut();
// initialize OBD-II adapter
do {
mySerial.println("Init...");
} while (!obd.init());
char buf[64];
if (obd.getVIN(buf, sizeof(buf))) {
mySerial.print("VIN:");
mySerial.println(buf);
}
delay(1000);
}
void loop()
{
readPIDSingle();
readPIDMultiple();
}
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