Hi. Im having trouble with this code. I'm getting a strange message: unexpected char: "i" when i try to run the code
in
Integration and Hardware
•
3 months ago
Hi. Im having trouble with this code. I'm getting a strange message,
unexpected char: "i" ,when i try to run the code. the program highlights that piece of code that is highlighted below, but i dont see the problem with it. also, im trying to download the code to an Arduino which I dont seem to be doing correctly. can someone help me out with that too. The code is below. Thanks for your help.
/*
////////////////////////////////////////////////
[ Arduino Cycle Computer ] Version A0.1
>> Original written by Adam O'Hern
>> Modified by Alexdlp for Instructables 2011
////////////////////////////////////////////////
*/
#include <LiquidCrystal.h>
#include <LcdBarGraph.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
byte lcdNumCols = 15; // -- number of columns in the LCD
LcdBarGraph lbg(&lcd, lcdNumCols); // -- creating
int LED = 13; //pin for the LED
int SensorPin = A0; //input for REED SensorPin
int rim = 2035; //circumference of wheel in mm
int val = 0; // used to store input value
int previousVal = 0; // lets not be too repetitious
int debounce = 10; // the debounce time, increase if the output flickers
int cycles = 1; // total number of revolutions
float currentSpeed = 0; // current speed in MPH
float averageSpeed = 0; // average speed since "newRide" was true
unsigned long revTimer; // create a timer that tells us how long we go between pulses,
unsigned long serialTimer; // and one for how long it's been since we sent anything over serial
unsigned long rideTimer; // total time since "newRide" was true
boolean activeRiding = false; // is the bike moving?
boolean activityChange = true; // just a way of keeping track of how long we're inactive
long inactivityTimer; // millis() on which we began inactivity
long activeRidingOffset = 0; // time subtracted from total riding time when calculating average speed
boolean newRide = true; // true if we haven't moved in half an hour or more
float rideDistance = 0; // total distance traveled since "newRide" was true
void setup() {
lcd.begin(16, 2);
pinMode(LED, OUTPUT); // tell arduino LED port is an output,
pinMode(SensorPin, INPUT); // and SensorPin port is input
Serial.begin(9600); // start a serial session
revTimer = millis(); // start pulse timer
serialTimer = millis(); // start serial timer
rideTimer = millis(); // start ride timer
}
void loop(){
if(!activeRiding) {
if(activityChange) {
inactivityTimer = millis();
activityChange = false;
}
}
else {
if(activityChange) {
activeRidingOffset += millis() - inactivityTimer;
activityChange = false;
}
}
if (analogRead(SensorPin) > 600) {
val = HIGH;
}
else {
val = LOW;
}
if (val==LOW) { // check whether input is LOW (magnet is NOT in range of reed SensorPin)
digitalWrite(LED, LOW); // turn LED off
previousVal = LOW; // allow the next "pulse" to be counted
}
else{
digitalWrite(LED, HIGH); // turn LED off
lcd.setCursor(15, 0); // Set cursor to the top right of LCD
lcd.print("*"); // Print a blank character or 'space'
delay(100);
lcd.setCursor(15, 0); // Set cursor to the top right of LCD
lcd.print(" "); // Print a blank character or 'space'
if (previousVal != HIGH && millis() - revTimer > debounce) { // we've got a pulse!
pulse();
}
previousVal = HIGH; // (in case the magnet is in range of the SensorPin while sitting still)
}
// if it's been too long since the last pulse, assume we're not moving.
if(millis()-revTimer > 2000) {
currentSpeed = 0;
if(activeRiding) {
activityChange = true;
activeRiding = false;
}
}
// if it's been more than fifteen minutes...
if (millis() - revTimer > 15*60*1000) {
// we'll assume it's a new riding session & zero everything out at next pulse.
newRide = true;
}
}
void pulse() {
if(newRide) {
cycles = 0;
averageSpeed = 0;
rideTimer = millis();
rideDistance = 0;
}
cycles++; // The wheel has obviously turned another revolution
rideDistance = (float) rim*cycles/1000; // distance in meters,
rideDistance = rideDistance * 0.000621371192; // converted to miles
currentSpeed = (float) (millis() - revTimer)*0.001; // Convert time elapsed to milliseconds to seconds
currentSpeed = rim/currentSpeed; // S = d/t: Rim circumference divided by time elapsed
currentSpeed = currentSpeed*0.002237; // MPH Conversion: 1 mm/s = 0.001 m/s * 3600 s/hr * 1 mile / 1609 m = 0.002237 mi/hr
// time ridden since "newRide", in hours, not including inactive time
unsigned long activeRidingMillis = millis() - rideTimer - activeRidingOffset;
float activeRidingHours = (float) activeRidingMillis / 1000/60/60; // convert to hours
averageSpeed = rideDistance / activeRidingHours;
revTimer = millis(); // remember the current moment for speed calculations next time around
sendStats(); // Tell Processing what's going on
newRide = false;
if(!activeRiding) {
activityChange = true;
activeRiding = true;
}
}
void sendStats() {
Serial.print("rideDistance=");
Serial.print(rideDistance,2);
Serial.print("¤tSpeed=");
Serial.print(currentSpeed,1);
lcd.setCursor(0, 1);
lcd.print("Speed = ");
lcd.print(currentSpeed,1);
lcd.setCursor(13, 1);
lcd.print("mph");
lbg.drawValue(currentSpeed, 35);
Serial.print("&averageSpeed=");
Serial.print(averageSpeed,2);
// send a linefeed character, telling Processing that we're done transmitting.
Serial.print(10,BYTE);
serialTimer = millis();
}
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