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#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"
Adafruit_7segment L_volts_disp = Adafruit_7segment();
Adafruit_7segment L_watts_disp = Adafruit_7segment();
Adafruit_7segment L_whr_disp = Adafruit_7segment();
Adafruit_7segment R_volts_disp = Adafruit_7segment();
Adafruit_7segment R_watts_disp = Adafruit_7segment();
Adafruit_7segment R_whr_disp = Adafruit_7segment();
// #include <avr/pgmspace.h>
// analog inputs
#define L_voltage_pin 0
#define L_current_pin 1
#define R_voltage_pin 2
#define R_current_pin 3
// digital outputs to relays, active LOW
#define L_relay_1 2 // Left Relay Board K1
#define L_relay_2 3 // Left Relay Board K2
#define L_relay_3 4 // Left Relay Board K3
#define L_relay_4 5 // Left Relay Board K4
#define R_relay_1 6 // Right Relay Board K1
#define R_relay_2 7 // Right Relay Board K2
#define R_relay_3 8 // Right Relay Board K3
#define R_relay_4 9 // Right Relay Board K4
#define L_gen_relay 10 // Left Relay Board K8
#define R_gen_relay 11 // Right Relay Board K8
#define L_winner 0 // Left Relay Board K5
#define R_winner 1 // Right Relay Board K5
#define aref_voltage 5000 // ADC reference 5V, ~5.04 for usb power, 4.99 for external power
#define L_volt_ratio 99 // 10.1:1 divider
#define R_volt_ratio 98 // 10.2:1 divider
#define sensitivity 66 // ACS712-30 current sensor 66mV/A
#define ECHO_TO_SERIAL 1
boolean game_start = false;
boolean game_over = false;
int blinkState = LOW;
unsigned long currentMillis;
long time_start = 0;
long timer = 0;
long time = 0;
long deltatime = 0;
long previousMillis = 0;
long interval = 200;
float L_mAh, R_mAh;
float L_Wh = 0;
float R_Wh = 0;
float L_voltage, R_voltage;
float L_gen_volts, R_gen_volts;
float L_current, R_current;
float L_gen_amps, R_gen_amps;
float L_power, R_power;
LiquidCrystal_I2C lcd(0x27,20,4); // set the LCD address to 0x20 for a 16 chars and 2 line display
uint16_t counter = 0;
//**************************************setup****************************************
void setup() {
L_volts_disp.begin(0x070); // green
L_watts_disp.begin(0x071); // red
L_whr_disp.begin(0x072); // yellow
R_volts_disp.begin(0x073); // green
R_watts_disp.begin(0x074); // red
R_whr_disp.begin(0x075); // yellow
// LiquidCrystal_I2C lcd(0x27,20,4); // set the LCD address to 0x27 for a 4x20 display
lcd.init(); // initialize the lcd
lcd.backlight();
// Serial.begin(9600); do not initialize if digital pins 0 or 1 are being used as outputs
// initialize relay driver outputs active low
pinMode(L_relay_1, OUTPUT);
digitalWrite(L_relay_1, HIGH);
pinMode(L_relay_2, OUTPUT);
digitalWrite(L_relay_2, HIGH);
pinMode(L_relay_3, OUTPUT);
digitalWrite(L_relay_3, HIGH);
pinMode(L_relay_4, OUTPUT);
digitalWrite(L_relay_4, HIGH);
pinMode(L_gen_relay, OUTPUT);
digitalWrite(L_gen_relay, HIGH);
pinMode(L_winner, OUTPUT);
digitalWrite(L_winner, HIGH);
pinMode(R_relay_1, OUTPUT);
digitalWrite(R_relay_1, HIGH);
pinMode(R_relay_2, OUTPUT);
digitalWrite(R_relay_2, HIGH);
pinMode(R_relay_3, OUTPUT);
digitalWrite(R_relay_3, HIGH);
pinMode(R_relay_4, OUTPUT);
digitalWrite(R_relay_4, HIGH);
pinMode(R_gen_relay, OUTPUT);
digitalWrite(R_gen_relay, HIGH);
pinMode(R_winner, OUTPUT);
digitalWrite(R_winner, HIGH);
lcd.print("PowerMeter v2.0");
lcd.setCursor(0,1);
lcd.print("(c)2014 IOLANI");
delay(200);
lcd.clear();
lcd.setCursor(7,0);
lcd.print("V");
lcd.setCursor(7,1);
lcd.print("A");
lcd.setCursor(7,2);
lcd.print("W");
lcd.setCursor(7,3);
lcd.print("Wh");
L_mAh = 0;
R_mAh = 0;
L_Wh = 0;
R_Wh = 0;
// load_test(); // Test Code - cycle all relays one at a time for 1 second, test displays
}
//**************************************************end setup***********************************************
//**************************************************loop****************************************************
void loop() {
while (!game_start) {
get_voltage();
get_current();
get_power();
currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
display_R_VP();
display_L_VP();
disp_R_Wh();
disp_L_Wh();
display_LCD();
}
time_start = millis();
while((R_gen_volts >= 13.0 && R_gen_volts <= 29.0) && (L_gen_volts >= 13.0 && L_gen_volts <= 29.0) && !game_start) {
get_voltage();
get_current();
get_power();
currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
display_R_VP();
display_L_VP();
disp_R_Wh();
disp_L_Wh();
display_LCD();
}
timer = millis()-time_start;
if(timer > 7000) {
game_start = true;
}
}
}
// committed to game start here
while(game_start) {
get_voltage();
get_current();
get_power();
if(R_gen_volts <= 29.0) {
digitalWrite(R_gen_relay, LOW); // turn on main relay (active low)
}
else {
digitalWrite(R_gen_relay, HIGH); // turn off main relay (active low)
}
if(L_gen_volts <= 29.0) {
digitalWrite(L_gen_relay, LOW); // turn on main relay (active low)
}
else {
digitalWrite(L_gen_relay, HIGH); // turn off main relay (active low)
}
// display_L_VP(); // display volts, current, power on left side 7-segment displays
deltatime = millis() - time;
time = millis();
currentMillis = millis();
// count Ah/Wh after game has started
R_mAh = milliamphourscalc(deltatime, R_gen_amps) + R_mAh;
R_Wh = watthourscalc(deltatime, R_power) + R_Wh;
L_mAh = milliamphourscalc(deltatime, L_gen_amps) + L_mAh;
L_Wh = watthourscalc(deltatime, L_power) + L_Wh;
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
display_R_VP();
display_L_VP();
disp_R_Wh(); // display Whr
disp_L_Wh(); // display Whr
display_LCD();
}
digitalWrite(R_relay_1, LOW); //turn-on right level 1 load
digitalWrite(L_relay_1, LOW); //turn-on left level 1 load
if(R_Wh >= 0.25) {
digitalWrite(R_relay_2, LOW);
}
if(L_Wh >= 0.25) {
digitalWrite(L_relay_2, LOW);
}
if(R_Wh >= 0.75) {
digitalWrite(R_relay_3, LOW);
}
if(L_Wh >= 0.75) {
digitalWrite(L_relay_3, LOW);
}
if(R_Wh >= 1.50) {
digitalWrite(R_relay_4, LOW);
}
if(L_Wh >= 1.50) {
digitalWrite(L_relay_4, LOW);
}
if((R_Wh >= 2.00) && (L_Wh <= 2.00)) { //right player wins
game_over = true;
digitalWrite(R_winner, LOW);
digitalWrite(R_relay_4, HIGH);
digitalWrite(L_relay_4, HIGH);
delay(2000);
digitalWrite(R_relay_3, HIGH);
digitalWrite(L_relay_3, HIGH);
delay(2000);
digitalWrite(R_relay_2, HIGH);
digitalWrite(L_relay_2, HIGH);
delay(2000);
digitalWrite(R_relay_1, HIGH);
digitalWrite(L_relay_1, HIGH);
// dispense candy (drive one of the unused relays with low voltage (3V) DC/DC converter
digitalWrite(R_winner, LOW);
while(1) {
get_voltage();
get_current();
get_power();
currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
display_R_VP();
display_LCD();
}
}
}
if((L_Wh >= 2.00) && (R_Wh <= 2.00)) { //right player wins
game_over = true;
digitalWrite(L_winner, LOW);
digitalWrite(R_relay_4, HIGH);
digitalWrite(L_relay_4, HIGH);
delay(2000);
digitalWrite(R_relay_3, HIGH);
digitalWrite(L_relay_3, HIGH);
delay(2000);
digitalWrite(R_relay_2, HIGH);
digitalWrite(L_relay_2, HIGH);
delay(2000);
digitalWrite(R_relay_1, HIGH);
digitalWrite(L_relay_1, HIGH);
// dispense candy (drive one of the unused relays with low voltage (3V) DC/DC converter
digitalWrite(L_winner, HIGH);
while(1) {
get_voltage();
get_current();
get_power();
currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
display_R_VP();
display_LCD();
}
}
}
}
}
//*****************************************************************end loop**************************************************
// functions are ordered by sequential use in void loop()
//*******************************************************************get_voltage************************************************
// averages every 10 readings from a specified analog input pin
void get_voltage() {
L_voltage = avgByTen(L_voltage_pin); //raw analog input data
R_voltage = avgByTen(R_voltage_pin); // raw analog input data
L_gen_volts = L_voltsCalc(L_voltage); // scaled generator input voltage (10.1 : 1 divider)
R_gen_volts = R_voltsCalc(R_voltage); // scaled generator input voltage (10.2 : 1 divider)
}
//*****************************************************************end get_voltage************************************************
//*******************************************************************get_current************************************************
// averages every 10 readings from a specified analog input pin
void get_current() {
L_current = avgByTen(L_current_pin);
R_current = avgByTen(R_current_pin);
L_gen_amps = currentCalc(L_current);
R_gen_amps = currentCalc(R_current);
}
//*****************************************************************end get_current************************************************
//*******************************************************************get_power************************************************
void get_power() {
L_power = powercalc(L_gen_volts, L_gen_amps);
R_power = powercalc(R_gen_volts, R_gen_amps);
}
//*****************************************************************end get_power************************************************
void display_L_VP() {
L_volts_disp.printFloat(L_gen_volts, 2, 10);
L_volts_disp.writeDigitRaw(2, 0x02); // print colon for decimal point
L_volts_disp.writeDisplay();
L_watts_disp.print(int(L_power));
L_watts_disp.writeDisplay();
}
void display_R_VP() {
R_volts_disp.printFloat(R_gen_volts, 2, 10);
R_volts_disp.writeDigitRaw(2, 0x02); // print colon for decimal point
R_volts_disp.writeDisplay();
R_watts_disp.print(int(R_power));
R_watts_disp.writeDisplay();
}
//*******************************************************************averaging************************************************
// averages every 10 readings from a specified analog input pin
float avgByTen(uint8_t pin) {
int reading = 0;
for (int i=0; i<10; i++){
analogRead(pin); //arduino alalog in pin
reading += analogRead(pin);
}
return reading / 10;
}
//*****************************************************************end averaging************************************************
//******************************************************************** L_generator voltage calculation************************************************
// computes scaled voltage based on 10.1:1 divider
float L_voltsCalc (float voltageReading) {
return ((voltageReading * aref_voltage / 1024)/ L_volt_ratio); //pack voltage in mV ~10.1:1 voltage divider
}
//*******************************************************************end L_generator voltage calculation*******************************************
//******************************************************************** R_generator voltage calculation************************************************
// computes scaled voltage based on 10.2:1 divider
float R_voltsCalc (float voltageReading) {
return ((voltageReading * aref_voltage / 1024)/ R_volt_ratio); //pack voltage in mV ~10.2:1 voltage divider
}
//*******************************************************************end R_generator voltage calculation*******************************************
//*********************************************************************current calculation*****************************************
//calculates current
float currentCalc(float currentReading) {
return ((currentReading * aref_voltage / 1024) - 2495) / 66; // current in Amps (ACS712-30A, 66mV/A)
}
//**********************************************************************end current calculation*************************************
//*****************************************************************power**********************************************************
//calculates power
float powercalc(float battery, float current) {
return ((battery * current));
}
//*****************************************************************end power********************************************************
//****************************************************************amphours**********************************************************
//calculates milliamphours
float milliamphourscalc(long deltatime, float current){
return ((deltatime * current *1000)/3600000);
}
//***************************************************************end amphours*******************************************************
//***************************************************************watthours**********************************************************
//calculates watthours
float watthourscalc(long deltatime, float power){
return ((deltatime * power)/3600000);
}
//***************************************************************end watthours******************************************************
//***************************************************************display L_Wh**********************************************************
void disp_L_Wh() {
if (L_Wh>=0.00 && L_Wh<=0.09) {
L_whr_disp.printFloat(L_Wh, 2, 10); // void Adafruit_7segment::printFloat(double n, uint8_t fracDigits, uint8_t base)
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitNum(1, 0); // leading zero in ones position
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitNum(3, 0); //leading zero in tenths position
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitRaw(2, 0x02); // center colon - cover top dot for decimal point
L_whr_disp.writeDisplay();
}
if (L_Wh>=0.10 && L_Wh<=0.99) {
L_whr_disp.printFloat(L_Wh, 2, 10);
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitNum(1, 0); // leading zero in ones position
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitRaw(2, 0x02); // center colon - cover top dot for decimal point
L_whr_disp.writeDisplay();
}
if (L_Wh>0.99) {
L_whr_disp.printFloat(L_Wh, 2, 10);
L_whr_disp.writeDisplay();
L_whr_disp.writeDigitRaw(2, 0x02);
L_whr_disp.writeDisplay();
}
}
//***************************************************************end display L_Wh**********************************************************
//***************************************************************display R_Wh**********************************************************
void disp_R_Wh() {
if (R_Wh>=0.00 && R_Wh<=0.09) {
R_whr_disp.printFloat(R_Wh, 2, 10); // void Adafruit_7segment::printFloat(double n, uint8_t fracDigits, uint8_t base)
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitNum(1, 0); // leading zero in ones position
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitNum(3, 0); //leading zero in tenths position
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitRaw(2, 0x02); // center colon - cover top dot for decimal point
R_whr_disp.writeDisplay();
}
if (R_Wh>=0.10 && R_Wh<=0.99) {
R_whr_disp.printFloat(R_Wh, 2, 10);
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitNum(1, 0); // leading zero in ones position
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitRaw(2, 0x02); // center colon - cover top dot for decimal point
R_whr_disp.writeDisplay();
}
if (R_Wh>0.99) {
R_whr_disp.printFloat(R_Wh, 2, 10);
R_whr_disp.writeDisplay();
R_whr_disp.writeDigitRaw(2, 0x02);
R_whr_disp.writeDisplay();
}
}
//***************************************************************end display R_Wh**********************************************************
//****************************************************************display_LCD**********************************************************
void display_LCD() {
lcd.backlight();
lcd.setCursor(0,0);
lcd.print(L_gen_volts,1);
lcd.setCursor(0,1);
lcd.print(L_gen_amps,1);
lcd.setCursor(0,2);
lcd.print(int (L_power));
lcd.setCursor(0,3);
lcd.print(L_Wh);
lcd.setCursor(11,0);
lcd.print(R_gen_volts,1);
lcd.setCursor(11,1);
lcd.print(R_gen_amps,1);
lcd.setCursor(11,2);
lcd.print(int (R_power));
lcd.setCursor(11,3);
lcd.print(R_Wh);
}
//***************************************************************end display_LCD*******************************************************
//*******************************************************load_test*********************************************************
void load_test() {
// Test Code - cycle all relays one at a time for 1 second, test displays
delay(2000);
digitalWrite(L_gen_relay, LOW); // turn on main relay (active low)
get_voltage();
get_current();
get_power();
display_L_VP();
currentMillis = millis();
deltatime = millis() - time;
time = millis();
// count Ah/Wh after game has started
L_mAh = milliamphourscalc(deltatime, L_gen_amps) + L_mAh;
L_Wh = watthourscalc(deltatime, L_power) + L_Wh;
display_L_VP(); // display volts, current, power on left side 7-segment displays
digitalWrite(L_relay_1, LOW); //turn-on level 1 load
delay(1000);
digitalWrite(L_relay_1, HIGH);
delay(250);
digitalWrite(L_relay_2, LOW);
delay(1000);
digitalWrite(L_relay_2, HIGH);
delay(250);
digitalWrite(L_relay_3, LOW);
delay(1000);
digitalWrite(L_relay_3, HIGH);
delay(250);
digitalWrite(L_relay_4, LOW);
delay(1000);
digitalWrite(L_relay_4, HIGH);
delay(250);
digitalWrite(L_winner, LOW);
delay(1000);
digitalWrite(L_winner, HIGH);
delay(250);
get_voltage();
get_current();
get_power();
display_L_VP();
display_R_VP();
}
//*******************************************************end load_test*********************************************************
//*******************************************************display trip time*********************************************************
// prints the time to the lcd screen
// format: 00:00:00 (hours:minutes:seconds)
void print_time() {
int sec = (millis())/1000;
int second = sec%60;
int minut = (sec/60)%60;
int hour = sec/3600;
lcd.setCursor(12, 0);
if(hour > 0) {
lcd.print(hour);
lcd.print(":");
}
if(minut < 10)
lcd.print("0");
lcd.print(minut);
lcd.print(":");
if(second < 10)
lcd.print("0");
lcd.print(second); // print the number of seconds since reset:
}
//******************************************************end display trip time*******************************************************