I didn't change the wiring. The DFPlayer is supplied by clean 5 Volts and RX and TX are correctly connected to the UNO. Otherwise it wouldn't play any sounds at all.
A "shot" is an infrared pulse with information triggered by a Laser Tag "weapon".
Here is the entire code:
#include <DFPlayerMini_Fast.h>
#include "SoftwareSerial.h"
#include <AltSoftSerial.h>
AltSoftSerial altSerial; // Receive = 8, Transmit = 9
SoftwareSerial HC12(4, 10);
DFPlayerMini_Fast myDFPlayer;
// Digital IO's
int triggerPin = 3; // Push button for primary fire. Low = pressed
int trigger2Pin = 16; // Push button for secondary fire. Low = pressed
int speakerPin = 14; // Direct output to piezo sounder/speaker
int HitVibration = 13; // Audio Trigger. Can be used to set off sounds recorded in the kind of electronics you can get in greetings card that play a custom message.
int lifePin = 6; // An analogue output (PWM) level corresponds to remaining life. Use PWM pin: 3,5,6,9,10 or 11. Can be used to drive LED bar graphs. eg LM3914N
int ammoPin = 5; // An analogue output (PWM) level corresponds to remaining ammunition. Use PWM pin: 3,5,6,9,10 or 11.
int hitPin = 7; // LED output pin used to indicate when the player has been hit.
int IRtransmitPin = 2; // Primary fire mode IR transmitter pin: Use pins 2,4,7,8,12 or 13. DO NOT USE PWM pins!! More info: http://j44industries.blogspot.com/2009/09/arduino-frequency-generation.html#more
//int IRtransmit2Pin = 8; // Secondary fire mode IR transmitter pin: Use pins 2,4,7,8,12 or 13. DO NOT USE PWM pins!!
int IRreceivePin = 12; // The pin that incoming IR signals are read from
int IRreceive2Pin = 15; // Allows for checking external sensors are attached as well as distinguishing between sensor locations (eg spotting head shots)
//Minimum gun requirements: trigger, receiver, IR led, hit LED.
// Player and Game details
int myTeamID = 1; // 1-7 (0 = system message)
int myPlayerID = 2; // Player ID
int myGameID = 1; // Interprited by configureGane subroutine; allows for quick change of game types.
int myWeaponID = 0; // Deffined by gameType and configureGame subroutine.
int myWeaponHP = 0; // Deffined by gameType and configureGame subroutine.
int maxAmmo = 0; // Deffined by gameType and configureGame subroutine.
int maxLife = 0; // Deffined by gameType and configureGame subroutine.
int automatic = 0; // Deffined by gameType and configureGame subroutine. Automatic fire 0 = Semi Auto, 1 = Fully Auto.
int automatic2 = 0; // Deffined by gameType and configureGame subroutine. Secondary fire auto?
//Incoming signal Details
int received[18]; // Received data: received[0] = which sensor, received[1] - [17] byte1 byte2 parity (Miles Tag structure)
int check = 0; // Variable used in parity checking
// Stats
int ammo = 0; // Current ammunition
int magazine = 15; // Magazine capacity
int life = 0; // Current life
// Code Variables
int timeOut = 0; // Deffined in frequencyCalculations (IRpulse + 50)
int FIRE = 0; // 0 = don't fire, 1 = Primary Fire, 2 = Secondary Fire
int TR = 0; // Trigger Reading
int LTR = 0; // Last Trigger Reading
int T2R = 0; // Trigger 2 Reading (For secondary fire)
int LT2R = 0; // Last Trigger 2 Reading (For secondary fire)
// Signal Properties
int IRpulse = 600; // Basic pulse duration of 600uS MilesTag standard 4*IRpulse for header bit, 2*IRpulse for 1, 1*IRpulse for 0.
int IRfrequency = 36; // Frequency in kHz Standard values are: 38kHz, 40kHz. Choose dependant on your receiver characteristics
int IRt = 0; // LED on time to give correct transmission frequency, calculated in setup.
int IRpulses = 0; // Number of oscillations needed to make a full IRpulse, calculated in setup.
int header = 4; // Header lenght in pulses. 4 = Miles tag standard
int maxSPS = 10; // Maximum Shots Per Seconds. Not yet used.
int TBS = 0; // Time between shots. Not yet used.
// Transmission data
int byte1[8]; // String for storing byte1 of the data which gets transmitted when the player fires.
int byte2[8]; // String for storing byte1 of the data which gets transmitted when the player fires.
int myParity = 0; // String for storing parity of the data which gets transmitted when the player fires.
// Received data
int memory = 10; // Number of signals to be recorded: Allows for the game data to be reviewed after the game, no provision for transmitting / accessing it yet though.
int hitNo = 0; // Hit number
// Byte1
int player[10]; // Array must be as large as memory
int team[10]; // Array must be as large as memory
// Byte2
int weapon[10]; // Array must be as large as memory
int hp[10]; // Array must be as large as memory
int parity[10]; // Array must be as large as memory
int HitPlayer = 0;
byte incomingByte;
const unsigned int READ_BUFFER_SIZE = 11; //Platz für 10 Zeichen + Terminator
unsigned long previousMillis;
const long Delay = 50;
void setup() {
// Serial coms set up to help with debugging.
altSerial.begin(9600);
Serial.begin(9600);
HC12.begin(9600);
Serial.println("Startup...");
Serial.println();
Serial.println(F("DFRobot DFPlayer Mini Demo"));
Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
if (!myDFPlayer.begin(altSerial)) { //Use softwareSerial to communicate with mp3.
Serial.println(F("Unable to begin:"));
Serial.println(F("1.Please recheck the connection!"));
Serial.println(F("2.Please insert the SD card!"));
while(true){
delay(0); // Code to compatible with ESP8266 watch dog.
}
}
Serial.println(F("DFPlayer Mini online."));
myDFPlayer.volume(25); //Set volume value. From 0 to 30
// Pin declarations
pinMode(triggerPin, INPUT);
pinMode(trigger2Pin, INPUT);
pinMode(speakerPin, OUTPUT);
//pinMode(audioPin, OUTPUT);
pinMode(lifePin, OUTPUT);
pinMode(ammoPin, OUTPUT);
pinMode(hitPin, OUTPUT);
pinMode(IRtransmitPin, OUTPUT);
//pinMode(IRtransmit2Pin, OUTPUT);
pinMode(IRreceivePin, INPUT);
pinMode(IRreceive2Pin, INPUT);
pinMode(HitVibration, OUTPUT);
int pin;
pin = digitalRead(triggerPin);
if(pin == 0) { // if trigger is pressed during startup, switch to max Ammo (GameID2)
myGameID = 2;
}
else if(pin == 1) {
myGameID = 1;
}
frequencyCalculations(); // Calculates pulse lengths etc for desired frequency
configureGame(); // Look up and configure game details
tagCode(); // Based on game details etc works out the data that will be transmitted when a shot is fired
digitalWrite(triggerPin, HIGH); // Not really needed if your circuit has the correct pull up resistors already but doesn't harm
digitalWrite(trigger2Pin, HIGH); // Not really needed if your circuit has the correct pull up resistors already but doesn't harm
digitalWrite(HitVibration, LOW);
myDFPlayer.play(3); //"Get ready to play.."
for (int i = 1;i < 254;i++) { // Loop plays start up noise
analogWrite(ammoPin, i);
playTone((3000-9*i), 2);
}
// Next 4 lines initialise the display LEDs
analogWrite(ammoPin, ((int) ammo));
analogWrite(lifePin, ((int) life));
lifeDisplay();
ammoDisplay();
Serial.println("Ready....");
}
// Main loop most of the code is in the sub routines
void loop(){
receiveIR();
if(FIRE != 0){
shoot();
ammoDisplay();
}
char* str = readLine(HC12);
if(str != nullptr)
{
Serial.print("Eingelesen: ");
Serial.println(str);
compare(str);
}
triggers();
}
// SUB ROUTINES
void ammoDisplay() { // Updates Ammo LED output
float ammoF;
ammoF = (260/maxAmmo) * ammo;
if(ammoF <= 0){ammoF = 0;}
if(ammoF > 255){ammoF = 255;}
analogWrite(ammoPin, ((int) ammoF));
}
void lifeDisplay() { // Updates Life LED output
float lifeF;
lifeF = (260/maxLife) * life;
if(lifeF <= 0){lifeF = 0;}
if(lifeF > 255){lifeF = 255;}
analogWrite(lifePin, ((int) lifeF));
}
char* readLine(Stream& stream)
{
static byte index;
static char buffer[READ_BUFFER_SIZE];
while (stream.available())
{
char c = stream.read();
//Serial.println("Stream:");
//Serial.println(c);
if (c == '\n') //wenn LF eingelesen
{
buffer[index] = '\0'; //String terminieren
index = 0;
return buffer; //melden dass String fertig eingelesen wurde
}
else if (c >= 32 && index < READ_BUFFER_SIZE - 1) //solange noch Platz im Puffer ist
{
buffer[index++] = c; //Zeichen abspeichern und Index inkrementieren
}
}
return nullptr;
}
void compare(char* str){
int ShooterID;
Serial.println("compare running!");
if(strstr(str, "Shooter")) {
Serial.println("Shooter received!");
char* ptr = strchr(str, ':');
ShooterID = atoi(ptr +1);
Serial.println("ShooterID:");
Serial.println(ShooterID);
if(ShooterID == myPlayerID) {
Serial.println("Shooter comparison true!");
myDFPlayer.play(4);
}
}
}
void receiveIR() { // Void checks for an incoming signal and decodes it if it sees one.
int error = 0;
if(digitalRead(IRreceivePin) == LOW){ // If the receive pin is low a signal is being received.
digitalWrite(hitPin,HIGH);
if(digitalRead(IRreceive2Pin) == LOW){ // Is the incoming signal being received by the head sensors?
received[0] = 1;
}
else{
received[0] = 0;
}
while(digitalRead(IRreceivePin) == LOW){
}
for(int i = 1; i <= 17; i++) { // Repeats several times to make sure the whole signal has been received
received[i] = pulseIn(IRreceivePin, LOW, 15000); // pulseIn command waits for a pulse and then records its duration in microseconds.
}
Serial.print("sensor: "); // Prints if it was a head shot or not.
Serial.print(received[0]);
Serial.print("...");
for(int i = 1; i <= 17; i++) { // Looks at each one of the received pulses
int receivedTemp[18];
receivedTemp[i] = 2;
if(received[i] > (IRpulse - 200) && received[i] < (IRpulse + 200)) {receivedTemp[i] = 0;} // Works out from the pulse length if it was a data 1 or 0 that was received writes result to receivedTemp string
if(received[i] > (IRpulse + IRpulse - 200) && received[i] < (IRpulse + IRpulse + 200)) {receivedTemp[i] = 1;} // Works out from the pulse length if it was a data 1 or 0 that was received
received[i] = 3; // Wipes raw received data
received[i] = receivedTemp[i]; // Inputs interpreted data
Serial.print(" ");
Serial.print(received[i]); // Print interpreted data results
}
Serial.println(""); // New line to tidy up printed results
// Parity Check. Was the data received a valid signal?
check = 0;
for(int i = 1; i <= 16; i++) {
if(received[i] == 1){check = check + 1;}
if(received[i] == 2){error = 1;}
}
check = check >> 0 & B1;
// Serial.println(check);
if(check != received[17]){error = 1;}
if(error == 0){Serial.println("Valid Signal");}
else{Serial.println("ERROR");}
if(error == 0){interpritReceived();}
digitalWrite(hitPin,LOW);
}
}
void interpritReceived(){ // After a message has been received by the ReceiveIR subroutine this subroutine decidedes how it should react to the data
if(hitNo == memory){hitNo = 0;} // hitNo sorts out where the data should be stored if statement means old data gets overwritten if too much is received
team[hitNo] = 0;
player[hitNo] = 0;
weapon[hitNo] = 0;
hp[hitNo] = 0;
// Next few lines Effectivly converts the binary data into decimal
// Im sure there must be a much more efficient way of doing this
if(received[1] == 1){team[hitNo] = team[hitNo] + 4;}
if(received[2] == 1){team[hitNo] = team[hitNo] + 2;}
if(received[3] == 1){team[hitNo] = team[hitNo] + 1;}
if(received[4] == 1){player[hitNo] = player[hitNo] + 16;}
if(received[5] == 1){player[hitNo] = player[hitNo] + 8;}
if(received[6] == 1){player[hitNo] = player[hitNo] + 4;}
if(received[7] == 1){player[hitNo] = player[hitNo] + 2;}
if(received[8] == 1){player[hitNo] = player[hitNo] + 1;}
if(received[9] == 1){weapon[hitNo] = weapon[hitNo] + 4;}
if(received[10] == 1){weapon[hitNo] = weapon[hitNo] + 2;}
if(received[11] == 1){weapon[hitNo] = weapon[hitNo] + 1;}
if(received[12] == 1){hp[hitNo] = hp[hitNo] + 16;}
if(received[13] == 1){hp[hitNo] = hp[hitNo] + 8;}
if(received[14] == 1){hp[hitNo] = hp[hitNo] + 4;}
if(received[15] == 1){hp[hitNo] = hp[hitNo] + 2;}
if(received[16] == 1){hp[hitNo] = hp[hitNo] + 1;}
parity[hitNo] = received[17];
Serial.print("Hit No: ");
Serial.print(hitNo);
Serial.print(" Player: ");
Serial.print(player[hitNo]);
Serial.print(" Team: ");
Serial.print(team[hitNo]);
Serial.print(" Weapon: ");
Serial.print(weapon[hitNo]);
Serial.print(" HP: ");
Serial.print(hp[hitNo]);
Serial.print(" Parity: ");
Serial.println(parity[hitNo]);
HC12.print("Shooter:");
HC12.println(player[hitNo]);
//HC12.write('\r');
//This is probably where more code should be added to expand the game capabilities at the moment the code just checks that the received data was not a system message and deducts a life if it wasn't.
if (player[hitNo] != 0){hit();}
hitNo++ ;
}
void shoot() {
if(FIRE == 1){ // Has the trigger been pressed?
//Serial.println("FIRE 1");
sendPulse(IRtransmitPin, 4); // Transmit Header pulse, send pulse subroutine deals with the details
delayMicroseconds(IRpulse);
for(int i = 0; i < 8; i++) { // Transmit Byte1
if(byte1[i] == 1){
sendPulse(IRtransmitPin, 1);
//Serial.print("1 ");
}
//else{Serial.print("0 ");}
sendPulse(IRtransmitPin, 1);
delayMicroseconds(IRpulse);
}
for(int i = 0; i < 8; i++) { // Transmit Byte2
if(byte2[i] == 1){
sendPulse(IRtransmitPin, 1);
// Serial.print("1 ");
}
//else{Serial.print("0 ");}
sendPulse(IRtransmitPin, 1);
delayMicroseconds(IRpulse);
}
if(myParity == 1){ // Parity
sendPulse(IRtransmitPin, 1);
}
sendPulse(IRtransmitPin, 1);
delayMicroseconds(IRpulse);
//Serial.println("");
//Serial.println("DONE 1");
myDFPlayer.play(1);
}
FIRE = 0;
ammo = ammo - 1;
magazine = magazine - 1;
if(magazine == 0) {
myDFPlayer.play(6);
magazine = 20;
}
}
void sendPulse(int pin, int length){ // importing variables like this allows for secondary fire modes etc.
// This void genertates the carrier frequency for the information to be transmitted
int i = 0;
int o = 0;
while( i < length ){
i++;
while( o < IRpulses ){
o++;
digitalWrite(pin, HIGH);
delayMicroseconds(IRt);
digitalWrite(pin, LOW);
delayMicroseconds(IRt);
}
}
}
void triggers() { // Checks to see if the triggers have been presses
LTR = TR; // Records previous state. Primary fire
LT2R = T2R; // Records previous state. Secondary fire
int Delay = 200;
int currentMillis;
int previousMillis;
currentMillis = millis();
if(currentMillis - previousMillis >= Delay) {
TR = digitalRead(triggerPin); // Looks up current trigger button state
previousMillis = currentMillis;
}
//T2R = digitalRead(trigger2Pin); // Looks up current trigger button state
// Code looks for changes in trigger state to give it a semi automatic shooting behaviour
if(TR != LTR && TR == LOW){
FIRE = 1;
}
if(T2R != LT2R && T2R == LOW){
FIRE = 2;
}
if(TR == LOW && automatic == 1){
FIRE = 1;
}
if(T2R == LOW && automatic2 == 1){
FIRE = 2;
}
if(FIRE == 1 || FIRE == 2){
if(ammo < 1){FIRE = 0; noAmmo();}
if(life < 1){FIRE = 0; dead();}
// Fire rate code to be added here
}
}
void configureGame() { // Where the game characteristics are stored, allows several game types to be recorded and you only have to change one variable (myGameID) to pick the game.
if(myGameID == 0){
myWeaponID = 1;
maxAmmo = 30;
ammo = 30;
maxLife = 3;
life = 3;
myWeaponHP = 1;
}
if(myGameID == 1){
myWeaponID = 1;
maxAmmo = 100;
ammo = 100;
maxLife = 10;
life = 10;
myWeaponHP = 1;
}
if(myGameID == 2){
myWeaponID = 1;
maxAmmo = 1000;
ammo = 100;
maxLife = 100;
life = 100;
myWeaponHP = 1;
}
}
void frequencyCalculations() { // Works out all the timings needed to give the correct carrier frequency for the IR signal
IRt = (int) (500/IRfrequency);
IRpulses = (int) (IRpulse / (2*IRt));
IRt = IRt - 4;
// Why -4 I hear you cry. It allows for the time taken for commands to be executed.
// More info: http://j44industries.blogspot.com/2009/09/arduino-frequency-generation.html#more
Serial.print("Oscilation time period /2: ");
Serial.println(IRt);
Serial.print("Pulses: ");
Serial.println(IRpulses);
timeOut = IRpulse + 50; // Adding 50 to the expected pulse time gives a little margin for error on the pulse read time out value
}
void tagCode() { // Works out what the players tagger code (the code that is transmitted when they shoot) is
byte1[0] = myTeamID >> 2 & B1;
byte1[1] = myTeamID >> 1 & B1;
byte1[2] = myTeamID >> 0 & B1;
byte1[3] = myPlayerID >> 4 & B1;
byte1[4] = myPlayerID >> 3 & B1;
byte1[5] = myPlayerID >> 2 & B1;
byte1[6] = myPlayerID >> 1 & B1;
byte1[7] = myPlayerID >> 0 & B1;
byte2[0] = myWeaponID >> 2 & B1;
byte2[1] = myWeaponID >> 1 & B1;
byte2[2] = myWeaponID >> 0 & B1;
byte2[3] = myWeaponHP >> 4 & B1;
byte2[4] = myWeaponHP >> 3 & B1;
byte2[5] = myWeaponHP >> 2 & B1;
byte2[6] = myWeaponHP >> 1 & B1;
byte2[7] = myWeaponHP >> 0 & B1;
myParity = 0;
for (int i=0; i<8; i++) {
if(byte1[i] == 1){myParity = myParity + 1;}
if(byte2[i] == 1){myParity = myParity + 1;}
myParity = myParity >> 0 & B1;
}
// Next few lines print the full tagger code.
Serial.print("Byte1: ");
Serial.print(byte1[0]);
Serial.print(byte1[1]);
Serial.print(byte1[2]);
Serial.print(byte1[3]);
Serial.print(byte1[4]);
Serial.print(byte1[5]);
Serial.print(byte1[6]);
Serial.print(byte1[7]);
Serial.println();
Serial.print("Byte2: ");
Serial.print(byte2[0]);
Serial.print(byte2[1]);
Serial.print(byte2[2]);
Serial.print(byte2[3]);
Serial.print(byte2[4]);
Serial.print(byte2[5]);
Serial.print(byte2[6]);
Serial.print(byte2[7]);
Serial.println();
Serial.print("Parity: ");
Serial.print(myParity);
Serial.println();
}
void playTone(int tone, int duration) { // A sub routine for playing tones like the standard arduino melody example
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
delayMicroseconds(tone);
}
}
void dead() { // void determines what the tagger does when it is out of lives
// Makes a few noises and flashes some lights
for (int i = 1;i < 254;i++) {
analogWrite(ammoPin, i);
playTone((1000+9*i), 2);
}
analogWrite(ammoPin, ((int) ammo));
analogWrite(lifePin, ((int) life));
Serial.println("DEAD");
for (int i=0; i<10; i++) {
analogWrite(ammoPin, 255);
digitalWrite(hitPin,HIGH);
delay (500);
analogWrite(ammoPin, 0);
digitalWrite(hitPin,LOW);
delay (500);
}
}
void noAmmo() { // Make some noise and flash some lights when out of ammo
digitalWrite(hitPin,HIGH);
playTone(500, 100);
playTone(1000, 100);
digitalWrite(hitPin,LOW);
myDFPlayer.play(5);
}
void hit() { // Make some noise and flash some lights when you get shot
digitalWrite(hitPin,HIGH);
digitalWrite(HitVibration, HIGH);
life = life - hp[hitNo];
Serial.print("Life: ");
Serial.println(life);
playTone(500, 500);
if(life <= 0){dead();}
digitalWrite(hitPin,LOW);
myDFPlayer.play(2);
digitalWrite(HitVibration, LOW);
lifeDisplay();
}
