Hi All,
This newbie needs help fine tuning coding for my 1st Arduino/Xbee project.
The idea is that a hand-held unit tells remote stations to activate 2 relays (a light that blinks & a bell)
I have the units talking, I am able to activate both relays thru Xbee.
I was able to come up with a blinking (without delay) for the light.
My main issue is how to turn off the bell relay. Basically as long as the bell button is pressed the bell should ring when the button is released it should stop. I had an if statement to send the "button is released" code to the remote station but all that did was jam-up the Xbee transmission - always saying the button is not pressed for ALL the times it's not - instead of when it just got released from having been just pressed.
My 2nd issue is figuring out the timing for the switch debouncing - I am having a hard time with recognition of the "real" button press.
Thank you.
Code for sender and receiver units below...
SENDER
// SoftwareSerial is used to communicate with the XBee
#include <SoftwareSerial.h>
SoftwareSerial XBee(0,1); // Arduino RX, TX (XBee Dout, Din)
// Declare pin numbers for feedback LEDs 1 thru 4
const int LED1_pin = 12;
const int LED2_pin = 11;
const int LED3_pin = 10;
const int LED4_pin = 9;
bool LED1_state = false; // false is OFF
bool LED2_state = false;
bool LED3_state = false;
bool LED4_state = false;
// Declare pin numbers for bell and light buttons
const int BTN_Bell = 8;
const int BTN_Light = 7;
int BTN_Light_state = LOW; // low = off
int BTN_Bell_state = LOW; // low = off
// Debounce buttons section
long lastBELL_bounceTime = 0; // last time button was pressed
long lastLIGHT_bounceTime = 0;
long debounceDELAY = 50;
void setup()
{
pinMode(LED1_pin, OUTPUT);
pinMode(LED2_pin, OUTPUT);
pinMode(LED3_pin, OUTPUT);
pinMode(LED4_pin, OUTPUT);
// Initialize XBee Software Serial port. Make sure the baud
// rate matches your XBee setting (9600 is default).
XBee.begin(9600);
}
void loop()
{
// button send portion to remote units
// on button press turn remote light (relay) on or off
BTN_Light_state = digitalRead(BTN_Light);
if ((millis() - lastLIGHT_bounceTime) > debounceDELAY) {
if (BTN_Light_state == HIGH) {
XBee.write('L'); // light btn is pressed
lastLIGHT_bounceTime = millis();
}
}
BTN_Bell_state = digitalRead(BTN_Bell);
if ((millis() - lastBELL_bounceTime) > debounceDELAY) {
if (BTN_Bell_state == HIGH) {
XBee.write('B'); // bell btn is pressed
lastBELL_bounceTime = millis();
}
else {
// XBee.write('O'); commented out for debuging // bell btn is released
}
}
// feedback section from remote units - who got the message ?
// turn corresponding LED on or off to know that remote light is on or off
if (XBee.available() > 0 ) {
char RemoteNum = XBee.read();
switch (RemoteNum) {
case '1': // If received '1'
LED1_state = !LED1_state;
digitalWrite(LED1_pin, LED1_state);
break;
case '2': // If received '2'
LED2_state = !LED2_state;
digitalWrite(LED2_pin, LED2_state);
break;
case '3': // If received '3'
LED3_state = !LED3_state;
digitalWrite(LED3_pin, LED3_state);
break;
case '4': // If received '4'
LED4_state = !LED4_state;
digitalWrite(LED4_pin, LED4_state);
break;
}
}
}
RECEIVER
// Receive signals from Xbee to trigger relays and send feedback
#include <SoftwareSerial.h>
SoftwareSerial XBee(0,1);
// Declare relay pin numbers to control external bell & light
const int LIGHTrelay_pin = 6;
const int BELLrelay_pin = 5;
// Declare variables to blink the light attached to the relay
int LIGHTrelay_state = HIGH; // OFF, since relay triggers on LOW
int LIGHTlast_state = LOW; // start with light off
unsigned long previousMillis = 0;
unsigned long interval = 750;
void setup()
{
pinMode(LIGHTrelay_pin, OUTPUT);
pinMode(BELLrelay_pin, OUTPUT);
digitalWrite(LIGHTrelay_pin, HIGH); // Set to off position initially
digitalWrite(BELLrelay_pin, HIGH); // Set to off position initially
// Baud rate MUST match XBee settings (as set in XCTU)
XBee.begin(9600);
}
void loop()
{
if (XBee.available() > 0) {
char Msg = XBee.read();
switch (Msg) {
case 'L': // L = light btn was pushed
LIGHTlast_state = !LIGHTlast_state; // Toggle the last state (should light be on or off)
XBee.write('1'); // Say that remote station 1 got the message
break;
case 'B': // B = bell btn was pushed
digitalWrite(BELLrelay_pin, LOW); // Relay triggers on low
break;
case 'O': // O = bell btn was released
digitalWrite(BELLrelay_pin, HIGH); // Relay triggers on low
break;
}
}
// Start a blinking routine for the light - if it's meant to be on
if ((millis() - previousMillis) > interval) {
previousMillis = millis();
if (LIGHTrelay_state == HIGH) { // Toggle relay status based on blink interval
LIGHTrelay_state = LOW;
}
else {
LIGHTrelay_state = HIGH;
}
}
if (LIGHTlast_state == HIGH) {
digitalWrite(LIGHTrelay_pin, LIGHTrelay_state); // turn it on or off depending on blinking interval
}
else {
digitalWrite(LIGHTrelay_pin, HIGH); // if btn was presssed to turn off the light keep it off.
}
}
