That looks like a cut & paste error. You should be checking if the press is inside SIDEON_btn.
Wouldn't your code to turn on the side lights be almost identical to all the other buttons, just set the relay LOW to enable it? If you want them to toggle ON/OFF with each press, just introduce another variable to keep track of the current state and every time the SIDEON button is pressed, toggle it and set the relay
#include <TouchScreen.h>
#include <Adafruit_GFX.h> // Core graphic library
#include <MCUFRIEND_kbv.h>
MCUFRIEND_kbv tft;
#include <Wire.h>
#define MINPRESSURE 200
#define MAXPRESSURE 1000
const int relay1 = 53; // output for relay - LEFT SIDE LIGHTS
const int relay2 = 51; // output for relay - RIGHT SIDE LIGHT
const int relay3 = 49; // output for relay - LEFT INDICATOR
const int relay4 = 47; // output for relay - RIGHT INDICATOR
const int relay5 = 45; // output for relay - BRAKE LIGHTS
const int relay6 = 43; // output for relay - FOG LIGHT
const int relay7 = 41; // output for relay - SPARE...
const int relay8 = 39; // output for relay - SPARE...
#define FLASH_ON 600 // delay between FLASHES
#define FLASH_OFF 500 // delay between FLASHES
#define NUM_FLASH 8 // Number of Flashes for Indicators
#define ON 5000 // test time delay
const int XP = 8, XM = A2, YP = A3, YM = 9; //320x480 ID=0x9486
const int TS_LEFT = 129, TS_RT = 887, TS_TOP = 949, TS_BOT = 97;
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
Adafruit_GFX_Button SIDE_btn, SIDEON_btn, BRAKE_btn, LIND_btn, RIND_btn, FOG_btn, RSIDE_btn, LSIDE_btn;
int pixel_x, pixel_y; //Touch_getXY() updates global vars
boot Sideon = false;
bool Touch_getXY(void)
{
TSPoint p = ts.getPoint();
pinMode(YP, OUTPUT); //restore shared pins
pinMode(XM, OUTPUT);
digitalWrite(YP, HIGH); //because TFT control pins
digitalWrite(XM, HIGH);
bool pressed = (p.z > MINPRESSURE && p.z < MAXPRESSURE);
if (pressed) {
pixel_x = map(p.x, TS_LEFT, TS_RT, 0, tft.width()); //.kbv makes sense to me
pixel_y = map(p.y, TS_TOP, TS_BOT, 0, tft.height());
}
return pressed;
}
// R G B
#define BLACK 0x0000 // 0, 0, 0
#define RED 0xF800 // 255, 0, 0
#define WHITE 0xFFFF // 255, 255, 255
#define ORANGE 0xFD20 // 255, 165, 0
#define GREEN 0x0F00 // 0, 255, 0
void setup(void)
{
Wire.begin();
pinMode(relay1, OUTPUT); // SET RELAY AS OUTPUTS
pinMode(relay2, OUTPUT);
pinMode(relay3, OUTPUT);
pinMode(relay4, OUTPUT);
pinMode(relay5, OUTPUT);
pinMode(relay6, OUTPUT);
pinMode(relay7, OUTPUT);
pinMode(relay8, OUTPUT);
digitalWrite(relay1, HIGH); // SET AS HIGH AT POWER UP (OFF)
digitalWrite(relay2, HIGH);
digitalWrite(relay3, HIGH);
digitalWrite(relay4, HIGH);
digitalWrite(relay5, HIGH);
digitalWrite(relay6, HIGH);
digitalWrite(relay7, HIGH);
digitalWrite(relay8, HIGH);
uint16_t ID = tft.readID();
if (ID == 0xD3D3) ID = 0x9481; // write-only shield
tft.begin(ID);
tft.setRotation(0); //PORTRAIT
tft.fillScreen(BLACK); //CLEAR SCREEN
//----------------- BUTTON INFO -----------------
// POSITION INFO, border, background, writing colour, "text", size
SIDEON_btn.initButton(&tft, 160, 45, 240, 60, RED, WHITE, RED, "*SIDE ON*", 4);
BRAKE_btn.initButton(&tft, 160, 110, 240, 60, RED, WHITE, RED, "* BRAKE *", 4);
LIND_btn.initButton(&tft, 160, 175, 240, 60, WHITE, ORANGE, RED, "* IND ", 4);
RIND_btn.initButton(&tft, 160, 240, 240, 60, WHITE, ORANGE, RED, " IND *", 4);
LSIDE_btn.initButton(&tft, 160, 305, 240, 60, WHITE, RED, WHITE, "* SIDE ", 4);
RSIDE_btn.initButton(&tft, 160, 370, 240, 60, WHITE, RED, WHITE, " SIDE *", 4);
FOG_btn.initButton(&tft, 160, 435, 240, 60, GREEN, RED, GREEN, " FOG *", 4);
/*
SIDE_btn.initButton(&tft, 95, 45, 115, 60, RED, WHITE, RED, "* SIDE *", 4);
SIDE1_btn.initButton(&tft, 220, 45, 115, 60, RED, WHITE, RED, "* SIDE *", 4);
BRAKE_btn.initButton(&tft, 160, 110, 240, 60, RED, WHITE, RED, "* BRAKE *", 4);
LIND_btn.initButton(&tft, 160, 175, 240, 60, WHITE, ORANGE, RED, "* IND ", 4);
RIND_btn.initButton(&tft, 160, 240, 240, 60, WHITE, ORANGE, RED, " IND *", 4);
LSIDE_btn.initButton(&tft, 160, 305, 240, 60, WHITE, RED, WHITE, "* SIDE ", 4);
RSIDE_btn.initButton(&tft, 160, 370, 240, 60, WHITE, RED, WHITE, " SIDE *", 4);
FOG_btn.initButton(&tft, 160, 435, 240, 60, GREEN, RED, GREEN, " FOG *", 4);
*/
//SIDE_btn.drawButton(false);
SIDEON_btn.drawButton(false);
BRAKE_btn.drawButton(false);
LIND_btn.drawButton(false);
RIND_btn.drawButton(false);
RSIDE_btn.drawButton(false);
LSIDE_btn.drawButton(false);
FOG_btn.drawButton(false);
}
void loop() {
//----------------- BUTTON INFO -----------------
bool down = Touch_getXY();
// SIDE_btn.press(down && SIDE_btn.contains(pixel_x, pixel_y));
SIDEON_btn.press(down && SIDEON_btn.contains(pixel_x, pixel_y));
BRAKE_btn.press(down && BRAKE_btn.contains(pixel_x, pixel_y));
LIND_btn.press(down && LIND_btn.contains(pixel_x, pixel_y));
RIND_btn.press(down && RIND_btn.contains(pixel_x, pixel_y));
RSIDE_btn.press(down && RSIDE_btn.contains(pixel_x, pixel_y));
LSIDE_btn.press(down && LSIDE_btn.contains(pixel_x, pixel_y));
FOG_btn.press(down && FOG_btn.contains(pixel_x, pixel_y));
// if (SIDE_btn.justReleased())
// SIDE_btn.drawButton();
if (SIDEON_btn.justReleased())
SIDEON_btn.drawButton();
if (BRAKE_btn.justReleased())
BRAKE_btn.drawButton();
if (LIND_btn.justReleased())
LIND_btn.drawButton();
if (RIND_btn.justReleased())
RIND_btn.drawButton();
if (RSIDE_btn.justReleased())
RSIDE_btn.drawButton();
if (LSIDE_btn.justReleased())
LSIDE_btn.drawButton();
if (FOG_btn.justReleased())
FOG_btn.drawButton();
if (SIDEON_btn.justPressed()) {
SIDEON_btn.drawButton(true);
if (sideOn == true ) {
digitalWrite(relay1, HIGH );
sideOn = false;
}
else {
digitalWrite(relay1, LOW );
sideOn = true;
}
// ??????????????????? CODE TO PUT HERE (AND AT THE START) TO TOGGLE THIS OUTPUT -- relay1 WHEN THE
// ??????????????????? SIDE_btn AREA IS PRESSED ON tft SCREEN......
}
if (BRAKE_btn.justPressed()) {
BRAKE_btn.drawButton(true);
digitalWrite(relay5, LOW);
delay(ON);
digitalWrite(relay5, HIGH);
}
if (LSIDE_btn.justPressed()) {
LSIDE_btn.drawButton(true);
digitalWrite(relay1, LOW);
delay(ON);
digitalWrite(relay1, HIGH);
}
if (RSIDE_btn.justPressed()) {
RSIDE_btn.drawButton(true);
digitalWrite(relay2, LOW);
delay(ON);
digitalWrite(relay2, HIGH);
}
if (FOG_btn.justPressed()) {
FOG_btn.drawButton(true);
digitalWrite(relay6, LOW);
delay(ON);
digitalWrite(relay6, HIGH);
}
if (LIND_btn.justPressed()) {
LIND_btn.drawButton(true);
for (int i = 0; i < NUM_FLASH; i++) {
digitalWrite(relay3, LOW);
delay(FLASH_ON);
digitalWrite(relay3, HIGH);
delay(FLASH_OFF);
}
}
if (RIND_btn.justPressed()) {
RIND_btn.drawButton(true);
for (int i = 0; i < NUM_FLASH; i++) {
digitalWrite(relay4, LOW);
delay(FLASH_ON);
digitalWrite(relay4, HIGH);
delay(FLASH_OFF);
}
}
}