Screen now prints only when changed

code/code.ino

@@ -10,7 +10,7 @@
 
 //Components
 LiquidCrystal_I2C lcd(0x27, 16, 2);
-RF24 radio(9,10);
+RF24 radio(9,10); // CE, CSN
 
 //Settings
 //byte unsigned address = 1;
@@ -22,6 +22,9 @@ const String seed = "1305b5cfa1a59e9789de"; // "random" seed ;)
 String password;
 bool mode = 0; // 0 = transmit, 1 = recieve, bool is 2 bytes less than byte :)
 bool encryption = 1; // will the trafic be encrypted?
+byte value = 0;
+
+bool isScreenChanged = true; // we must display first time
 
 //Switch screen button
 const byte switchScreenButton = 2;
@@ -49,11 +52,11 @@ void setup() {
   
   //Setting up a radio module
   radio.begin();
-  radio.setPALevel(RF24_PA_MIN);
+  radio.setPALevel(RF24_PA_MAX);
   radio.setChannel(0x00);
   radio.setDataRate(RF24_250KBPS);
   switchMode(); //default is recieving
-//  switchMode();
+  switchMode();
   //Setting up a LCD
   lcd.init();
   lcd.backlight();
@@ -66,7 +69,8 @@ void loop() {
 
   if (!mode) {// transmit
     const char text[] = "Hello world!";
-    radio.write(&text, sizeof(text));
+    if (radio.write(&text, sizeof(text))) Serial.println("данные успешно отправлены");
+    else Serial.println("хуй там");
   } else { // receive
     if (radio.available()) {
       char text[32] = "";
@@ -81,10 +85,12 @@ void loop() {
   
   
   if (switchButtonValue == 0 && switchScreenLast == 1) {
-    screen = screen < 3? screen + 1 : 0; 
+    screen = screen < 3? screen + 1 : 0;
+    isScreenChanged = true;
   }
 
   if ((decreaseValue == 0 && decreaseButtonLast == 1) || increaseValue == 0 && increaseButtonLast == 1) {
+    isScreenChanged = true;
     switch (screen) {
       case 0:
         mode = !mode;
@@ -114,11 +120,12 @@ void loop() {
   switchScreenLast = switchButtonValue;
   increaseButtonLast = increaseValue;
   decreaseButtonLast = decreaseValue;
-  printOutput();
+  if (isScreenChanged)
+    printOutput();
 //  Serial.println(analogRead(A1));
-  analogWrite(6, 1);
-
-  delay(20);
+  analogWrite(6, value);
+  value +=5;
+  delay(50);
 }
 
 void switchMode () {
@@ -153,7 +160,8 @@ void printOutput () {
       lcd.print("Enc.: ");
       lcd.print(encryption? "yes" : "no");
    }
-
+   
+   isScreenChanged = false;
    
 //   for (int i = 0; i < 5; i ++) lcd.print(address[i] - '0');
    //lcd.print(mode);