I need help with the code, I've asked chatgpt, it still doesn't work. So I'm making a temp based watering system using max6675 and rotary encoder This is the code I'm using rn for encoder and LCD #include #include #include LiquidCrystal_I2C lcd(0x27, 20, 4); // Set the I2C address to 0x27 and specify the columns and rows #define PINA A0 #define PINB A1 #define PUSHB A2 Rotary r = Rotary(PINA, PINB, PUSHB); int cursorLine = 1; int displayFirstLine = 1; #define MainMenu 0 const int maxItemSize = 11; char startMenu[][maxItemSize] = {"Volume", "Reset"}; int Summary[] = {0, 0}; int menuItems; char *menuSelected = NULL; bool volumeHandler = false; int volume = 0; int menuOption = 0; int backlightPin = 10; int brightness = 255; int fadeAmount = 5; unsigned long startMillis; unsigned long currentMillis; const unsigned long period = 10000; void setup() { pinMode(PINA, INPUT); pinMode(PINB, INPUT); pinMode(PUSHB, INPUT); digitalWrite(PINA, HIGH); digitalWrite(PINB, HIGH); digitalWrite(PUSHB, HIGH); pinMode(backlightPin, OUTPUT); digitalWrite(backlightPin, HIGH); Wire.begin(); lcd.begin(20, 4); welcome(); lcd.clear(); menuItems = sizeof(startMenu) / sizeof(startMenu[0]); menuSelected = &startMenu[0][0]; menuOption = MainMenu; startMillis = millis(); display_menu(); } void loop() { volatile unsigned char result = r.process(); currentMillis = millis(); lcd.setCursor(18, 0); lcd.print((currentMillis - startMillis) / 1000); if (currentMillis - startMillis >= period) { LCDfadeOut(); } if (result) { init_backlight(); if (result == DIR_CCW) { if (volumeHandler == true) { volume--; lcd.setCursor(0, 1); lcd.print("Volume: "); lcd.print(volume); } } else { if (volumeHandler == true) { volume++; lcd.setCursor(0, 1); lcd.print("Volume: "); lcd.print(volume); } } } if (r.buttonPressedReleased(25)) { init_backlight(); if (menuOption == MainMenu) { if (cursorLine == 1) { volumeHandler = !volumeHandler; lcd.clear(); if (volumeHandler) { lcd.setCursor(0, 1); lcd.print("Volume: "); lcd.print(volume); } else { display_menu(); } } else if (cursorLine == 2) { Reset(); display_menu(); // added to display the menu after Reset } } } } void welcome() { lcd.clear(); lcd.setCursor(0, 0); lcd.print(" Demo Menu "); lcd.setCursor(0, 2); lcd.print(" Carlos Siles "); lcd.setCursor(0, 3); lcd.print(" Version 1.0 "); delay(2000); } void display_menu() { lcd.clear(); lcd.setCursor(0, 0); lcd.print(" Menu "); for (int i = 0; i 0) { lcd.setBacklight(brightness); brightness -= fadeAmount; delay(20); } lcd.noBacklight(); lcd.clear(); } void init_backlight() { lcd.setBacklight(255); startMillis = millis(); brightness = 255; } My plan is that there would be temp showing at the top after the menu then options named Threshold, duration, and interval, so I tried a sketch by someone named Carlos siles and only retained the volume option. Also other options like reset and summary are options I want to add. If you can, could you also add the rest of the code like the temp and relay mod and small water pump. Another prob I want to say is that the encoder increases the value by random like 1-2 or even more. This is due tomorrow and I would be sad if I don't finish, this actually for research subject

[IMG20240221190041] Is this good enough?

ok so kept unplugging and plugging it back in and it finally worked. But I wanted to ask if you could help me with my project

so the LCD does turn on correctly - that's already a good sign can you make sure the power reaches your rotary encoder? try to move the rotary power pins next to the others [image]

Could you maybe help with setting up a menu in the lcd?

#include #include #include LiquidCrystal_I2C lcd(0x27, 20, 4); // Set the I2C address to 0x27 and specify the columns and rows #define PINA 3 #define PINB 2 #define PUSHB 4 Rotary r = Rotary(PINA, PINB, PUSHB); int cursorLine = 1; int displayFirstLine = 1; #define MainMenu 0 const int maxItemSize = 11; char startMenu[][maxItemSize] = {"Volume", "Reset"}; int Summary[] = {0, 0}; int menuItems; char *menuSelected = NULL; bool volumeHandler = false; int volume = 0; int menuOption = 0; int backlightPin = 10; int brightness = 255; int fadeAmount = 5; unsigned long startMillis; unsigned long currentMillis; const unsigned long period = 10000; void setup() { pinMode(PINA, INPUT); pinMode(PINB, INPUT); pinMode(PUSHB, INPUT); digitalWrite(PINA, HIGH); digitalWrite(PINB, HIGH); digitalWrite(PUSHB, HIGH); pinMode(backlightPin, OUTPUT); digitalWrite(backlightPin, HIGH); Wire.begin(); lcd.begin(20, 4); welcome(); lcd.clear(); menuItems = sizeof(startMenu) / sizeof(startMenu[0]); menuSelected = &startMenu[0][0]; menuOption = MainMenu; startMillis = millis(); display_menu(); } void loop() { volatile unsigned char result = r.process(); currentMillis = millis(); lcd.setCursor(18, 0); lcd.print((currentMillis - startMillis) / 1000); if (currentMillis - startMillis >= period) { LCDfadeOut(); } if (result) { init_backlight(); if (result == DIR_CCW) { if (volumeHandler == true) { volume--; lcd.setCursor(0, 1); lcd.print("Volume: "); lcd.print(volume); } else // Update cursorLine for menu navigation { cursorLine--; if (cursorLine menuItems) { cursorLine = 1; } display_menu(); } } } if (r.buttonPressedReleased(25)) { init_backlight(); if (menuOption == MainMenu) { if (cursorLine == 1) { volumeHandler = !volumeHandler; lcd.clear(); if (volumeHandler) { lcd.setCursor(0, 1); lcd.print("Volume: "); lcd.print(volume); } else { display_menu(); } } else if (cursorLine == 2) { Reset(); display_menu(); // added to display the menu after Reset } } } } void welcome() { lcd.clear(); lcd.setCursor(0, 0); lcd.print(" Demo Menu "); lcd.setCursor(0, 2); lcd.print(" Carlos Siles "); lcd.setCursor(0, 3); lcd.print(" Version 1.0 "); delay(2000); } void display_menu() { lcd.clear(); lcd.setCursor(0, 0); lcd.print(" Menu "); for (int i = 0; i 0) { lcd.setBacklight(brightness); brightness -= fadeAmount; delay(20); } lcd.noBacklight(); lcd.clear(); } void init_backlight() { lcd.setBacklight(255); startMillis = millis(); brightness = 255; } I tried this and it worked, now I'm thinking on how to add 2 more options that function like Volume, but don't know how to do it

ok, um what is a good max6675 library? and is this code needed or can it be replaced? thermocouple.begin(); because the library made by adafruit doesn't have it

20x4 LCD i2c menu with rotary encoder

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J-M-L February 21, 2024, 5:20pm 16

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20x4 LCD i2c menu with rotary encoder

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