#include "LiquidCrystal.h"
const int rs = 7, en = 6, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7)
void setup() {
Serial.begin(9600);
lcd.begin(16, 2);
pinMode(22, INPUT_PULLUP); // Reed switch - Row1
pinMode(24, INPUT_PULLUP); // Reed switch - Row2
pinMode(26, INPUT_PULLUP); // Reed switch - Row3
pinMode(28, INPUT_PULLUP); // Reed switch - Row4
pinMode(32, OUTPUT);
digitalWrite(32, HIGH);
lcd.setCursor(0, 0);
lcd.print("hello");
}
When I run the above code I get weird characters in my LCD. I removed all the connections to the pins` defined in pinMode and left only the lcd connections but kept the pinMode and digitalWrite statements in the code, but am still getting weird characters. But when I remove the pinMode and digitalWrite statements from my code the lcd works fine. Can anyone help me out.
Edit:
Another weird thing happened, I removed all the pinMode and digitalWrite statements do my setup() had only Serial.begin() and lcd.begin() and I only had the lcd connections. Now I put this code to print into an function called lcdprintMove() and there were other functions too which were performing other tasks when I ran it as such I got weird characters in the LCD but when I removed all of the other functions,the lcd printed fine. From this I was able to conclude that this problem can't be because of the supply but has to be something else. But I still can't figure it out.
Problem Solved
Today I commented all the digitalWrite statements and uploaded the program and it worked! So, I am going to connect the lcd onto a separate arduino and communicate serially. Someone suggested the solution of putting a cap to ground and buff the power of 5 v pin can you explain this in more detail.
Circuit diagram Note: Rs is connected to pin 7 and E to 6
