Problem: Cannot get Hello World example to work with Arduino mkr wifi 1010 with 16x2 LCD.
I connected 1010 and LCD per description in Hello World code. Also looked at diagram examples I found online using POT and 220 ohm resister. Made sure “TOOLS” tab had wifi mkr 1010 and port being used. The code compiled and uploaded with no errors. I just get squares. I used the wifi 1010 for other projects and it worked fine. I even tried another 16x2 LCD with same results.
I than moved the same jumpers and connected the Mega2560 (same pins as 1010) to the same LCD. Changed the “TOOLS” tab to MEGA2650. Code complied and upload. HELLO WORLD worked.
Need help to see why HELLO WORLD works with MEGA 2560 and not MKR WIFI 1010 using the same configuration.
There are multiple LCD libraries, each with their own Hello World example, and multiple types of 16x2 LCDs. We need to know which of each you're using.
As well as the code posted according to the instructions, the wiring diagram and preferably, a photograph of your assembly taken outdoors in full daylight (but not sun) so that the details can actually be seen.
Attached is the code used: I believe this is in the example tab.
#include <LiquidCrystal.h>
/*
LiquidCrystal Library - Hello World
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch prints "Hello World!" to the LCD
and shows the time.
The circuit:
LCD RS pin to digital pin 12
LCD Enable pin to digital pin 11
LCD D4 pin to digital pin 5
LCD D5 pin to digital pin 4
LCD D6 pin to digital pin 3
LCD D7 pin to digital pin 2
LCD R/W pin to ground
10K resistor:
ends to +5V and ground
wiper to LCD VO pin (pin 3)
Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe
This example code is in the public domain.
*/
// include the library code: #include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
}
Read the how to use this forum-please read sticky to see how to properly post code. Remove useless white space and format the code with the IDE autoformat tool (crtl-t or Tools, Auto Format) before posting code.
