Unanswered Questions
143 questions with no upvoted or accepted answers
3
votes
0
answers
191
views
Grove LCD display not working with arduino rev 2 wifi (Unknown error at address 0x3E)
I am trying to connect Grove 16x2 LCD (White on Blue) to my Arduino uno rev 2 wifi.
So far, I've tried hd44780 library's ioClass examples, but nothing worked. I've then decided to scan ports and when ...
- 31
3
votes
0
answers
700
views
Serial does not work when LiquidCrystal library is used
I have been struggling with a LCD for 6 hours straight - I've had many problems including random characters showing up, and this time (not quite sure what changed, I tried so many things) as soon as I ...
- 2,522
3
votes
0
answers
397
views
How do I install a library in Arduino Yun cross compile environment?
A few days ago, I've asked this question.
Thanks to the replies I've received, I've set up a cross compile environment for Yun by following this guide.
I've created a virtual machine with virtualbox ...
CommunityBot
- 1
3
votes
1
answer
1k
views
3.5 inch TFT LCD connection diagram with mega r3
Forum post
I would like to ask if someone has this shield fully working?
My biggest problem is the touch screen that I couldn't manage to make work.
Here is the code I am using:
// ic: ili9327
#...
CommunityBot
- 1
2
votes
0
answers
85
views
Arduino code intermittent
Have an alarm for "tea time", "lunch time" and "tea time". Works well at times but occasionally it gets stuck on the alarm not resetting, other times it does not trigger ...
- 544
2
votes
0
answers
99
views
How to show repeated result on LCD while button is pressing
my results are here.
0 press--"a"
1st press--"b"
2nd press--"c"
3rd press-- still showing "c"
When button pressed 3rd time, It must be repeated to show "a&...
- 5,514
2
votes
0
answers
161
views
TFT Screen with Arduino UNO does not display as expected
I have a 3.5" TFT LCD communicating in parallel connected to Arduino UNO.
I expect it draws a white circle on a black background but all it does is to show a white screen.
How to fix this?
main.c
...
- 173
2
votes
0
answers
259
views
CAN bus communication and LCD updation
I am trying to communicate arduino uno with CAN bus using MCP2515 shield.
Data sending and receiving both things are done.
Whatever data received is displayed on LCD.
CAN bus receive is done using ...
- 5,514
2
votes
0
answers
159
views
Why doesn't LCD 16x2 work with fingerprint sensor code?
When I separate fingerprint code and LCD code it works fine. sensor read 6 templates which I already stored 6 fingers ID. When I combine the code it read 0 templates.
#include <Adafruit_Fingerprint....
2
votes
0
answers
156
views
Arduino EPROM dumper with utility program in C
I am writing EPROM dumper with Arduino UNO and utility program in C and I am using Ubuntu 20.04. The Arduino sketch works fine, but I am having few problems with the utility program. The first problem ...
- 21
2
votes
0
answers
233
views
qMenuSystem using DigoleSerial library doesn’t work on my I2C Monochrome OLED
Just like the title says I’m trying to make qMenuSystem to work with my oled display.
Here is what I know so far about my display :
- It's a Monochrome OLED 128x64 (Blue) Display
- It's connecting ...
- 23
2
votes
0
answers
290
views
local libraries and include dependencies
I'm using PlatformIO in Atom for Arduino programming. I get dependencies error when build. This is my reproduction sample code:
/lib/mylib/mylib.h
#ifndef MYLIB_H
#define MYLIB_H
#include <...
- 43
2
votes
0
answers
43
views
Low Level programming - MKR Fox1200
I'm working on a project using this board and wish to do so on a low level ,as in enabling certain registers to enable interrupts etc.
I can't seem to find the correct header files to support ...
- 21
2
votes
0
answers
99
views
Why is my keypad requiring a double-click only on the first row to register?
I have a keypad that is connected to my Arduino and each time a key is pressed, the number should be outputted to an LCD screen. The issue is that after the screen is cleared, and a new ID is being ...
- 2,522
2
votes
0
answers
919
views
How to read the busy flag on LCD?
I have a standard 16x2 LCD screen and I have it hooked up to my Arduino UNO via a I2C backpack (4-bit mode).
Since I want to learn about the lcd at a lower level I’ve decided not to use the LCD ...
- 121