Questions tagged [library]
A library is a file that can be included into the code to add new instructions by combining many existing instructions and creating one easy to use instruction to call.
532 questions
0 votes
1 answer
64 views
Compiling issues with included library MX1508 for Billy Bass build
Thank you for considering my question. I have been learning Arduino so I can teach coding basics to my son. I came across a fun project to interface bluetooth with an old singing Billy Bass so he can ...
0 votes
2 answers
137 views
LED Matrix for Arduino R4 Wi-Fi specific functions
I'm searching for the path and the source code for the builtin (I think) function, name is: renderBitmap(). This function appears as a member of the ArduinoLEDMatrix class but its name doesn't appear ...
- 25
1 vote
0 answers
79 views
FS1000A transmitter and MX-RM-5V receiver not working
I'm new to Arduino development. I use Arduino Nano v3 ATmega328P (Old Bootloader). I assembled 2 small boards, one of which is a transmitter with three buttons, and the second is a receiver with three ...
- 21
0 votes
2 answers
156 views
How to calculate the size of Arduino routines?
I want to design an Arduino Uno/Nano library (an alternative to floats that uses less RAM) that uses a minimum of code space after compilation. Is there a (not too complicated) way to calculate or ...
- 21
0 votes
1 answer
330 views
Arduino IDE Doesn't Detect Installed Library Dependency
I am trying to edit an old code for a dot matrix display. This code was written on Arduino IDE in Windows 10, for DOIT ESP32 DEVKIT V1. I never had a problem with libraries in the Windows environment ...
- 99
3 votes
0 answers
108 views
Why RTU bridge timeout even though answer is received?
I'm testing the following code as a bridge between https://sourceforge.net/projects/qmodmaster/ and https://pypi.org/project/pyModSlave/. As hardware, I'm using a NodeMCU 1.0 and a USB/TTL converter. ...
- 31
0 votes
1 answer
106 views
Keypad library isn't working or I am wrong somewhere [closed]
I am using PICSimLab to simulate a keypad. The configuration of the keypad is as shown in the picture: and the code is: #include <LiquidCrystal.h> #include <Key.h> #include <Keypad.h&...
0 votes
1 answer
471 views
Problem installing RPLidar library
I'm trying to add the RPLidar library. I've already checked this solution, but it's not working for me, I get this error : Error: 13 INTERNAL: Library install failed: extracting archive: Not a ...
- 9
1 vote
1 answer
98 views
Why 0 devices, but not 1?
I have found a sketch in Wokwi where a MAX7219 LED matrix is used. The sketch subject is to display 0 using <LedControl.h>. I don't understand why it's nessesary to send 0 unlike 1 in fourth ...
- 23
3 votes
1 answer
1k views
How to change the direction of a stepper motor using the AccelStepper library?
I'm using a Nema 17 stepper motor (200 steps) and a DRV8825 motor driver. This is the configuration I am using: I am using a 9 V power supply. The dirPin is connected to pin 3 on the Arduino board, ...
3 votes
2 answers
2k views
is #ifdef __SD_H__ considered a bad practice?
Say I'm working on a library^1 to which I want to add support for SD.h^2 but knowing for a fact that many microcotrollers don't support SD.h (therefore they result in compilation errors [eg. Attiny85])...
- 145
1 vote
0 answers
153 views
MKR GPS shield inconsistent GPS connection/data printing...library issue?
I have been using a MKR WiFi 1010 board with GPS shield for a very long time (year+) and have not been able to solve my problems with the GPS data dropping out. The setup for my field application is a ...
- 11
2 votes
1 answer
4k views
Impossible to install the esp_camera library
I cannot install the esp_camera library. When I try to add the .zip, I get "does not contain a valid library. Everything about this ESP-32 Cam seems to rely on that library, and I can't find a ...
- 21
1 vote
1 answer
259 views
Get 3-inch e-Paper working on a Nano
Please help! I purchased a 3-inch e-Paper Display from Waveshare, which appeared to suit my project well. The exemplary little code to show an image was easy to set up and to demonstrate functionality:...
- 29
1 vote
0 answers
973 views
Keyestudio KS5009 ESP32WROOM32 Smart Home
I'm encountering persistent errors with the sample code provided for my smart home kit project. Despite conducting extensive research and troubleshooting efforts, I haven't been able to find a ...
- 39