Questions tagged [arduino-leonardo]

An Arduino board based on the ATmega32u4 chip with built in USB HID functionality

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24 views

Problem burning bootloader to ATMega32U4-MU (is the schematic correct?)

I designed a very simple 4*3 keypad system controlled by an ATMega32U4-MU MCU, using Adafruit's Itsy-bitsy 32U4 as reference (attached is the schematic of my circuit, while Adafruit's circuit can be ...
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68 views

How do I recover a beetle where I loaded a program that was too large and overwrote the bootloader?

I'm doing on-target unit testing for an industrialized application and my test code is too large to fit everything on the board at the same time. I'm using the Sloeber toolset to develop, and I put ...
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26 views

Copy outbound data of Serial to Serial1 for Pro Micro

I am working on a bluetooth HID device. There are libraries which make HID devices a cake walk if you are making a wired version of your HID device. I managed to configure my bluetooth module to ...
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1answer
26 views

Wiring Multiple MPU 6050 to Micro/Lenardo

disclaimer I am new at hardware/circuits I am currently trying to connect two MPU-6050 to a single Micro board. In addition, there are 5 additional buttons to be connected. I am under the impression ...
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1answer
29 views

Input Capture with Sleep Enabled on ATM32u4 board only works every second reading in SLEEP mode

In short: I have an Input Capture code and a Power-Saving code combined into one program. Both are adapted from Nick Gammon's examples that work fine independently. When I combined them into one ...
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1answer
63 views

Arduino Keyboard starts lower case (but it shouldn't)

So I flashed the KeyboardMessage example to my Arduino SS Micro ATmega32U4. When I open an editor and push the button, I would assume the output to be Zou pressed the button XX times. (The "Z&...
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1answer
30 views

Leonardo keypresses not working with OBS

I am using an Arduino Leonardo to have hotkeys for OBS but they don't work when the OBS Studio window is not focused. I have the Leonardo press Ctrl + Alt + Shift + F7 when I press a button connected ...
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2answers
118 views

Button box wiring sanity check

I am building a flight sim button box and I would like someone to please check my proposed wiring diagram. I will be using 12 buttons, 4 rotary encoders, each also with a push button and 4 (on)-off-(...
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2answers
44 views

Keypad as game input device?

I have been trying to get a button matrix to work but im not experienced enough in programming. I Have tried to read up but i don't know how to execute so some help would be greatly appreciated. I ...
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0answers
36 views

Gamepad connection using Pro Micro(ATMEGA32u4 + HC-05

I have been working on making a HID compatible Gamepad using Pro Micro and HC-05 module. I have successfully configured the class of HC-05 module to appear as an Input device(A gamepad) on my PC ...
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1answer
38 views

ISR Issue: Arduino Pro Micro

I'm trying to do a small test where I am using the ISR on the Arduino Pro Micro it up from sleep mode. I'm using a Force Sense Resistor (FSR, a resistor that changes it's resistance depending on how ...
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35 views

Is extra hardware and components needed to connect the bare MCU directly to a PCB, without a shield?

As a hobbyist I code in a variety of arduino's and in Digispark's (Attiny 85 and 167). But I'm doing a project with space contraints, so I'd need to use just the MCU directly over my pcb. Apart from a ...
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Leonardo Board stops reading analog input

I'm currently writing software that reads in analog data, writes it into an instance variable array, then returns the address of the array. However, after a few iterations of loop, the program stops ...
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1answer
58 views

String(int) function stopping the Arduino

Well I am trying make an application with arduino leonardo and GSM Shield. There are conditions if, else if, else .. etc if (smsMetni.indexOf("DURUM") != -1) { Serial.println("SMS ...
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20 views

Can the Arduino Leonardo Read 3.3v digital input? [duplicate]

I'm having difficulty finding information about the ATmega32U4 logic levels for the digital input ports. I was wondering if I can hook up the 3.3v output of https://www.amazon.com/dp/B07KBWVJMP/ (HC-...
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1answer
108 views

Arduino Joystick Library not Recognized by Games (Steam)

I have an Arduino Pro Micro running code that uses the Arduino joystick library to act as a gamepad. I'm just doing testing right now so there's a single button wired up and configured in the code. ...
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38 views

leonardo mouse readings

hi there im using arduino uno + usb host shield and i have taken the readings from the usb mouse in this line of code : x = mi->dX; and the x output is the speed of the mouse x coordinates and i ...
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35 views

How do i efficiently write this code for PS2 controller to USB convertion sketch for Arduino Pro Micro?

I am really new to coding and building stuff, so forgive me if it is anything offensive.i have been trying to convert my PS2 dualshock controller to USB using arduino. there is a library called ps2x ...
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28 views

WIFI Bee ESP8266, MySQL and PHP

I am trying to update a db table using a WIFI Bee. For the life of me, I can't figure out how to connect to and program the WiFi Bee ESP card. I've looked on DFRobot's website and other websites to ...
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99 views

avr-g++: error: missing device or architecture after '-mmcu='

Im on Linux Manjaro right now and Im following this tutorial (https://youtu.be/qAM2S27FWAI) on how to use Arduino from the command line. Im currently trying to create a Makefile for my Arduino ...
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1answer
74 views

Blank project gives errors while uploading Arduino Leonardo on Linux Manjaro

I'm on Linux Manjaro. I plugged my Arduino Leonardo clone (that I know works correctly). And tried to flash a blank project on it: (My IDE version is 1.8.12) void setup() { // put your setup code ...
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1answer
43 views

Why can the Xbox360 not detect the Arduino Leonardo as keyboard?

Arduino Leonardo as keyboard in the computer works! But not with the Xbox360. The Teensy works perfectly on the PC but how to emulate a keyboard device for the Xbox360. I know the Xbox360 has ...
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1answer
55 views

How can I understand which arduino I need to run some code?

I want to build this project (but any other project would give me the same uncertainty): https://github.com/ltpitt/arduino-n64-controller-library But I cannot understand which arduino I can buy that ...
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1answer
125 views

Does the MKR WIFI 1010 support the arduino mouse and keyboard controller?

I am working on a project right now that needs to connect to my computer via bluetooth and access the arduino mouse and keyboard library. In my research, I've found that only the Leonardo, Due, and ...
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1answer
35 views

TLE9879 BLDC shield won't communicate

I just got the TLE9879 BLDC shield, which I connected to an Arduino Leonardo. Compiling the example sketch (bldc_shield_blinky_test) went fine, however, upon flashing it to the board the LED on the ...
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2answers
69 views

Can a video game potentially detect arduino leonardo?

If I automated an action in a video game through arduino leonardo, can it be detected? Things like autohotkey can be easily detected, however i would expect an arduino would be far more difficult. How ...
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1answer
51 views

Mouse.move values

I understand that Mouse.move move the mouse from its current position, example: Mouse.move(100, 100); Will move the mouse to 100 pixels right and 100 pixels down. But in reality it will move to ...
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1answer
85 views

How to debug MIDI input?

I'm trying to receive MIDI messages on a Leonardo. To do that I used the circuit in the diagram below (only the top half for receiving). The only thing I did differently was using an 1N4148 diode ...
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1answer
105 views

Can't get keypad to use Keyboard.write on an Arduino Uno

I've tried to use Keypad.h and Keyboard.h libraries to get my Arduino to use my Keypad for Keyboard input. I'll start with working keypad code (which is pretty easy but it's my first post so I want ...
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1answer
41 views

Does Keyboard.begin() and Keyboard.end() make my code slower?

I'm making an IR Macro keyboard, and about 10% of the code is dedicated to the Keyboard commands, would having Keyboard.begin() and Keyboard.end() in the method responsible for typing make any ...
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37 views

Connecting Arduino Uno to Arduino Leonardo

I have an RFID shield connected to my Arduino Uno, but I want it to be able to send keystrokes to the computer when I scan the correct card. I have the Uno set up correctly so that when the card is ...
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34 views

How can I query device information on a Leonardo acting as a USB Host?

I have a Leonardo stacked with a USB Host Shield. Is there any way I can query information about any USB devices attached to it? I'm looking for any information I can get about the device, although ...
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37 views

help with an outlaw pinewood derby car

So I am trying to create a code for an outlaw pinewood derby car. It is using a brushless esc with reverse for a ducted fan. The car has a push button on the front along with headlight and brake light ...
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2answers
109 views

What happens to serial output when no-one is listening?

This question probably needs a better title but I'm having trouble thinking of one! Please feel free to edit or suggest one. My target system is a pair of Arduino Leonardos linked by XBee radios. One ...
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1answer
142 views

USB Power switch

Can an Arduino power a USB device like a tablet from one of it's pins or do I need a relay? I want to essentially have the Arduino turn on and off a USB charger. Thanks
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42 views

How to quit flash mode on HM-10?

I have an HM-10 BLE module connected to Arduino Leonardo. It forwards UART from my computer: #define btSerial Serial1 void setup() { Serial.begin(9600); while (!Serial) { delay(50); ...
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1answer
63 views

Unreliable communication with low baudrate on Leonardo

I am using an Arduino Leonardo (more precisely this product), to communicate with servo-motors) using RS485. Everything works fine as long as I don't go below a baud rate or 115200bps. If I go below, ...
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2answers
351 views

Multiple Time-Sensitive Tasks

I'm using an Arduino Leonardo and need to perform two time-sensitive tasks like this: // Task 1 - Gets executed once a second (1Hz) // Execution of task needs approx 70ms task1(); //Sending a ...
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1answer
173 views

Connect Arduino to LiDAR via RS-232

Edit: We're so close! Update at bottom! I'm not sure if this is the right place to ask, but since you helped my so much in the past, I thought it's worth a try. So as I stated in my last question, I'...
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1answer
26 views

How do i Connect multiple sensors in one arduino. Which are namely a accelerometer, GPS, microphone and a GSM module [duplicate]

I am a noob in the Arduino world and have only started reading about it. I have zero experience with Arduino some suggestions to increase my level will also be highly appreciated. But I have a lot of ...
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80 views

ATMEGA32u4 Arduino Bootloader Issues

I've been struggling with this issue for a few days on and off now.  I made a custom PCB (schematic) for a smaller Arduino Pro Micro and it works - mostly.  The only issue I had was that the pins on ...
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1answer
45 views

How to connect accelerometer, GPS, microphone and a GSM module to a Arduino? [closed]

I am a noob in the Arduino world and have only started reading about it. I have zero experience with Arduino some suggestions to increase my level will also be highly appreciated. But I have a lot of ...
0
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0answers
41 views

Leonardo doesn't have enough memory to run a TFT and handle MIDI messages

So, I got a Leonardo because I plan to build a device to draw MIDI CC curves on a touchscreen TFT to be sent over MIDI to a DAW. I'm in the initial testing stage, and got a basic Paint application to ...
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37 views

default in switch doesn't appear to execute

I have a situation where the default case in my switch statement doesn't appear to execute as expected. I wonder if there is some subtlety I'm missing here? Given the following enum: enum ...
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1answer
119 views

ATMega32u4 SLEEP instruction

I was reading the ATMega34u2 datasheet and trying to figure out Sleep Mode. I know most people recommend using avr/sleep.h library. But I wanted to try out using the registers. I am fairly new to all ...
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1answer
55 views

How can I clear the memory of my Arduino in this case?

I have made a code using involving HID control. But it seems that I messed up, but I can't upload a new sketch(nor edit the wrong code), because my Arduino is constantly doing things like Ctrl+Alt+...
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84 views

RadioHead Library and SPI Device (MAX7219) not working together

I am trying to use the RadioHead Library (receiving a 433Mhz Signal) and an LED Matrix (Max7219 via SPI) on the same Arduino Leonardo. Now either one works fine when only it is connecting. But when ...
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49 views

i failed to upload code to my arduino leonardo

processing.app.debug.RunnerException at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:160) at cc.arduino.UploaderUtils.upload(UploaderUtils.java:82) ...
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1answer
91 views

HC-05 can not use lower pins only 8 and higher

#include <Arduino.h> #include <SoftwareSerial.h> char Incoming_value = 0; // SoftwareSerial BTSerial( 10, 11 ); // RX | TX + // SoftwareSerial BTSerial( 9, 10 ); // RX | TX + // ...
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1answer
265 views

It is possible to revive my Arduino Leonardo (mini beetle) board?

I have this board: It has the atmega32u4 chip. I have updated its code several times, and used it without issues for several months. Today, while updating (using Arduino IDE) it started to throw ...

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