Questions tagged [arduino-leonardo]

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

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1answer
20 views

Leonardo with hm-10 doesn't work

I have a hm-10 module attached to Arduino Leonardo board, I'm using a bluetooth terminal app to send some text. The problem is I can send data from the Serial monitor to my phone but when I send from ...
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0answers
62 views

Stand alone Atmega328p-au

I'm trying to make a standalone arduino board with an OLED display using an Atmega328p. I never tried to make such a board using SMD components. I've soldered everything together except the OLED ...
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1answer
71 views

Question regarding using Arduino and MIDI

I'm using an Arduino Leonardo for sending MIDI In and Out messages to Ableton Live. Components include a Potentiometer, a Capacitive Touch Sensor, and a DC Motor, which I'm powering with a L298N Motor ...
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50 views

ATMega32u4 - Sending and receiving data through TX and RX

Hi everyone, first time here on the forum, so, apologies if I'm doing anything incorrectly. Long story short, I built a device that takes voltages in and transform them into midi data. I used an ...
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1answer
44 views

Arduino Leonardo doesn't print anything to Serial Monitor with my specific code

I did a project with an Arduino Leonardo and a fingerprint sensor (DY50). When I uploaded the enroll example from the Adafruit Fingerprint Library and saved my fingerprint, everything worked. But when ...
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43 views

Is there any way to do real time voice communication via bluetooth on arduino?

Is there any way to send and play voice between two arduino projects which has connected via blutooth modules. 1st device ( sender ) : has microphone and bluetooth module to send voice. 2nd device ( ...
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2answers
112 views

Arduino Pico doesn't work with ST7735 screen

I am attempting to get the graphicstest example bundled with the Adafruit ST7735 library for the 0.96 inch LCD screen. The example runs fine and serial communication is up and running. However, ...
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0answers
101 views

I'm making a trim wheel using a rotary encoder for flight simulation. Should I have the Joystick library use button presses or make it an axis?

Title says the majority of it. I'm looking to make a trim wheel for flight sim using a rotary encoder, the Joystick library and an Arduino Leonardo. I wasn't sure if it would be better to make it a ...
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1answer
74 views

Using Leonardo as keyboard: add wake and sleep functions

I want to use a Leonardo with USB chip to emit some commands via USB port to a digital piano computer (running Windows 7) for various functions. I've gotten the Leonardo to emit page up and page down ...
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1answer
85 views

Arduino Leonardo - Setting up bluetooth - AT command from terminal does not return anything

I am trying to setup bluetooth with a board that contains Arduino Leonardo chip. My full setup is: The main board: https://www.dfrobot.com/product-1148.html The base shield: https://coolcomponents.co....
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2answers
231 views

Arduino sketch uses too much memory storage space?

I've never used arduino before but am using one for a school project. I am using an arduino leonardo and I've uploaded the sample code below #include "Adafruit_CCS811.h" Adafruit_CCS811 ccs; ...
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92 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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2answers
125 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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0answers
40 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
127 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
79 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
88 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
50 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
1k 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
137 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
116 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
151 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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1answer
43 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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1answer
63 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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1answer
583 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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0answers
97 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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0answers
135 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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0answers
44 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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1answer
124 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
86 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
344 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
75 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
110 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
264 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
299 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
432 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
52 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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0answers
111 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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0answers
45 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
219 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
342 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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0answers
102 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
105 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
398 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
208 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
41 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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0answers
245 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
62 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 ...
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0answers
42 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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