Questions tagged [arduino-leonardo]
An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
274
questions
0
votes
0answers
18 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 ...
1
vote
0answers
30 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 ...
0
votes
1answer
17 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 ...
0
votes
1answer
33 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+...
0
votes
0answers
11 views
Is it possible to use a IR proximity sensor as a dust optical sensor? [migrated]
I'm doing an automatized-ish windshield wiper project, which requires some kind of dust sensor. I have an IR proximity sensor and I could only find people using it for rain detection on windshields.
...
0
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0answers
32 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 ...
0
votes
0answers
29 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)
...
0
votes
1answer
68 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 +
// ...
0
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0answers
41 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 ...
1
vote
0answers
917 views
Cannot upload to Leonardo after update to macOS Catalina
I'm not sure this is the right site, but I've spent several hours trying to figure out why I suddenly cannot upload to my Leonardo (actually, a "Pro Micro" with a 32u4) after upgrading to macOS ...
0
votes
1answer
30 views
Flash size in boards.txt ATmega 328p 32u4
The ATmega328p and ATmega32u4 microcontroller have 32Kb of flash memory (as datasheet). Bootloader for each microcontroleer has different size (about 512 byte for 328p and 4kb for 32u4).
Why in ...
1
vote
2answers
136 views
Arduino I2C Wire.onReceive hangs after a few loops
I have an Arduino Leonardo (master) and a Polulu A-star 328 PB(slave). I intend to use the slave to actuate some servos. I've modified the code from https://www.arduino.cc/en/Tutorial/MasterWriter to ...
0
votes
0answers
80 views
Problem sending IR signal on Arduino Leonardo/Uno (IRRemote library)
I am trying to use my Arduino Leonardo (or Uno!) as a remote with the IRRemote library. The current setup picks up and decodes a signal perfectly, but fails to retransmit it.
I have tested the ...
0
votes
2answers
240 views
Which kind of diodes I should use in buttons/keys matrix input? (Making gaming keyboard)
When making matrix input of NxM columns/rows with push buttons, there should be a diode next to each button to prevent "ghosting" and able read many keys pressed together correctly. There is a lot of ...
0
votes
1answer
50 views
Windows 10 does not recognize Arduino Leonardo
Using Arduino Leonardo, IDE 1.8.9, Windows 10.
For a short time, when I first got the Leonardo, Windows 10 would recognize the board; I could see it in devices, Windows 10 would make a sound when ...
0
votes
1answer
30 views
Changing ESP-12E NodeMCU to ESP-01S - how to trigger sketch?
I had my sketch up and running with a NodeMCU and a Leonardo Pro Micro and decided I wanted to minimize the footprint of the project and use the smaller ESP-01S board instead.
The ESP-01S is ...
0
votes
1answer
53 views
Leonardo soft bricked
I was uploading a sketch to my Arduino Leonardo and I pressed the reset button accidentally while it was still uploading. Now the board does not get recognized by my computer. Is there something that ...
2
votes
3answers
163 views
Using Servo on Timer3 on a Leonardo
I would like to use the Radiohead library and control a servo from the same Leonardo board.
Now the Radiohead library occupies timer1 and therefore cant be used together with the servo library. (It ...
0
votes
1answer
141 views
Arduino stopped working: avrdude: ser_open(): can't set com-state
I'm playing with my first Arduino device (Arduino Leonardo). It worked fine but at some point it failed. I'm getting this error:
avrdude: ser_open(): can't set com-state for "\.\COM6"
An ...
0
votes
0answers
147 views
How can I send AT commands to HM-10 module from my android phone?
Earlier today, I was able to connect flawlessly to my HM-10 module via the Arduino serial monitor. I think I then changed some settings without thinking and now I can no longer connect to it. No ...
0
votes
3answers
485 views
Distance Sensor. Calculating running median and Average
I'm trying to smooth out values for my IR distance sensor through running median filtering and a running average. I've tried to do the averaging, but my values don't seem correct and I am confused ...
2
votes
0answers
58 views
Why would using the += operator on an unsigned long crash my sketch? [closed]
I wrote a simple Timer class that's designed to work even in the face of the 49 day wrap of the millis() counter. I wanted a library that I could easily re-use and I could never remember the right way ...
-1
votes
1answer
27 views
Light Sensor - how to wait for specific setting then continue on Leonardo?
I have an analog light sensor working on my Micro Pro Leonardo board. I want to reach a part of my code which include keyboard presses where it monitors to see when an LED flashes and then continues ...
-2
votes
1answer
73 views
Using two leds with one push button [closed]
How can I make the code of this project where I will press one time a button, to turn on the first led (and turn off second led) and when other one press to turn on second led (and turn off the first ...
0
votes
0answers
26 views
Trying to install amforth on Leonardo board
Just got a Arduino Leonardo (with headers) dropped in my lap this week. I've tried experimenting with the Arduino C++ IDE and find it awkward. I have some previous experience with Forth and would like ...
0
votes
0answers
87 views
Leonardo - send key command after HID connection with computer established automatically?
Have confirmed that the BootKeyboard programming on the Leonardo is able to launch the macOS recovery partition or boot screen.
The problem I've got is that this only works if you send it after the ...
1
vote
1answer
83 views
How to trigger NodeMCU sketch from Arduino Leonardo Micro Pro?
So this is probably a very simple question. I have my NodeMCU set up and working where it connects to wifi and sends a push notification. Currently it does that automatically when connected to power.
...
0
votes
0answers
91 views
Arduino IDE 1.8.8 built in 1.2.1 Temboo Library?
I am weirded about the built-in "latest Temboo library" with the latest Arduino IDE; when a previous older code says to download the latest Temboo version < 2?
(which I found this: https://temboo....
2
votes
0answers
220 views
TRIAC Pulse driver for Spot Welder (help needed with programming)
I have designed and built a transformer driver board for my spot welder. It is powered from mains electricity (230 V) and consists of the following segments: triac drive and protection, zero cross ...
0
votes
2answers
1k views
Keyboard.h: No such file or directory - Arduino pro micro (leonardo)
I've just bought a new pro-micro and I want to simulate some keyboard inputs with it, the thing is the Arduino IDE (version 2:1.0.5) can't seem to find neither HID.h or Keyboard.h libraries. The steps ...
0
votes
0answers
77 views
Arduino Leonardo board - not running or appearing a USB on external power
I've got an Leonardo board, it seems to be official, in that it has the Arduino branding and Made In Italy on the bottom.
However I cannot get anything to run with external power supply. Everything ...
0
votes
0answers
39 views
Question about controlling servos with PWM while being able to accurately read the current from a sensor
Hi I am hoping to design a custom board ATMEGA32u4 with practically a Arduino leonardo bootloader. I plan to control up to 12 servos while being able to read back the current sensor voltage of an ...
1
vote
2answers
58 views
Leonardo - always on power, status remains between computer reboots?
I'm looking for two answer here.
Is it possible to power a Leonardo to be always on, separate from the power from the USB host - I've tried with a full size Leonardo and a power adapter but for some ...
0
votes
0answers
55 views
Have terminal bash script act as virtual “button” for Leonardo?
I've searched quite a lot for this and tried to piece bits of code together but with no luck so far.
All i'm looking to do is have a command I can run in terminal/bash script on the Mac trigger some ...
2
votes
1answer
265 views
Triggering a soft reset (Arduino Leonardo)
I want to trigger a soft reset on my Arduino Leonardo, and after some searching settled on using the watchdog timer, as it seemed to be the easiest and cleanest way to do it.
However, I don't think ...
1
vote
2answers
265 views
Generated frequency is not as expected
This code sets a pin HIGH for 1 microsecond and then LOW for 1 microsecond. The expected frequency should be about 500 kHz. When measuring the output the frequency is about 96.4khz. Why ?
int del = 1;...
0
votes
2answers
69 views
Is there a way to traverse a filesystem and read files with an arduino?
I recently got into arduino and I want to set up something big. My project will need the arduino to be able to get into a specific directory of a windows (later may change to linux but for now windows)...
2
votes
1answer
78 views
Help with AlphaNumeric array
I have a Leonardo board and I want to set up my pins to input in one shot using a for loop but the problem is with the analog pins I can't see how to set up a mixed alphanumeric array it gives me some ...
1
vote
1answer
371 views
Is there a board that can act as both a USB host and client for HID devices?
Trying to build an arduino-based Mouse/Keyboard enhancer. This will let me do things like press certain keyboard or mouse shortcuts on the input side, then do something custom on the output side. ...
0
votes
2answers
35 views
Leonardo Problem
I have boiled this down to a very simple piece of code:
int testKey;
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println("Input Source ID "); //Ask me the number
while (Serial....
0
votes
2answers
1k views
Sending a digital signal from one Arduino to another to trigger an event
I am wanting to send a digital signal from one Arduino to another. The goal is for one Arduino send a HIGH signal to a pin on the receiving Arduino. While the pin is HIGH, do function
I initially ...
0
votes
1answer
557 views
“exit status 1” error when invoking “useInterrupt” method [duplicate]
for context to this post you can catch up on this post
I am working with an Arduino Leonardo and Adafruit Music Maker shield.
I am trying to use the startPlayingFile method via the interrupt pin ...
2
votes
1answer
65 views
Specific values not showing when using a numeric keypad
I have attached a 3x4 keypad to my Arduino Leonardo as an input method. Whenever I press the buttons, the majority of the keys work but specific ones don't. Here's my code, I've set it up to beep a ...
0
votes
1answer
498 views
Custom atmega32u4 board crystal issue
So I built an custom board based on the Atmega32u4. Schematics attached.
I managed to burn a bootloader for Pro Micro using Arduino Uno as an ISP.
The issue I have is that the board is dead when ...
2
votes
1answer
181 views
How can I detect which baudrate a virtual COM port is set to?
I would like my software running on Leonardo to behave differently depending on the baudrate of the USB Serial set by the PC. For example, I want to make a smart USB to UART converter which performs ...
3
votes
2answers
93 views
Stacking 3 of the same shields on top of each other and instructing them in sync
Context:
I have an audio track separated into individual channels grouped by frequency and speaker location. I need to play all three of these channels simultaneously and perform instructions like ...
1
vote
1answer
116 views
Serial receiver (Arduino Micro ATmega32U4) in bad state
I have configured two Arduino Micros as a pair of multiplexer/demultiplexers communicating via Tx and Rx.
Everything works great except for one little thing. If I reset the sender (multiplexer) the ...
4
votes
4answers
164 views
Where in datasheet is the warning about unreliability of reading PINxn?
I use atmega32u4 (but believe it applies to all models). Here is the datasheet.
Consider the following C program (I use AVR-GCC 5.4.0):
#include <avr/io.h>
int main(void)
{
PORTB |= 1 <&...
1
vote
2answers
447 views
Do serial ports on Arduino UNO / Leonardo initialize differently?
What are the differences in serial communication between PC <---> Arduino UNO (ATMEGA328p) and PC <---> Arduino Leonardo (ATMEGA32u4)?
I am asking because of a problem related to using these ...
0
votes
2answers
1k views
USB Mouse Passthrough
I am currently doing research for a project of mine. My goal is simple: I want to pass input from a physical mouse, to a microcomputer to process the input and modify, and send the input in the form ...
