Questions tagged [arduino-leonardo]
An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
0
votes
0answers
20 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
90 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
52 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
25 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
33 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
16 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
46 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
37 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
54 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
104 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
148 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
49 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
30 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
44 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
30 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
103 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
235 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
50 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)...
1
vote
1answer
42 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
165 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
31 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
403 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
416 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
56 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
184 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 ...
3
votes
1answer
167 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
88 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
83 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 ...
3
votes
4answers
148 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 <&...
0
votes
2answers
232 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
585 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 ...
2
votes
3answers
132 views
DMX on the Arduino without additional driver chip
I recently saw this video where the creator controlled a DMX light via the Arduino. There he used the pins 3 and 4 for the data on the Arduino Duemilanove. As DMX library he used DmxSimple.
Based on ...
1
vote
0answers
67 views
Bitmap only displays correctly with PROGMEM keyword
I have a bitmap to draw defined as below.
PROGMEM const unsigned char ship1 [] = {0x18, 0x3C, 0x7E, 0xFF, 0x81, 0xC3};
It is then used by the arduboy library's draw slow bitmap function like so:
...
0
votes
0answers
49 views
Weird sketch size/memory/compiler (?) related issue (hanging, RX led on)
Also posted at: https://forum.arduino.cc/index.php?topic=549672.0
is there anyone who experienced similar problem or knows a solution to it?
The problem is that after uploading the code Arduino Pro ...
0
votes
1answer
209 views
USB upload to Pro Micro (32u4)
My project is based around the ATMEGA32u4 microcontroller.
I followed the Arduino Pro Micro schematic to design my own board layout and build a custom PCB, soldered on the components. Then I used ...
0
votes
0answers
138 views
Arduino pro micro might be bricked
I bought an Arduino pro micro (looks like this) from a Chinese seller over E-Bay, for its HID interface.
I installed the Arduino software on my Linux machine (Kali Linux), and started writing a USB ...
2
votes
1answer
337 views
Pro Micro recognised as Micro (win10, IDE 1.8.1)
I just got this pro-micro clone 5V and it's my first pro micro ever. After reading lots of discussions about how easy it is to brick and how it's just a smaller Leonardo, I've also found tutorials ...
1
vote
1answer
542 views
Timer0 overflow interrupt not working
I try to use the Timer0 of an Arduino Leonardo (ATmega32u) to trigger an interrupt at regular intervals, using plain avr-gcc (not the arduino library). I try to blink the built-in LED as test, but it ...
0
votes
1answer
292 views
Avrdude can't connect to butterfly programmer
I'm trying to upload my exported HEX file by avrdude using this command
/Users/user_acc/Downloads/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Users/user_acc/Downloads/Arduino.app/...
0
votes
2answers
219 views
RFID reader code to identify more than one tag
I'm new to using Arduino and I have managed a few changes to this sketch. But I want to check for a second tag if the first one is not correct. I just can't seem to get it to work. I think it would be ...
-2
votes
1answer
309 views
Can't read JSON data from client (webpage) with Arduino Leonardo ETH
I'm reading a digital pin and count how many times that pin is enable, after that the data is sent in JSON format. All is working well till here. But I want to introduce a value from webpage to ...
0
votes
1answer
2k views
arduino leonardo avrdude: butterfly_recv(): programmer is not responding
I am having issues uploading new code to an Arduino Leonardo board. This happens after uploading a previous buggy code (e.g. array out of range indexing error). Once I fixed the buggy code, I can ...
1
vote
0answers
100 views
Arduino leonardo + OV7670 non-FIFO
I want to transfer image to PC via Arduino leonardo.
OV7670 is non-FIFO, and no SD card connected.
I followed this blog and this youtube video.using this code.
when uplaod, I got errors below:
...
1
vote
1answer
532 views
Failed to initialise SD card on Leonardo
I'm trying to connect SD card reader to my Arduino. For testing i'm running CardInfo example.
It seems like it runs ok when I'm running it on my Arduino UNO, but it fails to initialise SD Card while ...
0
votes
1answer
677 views
RX/TX not working as intended
I am currently working on a project with a HC-06 module. I hooked it up accordingly like so:
Arduino -> HC-06
5V -> VCC
GND -> GND
TX -> RX
RX -> TX
and I ran this code:
void setup() ...
2
votes
1answer
762 views
Arduino Leonardo RX TX mystery
I'm at the tail end of a project using a Leonardo, a HC-06 bluetooth module and a few cell phone vibration motors. Everything is working fine except the serial communication between the Leonardo and ...
-1
votes
1answer
119 views
Running multiple programs with one Arduino [closed]
Is it a problem to use multiple softwares to read the data that came from the same USB port simultaneously?
I have a board connected to a PC by USB, which is read by an application developed in C#. I ...
1
vote
1answer
588 views
Reading Arduino Serial Input
I am reading an input from my Ohaus weighing scale using it's RS232 output using this code:
#define HWSERIAL Serial1
void setup() {
Serial.begin(9600);
HWSERIAL.begin(9600);
}
void loop() {
...
1
vote
1answer
256 views
DAC using Arduino Leonardo
I am as new to Arduino as it can get. To start off, I am trying to build a DAC using an Arduino Leonardo. I have a digital signal coming from my dual differential comparator. I want to convert this to ...
0
votes
2answers
3k views
Unable to use Keyboard library with Arduino UNO even after changing the firmware
So I'm trying to use my UNO as an HID device. I followed this tutorial, flashed the firmware and got the UNO to be detected as an HID device.
However, I am still getting the error
'Keyboard' not ...
