An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
1
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1answer
22 views
Port Not Being Found
Hey everyone I know this is a pretty common question, and I have read/tried almost everything on all the other posts here and on the arduino.cc forums, but I have been unable to fix my problem. ...
1
vote
5answers
77 views
How accurate is arduino time keeping?
I want to use my arduino to turn a light off for 16 hours and on for 8 hours. I know the general code, just using delays and the relay shield code as well. I want to know how accurate this will be? ( ...
0
votes
1answer
16 views
Upload code on Arduino Leonardo using command line
I'm tryng to upload a compiled .hex file on an Arduino Leonardo, using the terminal. Uploading a sample code using the Arduino IDE works well, and from the Arduino IDE I got the upload command
...
0
votes
1answer
24 views
AVRDUDE Error (Arduino Leonardo)
I, like many others have encountered the avrdude error, however I am not sure how to go about fixing mine after looking at numerous forums, etc.
avrdude: verification error, first mismatch at byte ...
0
votes
1answer
10 views
Arduino Wireless SD Shield
Is it possible to use the Wireless SD shield without the wireless function, or XBEE Module? I do not need it to be wireless it simply was cheaper than any other I could find, so I was wondering if it ...
1
vote
0answers
30 views
Leonardo connect to keyboard on laptop [closed]
Hello i want to make an interactive dj booth.
When someone touches the foil the sound appears.
How do i connect the leonardo to a keyboard.press('n')?
And connect the board to foil so when you touches ...
0
votes
0answers
49 views
Permission problem Arduino Leonardo uploading in ubuntu 16.04
So I think I have tried everything in order to upload code from ubuntu from a non-root account.
The root account uploads problems fine:
avrdude: ser_open(): can't open device "/dev/ttyACM0": ...
0
votes
0answers
22 views
High Voltage/ High Current Problem?
I am planning on building a pump and will be using a High Torque Nema 23 CNC Stepper Motor 3.5A 3Nm(425oz.in) 23HS45-3504S. Because of the voltage difference I will need to use a driver which I have ...
0
votes
1answer
33 views
Peristaltic Pump Project
I am designing a peristaltic pump and need some advice for parts. I am using an Arduino Leonardo and also have an UNO and am planning on adding a temperature and pH sensor as well. I have two ...
1
vote
0answers
17 views
arduino leoanrdo based h keyboard
I just want to configure my laptops keyboard buttons a,s,d,f,g,h and j. I wrote this code and it works for only a but I couldn't configure other buttons.
Code is:
#include "Keyboard.h"
const int ...
0
votes
1answer
27 views
Serial Communication to wpf (windows presentation foundation) Giving me odd results. How do I clear up the Strings I am receiving
Ok, So I'm trying to make a voltage/temp logger that will post to SQL. I'm using a WPF to make kind of a UI for people to measure the voltage of a cell, and take the temp of the battery acid in the ...
0
votes
0answers
18 views
Cannot connect device with nRF8001 Bluetooth LE to Windows 10 PC
I've built a device using an IMUduino board, which is supposed to be similar to Arduino Leonardo board with a nRF8001 bluetooth. I was able to connect my device to an Android phone using the nRF UART ...
0
votes
0answers
5 views
Xbee communication error
I'm developing a satellite which sends sensor data via Xbee (in space we are not gonna use Xbee but a card with same protocol so we are using Xbee for prototyping.). In first tests, we can send a test ...
0
votes
0answers
12 views
DFRobot 4wd pirate mobile plateform with Ultrasound Obstacle Avoidance
I have problem with uploading the complete program on the robot arduino,
this the code I am using
/****************************************************
* DFMobileAvoidanceInfrared
****************...
0
votes
1answer
79 views
press windows key using keyboard.press();
Is it possible to allow an arduino Leonardo to simulate pressing the windows key using the keyboard.press(......); command? If so, what is the required value?
1
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1answer
33 views
How can i set 4 Arduino Leonardo PWM-ports between 200Hz and 1kHz?
I've noticed that I can set D9, D10, and D11 to around the timer 1 can be set to ~244Hz, however i need 4 ports that are between 200-1000Hz but have been unable to figure out how to find the last one. ...
3
votes
1answer
23 views
Arduino Leonardo runs unusually hot
I have a genuine (purchased from Adafruit) Arduino Leonardo that I have had for 2 years and I have not had any issues with. However, I have always noticed that it seems to be running suspiciously hot ...
5
votes
2answers
74 views
Practicality of recording speech
Is it practical to record speech with the Leonardo?
I want to record speech via a MEMS microphone and stream it over a serial connection to a Raspberry Pi for speech-to-text processing.
This article ...
1
vote
0answers
45 views
master slave control of 2wd robots using xbee
Hi there I just need to ask you how I can send command from master robot to slave to follow using Xbee. I have configured both the xbee in AT mode, but I totally dont have the clue how the program.
I ...
1
vote
1answer
33 views
Keyboard input arduino speed
I have an Arduino clone of a Leonardo and I was just wondering how many keyboard commands I can send to the computer per second via USB. I'm not talking about the delay between send and receive (...
0
votes
1answer
34 views
Trying to start a timer to change lights when a button is pressed
I am trying to setup a series of lights (traffic lights) that change based on a timer that begins when a button is pressed. The goal is to use the lights to track how long its been since you pressed ...
1
vote
1answer
63 views
Why is the nRF24L01 not working with Arduino Esplora?
I am working on a remote control car from an Arduino Esplora board and the Mega 2650 Board. My problem lies with the Esplora board as the nRF does not transmit like it is supposed to or does not even ...
0
votes
1answer
23 views
How to combine Leonardo with Ultrasonic sensor?
I am working on an Arduino project that replaces the computer mouse. I want to do this in combination with an ultrasonic sensor. I found some nice examples on youtube, but they didn't post the code. ...
0
votes
2answers
49 views
Arduino Leonardo Pro Mini will not begin sketch when connected to BIOS not an OS
I have an Arduino Leonardo that I am using to emulate a Keyboard using the keyboard.press function with the Keyboard.h libraries. I have gotten the Keyboard.press function to work on my windows and ...
1
vote
0answers
66 views
Need help with Leonardo and HID code
I have a challenge I can't solve, I need your help!
I have a car cruise control lever I want to connect to an Arduino Leonardo and have it act like a keyboard (HID).
The lever has only two wires, ...
1
vote
0answers
76 views
Arduino IDE programs Leonardo but cannot open serial terminal
I'm using Arduino: 1.6.7 (Mac OS X 10.11.3), Board: "Arduino Leonardo".
When I try to program my code, it works without problems.
When I want to open the built-in Serial Monitor or Serial Plotter, ...
2
votes
1answer
71 views
ATmega32U4 (Leonardo/Pro Micro) bootloader, 8K rather than 4K?
Recently hit the dreaded 0x7000 / 28k~ AVRDUDE+LUFA limit. It states everywhere this is because the bootloader uses 4KB, thus reducing the 32KB to 28KB. Makes sense, except...
Blank sketches on the ...
0
votes
1answer
50 views
arduino flexbot drone connected in a wrong way
I have an arduino flexbot, I was making some test and accidentally I connected the battery in the opposite way. The drone turned on the six motors when I connected the battery, but any led turned on ...
0
votes
2answers
83 views
How to diagnose unresponsive Leonardo serial port?
I was using an Arduino Leonardo (in the form of an RPI hat) to control a single DC motor via a motor controller. I have it wired to set Phase and Enable to control motor speed and direction, and I ...
0
votes
1answer
138 views
Recovering from lost USB connection (Leonardo to Raspberry Pi)
I have several Arduino Leonardos connected to a Raspberry Pi (running Ubuntu) via USB. They appear as /dev/ttyACM0, /dev/ttyACM1, etc.
Occasionally, one will disappear and even pressing the Arduino'...
2
votes
2answers
166 views
Pinout for Leonardo USB
According to the docs, the Arduino Leonardo uses digital pins 0 and 1 for the USB D- and D+ lines. However, which is which? e.g. is D0=D+ or is D1=D+?
To save space in a very tight project, I want to ...
2
votes
1answer
173 views
RF24 tranceivers: trouble with two way communication
I am using RF24 modules with my two Arduinos Leonardo with the RF24 library. My goal is to be able to press a button on the first Arduino which will light up an LED on the second Arduino, and be able ...
1
vote
1answer
106 views
How to send a pitch bend MIDI message using arcore?
I'm new to MIDI and started playing with an Arduino Leonardo and arcore.
Based on the example code, I can easily send noteOn/noteOff/controlChange messages, but I can't seem to send a pitch bend ...
0
votes
1answer
37 views
Different behavior than in simulator: 5V pin works instead of GND. Why is that?
I use this simulator to check if what I want to do works. This is how it looks like:
I've recently realised that I've connected my RGB LED to 5V pin instead of GND like on schema. It worked ...
1
vote
2answers
92 views
How to learn electronics/programming with Arduino? [closed]
I want to learn core and mechanics of microcontrollers with Arduino, and I don't really know where to find good source of knowledge.
Every Arduino related tutorial is about very basic stuff like ...
1
vote
1answer
40 views
How to get started? [closed]
I'm a guy who loves the tech world, but more in particular the Robotic one.
I wanna start developing/making my first creations of robots or sort of.
I won a little board from Texas Instrument from the ...
0
votes
0answers
213 views
Changing name of usb device?
I've successfully setup two joysticks using leojoy, everything works fine but both joysticks have the same name in windows joystick properties (Leojoy!) and my games get confused about which joystick ...
1
vote
2answers
95 views
How to send volume +/- on Mac/OSX from Leonardo
I saw this answer but I can't find the analog for Mac.
I've tried cycling thru keycodes from 0x01 thru maybe 0x500, and I went thru ascii a few times, also found brightness up/down, and F11, F12, but ...
0
votes
1answer
41 views
Arduino Leonardo bugs and lack of removable microcontroller
Following one of the article from 2013 :
Before you start hammering that “add to shopping cart” button, note
that the general impression around the web seems to be that the
Leonardo still has ...
0
votes
0answers
267 views
Can BUS Shield on Arduino Leonardo - Can't init CAN
I'm hoping to get some help with this as I am unable to get the CAN to Initialize.
I have the sparkfun Can-Bus shield: https://www.sparkfun.com/products/13262
and an Arduino Leonardo board.
I'm ...
2
votes
1answer
268 views
Keyboard.print() skips keys
I'm playing with the Arduino Leonardo Keyboard.print() command, but I'm facing a annoying problem:
When I print a double quote, it will not appear and also will make to disappear the next character (...
1
vote
0answers
77 views
Is my leonardo broken? Is there a way to make it work?
backgrounds
I bought arduino leonardo and connect it to Ubuntu 15.04.
With arduino IDE 1.0.5(from Ubuntu official repo) running in sudo, the arduino was recognized as /dev/ttyACM0.
So I tried to ...
1
vote
0answers
39 views
Pro Micro and LilyPad USB
Is there a difference between Pro Micro 8MHz 3.3V and LilyPad USB bootloaders?
Both are based on 32U4 running at 8 MHz.
0
votes
1answer
157 views
Arduino Pro Micro Analog Pinouts
I have the Arduino Pro Micro and I would like to use all the analog pins that I can on it.
It currently looks like it has a total of 9 Analog pins that can be used.
A0, A1, A2, A3, A6, A7, A8, A9 ...
4
votes
1answer
15k views
How do you use SPI on an Arduino?
With reference to the Arduino Uno, Mega2560, Leonardo and similar boards:
How does SPI work?
How fast is SPI?
How do I connect between a master and a slave?
How do I make an SPI slave?
Please ...
1
vote
0answers
56 views
can this piece of a camera flash send an input signal to my arduino?
I have a piece of a broken camera flash (an old Yongnuo one) that has a single pin that tells the flash when to fire. The pin looks like this :
(I guess the ring is the return/ground?)
The other side ...
3
votes
1answer
95 views
Two Leonardos on one USB hub - not working properly
I have two Arduino Leonardos here. They do different things, but basically they both emulate a keyboard. Here is an example:
const byte SWITCH = 12;
void setup ()
{
Keyboard.begin();
pinMode (...
1
vote
1answer
187 views
Loading Leonardo bootloader to Atmega32U4 running at 8 MHz
I am currently using ATMega32U4 running at 16MHz using Leonardo. I can only supply 3.7V (I use LiPo batteries) and everything seems fine but this is not as per specs.
To run at 16 MHz, I have to ...
2
votes
1answer
119 views
How to calculate voltage?
I want to check each cell voltage using arduino.
and how to calculate dc current using CT Sensor using Arduino?
0
votes
1answer
404 views
Did I break my new Arduino Leonardo Eth by restarting it?
I just bought a new Arduino Leonardo Eth, and, it was working perfectly.
I probably uploaded about 30 different sketches, and it did everything as expected.
The basic sketch was using the fade demo ...
