An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
2
votes
1answer
41 views
What's Leonardo 5V pin current limit?
I'd like to know how much current can supply the 5V pin and the 3.3V pin on an Arduino Leonardo board. I've been lead not to trust the specs on Arduino's website. And, as an added question, can the 5V ...
2
votes
1answer
36 views
Powering ESP8266 from Leonardo's 3.3v pin
I'm new to Arduino, and I'm trying to connect my Leonardo via WiFi using a ESP8266 module. What I want to know is if I can power it directly from the onboard 3.3V pin like in the image:
Or do I ...
1
vote
0answers
21 views
Arduino Leonardo isn't detected by Linux Mint on serial port /dev/ttyACM0
I'm working on Linux Mint 18 Sarah (earlier Ubuntu 16.04 LTS) system. I've installed Arduino IDE using command sudo apt-get install arduino and I've added me dialout group using sudo usermod -aG ...
0
votes
0answers
6 views
Wii mote bluetooth
Im new to the Arduino world. I was wondering if it's possible to connect a wii-mote to an Arduino Leonardo. Should I buy an USB-host with a bluetooth receiver or just a Bluetooth module?
Thank you ...
-1
votes
1answer
21 views
Use a 2.8" TFT with my Leonardo
for 2.8" diagonal color touchscreen TFT:
Readme states:
"Works with any classic Arduino '328. Solder closed three jumpers to use the ICSP header for use with Leonardo or Mega"
What should I solder? ...
1
vote
2answers
91 views
A question about resistance measurement with arduino
Lately I was asking myself about the posibility of measuring a potentioneter resistance with arduino, and my questions are:
1) Is it possible?
2) if it's possible, what kind of restriction the ...
0
votes
2answers
51 views
Sending data via bluetooth
I am trying to both send and receive data using bluetooth module.
Receiving data works fine with this code:
void setup() {
Serial1.begin(9600);
Serial.begin(9600);
}
void loop() {
if ...
0
votes
1answer
27 views
Real Time Clock Module Reset
I just had a pretty simple question about the RTC Clock Modules, more specifically the DS3231 RTC. Once calibrated and running on my Arduino if I were to unplug it and plug it back in, will the time ...
0
votes
2answers
74 views
Converting char array to int
I'm trying to use nRF24L01 module to send a messages between 2 arduinos
Transmiter code:
const char text[] = "Hello World";
radio.write(&text, sizeof(text));
delay(1000);
Reciver code:
...
1
vote
1answer
33 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
105 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
60 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
41 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
15 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
33 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
125 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
26 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
38 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
19 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
44 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
34 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
6 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
17 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
239 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?
2
votes
1answer
47 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
28 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
77 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
48 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
42 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
38 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 ...
2
votes
1answer
97 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
24 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
61 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
68 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
88 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
102 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
55 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
117 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
191 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
174 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
263 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
136 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
39 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
99 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
268 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
108 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
45 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
304 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
293 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 (...
