All Questions
0
votes
0answers
21 views
Why are some letters reserved?
I wrote a function that takes characters and noticed that the Arduino Compiler treated some characters like system-reserved, and other like functions, and a few just like characters. Lowercase doesn't ...
0
votes
1answer
14 views
what boards have integrated USB charging?
I've been building wearables, using the adafruit trinket, which I love, its small size is easy to tuck away. but I hate having to unplug the battery to charge it every time. I wired in a SPDT switch, ...
0
votes
1answer
12 views
Library, instantiation of a class object
I am python experienced, an arduino noob, and absolutely no experience of C other than what has been forced upon me by arduino use.
I have just spent a day hammering google for the precise syntax of ...
0
votes
2answers
30 views
Re-enable Arduino after short
I happened to short-circuit my Arduino by mistake. It was powered by USB on my Windows 7. The OS was so smart to pop-up warning about USB power surge and shut it down immediately. Arduino survived.
I ...
0
votes
0answers
38 views
Can I operate a switch on/off automatically using Arduino?
I want to develop an Arduino controller which will send signals to transfer switch.
The inputs are from the utility source supply and generator source supply. If either of the source supply fails it ...
-1
votes
1answer
25 views
I need help purchasing materials for a arduino fpv quadcopter
I am an absolute noob in FPV quadcopters and quads in general. My aim is to create a simple quadcopter with a live video transmission. Based on my research I need:
4 rotors
4 Props
4 Electronic ...
1
vote
1answer
13 views
PN532 shield + RFM69 wiring issue
Given a standard Arduino Uno, I installed the PN532 shield and it worked fine reading tags as expected.
Then I soldered on a RFM69 onto the proto space of the shield and soldered up the wiring - the ...
0
votes
0answers
23 views
How to upload sketch from Uno to Pro mini without removing Atmega328p
I know there's a lot of tutorials out there already about how to upload a sketch to Pro mini. However a lot of them doesn't exactly fit what I'm looking for.
What I'm looking for it a way to ...
0
votes
0answers
23 views
Arduino and industrial stepper driver
For a project I need to use an industrial stepper driver with an arduino. There it is: http://www.omc-stepperonline.com/bipolar-stepper-motor-driver-max-4a-current-40vdc-input-16-subdivision-st6600-p-...
0
votes
0answers
42 views
Protocol suggestions for an ESP8266 based WiFi LED solution
I am working on a commercial design which is basically a WiFi based LED Light. I have an ESP8266 WiFi module as my main controller. I have used a simple HTTP Protocol to communicate with the Light ...
1
vote
0answers
15 views
Send and Read packet xbee AT mode
I have a simple network created using Xbee series 2 devices.
My network is very simple, my end-device with Arduino UNO read a temperature and Lightning, display this value into LCD and send using Xbee ...
-4
votes
0answers
32 views
4 IR sensors on Arduino pro micro
I connected 4 IR infrared sensors to Pro micro and only 2 of them are working. The other 2 are sending random values. There is no problem in my code.
What could be any other problem?
0
votes
1answer
21 views
Stepper motor release L298N
I'm Driving a stepper using a L298N driver and an arduino mega. I want to release the stepper after the movement so it can swing freely, because it gets hot, and it doesn't need to hold position.
...
0
votes
4answers
48 views
How to control an Arduino connected device accross the Internet?
Actually i am trying to do IoT based work.
Until now the sensed data(temperature and humidity) has been made available to only for one user on the Internet using Apache tomcat. So far we have just ...
0
votes
1answer
39 views
USB Communication like serial RS232 with an Attiny
Basically I want to use an Attiny running an Arduino boot loader as an usb device. I'm not sure how to even start or what phrases to search for.
So here's what I ultimately wish to do.
Load a ...
0
votes
0answers
28 views
Forcing Arduino IDE documentation (help) to open in browser in offline mode
Even though the help files (e.g., reference) are installed as local files when the IDE is installed, these file still attempt to access the net. For example, loading an arbitrary page makes calls to ...
1
vote
1answer
28 views
Can I avoid having a bootloader if I use ISP to flash to an arduino?
My Trinket Pro waits about 10 seconds upon booting before starting the program that I have loaded on it.
Can I avoid this delay and the bootloader taking up space if I flash my program directly to ...
3
votes
3answers
45 views
Arduino not running the sketch with external power supply of 9v, but runs the program when connected to pc
Can anyone please help me figure out/ point the reason of this arduino problem? I uploaded a simple arduino sketch (blink an LED ) just to test if my real program was the reason of the "abnormality" ...
1
vote
1answer
26 views
Arduino Micro “Keyboard Not Found”
This is my first script written with Arduino. I wrote a simple Hello World program but I'm getting the following error.
Test:18: error: 'Keyboard' not found. Does your sketch include the line '#...
0
votes
0answers
9 views
MKR1000 and AD9833
We're having problems with communication between an Arduino MKR1000 and AD9833 (waveform generator) over SPI. When we use an Arduino Uno, the SPI communication works fine, but the same code refuses to ...
0
votes
2answers
32 views
Continuous Rotation
I was wondering how can I make a Servo rotate continuously by using an Arduino code.
I looked through several forums and websites already, but all of them just show how to make it run by changing the ...
-6
votes
0answers
31 views
Need help to understand an error message
Arduino: 1.6.10 (Windows 10), Board: "Arduino/Genuino Uno"
Sketch uses 1,050 bytes (3%) of program storage space. Maximum is 32,256 bytes.
Global variables use 13 bytes (0%) of dynamic memory, ...
0
votes
1answer
41 views
How to calibrate a PID?
I'm working on a pid-controlled levitating magnet device. It uses a hall-sensor to turn on and off an electro magnet in ordet to achieve levitation.
When I hold a magnet close to the hallsensor, I ...
0
votes
1answer
21 views
Arduino ov5642 camera yuv422 output
Currently, I'm implementing arduino camera ov5642.
But especially, I can't understand the camera output at yuv422.
that spec wrote as yuv420 output sequence YYYY.../YUYV...
Actually, I don't ...
2
votes
0answers
35 views
Faster output of Serial.print() data coming from TSL1402R sensor [on hold]
I am reading a TSL1402R with an Arduino Mega2560. The code is based on the sketch from the arduino playground here:http://playground.arduino.cc/Main/TSL1402R
The application is a digital caliper for ...
3
votes
2answers
46 views
Sound Recognition
I'm looking to recognize a particular sound using arduino uno.
I need to recognize a clap sequence to trigger a relay.
Having given it some thought i need it to be continuous listening mode with out ...
0
votes
1answer
22 views
L298N vs Motor Shield R3
I'm new to Arduino and need some clarification on motor drivers.
I was wondering if I can use a L298N instead of the Motor Shield R3, I hope not to be comapring apples to oranges, the doc of the ...
0
votes
3answers
424 views
Problem understanding code
This is a segment of an Arduino sketch, that I am trying to understand.
I know that the purpose of the entire code is to control 2 stepper motors linked to their respective drivers which are linked ...
3
votes
3answers
55 views
Running quartz clock off an arduino
I am trying to run a clock off of an arduino following this site: http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/ and I tried to combine it with this to get it to ...
1
vote
1answer
39 views
Regarding Arduino Mega hardware serial
I have a doubt interfacing with fingerprint module (R305) with the Arduino Mega.
I have been able to interface it to Arduino Uno before but not Arduino Mega so far.
I have used the Mega's hardware ...
3
votes
1answer
58 views
How can I use stepper for specific degree?
I use Arduino and I'm beginner. I use the code below, but I don't understand what stepper.step(num) and STEPS in Stepper stepper(STEPS, 2,3,4,5) are, and I want to use stepper for specific degree and ...
0
votes
1answer
14 views
How do I output tone() and audioFX board output through a single speaker?
I'm building a BMX start gate controller. It requires a voice sample to be played ("Riders ready, watch the gate!") before playing a series of tones at very specific frequencies and intervals. After ...
0
votes
0answers
21 views
Arduino IDE in conflict with pyserial for use of serial port in OSX Yosemite
I'm trying to communicate with an Arduino Uno via pyserial using a code that I wrote for Ubuntu. However, when I try to use the same code in OSX Yosemite after identifying the serial port for the case ...
0
votes
1answer
20 views
Arduino IDE crash when I connect Blend Micro
I recently bought Blend Micro and I am setting up Arduino IDE to start using it, but after installing the required libraries and the Blend Micro drivers, the IDE suddenly crashes without any visible ...
1
vote
2answers
36 views
Making a current GPS code run once, and only once, after the code is 'activated'
I have a GPS code that I need to run only once, but every different try gives me errors, including placing the whole code in void setup(). Is there any way that this code can be run just once? As of ...
0
votes
1answer
16 views
Clear GET params from URL [duplicate]
I have a simple GET webform that takes in text. Once that text is submitted the URL permanently displays the text as the parameter. This causes echoing issues when I check the input from the web form; ...
-1
votes
1answer
25 views
Multiple client server over wifi
Trying to setup a server on Arduino to support multiple clients,
I am able to support one but I don't want to flush that client to make another connection.
#include <ESP8266WiFi.h>
const char* ...
1
vote
1answer
22 views
not able to tick the checkbox of page generated by client object
I have green LED attached on Digital pin 2 which is by default set to LOW,
and I am trying to turn it on and off from a checkbox added on web page as shown in the code below, but I think something ...
0
votes
1answer
19 views
What pin is the external interrupt #0 for an arduino micro?
I'm putting an MPU6050 on an arduino Micro but the interrupt is different than the arduino uno. The external interrupt #0 pin on an arduino uno is pin 2 but its not pin 2 on an arduino micro. So I'm ...
1
vote
1answer
49 views
Will a transistor always reduce the voltage? [on hold]
I have an NPN transistor that's connected over a 12V adapter. I have tried using a potentiometer to change the resistance of the incomming current. Even if i take the resistance down to 0, I end up ...
0
votes
2answers
42 views
Power an arduino on a 12V circuit
I am doing a simple circuit with a 12V power supply to power a 12V LED strip. I'd like to be able to switch ON/OFF the strip with a relay connected to my Arduino. I'd like to know if I can power my ...
0
votes
0answers
26 views
Arduino TIAN - how reset to factory settings?
I recently bought Arduino TIAN which has some version of Linino on it. There is an initial description on how to proceed on the Arduino.ORG site. I followed it. As a result, I cannot access the ...
0
votes
2answers
53 views
Powering 24 volt solenoid valve with Arduino uno
Today I received normally closed solenoid valve which I am going to use in automated pot watering system ,
I realised the valve takes 24 dc volt as input and Arduino has maximum of 5volt , using some ...
0
votes
1answer
53 views
Shrink array to save memory
In my project I need three arrays to store data inside.
I define a maximal number of elements as a macro variable. However, at a certain point in the setup function, the program could determine, that ...
0
votes
2answers
43 views
The easiest and most time efficent way to connect to the internet regardless of the cost
I am working on my graduation Project. I want to use the cayenne (mydevices) platform to control my Arduino. Mainly I want to be able to control a servo Motor through the Cayenne app and I want to use ...
0
votes
2answers
36 views
Cannot set Pins to LOW
I am controlling 2 motors from my Arduino Pro Mini and L293D motor driver module. Problem is, I have to set a pin high and after 1 second set it to LOW. But that doesn't happen... The pin just stays ...
0
votes
1answer
29 views
Comma between two values in a macro
I am working on a project involving an Aduino and screen.
As i was going through the u8glib (Arduino Monochrome Graphics Library for LCDs and OLEDs), something caught my attention:
#define ...
0
votes
1answer
48 views
Shared 5v power for Due dedicated application
I would appreciate input on this situation:
I plan to power a fairly high current, 5 volt supply, 3.3v signal, device from a suitable wall wart. I would like to power the due that controls it through ...
0
votes
1answer
35 views
Cannot assign COM port to HC-05 bluetooth device
I can't set a COM port to my paired BT module. For better understanding I recorded a YouTube video to make sure I show everything.
Hardware:
Arduino Nano knock-off by RobotDyn (atmega168)
Bluetooth ...
-2
votes
2answers
54 views
Lowering cost of using NRF24L01 radio module for communication between several Arduinos [on hold]
I have several Arduino Uno's if I am using several NRF24L01 modules to transmit a simple pulse (1 bit of information which can be high or low) between them-from one Arduino to the rest of them. Then I ...
