All Questions
0
votes
1answer
16 views
Arduino Serial Monitor
I am currently trying to see the result of a query to a thingspeak field.
This works great when I just use a empty sketch and type the commands manually, but using the following sketch I cannot see ...
0
votes
1answer
10 views
Error opening serial port '/dev/cu.Bluetooth-Modem'. (Port busy)
I’m sorry if I sound ignorant and naive, but I’m brand new to Arduino; very keen, but know very little.
I started with a Sainsmart Arduino Uno clone board. I downloaded the software, which opened ...
0
votes
0answers
12 views
Why can't I upload the sketch to my Board?
I am using Roboduino board, Whenever I am uploading the blink sketch I am getting following errors. I am using the board from quite some days. But problem is occuring from now onwards.
-- I have ...
0
votes
2answers
16 views
Pause code untill a button is pressed
I need a code to pause arduino code untill a button is pressed. I have a long code and at point i need a condition that if a Button on pin A2 is pressed then go forward, otherwise wait.
I tried using ...
0
votes
1answer
6 views
AVRdude + Arduino leonardo: can't flash over bootloader, not in sync: resp=0x3f
I would like to program an arduino leonardo board with atmega32u4 on win8.1 x64.
I have the latest AVRdude.
I installed the necessary drivers, after reset it can be enter programming mode, and I can ...
0
votes
1answer
20 views
Inheritance: error in calling the constructor of the base class?
I want to write a library for the RGBDigit shield (http://rgbdigit.com/), which essentially is an Adafruit Neopixel strip, packed as a 7 segment display. The shield also has a DS3231 clock and an IR ...
0
votes
1answer
16 views
Using for loop to set pinMode
I notice problems with my output pins when I use this method of setting their pinMode:
int allOutputPins[] = {3, 4, 9, 10, 5, A3, 11, 12, 7, 8, A1, A2};
for(int a = 0; a < sizeof(allOutputPins); ...
0
votes
2answers
17 views
What are some fun things you can do using the ICSP header?
I bought 10 Arduino Nanos for a project, each with all of their headers soldered in place. Each was going to go into a tiny space, so I found myself needing do desolder the ICSP headers.
This led to ...
0
votes
0answers
4 views
SSH and web interface broken on Yun
I have two Arduino Yuns that are not accessible at all on the network. I can't go to the arduinoname.local, ssh arduinoname.local, as I previously could. I know at least one it working because it ...
0
votes
0answers
11 views
How to network multiple Arduinos so they react to the same signal
I want to build a project that contains multiple Arduino nano's, each connected to one controlling Raspberry Pi. I would like to send one signal (a string of characters or numbers) which would be the ...
2
votes
1answer
22 views
How to interconnect multiple Arduinos with a Rpi to control home-lights/switches
While planning the lightning infrastructure (wall-switches and lights) of my new home (it's still under-construction) I choosed to go through the "automated route" way and due to my background (I'm an ...
0
votes
0answers
10 views
Creating a keypad matrix that will communicate wirelessly with an Arduino Uno
I have a 30 button matrix and I would like to use a keyboard encoder to decipher what button was pressed. I would like that information (what button was pressed) to be wirelessly sent to my arduino ...
0
votes
1answer
14 views
Advice on setting up a real-time audio equaliser
First time Arduino user here.
We have a microphone set-up which feeds back loudly on particular frequencies and need an equalizer to (preferably automatically) detect spikes in particular frequency ...
1
vote
0answers
19 views
How to use the eclipse arduino scope?
i am quite new to the arduino stuff. Got the Arduino IDE installed side by side with Ecplise. Using Eclipse with the Arduino plugin is working well for me, including the SerialMonitor.
I am just ...
0
votes
1answer
8 views
arduino due-Python interfacing for high speed data rate
Four our project, I want to send data mesured by an Arduino due to a computer via Pyton very vast. So I tried to make a simple benchmark by sending 10240 int datas to determine the time it take. In ...
0
votes
1answer
14 views
Speaker not producing the right sound after a led strip was introduced
Grove speaker:
http://www.seeedstudio.com/depot/Grove-Speaker-p-1445.html
ws2812-led strip
Hi, I have been working to produce tones on a speaker and it works with the following code
int ...
-3
votes
2answers
26 views
How to blink a series of LED alternately only one at a time
I am very much new to Arduino. I recently bought an adruino uno. i can blink an LED alternately. Such as, 1st blink red, then blink green, then blue like that. once only one LED should blink.
I have ...
0
votes
1answer
17 views
How to use a grove speaker without using delayMicroseconds?
is there another way to replace delayMicroseconds(BassTab[note_index]) as I cannot have delays in my loop due to the need of having multi-tasking in my sketch.
Grove speaker: ...
0
votes
0answers
16 views
Arduino reads bogus from serial
Recently I've started playing around with an Arduino Uno (rev 3), and I've set up a communication bridge between the Arduino and my computer using Python. So I send a command in Python ("ping" for ...
0
votes
2answers
9 views
Serial communication using Arduino and TeraTerm
I wrote a simple serial program using Arduino Mega 2560, it is connected to COMPORT 10. Here is the program I Wrote,
void setup()
{
Serial.begin(9600);
}
void loop()
{
...
0
votes
1answer
26 views
Running both sensor and addressable LED strips at a same time?
I'm trying to obtain the sensors readings as well as making the LED strips to light up at this particular pattern if the sensor readings reaches certain values. But since both of these codes are ...
1
vote
0answers
19 views
Using USB on a Leonardo to receive data from PC
I am new to the Leonardo, having only used a duemilanove before, and I am interested in using it's USB capabilities for a project.
Basically I need it to be an input and output device, communicating ...
1
vote
2answers
35 views
Are there any Analog pins on the mega that can not be used as Digital?
I am using both Arduino nano and Arduino mega boards in my projects. I got a nasty surprise the other day when I learned that, on the nano, Analog pins 6 and 7 can not be used as digital pins.
Are ...
1
vote
2answers
46 views
How can I get a unique address for all my Arduino boards while in RS485?
My attempt is to know how to identify the board I'll be sending parameters to in a serial connection like rs485. I'm asking because I will have about 11 or so mcu's as "Rx slaves" while my pc is the ...
1
vote
2answers
27 views
Stepper Motor Power Supply
Just a quick question. Picking up some stepper motors, but confused at what voltage/current things are running off.
Ordering:
2 x Stepper Motor
2 x EasyDriver
An article says
You need some 12V ...
1
vote
1answer
32 views
How can I stop my Arduino UNO rev 3 from briefly turning on digital output pins on startup or reset?
I am using my Arduino UNO rev 3 to control other devices via the digital output pins. On startup or reset, I find that these pins are all briefly turned on (perhaps as part of a self test). This ...
1
vote
2answers
53 views
Im looking for a way to Serially communicate with a multi mesh Arduino Slave Network
I have one PC running Visual Studio and a program that will be sending commands to Arduinos Via Serial "COM Ports". So in 11 MCU's "nano" I will have motor drivers L293D/L298N IC's while in other ...
-1
votes
1answer
20 views
Replacing atmega8 with atmega328 on Arduino Single-Sided Serial Board
i want to know that if i use atmega328-pu instead of atmega8 on this design provided by "https://www.arduino.cc/en/Main/ArduinoBoardSerialSingleSided3", will it works fine on this design or i have to ...
1
vote
1answer
51 views
what is the importance of the resistors that connect to push buttons ? can i replace them by wires?
Please, iam a junior in arduino and i want to know what is the importance of the resistors that connect to push buttons? can i replace them by wires?
thanks in advance.
1
vote
1answer
16 views
Arduino Command Line Interface - How to change boardsmanager.additional.urls
I am building a Travis CI job to test my Arduino Library and it needs to install external board definitions.
Is there a way that I can set the boardsmanager.additional.urls from the command prompt ...
0
votes
0answers
18 views
Durable, thump resistant, buttons, at a cheap price
Not really an Arduino specific question, but I guess a lot of people on this board are also hobbyists, so they might have done something similar...
For my project I need to connect buttons to the ...
0
votes
2answers
22 views
Assigning value inside structure array outside setup and loop functions
I'm having some difficulty assigning a value to a variable in a struct array outside the loop and setup functions. Assigning a value to an int or char array works completely fine but this doesn't.
...
0
votes
1answer
32 views
'Simple' problem. Delay not working?
Servo goes to one end, and immediately travels back without a 2s delay inbetween. After it travels back there is a 2s delay before it loops. Why isn't there a 2s delay before the travel back?
Servo ...
0
votes
1answer
8 views
Can't get values of max232 with loopback
I didn't find answers which solves my problem with the max232 yet.
I connected it like this to my Arduino uno, so my Arduino provides the +5V VCC and the ground:
max232 connection
The only thing ...
0
votes
1answer
47 views
Can anyone identify why this incrementer is losing count?
I am working on a project where the end result is to count the number of cycles of a moving piece of metal using an inductive sensor.
For now I am using an Arduino Uno and have created a breadboard ...
0
votes
2answers
19 views
Light communication from pc/app to arduino
I will like to implement a serial communication protocol, using javascript in a mobile browser to make the browser background blink (alternating the color from black to white) according to the bits, ...
0
votes
1answer
25 views
Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock [duplicate]
Burning question:
So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...
0
votes
1answer
23 views
Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock
Burning question:
So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...
0
votes
3answers
27 views
How to store IR data needed for AC controll in less space?
I'm trying to controll an AC unit but the issue is space - right now, I store the data like this:
consts PROGMEM unsigned int Signal_Heat_Fan0_Temp30[] = ...
0
votes
0answers
17 views
Character updating sketch not working
I've got this sketch to update the character set of my MAX7456. The chip is on a board like this. I use Teraterm as instructed here. The upload completes. But the end result is this:
Every second ...
0
votes
2answers
33 views
How to measure nitrogen flow through a tube?
I am looking for a simple way to detect nitrogen gas flow through a tube. I don't even need any sort of precision, just really need to know if flow exists or not.
What are some options I could pursue ...
1
vote
1answer
24 views
How can I configure Arduino after programming it (for post upload wifi configuration)?
I would like to make a device that can take a photo, and send it to a website over wifi. I'm using an Arduino Uno, a ArduCam OV2640 module, and ESP8266 Serial WIFI module. Eventually I'd like to take ...
-1
votes
0answers
15 views
Lithium ion battery to power Arduino UNO R3, 4 micro servos and potentially a joystick? [on hold]
I'm a bit new to certain aspects of Arduino, but I know enough to know that a 9v battery isn't going to cut it here. Details:
- I've got 4 TowerPro SG90 servos hooked up to it (all are hacked to be ...
0
votes
1answer
30 views
Microphone input into Arduino uno R3
I have an amplifier circuit for a microphone.The output of the circuit(the microphone signal amplified) is connected to the arduino A0 .Now the circuit works(I think ,the output voltage is 4.30 V) and ...
0
votes
0answers
16 views
Portability and selection of Arduino
I have written some code for Arduino Uno, which is an ATMEGA microcontroller based device. Can I port the same code over to Arduino Due, without having to make any changes. Arduino Due is a ARM based ...
0
votes
1answer
41 views
problem with using String()
I'm new to arduino and currently trying to build a small program with multiple screens and buttons and a counter. when I try to convert a int to a chararray it messes up the world. with out it what ...
0
votes
1answer
28 views
Does Anemometer consumes power?
I planning to add an anemometer to my small solar weather station.
I designed this system to run from a single 3.7v rechargeable battery and a solar panel so I have to calculate in more power drain.
...
1
vote
2answers
63 views
Optimizing an Arduino code
I am working on project and using Arduino Pro Mini (Atmega328p running on 2xAA) to measure the time to charge a capacitor (when the volt level is high). This is the code I used while testing:
int ...
0
votes
2answers
56 views
Student Project Inquiry(Building a Self Balancing robot)
I am currently building a self balancing robot using an L298N motors driver,and MPU6050 using an arduino microcontroller.
I managed to control my motors movements with no issues. After I extracted ...
1
vote
1answer
27 views
Execute Code sent over Serial
I was wondering if its possible to send code to the Arduino, and then have it execute this code.
What I'm trying to do is use an Arduino Mega with a bunch of stuff connected to it send code to an ...
