Questions tagged as 'arduino'

Tagged questions
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Is there any specific library to work with android and arduino?

I have some automation projects, and wanted to develop my own app, which would control an arduino. With little research, I realized that there are several tools that create this communication and still get you an app ready, however, I would like...
asked by 03.05.2016 / 14:33
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Arduino - matrix 8x8 [closed]

I'm having an array of led 8x8 and an arduino one and I want to display some phrases in the array but I did not find the datasheet in any way. The numbering is HS-2388BS. Is there another way to know which line and column corresponds to the igni...
asked by 24.12.2014 / 02:36
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invalid digit "9" in octal constant arduino

I have a problem with my temperature measuring function. #include "max6675.h" int ktcSO = 8; int ktcCS = 9; int ktcCLK = 10; MAX6675 ktc(ktcCLK, ktcCS, ktcSO); void setup() { Serial.begin(9600); delay(500); } void loop() { Serial...
asked by 31.01.2018 / 16:37
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error: field has incomplete type

I get this error    error: field has incomplete type when doing something like: class MinhaClasse { MinhaClasse teste; // Erro aqui }; I already tried to add this line at the beginning of the code class MinhaClasse; , but it...
asked by 01.02.2018 / 15:39
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Make calculations based on PHP or MySQL averages

A friend created an Arduino project that monitors power consumption in Kw / h. It every 5 minutes inserts the consumption information in the MySQL database. Every 5 records I need to average them, and then take the average and multiply by 15....
asked by 29.03.2016 / 23:14
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Serial Communication With PHP and Arduino

I already have a code in the arduino IDE, in which when I pass the letter 'l', a led will be access, however, I can not access this serial port with PHP, I'm using Fedora 22, Arduino Uno, the codes are below: Arduino code, port used / dev /...
asked by 20.10.2015 / 21:13
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Initiation with Arduino [closed]

I have knowledge in web and mobile programming. I have a huge interest in learning Arduino and integrating my creations on the board with web and mobile systems. My question is: Is it worth messing with Arduino? And if, for example,...
asked by 21.08.2015 / 20:49
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Turn on led with arduino using strings

   Perform code that causes the D1 LED to be off when an odd decimal numeric digit of between {1,3,5,7,9} is sent from the PC to the arduino and lit if the sent digit is between { 0.2,4,6,8}. How would I do this? That's what I've done so...
asked by 11.01.2018 / 19:21
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Arduino: Bluetooth connection, and data storage

I am a beginner and I have some projects in mind, I would like to know if it is possible to connect the phone to the arduino and to make an application pass some data to some memory connected to the arduino and other device to be able to take th...
asked by 17.09.2016 / 23:48
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Interpret the JSON response of a WebService that was called by the Arduino

How do I interpret information from a WebService that was called by Arduino? The WebService returns a JSON and needs to interpret it. An example of the answer can be seen below: [{"valor":"10"}] The code below, obtained from this sit...
asked by 02.12.2015 / 14:53