Questions tagged [arduino-ide]

This is for questions about the official IDE. The open-source IDE makes it easy to write code and upload it to any Arduino board. It runs on Windows, macOS and Linux.

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89
votes
22answers
17k views

What are the other IDEs for Arduino?

The basic Arduino IDE lacks a lot of the sophistication present in other IDEs such as code completion, code collapsing, folder organisation, etc. Are there other IDEs that allow programming in C or C++...
1
vote
1answer
235 views

Wanted to control 2 servos with serial read [closed]

I want to use 2nd servo only when 1st is in up state by asking user whether he wants to fire or not.(code in bold is not working ) #include <Servo.h> Servo myservo; Servo trigervo; ...
37
votes
3answers
43k views

Why does starting the serial monitor restart the sketch?

If I upload any sketch that sends serial data, I immediately see the TX/RX LEDs flash once the sketch is uploaded. If I then start the serial monitor, the sketch appears to restart. A bare minimum ...
6
votes
1answer
4k views

Adding a custom board to the Arduino IDE

I would like to know what is the procedure for adding a custom board to the Arduino IDE? My custom board is similar to the Arduino Zero. Instead of using the ATSAMD21G18, my board is based around the ...
93
votes
9answers
231k views

C++ vs. The Arduino Language?

What are the advantages of each language when using the Arduino? I'm thinking this is a good general question, but I'll add a bit about why I'm asking if anyone wants to give me a tip. I'm ...
4
votes
3answers
26k views

How to convert an hex string to an array of bytes?

How to convert the char array to Byte array? I tried every method but it doesn't work. char CardNumber[8] = "B763AB23"; // Length is 8, basically it's in Hex // B7 63 ...
1
vote
1answer
3k views

Arduino Uno and ESP8266 serial monitor issue

I plugged in the Arduino Uno and the ESP8266 following this schema: When I enter "AT" in the serial monitor, I get an "OK". I can also connect to my wifi using typical ESP8266 commands. What doesn't ...
8
votes
2answers
41k views

avrdude ser_open() can't set com-state

When trying to upload the blink sketch to my (unofficial) Arduino Uno, I get the following error: avrdude ser_open() can't set com-state for "\\.\COM3" I have programmed this Arduino before using ...
1
vote
1answer
1k views

Avrdude Verification Error while flashing Arduino Mega code

I'm working with an Arduino Mega 2560 and am getting the following error at compile time: avrdude: verification error, first mismatch in byte 0x0000 0x14! = 0x25 avrdude: verification error; ...
0
votes
1answer
1k views

Why is the IDE not able to find the board despite it being clearly seen and selected?

i'm having an odd problem where despite having the correct port selected 3 times i'm still getting an error as shown below: message: Arduino: 1.8.9 (Windows 10), Board: "Adafruit Feather M0, ...
18
votes
5answers
73k views

deprecated conversion from string constant to 'char*'

What does this error means? I can't solve it in any way. warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
4
votes
3answers
56k views

Arduino Nano v3.0 with ESP8266

I am attempting to connect and use an ESP8266 board with my Arduino nano v3.0 and I am not have much luck. I have read a bunch of tutorials and articles, the most recent is http://elektro-blogger....
10
votes
4answers
58k views

Arduino compatible's serial port not showing Mac OSX

I bought an Arduino-compatible Freaduino board atmega8 (I selected the board type as Arduino ng or older atmega8). I installed the Arduino IDE on Mac OS X and the FTDI drivers. But my serial port ...
9
votes
3answers
3k views

Hiding WLAN password when pushing to GitHub

I have started to use GitHub to store Arduino code. However some of my code uses the SSID and password for my WLAN which I don’t want published. A common way of handling this in non-embedded ...
1
vote
1answer
2k views

How to configure 2nd Quadrature Decoder IO pins in Arduino IDE

I am working to read two quadrature encoders using a single Arduino DUE, as part of my summer vacations project. According to the following link http://atmel.force.com/support/servlet/fileField?id=...
5
votes
2answers
63k views

“stray '/302' in program error” when compiling

For some weird reason, the following code doesn't compile. I get a "stray '\302' in program" error around volatile unsigned int encoderPos = 0;, and I have no idea what the issue is. I've been trying ...
7
votes
4answers
7k views

Can I use Visual Studio instead of Arduino IDE?

I think that Visual Studio is a great product! I find the Arduino IDE is limited in its features. For example the Arduino IDE does not have: Code prediction Error highlighting Previews of #define ...
5
votes
1answer
466 views

Referencing local libraries from higher dir levels

How can I include libraries not contained in any direct subdirectories of a sketch, using the Arduino IDE? I want my project structure to look like this: Project └> MCUa └> MCUa.ino └> ...
1
vote
6answers
1k views

How to program for two Arduinos with different code but share one same .h?

I am now programming for two Arduinos. One is used as Tx and the other is Rx. Of course they are programmed by different codes, but they share some same .h files I programmed(let's say 'share.h'), ...
1
vote
2answers
256 views

Generate a true analog signal using Arduino

I am looking for a way to create a true analog output with the arduino uno. I am constantly reading an analog input on a0 pin, all i want to do is send the same signal as output. I know arduino ...
6
votes
3answers
11k views

ESP8266 Analog read interferes with wifi?

Short version: I have a program that connects my ESP8266 to WIFI so I can control a relay connected to it over the internet or a button. I also have a sensor for my door. This software works ...
3
votes
1answer
155 views

How does if(serial) work, a c++ question

The Arduino documentation says if(Serial) always returns 1, except for the case where Leonardo USB serial connection delays becoming ready. (Leonardo has two USB IDs, and switches between them for ...
2
votes
2answers
645 views

Why PJ0 and PJ1 are not reporting as PCINT pins

When the sketch shown at end-of-question is compiled and uploaded to an Arduino board, it is supposed to Serial-print a list of available digital pins, showing for each pin whether it supports PWM or ...
2
votes
1answer
7k views

pass class internal function as callback

I am trying to pass a class internal function as a callback function within the class. The error behavior is similar to this problem. Whatsoever, I was unable to construct working code based on that ...
2
votes
1answer
640 views

How to send UDP data packet between two access point?

I am new to arduino programming and nodeMcu boards.I have two ESP8266 bards as access points and one board get some data form WiFi stations and resend that data to other access point. but the problem ...
2
votes
2answers
3k views

Adding Attiny to Arduino IDE - attiny\variants\platform.txt file missing

I followed this guide to program AtTiny using Arduino as ISP. The problem is that it has some file missing: java.io.FileNotFoundException: C:\...\arduino-1.6.8\hardware\attiny\variants\platform.txt ...
1
vote
1answer
642 views

How to add Ultrasonic Sensor to the board?

I am making an RC car , have combined the Arduino UNO R3 with the AR 293d, and pluged in the HC-SR04 sensor to the SRO4 hole at the left top corner in the below graph. However, besides one sensor I ...
0
votes
1answer
54 views

How to connect accelerometer, GPS, microphone and a GSM module to a Arduino? [closed]

I am a noob in the Arduino world and have only started reading about it. I have zero experience with Arduino some suggestions to increase my level will also be highly appreciated. But I have a lot of ...
0
votes
1answer
188 views

String and heap confusion

I hope you all well. Recently after view unknown crashes I decided it can be related with me messing with "heap" After reading few sources on heaps and how it works it kind of confusing. Some ...
0
votes
2answers
1k views

Making three led's blink at different times in Arduino

I have a breadboard connected to an Arduino Uno, 220k resistors connected to an led, of course it has a common ground and a pin connected to 5v. All pins are digital. Now, I want led 1 to turn on ...
0
votes
1answer
766 views

SD Card Read/Write Arduino Mega Fail

I have an Arduino Mega 2560 where I have used a MicroSD Card Module to Read/Write Data on the Micro SD Card. I have tried using the Example in the Arduino IDE but the data is not being written or read ...
0
votes
2answers
353 views

keypad storing problem (void value not ignored as it ought to be) [closed]

I am trying to input 11 numbers only by the use of keypad but the problem is whenever i use this code. It gave me this error. Here's my code. Help please. #include <SoftwareSerial.h> #include &...
-1
votes
1answer
665 views

NodeMCU and expected ';' before wrong ' " '

I am creating a home weather station but the Arduino IDE shows "expected ';' before 'viewport'". It detects wrong quotation marks. My code: String message2 = "<!DOCTYPE html>"; ...
-2
votes
1answer
77 views

Code for fish auto feeder not working [duplicate]

I've been trying to make this code work, but for some reason, it doesn't work for me, even if I do everything like in the tutorial. So I've tried to do a new code and the outcome was the same. The ...
13
votes
4answers
59k views

Program an ATMega328P and use it without Arduino board

I'd like to use an ATMega328P for my project, I hope to do it without the Arduino board. I know with the Arduino IDE and an Arduino board I can program the microcontroller. However, would it be ...
7
votes
1answer
15k views

ESP8266 & websockets

At the moment, I'm using various operating systems and devices like the Raspberry pi to control lights and other stuff over websockets. I use websockets since they added the support on Chrome. I write ...
13
votes
1answer
31k views

Arduino IDE #ifdef

I use my Arduino IDE to either upload my sketch to a Arduino or ATTiny or ATmega328. As you know each device can have a different pinout. Does the Arduino compiler support ifdef, depending on the ...
8
votes
3answers
6k views

Manchester Library Won't Compile for Attiny85

I am creating a wireless sensor using an Attiny85. I want to send the data to an arduino uno, so I purchased the 315mhz rf link kit from spark fun. Since the Attiny85 does not have a TX I decided to ...
2
votes
1answer
4k views

ESP8266 UDP multicast doesn't receive packets

I am currently working on an ESP8266 with the Arduino IDE. I try to implement an ESP8266 in STA mode as multicast receiver. I was writing my code with the help of this documentation. Especially the ...
15
votes
4answers
27k views

ESP8266, Arduino IDE vs Lua?

I'm planning to buy an ESP8266. Do I really need to learn Lua to play with it? I have seen some people using it with the standard Arduino IDE. Do you need a custom firmware to use the Arduino IDE ...
15
votes
2answers
5k views

Why does an `.ino` file have to be in a folder of the same name?

I'm trying to organise a very complicated project and I want to put all the actual code in a folder named src (source), but I want to keep the main .ino file as main.ino (it will also be in src). Then ...
7
votes
1answer
15k views

Split up Arduino code into multiple files using Arduino IDE

I am working on a very long code that requires multiple functions defined. I want to split the code into two files as main code ("Feeder_Control" in the screenshot) and functions ("connections" in the ...
6
votes
2answers
25k views

How do I change the Console colour of Arduino IDE?

Leading on from the question Can I change font Color and/or Type for IDE 1.5.6r2?, in 1.6.0, or 1.6.11 it does not seem to be possible to change console.color or console.error.color. To be precise, ...
5
votes
1answer
3k views

Basic C++ programming, how to pass constructor argument into class?

I'm having some programming problems. So here's what's happening: In my .ino file, I have a tft variable which holds the connection to a LCD. I want to make a class which can either automatically ...
4
votes
1answer
3k views

Built-in capacitive touch detection with SAMD21 development board (Arduino Zero Compatible)

I bought this SAMD21 development board which shows up as an "Arduino/Genuino Zero (Native USB Port)" when plugged in. And I've successfully got a blink sketch running on it all good so far: The ...
3
votes
1answer
4k views

Arduino with WS2812 using Adafruit NeoPixel library fade in/out different patterns

Hey all I have been trying to figure out a way to random set patterns for my fade in/ out code below: int PIN = 3; int totalLEDs = 11; int ledFadeTime = 5; Adafruit_NeoPixel strip = ...
2
votes
2answers
692 views

Unable to create a desired periodic signal with Arduino Mega 2560 and DAC0808

I wrote the code to produce the periodic signal by using arduino and DAC0808 where i turned on and off the respectively pins of PORTA by using a logic in iterative manner and created the periodic ...
2
votes
1answer
3k views

Arduino IDE on Fedora

I'm using Fedora_21_MATE.img on a Raspberry Pi. Installing the Arduino IDE 1.0.6 using these commands, taken from Arduino On Pi. Those instructions are for Raspbian, I assume, so changing for Fedora, ...
2
votes
1answer
13k views

Manual Arduino Due Installation

Not sure if this is the right place to post this. I have an Arduino Due I'd like to start using. I've been using Unos, Megas etc no problem. The newer IDEs have removed the Due support. I've been ...
1
vote
2answers
2k views

Software serial conflict with WiFi on ESP8266

I'm trying to use an ESP8266 (Wemos D1 mini) to read from a 19.2K serial port and report the results over WiFi. Programming is via Arduino IDE. The code to read the port works just fine if WiFi is not ...