Questions tagged [sketch]

A sketch is compiled code that is uploaded to an Arduino board.

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736 views

Any good way to inverse a function? [closed]

I'm guessing that the answer to this is "no," but I'm curious if there is any way to save writing some code by specifying a function to do the opposite of whatever another function does. For example ...
0
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1answer
4k views

Is it any way to connect ESP8266 to wifi faster?

I'm uploading this sketch to try connecting ESP to internet. However, most of the times I've ran it it takes a very long time to connect, a lot of times I've had to break the process because it seems ...
2
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1answer
169 views

Arduino Simon Says with Midi Controller

I altered code for the Simple Simon says to work with a Midi controller instead of push buttons. i am having trouble with the input of the song sequence with the Midi Controller. during the time where ...
1
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2answers
69 views

When a pushbutton and sensor are in a certain state, do something for a certain period of time (15 seconds)

I have a sketch that contains code for an analog input (FSR sensor), a pushbutton, and 6 blinking LEDs. Currently, the sketch is written to allow the LEDs to blink only when the button is pressed and ...
1
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3answers
6k views

Implement Visible Light communication using Arduino

I want to implement a simple VLC based communication system using two Arduinos and send messages/data/files between two PCs. For that I have a simple transmitter circuit with an LED on Tx side and a ...
2
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1answer
6k views

how to send argument to ESP8266WebServer objects on function

this probably simple thing to do however I can't think of a way to pass argument to function call ESP8266WebServer server ( 80 ); void toggleRelayOne() { char temp[400]; String msg = ""; if (...
1
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1answer
488 views

Arduino eeprom_put sketch writes data in two locations?

Using precisely this code - the eeprom_put example in the Arduino IDE, and am seeing some strange results... The sketch does write correctly to eeAddress = 0, and the corresponding eeprom_get sketch ...
0
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1answer
78 views

3D printer Arduino sketch

I'm building an automatic warehouse system using 3 nema17 stepper motor. My problem is to move the motors with precision, since I do not have any kind of encoder on the motor and so I cannot know the ...
2
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0answers
65 views

Issue regarding executing sketch code when not connected to USB

`I have an Arduino Uno A000066 Board R3 that has an Arduino A000079 Motor Shield Rev3 attached to it. Also I have connected two DC Servo Motors to the Motor Shield and wrote the following sequence: ...
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3answers
862 views

How can I use my Arduino sketches on my Raspberry Pi IDE?

I have installed the Arduino IDE 2:1.0.5 on my Raspberry Pi3 under Raspbian and am using a cobbler breakout which provides a nice breadboard. On that breadboard I have installed an Arduino Nano to do ...
1
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1answer
1k views

'MeDCMotor' does not name a type error inside mBlock

I was using a 3rd party programming enviroment, mBlock 3.4.5 for making C++ Arduino programmes with a graphical programming language. I was compiling a program and the following eroor came up. ...
2
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4answers
187 views

Is there a way to keep a program on the Arduino after uploading new sketches?

I am looking for a way to keep a program on my Arduino Nano 3.0, after uploading new sketches on it. I would like to have a program on it that will control th screen and buttons at it. The user will ...
0
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3answers
1k views

What is the best board for setting up an SSH protocol to an Arduino?

I currently have a project using an Arduino R3, set up across the room from my computer. This has become quite annoying, as every time I want to push something to the Arduino I have to get up and move ...
1
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2answers
2k views

How to run background music while the code for a game is executed

I have some background music. If I put it at the top of the void loop(), it'll first play the music and then execute the game code afterwards. How do I have the code run while the background music ...
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2answers
90 views

Building a low voltage disconnect w/ timer - need help with the timer

I'm trying to build almost exactly this device: http://www.reuk.co.uk/wordpress/reuk-shop-low-voltage-disconnects-lvd/buy-reuk-programmable-low-voltage-disconnect-with-display/ It is a low voltage ...
0
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1answer
288 views

Typedef Function Pointer Invoking Issue

I'm having an issue trying to use a normal non-member function of my main sketch file as a callback. I can't get the function pointer to invoke from a function other than it was saved. More info ...
1
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1answer
86 views

Is there a way to “list” (in BASIC, or “cat” in LINUX) the current sketch loaded in my xxxDUINO? [duplicate]

I was surprised when I couldn't find an old post where someone asked this question. Seems like a natural beginner, uh excuse me, "newbie" question, but then I'm a throw-back to the days when a home ...
0
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2answers
108 views

What does the following code in Morse Code Arduino mean?

struct node *root, *currentNode; root = (struct node*)malloc(sizeof(struct node)); root->value = '\0'; root->next = 0; currentNode = root;
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4answers
1k views

Digital Reading from a array without using the exact element

Is it possible to read a digital input from an array without using the exact element? Such as while(digitalRead(myButtonArray[i])) digitalWrite(myLEDArray[i], HIGH); Reading the ...
0
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2answers
7k views

Keypad number input and store

i'm stuck with a little problem. I need to create a program that can store a number via keypad (this number will be chosen by the user) and then do something with it. To be more specific i will create ...
2
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1answer
303 views

How to execute commands on Arduino (via PC) without touching the current sketch?

I am working on my first Arduino project. It's a Reverse Geocache. Basically, it's a puzzle where a battery-powered Arduino is mounted inside a locked box, and is able to unlock the box if the user ...
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2answers
601 views

How to insert into table in database after every 5 minutes using Real time clock module

I have RTC module attached to arduino mega, to calculate time difference of minutes I am getting minute from the RTC module and checking if passed time is greater than 5 minutes then insert to ...
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2answers
376 views

What do I do about a compiler error “ variable 'font' must be const”

I am trying to run the test program from Adafruit, with their libraries, for an Arduino controlling a Nokia5110 display and get this error message: Arduino: 1.5.8 (Linux), Board: "Arduino Pro or Pro ...
0
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1answer
2k views

Using MMA8451 accelerometer to count steps [duplicate]

I'm trying to use an Adafruit MMA8451 accelerometer to create a pedometer-type device that counts steps. I'd like to initiate a counter that says "if the x-axis readout is > some threshold, add 1 to ...
3
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2answers
1k views

What programming practices should be adopted while coding sketches for Arduino?

What are some of the best programming practices that can be adopted while coding sketches for Arduino, so that it uses the least memory and performance should not suffer from memory outage, and still ...
5
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2answers
61k 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 ...
0
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1answer
423 views

How to extend my Sketch for Multiple Inputs and Outputs

I am using 4 Push Buttons and 4 leds in my project. Here the sketch is only for one push button and one Led. I want extend my sketch upto 4 push buttons and 4 leds .Please tell what changes I make in ...
0
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1answer
1k views

The Arduino Sketch does not save in Arduino folder location

I have just installed Arduino on Mac OS. The Arduino folder is created under Documents. But whenever I save the sketch it gets stored in some ghost location and gives an error, the same name already ...
0
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1answer
2k views

Trying to get my mega 2560 to work for my 3d printer

Trying to pit marlins v2non this board and it gives me an error and I have no idea what to do Arduino: 1.6.10 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)" Sketch ...
3
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2answers
3k views

How can the Arduino check if it is connected to a PC and the PC is on?

I have been searching around the Internet to find if there is a way to check whether an Arduino is connected to a PC or not. For example: if my PC is turned on, the Arduino will listen to any serial ...
0
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1answer
112 views

How do I convert a program made on Notepad to my Arduino on Proteus

I had the Arduino IDE but I accidentally deleted it. I have no internet connection, so I could not download it again. I do not currently possess the Arduino hardware itself but I do have Proteus and ...
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2answers
236 views

Delay In receiving data when SoftPWMBegin(); is used from SoftPWM.h library

when i use SoftPWMBegin() function in setup there is some delay while receiving data over bluetooth. And if i pressed o and 1 fastly (see in below given code), some time it receives data and sometime ...
1
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1answer
754 views

Arduino programming through HC06

My goal is not upload sketch to Arduino Pro mini through bluetooth module HC06. I have made a breadboard version of DTR signal simulator which takes LED status pin as a source. The output from the ...
0
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1answer
2k views

Reading an MCP23S17 I/O expander port with the Arduino SPI library

I am trying to read an MCP23S17 I/O expander port B with the Arduino SPI library. The following example is simple as possible, and I still can not get it to work. The setup is an MCP23S17 I/O ...
2
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1answer
807 views

Strobe Frequency Calculation, how its done?

I'm using the Arduino sketch for LED stroboscope found here: http://mehax.blogspot.co.uk/2011/02/arduino-stroboscope.html. Also below, I've inserted the loop part where this calculations are made: ...
0
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1answer
2k views

How to split a string into substring Arduino

I'm about identify myself stupid, howcome I couldn' t figure out how to split a string into substring using arduino, even after 10 days of searching. The number is fact... So, As Mr.Arduino.cc says: ...
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3answers
2k views

Why does HC-SR04 return 0s in this sketch

I am building a robot with multiple sensors, abilities etc. Since I had a bug with a HC-SR04 rotated by a servo, I experimented in a different sketch. If the distance is less than 30cm, the servo ...
1
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1answer
98 views

HUGE deviation in Sharp IR sensor values if other pins are defined in void setup()

I wrote this code for a project - int sensorpin = A5; int val = 0; double avgval = 0; int E1 = 11; int brake = 12; char data = ' '; void setup() { Serial.begin(115200); pinMode(E1, ...
-1
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1answer
863 views

Arduino UNO suddenly stops responding

I wrote this simple script to control a servo over serial comm - #include <Servo.h> Servo steeringServo; char data = ' '; void setup() { steeringServo.attach(9); Serial.begin(115200); } ...
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1answer
5k views

how to send large strings (> 100 characters) from arduino serial monitor

I am a newbie to arduino programming. I wish to send big strings which are in range of 100 to 1000 characters to my arduino uno. I saw that arduino cannot read more than 63 characters at a time. The ...
0
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1answer
166 views

Does serial communication between PC and Arduino has to be in a loop?

I am trying to send a few variables from my python script to my Arduino. I am using pySerial. I am able to send the variables to the Arduino, but my Arduino sketch runs only for a second and then ...
0
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1answer
25 views

Sketch not running as expected

I wrote this sketch along with an HC - SR 04 Ultrasonic transducer and a DC motor. Whenever the HC-SR 04 reads any distance less than 15 cm, the motor stops, otherwise it keeps running. The problem ...
-1
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2answers
171 views

Ughh… My Arduino Code ain't workin'… And i just couldn't see any problems… Any thoughts?

There's Latest Update! So i'm workin' on a counter just for fun. How it works is when you press BUTTON1 the LED Lights up red, the buzzer beeps and the variable "counter" adds one to itself; After ...
1
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2answers
118 views

Can you pass params to an arduino sketch?

I was wondering if there is a way to pass parameters to an arduino sketch at the upload step. Edit: The reason this would be helpful is because I have a bunch of esp8266 units that need to have ...
0
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1answer
339 views

Using two ultrasonic sensors together

Using two ultrasonic sensors together, how can I enable one before the other?
3
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7answers
2k views

Include Git tag (or SVN revision) in Arduino sketch?

Is there any way to get the current Git tag/commit identifier into an Arduino sketch binary? For normal desktop program development, you can pull some tricks with the Makefile (as pointed out in this ...
0
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1answer
976 views

Controlling HC-05 from a sketch

Hi I am making a sketch and circuit with a HC-05 BT receiver to upload sketches via Bluetooth to my Uno. This requires giving AT commands from the sketch. I would like to see the response from the ...
0
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1answer
2k views

Arduino OOP and [this] keyword

Lets say I have a sketch called mysketch.ino with these contents: String globalString = "ThisisGlobal"; void setup(){} void loop(){} How can I pass THIS sketch mysketch.ino as an object or its ...
1
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0answers
163 views

Running script file/programe on Intel Galileo gen2 [closed]

How do I run a script file/programs like C / python / shell script in an Arduino IDE like how We use System(); Commands like grep, cut, cat works fine but running System("python file.py"); doesn't. ...
0
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4answers
8k views

While loop not breaking

I'm trying to build a circuit that buzzes until a button is pressed, or it buzzes 5 times: void alarm() { int AlarmState = 0; //Just to get while loop going int count = 1; while(AlarmState==0) ...