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Questions tagged [sketch]

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

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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
662 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: ...
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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
1k 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 ...
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1answer
84 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, ...
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1answer
685 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
4k 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 ...
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1answer
158 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
23 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 ...
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2answers
167 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 ...
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2answers
101 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 ...
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1answer
320 views

Using two ultrasonic sensors together

Using two ultrasonic sensors together, how can I enable one before the other?
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5answers
876 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
810 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 ...
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1answer
1k 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 ...
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0answers
155 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. ...
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3answers
6k 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) ...
2
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2answers
2k views

Upload sketch via Bluetooth using HC-06 module

I'm dealing with an application in which I need to upload sketches remotely to an arduino UNO board. I successufully managed to upload sketches using an HC-06 bluetooth adapter. The only problem is ...
5
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2answers
7k views

How to generate true random numbers over Arduino Uno without any external hardware?

Using a 'random' function in sketch gives same pattern of numbers every-time. But, I need to generate different numbers such that any number to repeat itself should have a very less probability.
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2answers
376 views

Arduino Prototype on Breadboard: “avrdude: stk500_recv(): programmer is not responding” [duplicate]

I have created an arduino prototype using the exact instructions found on this page: https://www.arduino.cc/en/Main/Standalone However, when I plug in the micro USB power supply and try to upload a ...
1
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1answer
521 views

How to exclude a ino/pde file from Arduino projects

I would like to be able to exclude from the auto-including process of the current project (without renaming the extension or delete it) a sketch with pde or ino extension that is used in certain ...
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1answer
8k views

Problem: “stray '#' in program” [closed]

I got a sketch from the internet (http://www.instructables.com/id/How-to-build-an-8x8x8-LED-cube-and-control-it-with/) for controlling the display of an 8x8x8 LED cube. The program won't compile and ...
0
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1answer
83 views

Stuck on uploading sketch via USB 6 pin

I'm just got a Galileo Gen2 and wanted to try a simple blinking-led. The firmware have been updated to 1.0.4. My problem is whenever I try to upload the code I get this error: Sketch uses 83,775 ...
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1answer
534 views

String matching serial input (was Code for voice recognition for arduino uno) [duplicate]

#include <SoftwareSerial.h>// import the serial library SoftwareSerial Genotronex(10, 11); // RX, TX int ledpin=13; // led on D13 will show blink on / off int BluetoothData; // the data given ...
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2answers
1k views

how to count blinking LED flashes using arduino uno boards and LDR?

i want to know code for counting the flashes of LEDs and display no. of flashes in particular time given.by using LDR. basically i tried it with interrupts but i'm not getting it,so please help in ...
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1answer
82 views

questions about sketch [closed]

int k ; int q ; int f;//pot void setup() { pinMode(k, OUTPUT); pinMode(q, OUTPUT); pinMode(f, INPUT); } void loop() { zzf(); } void gf() { int a = f;//test the conditions of f and store in ...
3
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1answer
477 views

Double ## in macros

I was looking at some macro use in an Arduino code. I believe what this macro does is it expands into a state that basically sets a pin to either input or output, but I'm a little confused about ...
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2answers
3k views

Using Rx and Tx pins(0 and 1) on Arduino Uno for GSM

I am using a GSM module sim800. My module responds to the output given by my PIR sensor and sends sms according to it. My module has got +5V, GND, Rx and Tx pins. What are the pin connections that I ...
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2answers
422 views

Can an a Arduino make music or speech without a speaker?

I have an Arduino Leonardo that can turn a relay off and on and the click is audible on the relay -this is simply done by making one of the control wires HIGH in the program code to turn the relay on ...
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0answers
56 views

How does one build an arduino version of a slime controlled robot? [closed]

Recently robots controlled by the emotions of biological slime have been built. See for example the New scientist article titled robot move by fear of slime mould. The hard part of building an arduino ...
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1answer
569 views

Problem while writing sketch for GSM module sim800

I wanted to my GSM to recieve SMSs. I have written a sketch for it. But while verifying the sketch an error pops out in this part: if (sms.available()) { sms.remoteNumber(senderNnumber, 20); ...
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1answer
50 views

Detecting Motion behind a robot

I am building a motion following robot. It has two PIR sensors on the left and right. It has an ultrasonic sensor in the front. When either of the PIR sensors detect motion then it turns to that side. ...
1
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1answer
601 views

How to make two wheels turn only for a particular amount of time?

I am trying to make a robot turn (dc motors are being used) back 180 degrees. So I used an l289n for it and made one wheel turn clockwise and vice-versa. But as I wan't it to make only a 180 degrees ...
0
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1answer
4k views

What if Ultrasonic sensor doesn't detect object?

I am trying to write a sketch where a function will only be triggered when the ultrasound doesn't return back. Thus when the echo pin is checked after 1 second after the trigger pin was written high, ...
2
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4answers
1k views

Take an Arduino or Teensy prototype to Mass production - Loading software onto microcontroller

I am developing an educational product that I would like to mass produce. I am not sure of the quantity yet, but I imagine we will make a few hundred PCBs at least to begin I spoke with an electrical ...
0
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1answer
213 views

Details on OV7670

I am thinking of working on a project based on a camera module OV7670. I am making a security system using an arduino where detected motion (I am also using a PIR sensor) will trigger the camera ...
0
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1answer
205 views

How to upload Arduino sketches to Atmel chips

I am new in this Arduino coding world and I was trying to make a project. I normally used Arduino Unos all the time, but I was facing a problem and that is that the Arduino Uno has only 13 digital ...
0
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1answer
432 views

Arduino compiler uploading last saved version of sketch, not current

Is this an issue or a defined behavior? I am using Arduino IDE 1.6.6 Sometimes I made changes in code, and immediately upload them to the Arduino board. And many times issues already fixed are ...
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2answers
1k views

uint8_t etc as color variable

I am very new to coding and I am attempting to teach myself the best I can. I have no prior knowledge of coding and am filling in the blanks via YouTube and forums alike. One place I keep getting ...
0
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2answers
3k views

Clearing SRAM in loop()

Very broad question here. I don't know exactly what the problem is but I'll edit this post as we narrow down the possibilities. I think I'm running into memory constraints. I'm running a sketch ...
0
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1answer
300 views

How to extract the last byte out of an IP adress

Newbie question: I need to pass the last byte of a local IP as a parameter. Eg.: when Ethernet.localIP() returns 192.168.0.100, I need to extract the 100 and put it in a char array or string. Anyone ...
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4answers
21k views

What is better: one sprintf() or multiple strcat() and itoa()?

I was creating Arduino function which sends two int and additional chars between them and at the beginning and end of char array - then print that array to the serial port in almost real time. (For ...
3
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1answer
862 views

What is the Arduino Uno default sketch?

When I bought my Arduino Uno and connected it to my computer, I tried to make the simple blink circuit (before programming the Arduino) and suddenly the LED started blinking. Is the blink example the ...
1
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1answer
227 views

Arduino sketch does not repeat

I have a Problem with my code. My Goal is to receive a Ethernet message via UDP and send the message back via CAN. It works fine but only with the first packet I send. When I send the same packet ...
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2answers
937 views

Python script to toggle LED's

I have 8 LED's connected to a shift register on my arduino uno r3. I am trying to write a Python3 script that will prompt a user to select one of the LED's and then prompt to toggle on or off. Should ...
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1answer
3k views

Graph plotting on Processing from Arduino sensor data

I am trying to plot a graph on processing but I'm having challenges going about it. The processing sketch below does work for plotting only one axis, and I'm trying to plot all three axis on the same ...
0
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1answer
79 views

Broken Score on Game Sketch

I have modified the code for Flappy Duino to give me a score at the end of the game. Here is the code: #include <SPI.h> #include <Adafruit_GFX.h> #include <Adafruit_PCD8544.h> ...
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3answers
546 views

TMP36 probe reading 0 on analog

I've designed this system which is supposed to turn on the LEDs when the temperature of a particular probe exceeds 32 degrees. From what I can tell, this should be functional but the analog sensor is ...
0
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2answers
448 views

Sending data from Arduino to the server where arduino (sketch) acts as a client

I want to make simple client-server program where arduino behave as a client. For example I have a LED connected in arduino board that is controlled by a switch. With the switch I can turn off and on ...
0
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1answer
392 views

Sketch upload freezes during write

I'm trying to upload a huge sketch to my Uno R2. It's compiling just fine but it fails to upload at 94% of writing to flash... The program is so large because of a big array of data in a separate .h ...