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Questions tagged [sketch]

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

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2 answers
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Which sketch was this?

With ESP32 being so plentiful here (3 more for Christmas) I am at a loss to determine which sketch I used for a particular unit. Has anyone devised a record keeping scheme or even a serial monitor ...
jansellsbond's user avatar
1 vote
0 answers
300 views

display.begin(); function breaks working code

I've been setting up a system using an Arduino Uno board that reads from both an Adafruit MPU6050 6-way gyroscope and accelerometer and an Adafruit NAU7802 connected to a load sensor. I have code for ...
HannahPlaysCello's user avatar
0 votes
1 answer
196 views

if statement does not work with fraction, but works with decimal equivalent

I'm trying to trouble shoot a problem with my code and narrowed it down to my if statement not working with a fraction. The below code does not work and returns 0 for(float i=0; i <= 1; i += .0001){...
LB Burkhardt's user avatar
1 vote
1 answer
274 views

DHT11 temperature and humidity sensor Code

I’ve got a question about this code I’ve attached please- would it be correct to read it like this: After defining the variable temperature and humidity and assigning measurement_timestamp to millis(),...
Tom's user avatar
  • 13
1 vote
2 answers
110 views

Stoplight Simulator - White LED not turning on with button press [closed]

I am working on a relatively simple stoplight simulator that uses four LEDs - red, green, yellow, and white - in addition to a button. The 3 colored stoplight LEDs cycle as a real stoplight would. If ...
Weston K.'s user avatar
-1 votes
1 answer
111 views

How to write a program to do 2 different loop | Task?

I wanna write a program for rc-plane navigation The plane must navigate to 2 waypoints waypoint_1 & waypoint_2 When it reaches to waypoint_1 (with miss-distance =< 5) then navigate to ...
Curious guy's user avatar
2 votes
2 answers
271 views

How to unload a sketch

I've loaded a sketch onto Arduino using the Ardunio IDE and it works but when I press the reset button I realize it doesn't remove the program. Is there a way to unload the program? Why? Because when ...
1.21 gigawatts's user avatar
0 votes
1 answer
176 views

How to get started with writing code for a Hall Effect sensor?

One of my biggest questions concerns coding a Hall effect sensor to find wheel speed with an arduino mega. I’ve got an lcd in digital pins(7,8,9,10,11,12) and a Hall effect sensor in digital pin 2. I ...
Aarav Shah's user avatar
1 vote
1 answer
208 views

How to change variable/sketch through a GUI

Over the past few months, I've been working on a wearable computer mouse using an Arduino and a 9-dof sensor. Most of the sketch is complete, and works as expected. Recently, I started investigating ...
Zhelyazko Grudov's user avatar
1 vote
2 answers
220 views

Two servos for robot (head & chest) movement at different speeds at once

I have an Arduino Uno and two Hi-tec servos (HS-40 & 5055 digital) that I'm using for a basic robot build. I'm trying to have one servo(HS-40) turn the head back and forth (left to right) slightly ...
John Conner's user avatar
1 vote
0 answers
25 views

I have 2 sketches with same RTC DS1307 but when I combine the 2 sketches it gives errors [duplicate]

I have 2 sketches one is pixel clock with RTC ds 1307 and the other is 7 Segment with DHT 11, I want to merge the two into one but it is giving errors for rtc. sketch for pixel clock #include <Wire....
prasanta pal's user avatar
1 vote
0 answers
48 views

Why does the LED state behave differently?

I wanted the sensor to be high when I press the button, but when DigitalRead does low, the LED turns on, when it does high, the LED goes off. Whereas when the digitalRead is high, isn't it supposed to ...
Sabri73's user avatar
  • 51
1 vote
0 answers
233 views

Http Client requests

I am working on a project where the ESP 8266 sends a very long string about 3000 chas over http as client. Likewise sensor data are determined. The loop repeats itself every 250ms. Now I noticed that ...
TrompetenTom's user avatar
1 vote
0 answers
113 views

Aurdino EMG sensors and servos?

I'm new here and to the aurdino. I'm building a 3D printed robotic arm controlled by a EMG sensor. I purchased a V3 EMG board and leads on Aliexpress. Here's a list of the things I've purchase for ...
Jonny3777 's user avatar
5 votes
3 answers
2k views

Using Arduino as a standalone compiler

I mostly program in C/C++ so I conviniently have a GCC compiler for all my compilations. I was wondering if there is a special compiler for Arduino that can be used just like the GCC Compiler? Because ...
Supragy Mishra's user avatar
-1 votes
1 answer
2k views

Standard deviation and variance of an array of numbers

Looking for a simple way to get the variance of an array of numbers, that will compile with the Arduino compiler. Something like this c#: static float variance(double []a, int n) { // Compute mean ...
Eric V's user avatar
  • 55
1 vote
1 answer
148 views

I want to create 10 levels with one button but this code shows only level 1?

#include <Adafruit_NeoPixel.h> const int PIN = 4; const int NUMPIXELS = 10; const int BUTTONPIN = 6; int buttonState = 0; int PINState = 0; int level = 1; int dt = 100; Adafruit_NeoPixel pixels(...
louise moons's user avatar
4 votes
2 answers
2k views

Can Arduino Sketch be used for production

There are lot of device support with the help of Boards Manager today and is on going in Arduino IDE. So I am curious to know about can one use those for production purpose. Or it is recommended for ...
Next-93's user avatar
  • 63
2 votes
1 answer
45 views

Leds become dimmer after they reach a certain brightness, why?

Even if I don't use buttons and I do an automated thing that makes the led brighter(Even the non-rgb one)after sometime it resets itself to a dimmer light, why?* int Gled = 5; int Bled = 6; int Rv; ...
David's user avatar
  • 23
2 votes
2 answers
2k views

Can't Upload Sketches to Arduino Nano Every

first-time builder here. I just got my Arduino Nano Every in the mail from Mouser, and I'm trying to upload a modified version of the blink example to my new brand-new board. However, every time I ...
Kronimiciad's user avatar
2 votes
1 answer
395 views

Branchless programing on arduino?

So I've been looking into branchless programming to speed up code and I'm curious as to how exactly Arduino (or rather atmega328) actually reads machine instructions. Does it have a memory cache or ...
Beacon of Wierd's user avatar
0 votes
1 answer
2k views

Program Nano Every using UPDI port

I have and Arduino Nano and an Arduino Nano Every. I'm doing some experiments and trying to program the Nano Every from the Nano, using the UPDI port. I'm using tutorials like this one that does the ...
Miguel's user avatar
  • 209
0 votes
1 answer
2k views

nRF24L01 - Measuring distance using time elapsed

For school usage, my team and I are working on a wristband that will alert the user if they are too close to another wristband (for social distancing). The problem is measuring distance using radio ...
Hari5000's user avatar
  • 125
0 votes
1 answer
1k views

Cannot send any UDP packets from ESP8266 Wemos D1

I am attempting to send sensor data from a battery-powered device using UDP. The goal is to send a datagram immediately after the wifi station awakes from sleep then immediately go back to sleep after ...
rubyuser1357796's user avatar
1 vote
0 answers
224 views

How do i efficiently write this code for PS2 controller to USB convertion sketch for Arduino Pro Micro?

I am really new to coding and building stuff, so forgive me if it is anything offensive.i have been trying to convert my PS2 dualshock controller to USB using arduino. there is a library called ps2x ...
Hackermann's user avatar
-2 votes
2 answers
241 views

Use an LDR to run a sketch

This may sound like a simple question but I have tried to find the right solution but all I find is the usual make an led blink and even I can code that nugget I am quite new to programming arduino ...
Dave C's user avatar
  • 1
1 vote
1 answer
62 views

Ardiuno DUE board. Sketch uploading Error

I am working on Arduino UDE board in Ubuntu 18.04. I've followed following link tutorial. https://www.arduino.cc/en/Guide/ArduinoDue#:~:text=Use%20your%20Arduino%20Due%20on%20the%20Arduino%20Desktop%...
Pratik Parwatwar's user avatar
1 vote
1 answer
873 views

Master Reader/Slave Sender with Distance Sensor

I am currently working on a project and want to transmit the information from a distance sensor from one arduino the another, but what i receive in the master board are not the correct measurements. ...
George R.'s user avatar
1 vote
2 answers
192 views

Bike Gear Indicator Coding Problem

Lack of practice I forgot many function of C & C++... Can anyone help me with this coding Please... I think this is The Main coding: Topic: Gear indicator I first found this, Gear_Indicator_Raw ...
BLUE's user avatar
  • 35
0 votes
1 answer
2k views

Getting error invalid conversion from 'const char*' to 'const uint8_t*

I have written this sketch, and I am trying to populate the array of wifi hotspots to set the value in html select using javascript dynamically. #include <Arduino.h> #include <Hash.h> #...
Ciasto piekarz's user avatar
1 vote
2 answers
106 views

Runtime compilation

I want to compile a sketch on Arduino Uno, while Arduino is running and not connected to anything else, and then run the compiled sketch automatically. Is this feasible? How?
user65440's user avatar
0 votes
1 answer
365 views

Controllino Mega and Fatek HMI

I have a setup that controls the rotation of two stepper motor using Arduino UNO, HBS860H stepper drivers, 4X4 keypad and LCD screen. I have replaced the Arduino Uno by a Controllino Mega and it works ...
Merkhav's user avatar
  • 31
1 vote
1 answer
72 views

Update class attribute with attachInterrupt

I want to refactor this code /* YF‐ S201 Water Flow Sensor Water Flow Sensor output processed to read in litres/hour Adaptation Courtesy: www.hobbytronics.co.uk */ volatile int flow_frequency; // ...
Valanthor's user avatar
0 votes
1 answer
817 views

Im having another problem with my code the error is "redefinition of 'AF_DCMotor motor'? [duplicate]

Heres the code #include <AFMotor.h> AF_DCMotor motor(1, MOTOR12_8KHZ); AF_DCMotor motor(2, MOTOR12_8KHZ); AF_DCMotor motor(3, MOTOR34_1KHZ); void setup() { Serial.begin(9600); Serial....
Tommy's user avatar
  • 13
1 vote
2 answers
1k views

serial is print twice?

I have a problem , when send 1 or 0 by Bluetooth module the serial monitor print two time (RECEIVED SMS) . what's the wrong ? This is my code : char BluetoothData = 0 ; void setup() { // ...
Khalid Abu-Khadija's user avatar
0 votes
2 answers
568 views

Check if the board is in sleep mode

I'm using seep sleep mode with UNO with a simple sketch that turning on an LED and then goes to sleep. as far as the ATmega328p datasheet in sleep mode part showing the wake up sources and deactivated ...
sepehr's user avatar
  • 63
1 vote
0 answers
96 views

Arduino Sketch Crashes in working procedure when adding extra call

I am trying to drive a couple of motors to make a car. I successfully wrote some code then tidied it up to procedurise it and it just kept crashing. I've put some debug code in and narrowed it down a ...
neillysane's user avatar
1 vote
1 answer
111 views

Help, I want to turn relay constantly on until a difference is detected, but triggered only one instead

Help, I want to use arduino to control relay for electricity, i get data from a sensor and when a value is detected it should be constantly on until another detection triggered again, i can get the ...
Reza Jawas's user avatar
2 votes
0 answers
176 views

Arduino uno wifi rev2 error compiling sketch to board [duplicate]

I'm having an irritating situation with my Arduino Uno wifi rev2 board. I made an installation with an LCD, keypad and little servo motor. I first wrote the code for my regular Arduino Uno and ...
imkeVr's user avatar
  • 161
0 votes
1 answer
321 views

How should I customize UIPEthernet constants?

I am using UIPEthernet to get an Arduino Nano to drive an ENC28J60 Ethernet Shield for a UDP-based application. I'm customizing a number of its #define parameters to change default settings to save ...
SusanW's user avatar
  • 172
0 votes
2 answers
136 views

NeoMatrix Button Troubles

I am creating a 20x15 LED Matrix using and Arduino Nano. My goal is to switch between different "scenes," if you will, using 4 buttons (I just need to run different code to make it display something ...
Micah Wagoner's user avatar
1 vote
2 answers
278 views

How can I upload a sketch remotely from a distant location onto an arduino that is power by a battery

Of course after developing a success full embedded product the next step would be making upgrades to compete favorably with new products in the market. Well making upgrades would require making ...
Sigma's user avatar
  • 39
1 vote
1 answer
132 views

Why doesn't data return when I use Sim808 http request

Why is it that when i use this code for http request on DFRobot_sim808 , I get 'fetch over' message, that means that no data is being returned? char strings: char http_cmd[] = " HTTP/1.0\r\n" ...
Pooya Behravesh's user avatar
1 vote
3 answers
295 views

Arduino Nano - Strange problems

Update: The arduino works only when I connect 3.3v to reset pin. And I successfully uploaded a sketch but it stops when I disconnect 3.3v and reset. Update 2: -- Removed -- Update 3: Its working ...
Nouman's user avatar
  • 217
-1 votes
1 answer
706 views

Is low memory warning based on a fixed number of on the actual sketch?

I have the following output of my sketch for the Arduino Mega so far: Sketch uses 25020 bytes (9%) of program storage space. Maximum is 253952 bytes. Global variables use 6919 bytes (84%) of dynamic ...
Michel Keijzers's user avatar
0 votes
2 answers
77 views

Why does this take more byte?

I am only replacing a portion of my code where I want to use the first method but as you can see it is making my sketch size little bigger //if(iBPM >= 40 || iBPM <= 170 ) { char ...
Noajm IsMy Name's user avatar
1 vote
1 answer
218 views

Please help me combine the two codes for DHT11 and SW-420 Vibration sensor for arduino in one program [duplicate]

The following is the code used for DHT11 Temperature and Humidity sensor: #include <LiquidCrystal.h> LiquidCrystal lcd(4, 5, 0, 1, 2, 3); byte degree_symbol[8] = { ...
paarth johri's user avatar
1 vote
1 answer
1k views

How to program the nodeMCU through OTA using GPRS?

I'm using a NodeMCU in one of my projects. The setup is in a remote location. That place doesn't have WiFi so I'm using GPRS (GSM SIM800V) for sensor data collection to my server. Right now I need to ...
Pitchai Muthu's user avatar
1 vote
2 answers
527 views

What is wrong with my code? RGB potentiometer

Arduino programming has been a huge learning curve for me and I am trying to create a project with an rgb that's color is determined by a potentiometer. To where the further I turn it, the further ...
Harrison's user avatar
0 votes
1 answer
107 views

Help with coding Arduino Nano to run fan through slide switch at specific intervals

I’m trying to use Arduino Nano to run my 5 V PC fan, which, I know it sounds crazy, it’ll be mounted on a piece of Tupperware that’ll control the airflow through it via the fan. However I have no ...
Amin Al Ashqar's user avatar

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