Questions tagged [arduino]

Arduino is an open-source electronics prototyping platform.

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Function block diagram code in CPP to program Arduino

I have created a processing program (Java) with which a programmer can use a GUI to make a program for an Arduino using logic function blocks. It looks like this: Ofcourse it still needs some work. I ...
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3 votes
0 answers
43 views

Arduino portenta H7 compatible message encryption and decryption

I am looking to build a message encryption/decription method that would allow messages to be encrypted in a timely fashion on board an Arduino Portenta H7, using as much of the onboard hardware ...
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2 votes
2 answers
115 views

State-machine class based upon arduino toolchain

In my quest to search or develop the 'perfect' state machine I have built the following class. With the class you can make a state machine object which comes with timing and transition methods. Being ...
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4 votes
1 answer
236 views

Gear Shift Indicator using Hall Effect Sensors & 8x8 LED Display

I wired up a Gear Shift Indicator for my dad's car to display what gear it is currently in, and showing changes with animations (sliding up and down as appropriate, with a few bonus ones for fun at ...
6 votes
4 answers
317 views

Interactive shell for Arduino

Goal I needed to interact with microcontrollers (ESP8266 & ESP32) via the Serial interface, so I wrote a small interactive shell with the command pattern. The defined commands can either accept no ...
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1 vote
1 answer
68 views

Arduino algorithm

I have 3 push buttons, 3 leds, and 2 relays. When you push button1 once, the led1 turns on and timer is set to 10 sec. When push button1 twice, led2 turns on and timer is set to 20 sec. When push ...
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4 votes
1 answer
63 views

Arduino Code for Juggling Machine (Stepper Motors)

I have built a machine that juggles. An Arduino sends signals to stepper motor drivers that drive NEMA 23 size stepper motors. Video of the machine: https://youtu.be/-9zD_8erkck Currently, each arm ...
0 votes
4 answers
161 views

Faster map function

For my job I was tasked with writing a faster version of Arduino's map. The requirements were only use addition and subtraction, since these are cheap operations on our board. For reference, here is ...
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3 votes
2 answers
94 views

Arduino code and PING))) ultrasonic rangefinder

Context I've started digging into Arduino and different type of sensors which is fun, but I'm worried that that my coding is too explicit. I've lots of experience for coding corporate programs, though ...
1 vote
1 answer
53 views

Calling a function once a threshold is met

I'm currently writing an API for our codebase that allows us to use an Arduino Leonardo for our tests. This code is uploaded to the Arduino, and we read through the analog for work. As stated in the ...
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4 votes
0 answers
499 views

Arduino-based darkroom timer

Description I have created a darkroom timer, which is used for enlarging and developing film. It has four separate timers, and can toggle mains via a relay to turn on the enlarger for a specified ...
4 votes
0 answers
68 views

Control 30 LED NeoPixel clock with IR color and brightness changing

This code is designed for my 30 LED NeoPixel clock, the reason for not using the ds3231 library is due to the fact that I use codebender to download programs to my Arduino, I wanted some critique on ...
3 votes
0 answers
42 views

esp8266 code for correctness of reset and overall performance [closed]

Please review my code for the performance and correctness, everything works and we get visible wifi access points by opening http://esp8266_ip_addres/hotspots ...
3 votes
1 answer
565 views

Arduino code for multi button state change detection

I created state change detection for multiple buttons, which is intended to run on my Arduino for a touchpad project. In a nutshell, the code makes sure that the Arduino only reacts to button presses ...
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2 votes
2 answers
383 views

Reading and Storing Integer from Serial Monitor

Description I wanted to understand how integers can be written and stored inside variables without the use of Serial.parseInt(). I couldn't find any code examples about this. Perhaps this is the ...
2 votes
1 answer
178 views

Arduino Conways Game of Life using FastLED

So I attempted to write Conway's game of life on an Arduino and display using the FastLED library. I use a custom bitset class to manage the game board state. I'm looking for feedback on performance, ...
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1 vote
1 answer
99 views

Traffic Light which revolves around Serial Communication

Assignment description This is the improved code for a question I've posted earlier. I'd like to receive feedback on an assignment which I'm currently working on. I have to make two traffic lights ...
2 votes
1 answer
132 views

Feedback on Traffic Light which revolves around Serial Communication

Assignment description I'd like to receive feedback on an assignment which I'm currently working on. I have to make two traffic lights which allow traffic to run smoothly. I'm using a master Arduino ...
-1 votes
1 answer
248 views

Interlock of some equipments in electrical power system using simple Arduino Uno code [closed]

I'm trying to implement some logic functions essential to control a small power system consisting of 2 Transformers labeled T1 and T2, 2 Generators (G1 and G2) and a bus tie (BT). I'm not going to ...
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9 votes
1 answer
609 views

Arduino Code for Talking to an RFID Reader

I've written some C++ code, intended to run on an Arduino, the purpose of which is to talk to SparkFun's Simultaneous RFID Reader. The current situation: The code runs fine, most of the time. ...
4 votes
1 answer
67 views

This program reads from serial port, Saves this to a text file, increments file name each time it is run

I want to condense it and get rid of any noob programming errors. The code works fine but I know it's not as elegant as it could be and I really want to improve. Your advice would be brilliant! I've ...
-1 votes
1 answer
73 views

How do I re-write 3 for loops into one function [closed]

I am building a color sorting machine using a Arduino uno and a TCS3200 color sensor. I have a code that is working perfectly fine however I feel like the code could be a bit more clean seeing that I ...
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4 votes
2 answers
83 views

Arduino project to indicate soil moisture using LEDs

I've recently started going through the Head First C book. I'd like to get up to speed in terms of writing good, idiomatic, modern C. I have read the first few chapters of the Modern C book too but ...
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1 vote
1 answer
99 views

Python's eval command in Arduino

I have made an equivalent of Python's "eval" command in Arduino (which in itself is quite a feat) but the part that decodes the output of it is not small enough to fit in another 30 functions since ...
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1 vote
0 answers
356 views

Arduino code to control motor speed based on MPU-6050 sensor

I have been trying to create arduino code where my MPU6050 reads its angle and based on that angle, change the motor speed. For example, 45° is the max motor speed, 22° is roughly half speed, and so ...
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1 vote
1 answer
44 views

Arduino Adafruit Motor Shield v2 wrapper for parsing text into commands

This wrapper library parses text into commands for the Adafruit Motor Shield v2 using the Regexp library. Currently, only the DC motor functions setSpeed and ...
4 votes
1 answer
236 views

Vertical "moving" text on a LCD-display

Following idea: You have a LCD-display with 2 rows. You write the first line of a "text" to the second row. Then you clean the screen. After a delay you write the first line to ...
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-1 votes
1 answer
67 views

An interface for designing Arduino code [closed]

Writing code could be divided into three parts. 1.Interface structure At this stage programmer should describe all the devices used in his project. Of course, only those of them which Arduino ...
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3 votes
1 answer
162 views

Arduino: Change the color & color intensity of a LED periodically

Prerequisites: A RGB-LED is attached and wired to the Arduino Uno-board. Process description: In the beginning the LED is turned off. A loop starts and an output-signal is put on the red-part of ...
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4 votes
1 answer
53 views

Average readouts from multiple IR sensors with Arduino

I've written an Arduino sketch to continuously read values from multiple analog IR distance sensors, average the last 7 values and output in millimeters. Being pretty new to both Arduino and embedded ...
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5 votes
2 answers
254 views

Read an image with ADNS2610 optical sensor and Arduino Uno

Preliminaries I have optical sensor ADNS2610 (see datasheet here). There are a few problems which it can be used to solve, but for now let us focus on getting an image from that sensor. This sensor ...
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4 votes
1 answer
630 views

Basic C++ IOT Weather Station

I am making an IOT weather station based on a particle photon that sends data via webhook to one of my other projects. I am very new to c++ and programming in general. What can I do better with my ...
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2 votes
1 answer
84 views

Display temperature readings, with averaging

I've created a program to read temperature from 4 sensors, get an average and close/open 4 relays according to min/max values. Right now I'm trying to add a 16x2 LCD display to show those temperatures ...
1 vote
0 answers
54 views

Sending AT commands via switch case in Arduino

Is this the proper use for switch case? I am looking to make a simple utility for reporting back Wireless AP info, Baud Rate, and Mode of a ESP8266 module. When the program loads it gives the user a ...
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1 vote
0 answers
75 views

Digital clock with many functions - follow-up

This is a follow-up from Digital clock with many functions I used the review mentioned above to optimize the code, but the code can still be made better. I made a digital clock with the use of an RTC ...
8 votes
2 answers
874 views

Digital clock with many functions

I made a digital clock with the use of an RTC (DS3231) and an LCD (16x2). Current functions: Display time Display date (different formats) Display temperature (Celsius and Fahrenheit) Display day ...
2 votes
0 answers
49 views

Generic prologue/epilogue for interrupt driven Atmega328P system

My thinking is that with every application, there are a few fundamentals indicative of all interrupt driven systems. Contrary to popular opinion, assembly programs can be as maintainable as HLL's, ...
1 vote
0 answers
484 views

Arduino-based photo-gate timer (for physics experiments)

The purpose and operation of this program can be found within the comments. I would like feedback on my commenting style: too little? too much? too frequent? (god forbid) not frequent enough? too ...
1 vote
0 answers
216 views

Matlab and WidowX robot arm communication and control

For a class, we needed to control the WidowX arm from Trossen Robotics from Matlab and get as real-time of a feedback as possible. So I came up with a code for the Arbotix Robot-controller which is ...
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2 votes
1 answer
1k views

Initialize union with array?

I want to create a datastructure for network communication (TCP), where I can build up a byte array from small tagged pieces (like in serialized class). And of course I need a reverse behavior of ...
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1 vote
0 answers
17 views

Find index of '/s' before and after text in a char array

For the Arduino programming environment, let's say I have a string literal: char strlit[17] = "_ _ _ Sup _ _ team? _ _ _" I would like to put brackets around the nth word and clear any ...
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2 votes
1 answer
241 views

Arduino Create and send data to Serial Port (Software Serial function)

I have this code written and functioning that will write out the chars in cmd to a serial port for an input of two int values. As the majority of the byte values ...
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4 votes
0 answers
346 views

A GUI program for a Buzzer system using arduino

At the outset, I am a beginner at python, having started out about 2 weeks back. Aim- To create a GUI program, that can adequately work as a buzzer-management system. A buzzer, like those used in ...
5 votes
1 answer
1k views

Simon Says using Arduino UNO

I built a Simon Says game using an Arduino UNO board. This was my first "real" arduino project. I would like to know how to make it better, game mechanics and code efficiency. ...
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1 vote
0 answers
83 views

The ubiquitous blink program on ATmega328P

Although there is a blinking LED, the way this comes about is quite a bit different. This could be called a dead man's switch because as long as you're holding the button down, the blinking doesn't ...
5 votes
0 answers
724 views

8-bit AVR delay using TIMER0 (8-bit)

Using an Atmega328P clocked externally @ 16 MHz, this procedure is analogous to delay routines that use instructions to consume clock cycles. The intent of this algorithm is not to advocate any ...
3 votes
1 answer
747 views

4x4 Matrix Keypad on Arduino UNO

I recently bought a 4x4 keypad. It is one like this: http://www.learningaboutelectronics.com/images/4x4-matrix-keypad-pinout.png Now every code I found on the net was either using a highly overloaded ...
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6 votes
1 answer
88 views

Arduino controller to control the backlighting of a gear selector

Background The gear selector on a car allows the driver to select which state the transmission should be in. In the example picture, one of the five letters (P, R, N, D & S) lights up to ...
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1 vote
0 answers
78 views

Arduino sketch running on Arduino Mega as a web server

I have Arduino Mega with Ethernet shield mounted on top running as a web server. It reads temperature, humidity, rain or not and pot soil moisture and then displays on web page. Can you please review ...
1 vote
1 answer
12k views

Read and write data to/from Serial Port in C#

I am building a console application which will be scheduled in Task Scheduler of Windows to run my code every day at a set hour. Summing up, this application will read and write through serial port. ...
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