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hardware-help

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robotics-help

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Tudic Robert

7/4/2025

I need help with my code. I'm trying to make a code with PID control.

Hello! Sorry for the inconvenience! I have a robot with these components: TCRT5000 sensor with 5 channels, an Arduino Uno board, an L298N board and 2 motors (the L298N board is powered by 6 AA batteries of 1.5V each, and the Arduino Uno board is powered by 4 AA batteries of 1.5V each) and I have a code for it that works, but I heard on the internet and in various places that for a line-follower robot, like mine, there is another type of code, that is, with PID control. I would like, if anyone ca...

Solution:

Thank you ! Is this code good for something ?...

nikcho-kouhai

7/3/2025

nodemcu esp8266 loses connection unless wifi is scanned constantly

I am trying to make something with nodemcu esp8266. However, I am having a bit of an issue. When I connect the esp to the network, it connects briefly (WiFi.status() returns WL_CONNECTED). However, even when it is connected, it doesn't respond to pings or http requests. After about 5 seconds it disconnects (WiFi.status() returns WL_DISCONNECTED). Naturally, the esp is still not reachable. After just a little bit longer, WiFi.status() returns WL_NO_SSID_AVAIL. At this point, it just keeps returning that and the status never changes. After tinkering around for a while I checked what would happen if I scanned the available networks. I did so via WiFi.scanNetworks() I started scanning the networks periodically (about every second, which is also the period at which I am checking the WiFi status) after I started doing that, the esp no longer lost connectivity and was perfectly reachable. Here is how I am connecting to the network: ```arduino...

Fang

7/1/2025

Arduino Project: RFID

Hello everyone my name is Fang and I've been trying to ask to work on this project for about 2-3 days now but still haven't figure it out. The goal for this project is have it where it can read the card ID in console so I can know which card ID is which. I'm having trouble trying to figure this out but still haven't gotten a solution to what this problem might be. I've tried resources from books and youtube videos which will be below this paragraphs but I still haven't uncover what the issue was. If there is a way I can resolve this issue or if someone helps in this situation then that'll be good to but other than that I was wondering if anyone know what I'm doing wrong in order for me to continue having failure after failure....

Godrick

6/30/2025

8x8 Matrix games

Ok, so I'm making a quite complex but fun "Console" if that is the right word for it, I guess it is bc I'm gonna have a lot of different games on it. But anyways back to the subject. Im thinking about making games like snake and other similar games from my child hood. Though the problem is I just finished a tutorial from Freenove that came with the kit that I bought. So if there is anyone who knows what there doing inside the coding community and is seeing this and is willing to help it would be...

autism

6/30/2025

coding help im new (LED)

im trying to control a servo and i keep getting this error

PigPerOne

6/28/2025

Servo Help

I have a honestly pretty dumb question but for whatever reason I cannot figure out how to make this servo work correctly. I have a couple problems. The first being that the servo always rotates 90 degrees no matter what when the sim is first started. The second being that when I do put a write function in the void loop it doesn’t work once nor loop with the lights. Here is the tinkercad, help would be greatly appreciated. https://www.tinkercad.com/things/bm19ASxNey4-dazzling-leelo/editel?returnTo=https%3A%2F%2Fwww.tinkercad.com%2Fdashboard%2Fdesigns%2Fcircuits...

Tessai

6/27/2025

Arduino R4 wifi webserver

Hello, I'm fairly new to software development. Most of my experience is with B&R automation using structured text. I am using Platform.IO in VSC. I have been wondering if i can use the Arduino R4 to set up a intranet site hosted on it using HTML or PHP with proper "live" input/output variables that are mapped to the variables in the actual C++ program? Basically having a seperate file, like html/php along the regular main.cpp ...

Gnomp

6/27/2025

OGX360_T4

I am attempting to add my VKB Gunfighter MCG MKIII and VKB Stecs Space Throttle to this project: https://github.com/Ryzee119/ogx360_t4 The goal is to enumerate the two devices, flight stick and throttle, and read their inputs for the steel battalion controller emulation. I have limited knowledge here and I've been throwing myself at this for a while now. The main crux here seems to be that both devices are perhaps nonstandard HID inputs? I'd greatly appreciate some coaching here....

Sacay, Stephanie Haley T.

6/26/2025

help with arduino 4 wheeled robocar line follower

Hi, is someone still awake that could help with the coding for our school project?

SireSirol

6/25/2025

Differential Steering

Guys, this is the code I found on the internet. Can I create a differential steering system with this? I am using a fs-ct6b TX

code.ino

th3r0_is_n00tihng

6/25/2025

Chess Clock coding

Hi, I'm having a problem with Chess clock code.. I found a code on GitHub with schematics on new Chess clock circuit, but it is only for 16x2 LCD display and not for 20x4 I2C LCD display, which I have. I'm not such a programmer to fix it, so I'm asking is there someone who could help with that problem? AI was fixing it, but any tries it does weren't working. Btw, here's the code: (with credit inside to not copy)...

message.txt

swaritchoudhari

6/22/2025

Wifi R4 Controlling a Servo

How would I control one servo with the r4 wifi uno module from a website or an app that has a slider? Tutorial links are also helpful!...

umemployedd

6/22/2025

2 NRF24L01 Pal/na modules communication

Could anyone help me with making my nrf24-based transmitter and reciver? Im really new to arduino and my 13 year old son wanted to make a rc plane using arduino. He has everything needed to make a transmitter and reciver but dont know how to connect and code everything. So could anyone drop a script or schematics? Heres the parts list: 2x Arduino nano 2x NRF24L01 Pal/na 2x 3.3v step down 1x 4xAA battery box...

FaZ

6/22/2025

"Compilation error: grpc: error while marshaling: string field contains invalid UTF-8"

hi, im pretty new to coding and i have a problem with the compilation of my code for Arduino: when i open the code in arduino ide and once its loaded click on verify everything compiles without errors but when i change anything e.g. put a space character somewhere(even in another file) it outputs the following error: grpc: error while marshaling: string field contains invalid UTF-8...

Gait_Path.cpp

leo002

6/21/2025

My LCD is lighting up but it does not show any text although I tried to code it already.

I'm could not find Bridge to download to my files.

potato

6/20/2025

i got exit status 1 and bunch of errors

can someone say how to fix this

Kfir.c7

6/19/2025

A problem while socket

I have a program where i use socket to communicate with my pc and raspberry pi i send through the computer data which is 2 numbers and like 1800,2200 for example i use Arduino to control the data and then i send it to pi but after a while my pi just says too many values to unpack i tried to put time.sleep(0.1) but still happens

IsakS

6/18/2025

How do I communicate between Arduino and OpenCV?

Hi, I've made python program using OpenCV that tracks my robot and creates a destination for the robot to move to. How do I bridge the python file into my Arduino code, such that my robot moves to the destination? My idea was feeding my motors the x and y coordinates for where my robot is, and where it needs to go. BUT, how can I achieve this? I realize this is not an OpenCV discord, but perhaps anyone here has had some experience with this before? any help is greatly appreciated, thanks in advance!:)...

༺ ☾ ༻

6/17/2025

Oled Oval Eyes

// Emotion overlay if (currentEmotion == EMOTION_HAPPY) { // Happy: draw an upward curved arch using small overlapping circles int radius = 4; int step = 2; // spacing between circles...

LongStepJeff

6/17/2025

ESP 32 locking up

I am using an esp32 to create an airsoft bomb where the players have to use switches and a keypad to disarm a bomb which plays an explosion sound when the timer runs out. the problem is if I enter the code wrong 3 times, it locks up and refuses to continue. I have to restart the whole thing. To be honest I used Chat GPT to help me with the code. it works perfectly other than the issue of it locking up....

message.txt

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Official Arduino Discord - Discuss all things Arduino!

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