Questions tagged [arduino]

Arduino is an open-source electronics prototyping platform based on easy-to-use hardware and software. It's intended for anyone making interactive projects. Questions about programming on an Arduino are off topic and should be asked on http://stackoverflow.com.

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Arduino Security Project [closed]

Hello to everyone this has not done yet I am working on it but when I tried to apply options, I could not move forward since for ex: if you choose option 1 LCD shows "ENTER PASS A" it is fine then ...
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Arduino Nano Serial Port error on Mac OSX Catalina 1.15.4

I have just recently bought my first Arduino board. Unfortunately when I went to upload my first sketch i got an error message saying that no serial port could be detected. Under Tools>Ports I can ...
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ESP32-printing variables to web-server

I am new to the esp32 and am trying to make a web page that prints variables. The code i am using is: #include <WiFi.h> #include <WebServer.h> // SSID & Password const char* ssid = "...
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40 views

Arduino IDE crashes when I use 5GB heap size in _JAVA_OPTIONS

I originally posted this on stackoverflow, but they sent me here, so apologies for the copy-paste. When I'm running the arduino IDE, it crashes, saying that "java could not create a virtual machine". ...
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1answer
152 views

How can work the local name resolution?

I have an Arduino Yun connected to my LAN as client, and this is not my dns server. I can reach it using its hostname: http://arduino.local How can I reach it without a DNS record? I ask to Arduino ...
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109 views

esp32 cam cannot upload please help me asap god will help you too

example file i used CameraWebServer.ino Arduino: 1.8.10 (Windows 10), Board: "ESP32 Wrover Module, Huge APP (3MB No OTA/1MB SPIFFS), QIO, 80MHz, 921600 esptool.py v2.6 Serial port COM6 Connecting......
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120 views

Problems building/compiling sketch for NodeMCU 1.0 ESP 12E on Eclipse Arduino Plugin (Windows 10)

I followed Douglas Schaefer's Youtube video tutorial on how to setup the Eclipse Arduino Plugin for the Arduino Uno and ESP8266. My Arduino Uno sketches build and flash just fine on both the Arduino ...
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1answer
38 views

Can cheap Arduino Nano clones infect or damage my computer?

I recently purchased several Arduino Nano v3 clones from a merchant on AliExpress. I got them for around $2.00 each. I'm aware of the possibility that they may arrive damaged or just not working. ...
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48 views

Arduino connectiond problems

I have problem with connecting arduino UNO to my computer ( my computer is HP EliteBook 830 G5 ). I bought it from here: Arduino UNO. It arrived with original Atmel ATMega328P microcontroller and ...
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51 views

multiple physical USB conectors, single COM port?

I want to run a bunch of arduinos off a single computer, but I want all the arduinos to be in the same COM port. I don't mean having all of them plugged into a USB hub, I mean each different arduino ...
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562 views

Cannot set up Arduino on Visual Studio Code

Never been able to get past the following message: "Cannot find Arduino IDE. Please specify the "arduino.path" in the User Settings. Requires a restart after change." I realize that it is my error in ...
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19 views

Possible to run this program from CMD Line?

I have this program and would like to know if it can be used from a command line to simplify a task. Basically you hook up a FTDI FTX series board and press a button to download information stored on ...
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70 views

compilation fail of Arduino Ethernet 2.0.0 library using arduino-mk

I have some arduino code using including with the Ethernet 2.0.0 library installed. When compiling the code using the official arduino IDE, all works fine outside of some warnings inside Ethernet/...
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1answer
34 views

How to launch Arduino after successful installation on Ubuntu

I've installed Arduino 1.8.9 for Linux 64 bits directly from arduino.cc website, on my Ubuntu 18.04LTS After a successful installation I get the Arduino folder inside ~/Documents However I don't ...
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199 views

android studio ERROR: Failed to resolve: com.android.support:appcompat-v7:24.0.0

enter image description here https://github.com/ujink/Android-HC06-Arduino was downloaded from Github. An error has occurred. i want to help. please help
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18 views

File.read on arduino Yun resulting in characters not in the file

When attempting to run an xml parser on my arduino yun, rather than the expected results of the contents of the xml file I get the following. Preparing to Parse 11:13:14.633 -> Ready to parse 11:...
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1answer
33 views

How to format a USB which uses attiny85 based microcontroller and has been programmed

I am making experiences on the Digispark USB with attiny85 micro-controller. So I programmed it so it can launch very basic keyboard strokes when plugged, i.e, when it is plugged, it open it tries to ...
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1answer
28 views

unexpected characters preceding filenames when using LS

We have an Arduino Yun Rev 2 with extroot set up via the YunDiskExpander sketch onto a 32 GB sandisk microSD partitioned to have 512 MB for the extroot. Oddly however whenever we use ls the results ...
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78 views

Node MCU boards suddenly stop connecting to my compter

I hope this is the right place to ask this. If it's not pointing me to the right place would be highly appreciated. I am using BunsenLabs Linux together with the Arduino IDE to upload my code to my ...
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59 views

MicroPython REPL on Nodemcu not responding

I have been trying micropython on esp8266 nodemcu. I have flashed the nodemcu with micropython firmware and verified the operation. But when I try to open the REPL prompt in Thonny IDE, I get the ...
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294 views

Compilation error in arduino IDE while integrating with DHT11 sensor

I have added the DHT11 library already but I am still getting this below mentioned error while compiling. Kindly help me to fix this. Thank you in advance Arduino: 1.8.9 (Windows 10), Board: "...
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6 views

HC-05 doesn't work after renaming

I renamed HC-05 using arduino and serial monitor. After that it doesn't want to receive or send any data. What should I try to do?
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317 views

How to power on a computer after a power failure?

Background I have a Ubiquiti Network Video Recorder (NVR) connected to an Eaton 3S 550 UPS. The NVR is basically a tiny PC running Debian, which records video from network cameras on the LAN. My goal ...
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1answer
208 views

Arduino IDE isn't starting on Windows 10

I've tried to restart my PC, uninstalled and reinstalled, and I've tried older versions but the thing still won't start. I've also turned off my antivirus and firewall but that didn't work either. I ...
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1answer
68 views

ESP32 cannot bypass Firewall

I am using ESP32 (which is Arduino based microcontroller with to connect to a Unity game I am building on my PC. I am using the PC as a WiFi Hotspot and the ESP32 is connecting to that hotspot using ...
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361 views

How to install Arduino ide on Raspberry Pi 1B?

When I try to run Arduino from the GUI I just doesn't launch. From the terminal I receive the error: Error occurred during initialization of VM Server VM is only supported on ARMv7+ VFP The ...
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227 views

using arduino in simulink external and normal mode

I have been using clone Arduino uno and have been trying to run it on the simulink for days, but I get these errors. I've searched everywhere, but none of them worked. I deleted and installed the ...
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1answer
2k views

MAC OS and Arduino IDE updated fails to compile ESP-12E NodeMCU 1.0

MAC OS updated last night to macOS version 10.15 Beta. Today, Arduino IDE will not compile a sketch, even after again downloading and installing the latest ARDUINO 1.8.9. "Error compiling for board ...
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15 views

How can i remotly upload a .ino file to arduino using windows iot10

I have an application running on rasppbery pi 3 and windows 10 iot. The raspberry pi is connected to the arduino and comunicate with it for the programe (The arduino collects data from sensor and the ...
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33 views

Platformio (flatpack) does not recognize ports

I just started to use Visual Studio Code with the Platformio extension. Since I am using Archlinux I installed it via flatpack (the oss-version). So for "usual" programming stuff everything works fine ...
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179 views

ESP8266 serial port does not show up on Arduino IDE(OS: Ubuntu 18.04 LTS)

My board is not the original Arduino board. When I had Ubuntu 16.04LTS, I didn't find this kind of problem with the same board, but now I encountered this. Is there a need to install USB to UART ...
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35 views

Arduino Uno no longer allowing me to upload my sketch

I’m trying to upload my sketch to my Arduino Uno but get the following error message: avrdude verification error content mismatch. Does anyone know what this means and what I need to do to fix this ...
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24 views

Arduino Pro micro Serial becomes inactive after a certain time with Android OTG

I am using an Arduino Pro micro connected to an Android smartphone (Oreo) via an OTG cable. I am able to send and receive serial commands with no issues. However after a certain duration ...
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1answer
49 views

trying to make 2 motors to rotate at same time [closed]

im trying to make 2 motors to rotate at ones with the following skecth #define MotorSpeed 7 #define MotorDirection 6 #define MotorSpeed2 5 #define MotorDirection2 4 void setup(){ pinMode(...
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777 views

Arduino: can't open the device “/dev/ttyACM0”: Permission denied

On linux (Ubuntu 18.04) and Arduino (version 1.8.5) I can't upload code on the Arduino MEGA 2560 board. I've got error message: Arduino: 1.8.5 (Linux), Board: "Arduino/Genuino Uno" Build ...
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33 views

arduino mega 2560 wont show up anymore at al

i have a arduino mega 2560 with an atmega 16u2 chip and it always worked. yesterday i tryed to put it into all of my usb ports but it won't show up anywhere not in the arduino ide and neither in my ...
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1answer
49 views

Arduino power source

I am trying to connect an external power source to the arduino while attaching it to the computer. That is because the way I wired the circuit is so that the components directly connect to the power ...
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629 views

How to deal with “avrdude: stk500_recv(): programmer is not responding”?

my OS:Ubuntu 16.04 arduino IDE:arduino 1.8.9 arduino board:arduino UNO (another is arduino MEGA 2560, the same error) When I upload the program using arduino, I report the following error: avrdude: ...
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1answer
577 views

How to represent a Carriage return (\r, ^M) as part of text over serial

I am trying to send a message including carriage returns (represented without pressing enter) over a serial connection. It works if i press enter with an open serial connection, but I have not found ...
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233 views

Link serial /dev/ttyUSB0 to /dev/ttyS0

I have a program that communicates with an Arduino through the serial port but somehow the Arduino is showing up in the computer as /dev/ttyUSB0 and not /dev/ttyS0, which is what the program is ...
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96 views

Arduino Uno not showing up in tty devices?

new laptop and I have never had this issue before. My arduino Uno doesn't show up in the tty devices. lsusb: Bus 002 Device 002: ID 8087:8000 Intel Corp. Bus 002 Device 001: ID 1d6b:0002 Linux ...
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380 views

ESP32 less memory size [closed]

When i compiled my program it shows following error. Sketch uses 1527594 bytes (116%) of program storage space. Maximum is 1310720 bytes. Global variables use 58884 bytes (17%) of dynamic memory, ...
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1answer
45 views

One Arduino board no longer recognized, but others are

I've been playing around with an Adafruit Neotrellis M4 but Arduino IDE is no longer recognizing it as connected. I've tried using the reset button but it doesn't seem to be doing anything. The LED on ...
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1answer
382 views

MQTT large delay between messages

I have a testing configuration which consists of a raspberry pi 3 b+ has a mqtt server, an esp32 with some led´s and a webpage to toogle them (webpage and esp32 are clients). For the esp32 i am using ...
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1answer
229 views

Arduino with HM-10 doesn't always receive the complete message that was sent [closed]

I am a beginner trying to communicate between an iPhone and an Arduino Uno. I have an HM-10 BLE module device wired to my Arduino. I use it to send and receive messages from my iPhone. My Arduino runs ...
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2answers
3k views

Arduino IDE path for VS Code setup

Arduino IDE installed as an App (in Windows 10), so this path ("arduino.path": "C:\Program Files (x86)\Arduino",) doesn't exist, what is the correct one?
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1answer
404 views

Send Wake on Lan (WoL) request manually through the ethernet cable using an Arduino or Raspberry Pi

I'm trying to make a circuit that "intercepts" the ethernet cable before it enters the computer, allowing me to send a "Magic Packet" through the cable manually - by the press of a button for example. ...
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0answers
70 views

Serial communication doesn't work RPI--ARDUINO uart [closed]

i want to use serial communication to send data from an arduino nano to a raspberry zero w. I used this method of connecting the pi to the arduino I used this code import serial port = serial....
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207 views

Wake computer via Wake On Lan using Arduino/Raspberry Pi

Is it possible to use Wake On Lan (WOL) without going through the router? Using an Arduino or Raspberry Pi connected to the internet to manually (through the ethernet port) tell the computer to wake ...
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1answer
371 views

MacOS connecting to bluetooth module

I have lots of issues connecting Mac OS Mojave to my sparksfun Bluetooth module RN-42. I can pair my Bluetooth module to my Mac, but after several seconds, the connection goes away. However, for the ...