Questions tagged [arduino-uno]

The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328P microcontroller.

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8 views

Control Servo motor via Python GUI (PyQt) component “QDial”

I want to control a servomotor via a Python Gui (PyQt) component "QDial". Hopefully the servomotor should rotate "simultaneously" with the Dial in GUI. Below is the related code: ...
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2answers
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How to make a dynamic menu with a sub-menu ( Arduino mega or Arduino Uno)

I have an arduino mega with a LCD shield (from keyestudio KS2056). I am trying to create a menu with a submenu that would have addable and removable strings based on inputs from a RFID scanner(addable)...
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My Left infrared obstacle avoidance nodule seen to not working properly Uniroi car robot UA060 [closed]

My Left infrared obstacle avoidance module seen to not working properly. First the green light is off and it don’t see the left obstacle. I did interchange the two module together,And the problem ...
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2answers
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Power Arduino and LED strip

I saw this question about powering Arduino and LED strip. So, I searched for a 5v 4a power supply and foud this one. How does that adapter provide power for both Arduino and LED strip? I thought I ...
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1answer
12 views

What does display.setSegments(&segto, 1, 1); do?

I am using a TM1637 display for my Arduino Uno. The goal was to just light up one point of the colon in the middle - what seems to be kind of impossible to accomplish. During research I stumbled over ...
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19 views

Burning Digispark bootloader without an Arduino

I've been wondering if there is any method to burn a Micronucleus bootloader into a blank ATtiny85 Digispark using just Windows or a Linux distro, and not needing another Arduino board such as UNO ...
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1answer
3k views

RFID-RC522 Cannot read from MIFARE Ultralight

I tried many ways to get and print UID and other data from MIFARE Ultralight but it always ends with error. I am using RFID-RC522 reader with Arduino UNO and MFRC522 Library. I can normally get and ...
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1answer
30 views

I can't run shell commands on Linux through AVR sketch (Arduino Yun)

I'm a little confused with some Process.h methods. I'm trying to run the command "nc 192.168.1.15 9911" to the Linux processor through a sketch. The appropriate netcat listener is waiting on ...
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1answer
470 views

SPI communication Problem Arduino

I'm trying to set up SPI communication between two Arduinos (UNO and Mega), I want to read the status of the slave output pin from the master. I connected a diode to pin 9 of Mega and I wanted to ...
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2answers
71 views

Communication between 2 arduino boards

I am not really 100% too sure how to do this but I am trying to make my arduino UNO communicate with my arduino MEGA. The reason why I needed to do this was because I was using the RFID module along ...
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2answers
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Why is my passive buzzer clicking instead of buzzing when set to HIGH?

everyone. I am working on learning Arduino from scratch and I am on the buzzer lesson. The tutorial I am following consists on writing a code to get an input from the user in the form of an integer ...
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37 views

Matrix and State Space Arduino Implementation

I wrote an Arduino Matrix class. Then I used this class to implement State Space on Arduino. During tests I stomped upon a problem. After starting the program it stops at some point. I have no idea ...
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Why doesn't this code work as expected? [closed]

I expected the LED on ld1 (pin 7) to flash with a period of D1 (300) milliseconds. Similarly for ld2 (pin 8) with a period of D2 / 1000ms. int ld1 = 7, ld2 = 8; /// led out put int D1 = 300, ...
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3answers
64 views

NRF24L01 Transmission Problems between Arduino UNO and Arduino Nano

I'm a beginner in using NRF24L01 tranceiver module. I tried sending a simple "Hello world" using Arduino Nano and a Arduino UNO with the use of two NRF24L01 modules. I don't get any output ...
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1answer
37 views

NRF24L01 +pa +lna modules do not communicate

I am building an rc airplane and I want the controller and the plane to communicate using 2 NRF24L01 +pa +lna modules. I am using an Arduino UNO and a Mega. I hooked them up corresponding to this ...
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1answer
48 views

Attiny85 microcontroller programming without arduino

I have decided to make a simple project so thinked about arduino but that seems very worthy so i decided to use attiny85 ic for my project,but i don't have arduino or avr to program it. Is there any ...
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28 views

Adding words in TTS library of Arduino IDE [closed]

How can I add more words in TTS library of Arduino IDE ? https://github.com/jscrane/TTS
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2answers
316 views

Arduino Uno board not recognized in IDE. Board is not in device manager!

My arduino uno is not recognized by the Arduino IDE. I'm using 1.8.0, The IDE is not showing the COM. The tool section is showing only COM 1, i.e. the hardware. I opened Device manager, there is no ...
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1answer
38 views

TX,RX,ON,l LEDs were red at all time

First of all Thank you for reading my broblem.Before coming this erro I did a project in my Uno board by using a Bluetooth module.after that; when I powered the board to uploade another programe ;4 ...
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1answer
26 views

3,6V DC motor spinning with L298N and Arduino

I'm trying to control a re used DC motor from a drill (3,6V) with a L298N and a Arduino. It's powered with a 5V - 60A power supply. I tried to follow this step by step tutorial (https://www.youtube....
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2answers
78 views

What do you do when you finish a project?

I have just about completed my first Arduino project using an Arduino Uno board, but is that what I use inside the finished device? I figured I’d keep the Uno for future projects and have something ...
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1answer
211 views

SIM800L GSM module is not working

I'm testing SIM800L GSM module with Arduino UNO and module is blinking 3 times every 15 seconds or sometime every 45 seconds. Why this is happening? In serial monitor it shows Message Sent ...
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1answer
140 views

Cannot get esp8266 - 12 wifi module to always read analogRead incoming voltage accurately

So I have and arduino uno that is firing an output on pin 8. This code is not in this file just to be clear. From there Im taking that output and using it to fire pin 0 on the wifi module. Im using ...
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0answers
33 views

Text to speech converter for Arduino Uno [closed]

Will anyone please provide me the program for text to speech converter for the following words using Arduino Uno "Hello" "How" "Name" "My" "Dolpho" ...
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2answers
43 views

How to interpret Serial data received by Bluetooth module

I'm experimenting with a hc-05 knockoff the JDY-30 and am confused about the Serial data I'm getting from it. I downloaded an app called BlueUino to send commands from my Android to my Arduino Uno via ...
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2answers
52 views

How to use Atmega328p-PU from an Uno, on a breadboard without a crystal

How do you use Atmega328p-PU from an Uno, on a breadboard without a crystal?
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1answer
42 views

How to send 2 data to processing from Arduino

I am new to Arduino and processing so sorry for any mistakes. I have a problem with sending multiple data to processing from Arduino. I can send 1 data easily ut I can't send more than 2 data can ...
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1answer
55 views

Uno went in washer and when I shake I hear something shaking around. What do I hear?

My friends Uno went in washer. I gave it a week to dry and when i plug it in, it works. But when I shake I hear something shaking around inside it. What do I hear shaking around?
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1answer
34 views

QR code scanner connected to arduino won't respond

i bought a qr code reader from banggood, here's the link: https://www.banggood.com/GM65-1D-2D-Code-Scanner-BarCode-Reader-QR-Code-Reader-Module-p-1440532.html?rmmds=buy it works pretty well and i'm ...
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1answer
121 views

Code conversion

Following is the zabbix documentation with the query header format. Document Zabbix I have difficulty implementing this header in C ++ (Arduino), I saw an implementation of what I need in this forum ...
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0answers
37 views

Arduino IDE sketch for firebase-Dragino Shield v1.4

I would really appreciate it if someone could recommend a sketch for Arduino IDE that I can use to connect my arduino Lora shield v1.4 to firebase. All the sketches I find are for only esp8266 module. ...
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28 views

Bootloader error on atmega328 u [closed]

I am getting error while uploading boot loader on atmega328 u this error message is showing Error while burning bootloader. avrdude: Expected signature for ATmega328P is 1E 95 0F Double check chip, or ...
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2answers
57 views

How can I make my Arduino Uno press Space on my laptop keyboard?

So I wanna build something which, when it receives a remote signal, presses the spacebar on my laptop keyboard. I tried using the Keyboard.press() but it is available only for Leonardo. Is there any ...
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1answer
47 views

Junk values in EEPROM. while writing large values

Facing an issue while writing a large value (like 2000-5000) to EEPROM using EEPROM.put(). For example, While writing 2000 values to address 5 of EEPROM. Some junk values are written automatically to ...
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3answers
15k views

Arduino Uno - ESP 8266: sending AT commands via Code

I bought a ESP 8266 & I am able to send AT commands and receive response via serial monitor when I upload a empty sketch. I changed the baud rate from 115200 to 9600 by using AT+CIOBAUD=9600 and ...
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1answer
83 views

Send Arduino data to Database using ESP8266

My project is to receive data from Bluetooth (HC-05) sensor and storing it in the database. I have successfully received data from Bluetooth sensor and stored it in a String variable. Now i have to ...
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1answer
48 views

How to get data out of loop?

hi i wrote a code(i modified it actually, please forgive me, im in a mess please help me if you can) for my esp8266 to serial communicate with at tiny 85 ,it will monitor switch state and publish ...
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1answer
26 views

Motor does not work for a specific case when programming with L293D motor driver shield

I tried to make a car that moves using a 4x4 keypad. Pressing "12" unlocks the car and sets the motors to move forward. After that, if I press 4, the speed of the left motor is reduced to ...
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1answer
2k views

DT-06 program using arduino uno

I'm working to program DT-06 wireless wifi module. And right now when i'm trying to program i get the following error message : espcomm_send_command: can't receive slip payload data Module RX - ...
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1answer
102 views

How to use a USB host shield with different HID Joysticks

I bought a Sparkfun USB host shield a while ago and have been using it using my Logitech Extreme 3D Pro Joystick. There is some example code for that one which makes it nice and easy to work with. ...
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0answers
17 views

How to light LEDs for serial data from Arduino over RS232 [closed]

I am a newbie to electronics and Arduino. I am in need of help. Any help will be greatly appreciated. Here's is my problem statement I want to light up 8 LEDs based on the serial data sent by arduino ...
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1answer
235 views

Connecting Logitech F310 gamepad to Arduino Uno and Arduino USB Shield

I am trying to connect Logitech F310 gamepad to Arduino Uno with ARDUINO USB HOST SHIELD https://store.arduino.cc/arduino-usb-host-shield using http://github.com/felis/USB_Host_Shield_2.0 library. ...
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1answer
29 views

SPI Slave Programming for Arduino

In my application Arduino Due is configured as master and instead of the actual slave device I am making use of Arduino Uno as Slave.I will share the Master code which I have worked out. Can Anyone ...
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1answer
23 views

Control aquarium air pump flow rate using Arduino [closed]

I have an aquarium air pump (https://fluvalaquatics.com/ca/product/q1-air-pump/) which I usually regulate it manually via a simple plastic valve (https://www.amazon.com/XMHF-Shaped-Aquarium-Control-...
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1answer
23 views

How to determine the value of a particular bit in a particular byte [closed]

I was trying to write a code which should take in a byte and out of the byte, each bit has a function to do I have not thought of the code completely, so, is there a way t
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5answers
25k views

Why is my real time clock getting the wrong time from my PC?

I want my real-time clock to set its time as the time on my PC. However, when I run the following sketch, the real-time clock reports the time as being 32-33 seconds earlier than my PC says the time ...
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2answers
997 views

TinyGPS doesn't give longitude latitude and other data

I'm trying to get GPS coordinates using TinyGPS. But it keeps printing ********* for the data fields. Any idea on how to get this working?. Here is what the serial monitor looks like. Here is my ...
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3answers
262 views

Arduino Uno not working after Short-circuit

While wiring up my new Arduino Uno R3, I accidentally shorted the 5V pin and the GND pin (for less than a sec). It was powered by a 12V 500mAh power supply through the Arduino DC power jack. . The ON, ...
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1answer
26 views

Error while inputting EEPROM.read() and EEPROM.write()

I am trying to store data in ATmega328 (Arduino Uno) using the following code using tinkercad: #include <EEPROM.h> void setup() { int addr, data=1; Serial.begin(9600); for (addr=0; addr&...
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1answer
26 views

Arduino Uno R3 cannot detect GPRS Shield SIM900

I am new to Arduino which I got only this week for my project which sends sms from my windows application. I have Arduino Uno R3 and GPRS Shield (Simcom) Sim900 (S2-1040S-Z0912) I am currently ...

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