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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Update Dynamically Tkinter Widget Scale from Arduino Ports using python and firmata

I'm having trouble trying to get Arduino digital ports values and set these values into a Python Tkinter Widget Scale. I'm using Python and Arduino with Firmata. I'm able to access my arduino board ...
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254 views

Ultrasonic Flowmeter Using TDC-GP22 and Arduino Uno

I'm working on a project of Ultrasonic Flow Meter with TDC-GP22 using Arduino UNO. I used the library of leokoppel In my code,the configurations of the registers are copied from the Application Note ...
3
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1answer
1k views

Flash String Helper object as variable

So I have a Bunch of commonly used char arrays to build commands in my library. So to preserve memory, I have them put into flash, via PROGMEM ext, typedef const char PROGMEM ProgChar; ProgChar AT[] =...
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2answers
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Atmega328P-PU: Programmer is not responding

Few days ago, I built my own custom Arduino on the breadboard. It is built according to tutorial on http://www.crash-bang.com/resource/breadboard-arduino/. The Atmega328P-PU is already burned with the ...
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2answers
911 views

How to use external libraries in CLion

I would like to use the external libraries that are downloaded by Arduino IDE into the default sketchbook location (~/Arduino/libraries/). If you open Library Manager in Arduino IDE and if you ...
2
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0answers
93 views

qMenuSystem using DigoleSerial library doesn’t work on my I2C Monochrome OLED

Just like the title says I’m trying to make qMenuSystem to work with my oled display. Here is what I know so far about my display : - It's a Monochrome OLED 128x64 (Blue) Display - It's connecting ...
2
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0answers
119 views

Problem in integrating speed sensor LM393 with L298N

I am currently working on a project that has an automatic support wheel for bicycle. The mechanism of this project is when the speed sensor is detecting the RPM of the rear bicycle wheel it will ...
2
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0answers
394 views

Measuring Amplitude/Frequency of sound

I need to read an analog signal at about 500-1000Hz for at least 5 seconds. I've a battery powered microphone wired into an analog and ground pin on my arduino and am trying to measure the frequency ...
2
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0answers
520 views

How to use SPI to set/ read registers for a sensor (Avoiding need for Github Lib)

Ok so as some readers might have seen, my current project involves using MPU's. The idea is sending data via CAN bus to a controlling MCU to then send to a raspberry pi to perform the calculations ...
2
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0answers
86 views

TM1638 making high pitch sound?

I have a TM1638 board with 8 seven-segment displays, 8 LEDS, and 8 buttons. Each time multiples leds are on, the board makes an annoying high pitch sound. I'm controlling it with an Arduino Uno. ...
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0answers
435 views

Is it possible to put ATtiny85 to sleep while using TinywireS?

I have an arduino uno as the master I2C device talking to an ATtiny85 as the slave. What I want to do is have the Attiny85 receive a message from the UNO to tell it to power off which will then ...
2
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277 views

How can i change by esp8266 baudrate, as I accidentally changed the baudrate to something else(which I dont remember)?

//In order to connect, SoftwareSerial esp8266(2,3); // the TX pin of esp8266 is connected to pin 3 of // arduino uno and RX pin is connected to 2 // we need to pass baud rate to begin ...
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Slower nRF24L01 round trip delay than expected

Short/summary I expected that the round trip delay of a nRF24L01+ would be less than 1 ms. In practice I see around 3 to 5 ms and other sources have similar values. Does anybody know why this round ...
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0answers
1k views

Arduino Uno doesn't work as Manchester code receiver

I'm sending some data from ATTINY85 to Arduino UNO using 433Mhz modules. Coding is Manchester using Manchester.h library from here. Transmitting data works perfectly, 433 receiver gets data alright. ...
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102 views

Problem with coding

Recently I got this code from a friend which is unfortunately unavailable right now. When button is pressed two halfbridges are supposed to change directions with increasing frequency of direction ...
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4k views

Run Servo when detect object on OpenCV Python

I want to connect OpenCV (Python) with arduino Uno when it detects a tennis ball. OpenCV code: import numpy as np import cv2 import serial face_cascade = cv2.CascadeClassifier('tennisballdetect.xml')...
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0answers
228 views

Arduino UNO WiFi RestServer returning “not found”

I'm trying to run RestServer on my Arduino UNO WiFi, and I'm currently using the tutorial from Arduino: http://www.arduino.org/learning/tutorials/boards-tutorials/restserver-and-restclient Everything ...
2
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1answer
566 views

ADS1262 and 2.2 SPI TFT (Two SPI Slave) with Arduino

I am interfacing two SPI slave module i.e. ADS1262 and 2.2 SPI TFT with the Arduino Ethernet board. When I test each device on its own it works. Initially, I interfaced the TFT to the Arduino and it ...
2
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0answers
241 views

DHT22 reading weird values

I just hooked up a DHT22 I had laying around in a parts drawer to test something and it is giving out some crazy wrong values, I am running the adafruit library's unified example and this is the ...
2
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0answers
507 views

Slow response from ENC28J60

I am making a circuit which turns a LED on and off through internet. I am connecting an Arduino to a LED and to an Ethernet controller(ENC28J60), but when I make a GET request to the device, it takes ...
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0answers
316 views

Is Arduino WiFi101 library fully compatible with Arduino MKR1000 with WiFi HW?

Will all the classes in this library work with the MKR1000 with wifi hardware? The guide mentions "wifi shield". So, does the library work exactly the same with the Arduino MKR100 (with the onboard ...
2
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0answers
494 views

Nordic nRf905 (433MHZ) with arduino receive garbage data

I am interface Arduino with nRf905 in receive mode use 433 MHZ. I Have follow this link http://www.electrodragon.com/w/NRF905_Transceiver_433MHz-Wireless_Module. And for transmitter, I am use RF-...
2
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0answers
624 views

Camera VC0706 not found

I tried connect my Arduino Uno R3 with module camera VC0706 following this instruction of Adafruit: https://learn.adafruit.com/ttl-serial-camera/using-the-camera. [VC0706] --- [Arduino] Vcc --- ...
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0answers
619 views

RFID Code (and setup) works on an UNO but not on the Yun

We're using two RDM6300 RFID readers for this, and the code works when plugged into an UNO, but not when connected to the Yun. We have one of the rfids plugged into the rx pin (0 on the digital side) ...
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0answers
442 views

Connecting arduino and EV3 using I2C

I'm trying to connect arduino uno and ev3 by using this guide (http://www.dexterindustries.com/howto/connecting-ev3-arduino/), everything works perfectly but when i tried to use analogRead block to ...
2
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0answers
2k views

Sending data from Arduino UNO as a SOAP request

I have a servo motor on one end which can be turned ON and OFF with web service sending SOAP request. In the other end I have my Arduino UNO with ESP8266. Currently, I am able to send HIGH or LOW ...
2
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0answers
2k views

How to save data to SD card using Memory Shield Module SPI

I am trying to save some data to the SD card using the memory shield module that I read from HC-SR04 Ultrasonic Module. The data that gets printed indicates error. This is how my SD card module is ...
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0answers
2k views

How to upload .hex file to Atmega8 Using Arduino IDE and Uno as an Isp?

I want to upload an .hex file to an Atmega8 chip (SMD). I want to use the Arduino IDE and an Uno as the ISP program. But I'm unable to find any details on how to load a sketch which is in .hex format. ...
2
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0answers
385 views

Arduino Neopixel affecting IR receiver module

I have tried this on both an Arduino Uno and an Arduino Mega2560. my issue is as follows. Without a 150 LED string of addressable pixels attached, I can pretty consistently capture and read the input ...
2
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0answers
226 views

error with avrdude command line using arduino as isp (i think)

I am trying to upload a .hex file to my attiny85v-10pu and using my arduino as a isp (i think thats the right term) but it come up with this error. ser_open(): can't open device "lpt1": The system ...
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Using Johnny-five API with RFID Controller Shield

Is it possible to use the Adafruit PN532 NFC/RFID Controller Shield with the Johnny Five API? I've searched the depths of google and I'm unable to find anything so far. If it is possible, how can I go ...
2
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0answers
6k views

Sending AT commands to a gprs shield using serial port

I have a GPRS shield connected to an arduino uno board, i want to use the shield to send sms and do phone calls, from a C# Wpf application, the arduino is connected to the application using the serial ...
2
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0answers
172 views

Uno Ethernet shield and TMP36 reading

I am just getting started with my Uno via the Vilros Ultimate Starter Kit. I've done all of the sample circuits and played around with a few other things. Today I connected the Ethernet shield with ...
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0answers
174 views

How far can i go just with this starter kit?

I want to buy this kit: http://www.banggood.com/UNO-Basic-Starter-Learning-Kit-Upgrade-Version-For-Arduino-p-970714.html However, as shipping stuff from China takes like 3 months to arrive, i need to ...
2
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0answers
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How to read temperature using arduino uno board with PT100 RTD sensor?

I am new to arduino programming. And almost inexperienced. I am looking to program my arduino Uno board to read 2/3/4 wire configuration of PT100 RTD sensor (in accuracy levels of atleast 0.5°C). The ...
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0answers
776 views

Why won't Wifi Shield detect any networks? Even really close

I just purchased an Adafruit Wifi Shield CC3300 and strapped it onto my Arduino Uno board. I'm running this basic sketch that I found to test the functionality of the Wifi Shield: http://arduino.cc/...
2
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0answers
199 views

Why does avrdude error appear when interfacing GLCD with arduino uno in ubuntu

I want to interface a GLCD with arduino uno. The GLCD is JHD12864E. The connections are as shown in this image I downloaded the OpenGLCD library and uploaded HelloWorld program from it. I got ...
2
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0answers
1k views

Interfacing SD card with arduino without shield

I am trying to connect SD card with arduino without using a shield. To convert to 3.3v, I have used voltage divider circuit as described in these two sites: http://garagelab.com/profiles/blogs/...
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0answers
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Hub RFID Arduino + WIFI

I will start an Arduino project and its main requirement is that some RFID readers (at most 6 readers) be connected and controled by the arduino board. I do not have a strong background in ...
2
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0answers
674 views

Negative value conversion for modbus slave

I have an analog sensor which reads values 0-5v, -75 degrees to 75 degrees. Now I have converted to +75 degrees and -75 degrees format depend on the voltage. From 2.5v to 5v data is read properly (i....
2
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1answer
3k views

Running two stepper motors with two rotary encoders

I'm really bad with this coding part of using two rotary encoders to control two stepper motors [using 28BYJ-48 stepper motor with the ULN2003 board]. This code works fine using one rotary encoder for ...
2
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1answer
1k views

How to send HTTP request to specific port using Ciao?

I currently have a working REST client on my arduino, but the requests always go to port 80, how do I make it send the request to a specific port? This is my current code: /* File: RestClient.ino ...
2
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1answer
48 views

arduino sketch on Win7 vs. MAC op system?

I have a friend who is just getting started with Arduino UNO. He downloaded a sketch and is using a UNO on Mac OS. He loaded the sketch and verified. it comes up with errors. He sent me the same ...
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22 views

Trouble with basic communication between two NRF24L01 modules

Introduction I am trying to setup a radio communication using the NRF24L01 module because I want to use it to control a tank. The first thing I did when I got the modules was watching some basic ...
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35 views

Chance light intensity in a pwm pin using LDR using Arduino UNO

I am using proteus and Arduino software to simulate my circuit. What I need to do, is to have an LDR in my Arduino uno. When light intensity increases in my LDR, I need another LED which is connected ...
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0answers
48 views

NRF24I01 with antenna Communication Delay

I am doing my senior design project which is due in a week, I am currently using the NRF24I01 with antennas for both the transmitter and the receiver. I am building a robot that is suppose to climb a ...
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0answers
32 views

L293D to change the direction current and amplify it - Temperature-Stabilizer

I have a question about my project. I'm going to make a temperature-stabilizer. To make this, I think I should use a TEC with a H-bridge and a LM35. First of all, I tried to make a H-bridge by myself, ...
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0answers
48 views

How to get my LCD contentiously updating with data from sensor?

EDIT DOWNSTAIRS: Hello beautiful people of the internet! How are you smart people doing with all that's going on these days. Okay so the title says it pretty much. I've got a code and inside of my if'...
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0answers
59 views

Uploading a sketch without using the usb cable

I've lost my usb cable used to upload a Sketch to my arduino from my laptop. I do have my Bluetooth 4.0 module. Can I use it to upload my sketches?
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36 views

Project concerning wireless communication between raspberry pi (transmitter) and arduino uno(receiver) using nrf24l01. Receiver not working

We are trying to send a message using NRF24L01, raspberry pi as transmitter and arduino uno as receiver. Our concern is, the receiver arduino might not be working because we are not getting the proper ...

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