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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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 ...
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58 views

Serial Write fails to send when Motors moving

I have an unusual bug with the code I have written for my rover V2 robot. I have a raspberry pi running some computer vision code written in opencv tracking an object doing the heavy processing. ...
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303 views

Dual OLED displays showing the same image via SPI?

Is it possible to connect two oled displays via SPI to my Uno and send a single image to both displays, with each refreshing at an identical rate? I have gotten a single oled display (SSD1306) to ...
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Issue regarding executing sketch code when not connected to USB

`I have an Arduino Uno A000066 Board R3 that has an Arduino A000079 Motor Shield Rev3 attached to it. Also I have connected two DC Servo Motors to the Motor Shield and wrote the following sequence: ...
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589 views

Xbee S2 API Data Packets dropping out

I made a setup which consists of 3 Zigbee's, 2 routers(Zigbee S2C's) and 1 coordinator(Zigbee S2). The routers are each connected to arduino nano which collects data from 2 FSR's and an IMU(frame type:...
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299 views

Xbee can send from arduino to XCTU, but not the other way around

I have two arduinos that I would like to use to communicate with two xbees. I programmed both xbees with the xbee explorer breakout boards in XCTU, and got them to communicate on XCTU. They are XB24Cs,...
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335 views

How do I go from modules to PCB?

For my engineering class, I am designing a digital scale. I have already made a working proof-of-concept by using jumper wires to connect several arduino modules to an Arduino UNO. I want to make a ...
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436 views

I can't receive data from Arduino through Bluetooth

I am developing an app that controls an Arduino robot. For that I need to communicate through Bluetooth. That means sending and receiving data. Why receiving? Because I also have sensors on the robot. ...
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109 views

Upload custom trinket firmware

I'd like to disable the trinket 10-second bootloader when powered up, so it will just begin running the program. I would still like to be able to press the reset button to re-program it. I found an ...
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86 views

Communication between 2 nRF24l01s and 2 Arduino unos

I am having a logical error that I can not figure out with the communication. I am communicating fine with the two boards such that I can send and receive data. Code to my Transmitter and Receiver. ...
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How to write an integer value to an RFID tag?

I'm working on a project in which two Arduinos are to be used, each Arduino is connected to an RFID reader. First RFID reader should write an integer value to the tag detected whereas the second RFID ...
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625 views

Yet another “Mac cannot find USB serial port” post

I have read about every post about people having issues with their Arduinos on Macs. I have a 100% authentic Arduino UNO, that I cannot by any circumstance manage to connect to my late 2009 iMac with ...
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1answer
649 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 ...
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555 views

Arduino + HM-10/11 + ANCS to get notifications for iPhone

I am wondering if there are any current solution to receive notifications on iPhone through ANCS and HM-10/11 Bluetooth LE module. An Arduino library? https://stackoverflow.com/questions/28488529/is-...
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79 views

Issue with Visual Studio not seeing arduino boards

Below is a screenshot. I used Visual Studio with the Visual Micro [arduino extension] a few months back. I switched computers and installed Visual Studio on the new one but for some reason after ...
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377 views

Having trouble connect nrf24l01 to arduino micro and arduino uno!

I'm trying to connect a nRF24L01 with my Arduino Micro and Arduino Uno. The Arduino Uno works fine, but it doesn't talk with the Arduino Micro. CE is on pin 7 and CSN on pin 8. I posted the code down ...
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594 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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79 views

Maplin Bluetooth Shield for Arduino - BAUD rate

I am currently using a Bluetooth shield which i bought from maplin, see: http://www.maplin.co.uk/p/bluetooth-shield-for-arduino-n97dg. I have got it to work perfectly on the default 38400 BAUD , but ...
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262 views

Adding a kill switch for servos with states - blink without delay code

I have many LEDs and two servos connected to one Arduino Uno, and the servos are programmed to move randomly indefinitely. However, I would like to install a kill switch for the servos by reading a ...
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146 views

Arduino code not starting at beginning after poweroff

I created a few Arduino-XBee temperature sensor nodes that send data to another XBee node.js server. I'm running into a few issues trying to write a function to initiate a handshake and receive an ...
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250 views

I2C between Yun Shield (Dragino) and UNO R3 problem

I am having problems with I2C communications between my Dragino Yun and an Arduino UNO R3. I can have the Dragino request data (using Wire.onRequest on UNO) from the UNO and it works great, however, ...
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21 views

No connection with XBee radios on Arduino board

I have two Arduino boards which I've attached XBee radio boards to. One is to send data via Serial.write(num), where num is an integer. The other is receiving that integer via Serial.read. However, ...
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84 views

Determining if an LED on another device is on

I'd like to check if this circuit I'm making is correct -- I'm concerned I'll mess up my Arduino. Essentially, I would like to determine if an LED on another device is on or not by measuring the ...
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500 views

How to attach Arduino MKR1000 to a shield meant for Arduino UNO?

I have an Arduino MKR1000 and need to interface it to an Adafruit Music Maker shield, which has pinouts for an Arduino UNO. Maybe I'll have to attach female headers, and then jumper pins over. Which ...
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133 views

Using VMA-02 / KA-02 Sound Shield to get line-in input on arduino

I bought this VMA-02 audio shield: http://www.velleman.co.uk/contents/en-uk/p623_vma02.html I want it to get the data from line-in to line-out but with reading it in my arduino scetch first (e.g. ...
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626 views

Transforming from analog output to speed and acceleration with gy-61

Maybe it's a simple question but I'm unable to get what I need. My task is this: Get the acceleration and speed of each axis of the accelerometer. I thought of something like: const int VCCPin = ...
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299 views

SIM900 module not responding on hardware COM port

I've got my sim900 module working with arduino by using their software serial library, however, I want to eliminate arduino from the equation and have serial communication directly to sim900 module. ...
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332 views

DHT22: Library and Data accuracy

I am using DHT22 temperature/humidity sensor and I noticed that there exist so many libraries. I wonder which one is the most accurate? It is giving me readings that does not seem to be logic. High ...
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50 views

Arduino connection confirmation

I am using Arduino Uno. I want to control my room lamp both manually and over the network, so when I switch off my lamp manually, how do I get acknowledgement over the network that lamp is off ?
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53 views

Arduino clone changing its serial port on slight physical displacement, even during an ongoing serial communication

I'm using an Arduino clone for serial communication. However, as soon as I even touch the board, it resets, and the serial communication stops. When I view the serial port using the 'Tools' menu of ...
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239 views

Cannot read NTAG203 with MFRC522

I tried regular RFID tags and It works but when I tried NTAG203 it won't detect. P.S. I used the code "dump_data" example of MFRC library.
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237 views

trying to discover other nrf24 modules

Today I started messing with the idea of getting an arduino uno to autoconnect with another arduino uno using the nrf24l01 breakouts. I dont have a particular goal in mind per se but was just wanting ...
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744 views

Serial clock for SPI

I'm trying to configure my ADC(LM98725) registers through Arduino UNO via SPI but I'm facing a small problem, it would be great if somebody help me out. I have to configure my 16 bit ADC registers ...
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69 views

initial power output in the digital io pins of an Arduino controller

I am a newbie.. I am integrating Arduino controller with Matlab I have connected my arduino DUE board in COM7. And I have also connected a DC Motor in one of the digital output pins (D3) So when I ...
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1k views

Modbus Protocol RTU

I have simple code working on Serial Communication asn below. With Same data i would impliment Modbus protocol> I have Used Modbus library for arduino earlier which works fine with 9600 baudrate and ...
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69 views

Serial Request error

I am working on arduino Uno board.I am trying to send request Serially from out Side using docklight.I am sending COmmand is request send every 5S to 10S and get response.When i tested this code with ...
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289 views

Is my HC-05 broken?

I have an HC-05 wired with an Uno, and am using a sketch to control the HC-05 AT mode and send AT commands, per a variant of this instructable: DIY Arduino Bluetooth Programming Shield The error I ...
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732 views

I am not able to compile,libraries missing

this was the error message Arduino: 1.6.7 (Windows 7), Board: "Arduino/Genuino Uno" Sketch uses 1,068 bytes (3%) of program storage space. Maximum is 32,256 bytes. Global variables use 11 bytes (0%) ...
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Programming an Arduino over the air using an ESP8266

This question stems from this article (Originally in Spanish/English) which Hack a Day summarizes (Includes link to partial English translation). These articles show that it is possible to update an ...
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550 views

Controlling dynamixel AX12 by Arduino

Actually, i would like to control 12 motors of AX-12 using Arduino .. I could control just 2 motors. However when i send a command to the 12 motors they don't move and one or 2 of them move randomly!...
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85 views

How to deal with launch4j error

It seems that the last several times I've tried to open Arduino IDE I've encountered an error that says Launch4j, "an error occurred while starting the application". It takes some time before that ...
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1k views

SimpleSDaudio giving a lot of static from speaker

I'm using SimpleSDaudio (http://www.hackerspace-ffm.de/wiki/index.php?title=SimpleSDAudio) to play wav files. The connections are as follows: MISO pin 12 SCK pin 13 SS pin 4 MOSI pin 11 Speaker ...
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2k views

How do I display serial monitor on LCD keypad shield?

I want to be able to display what I am seeing on the serial monitor onto the LCD keypad shield I have connected to my Arduino UNO. Can someone possibly write the the code ontop of this for me? I'm ...
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114 views

Matlab Arduino Multi Byte Read

I'm using Matlab to communicate with a custom AD7746 board through an Arduino UNO. The data sheet mentions that "In continuous conversion mode, the address pointers’ autoincrementer should be used ...
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59 views

Motor shield and sensors

While making a Arduino programmed maze runner Will bipolar motor shield be more beneficial than using tb6612fng motor shield???? Also which type of sensors will be better??
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98 views

How to get power for a nexus 7 while reading serial data from an arduino over usb?

Does anyone know how to simultaneously power a Nexus 7 tablet while simultaneously reading serial data from an arduino over USB? I have had quite some trouble with this and have attempted multiple ...
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140 views

Getting NaN error in Processing when Xbee is used and trying to create a popup window.

I am trying to get data from D6T Omron thermal sensor. It works fine with both Arduino and Processing when I connect it to pc directly. However, it seems to always cannot read my last data in my data ...
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316 views

WebClientRepeating not printing response to Serial

I'm following the tutorial in WebClientRepeating and it says that "The content of the page is viewable through your Arduino's serial window." However the output in my Serial window is just saying "...
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134 views

How can I read also the temperature with this GSR sensor?

Considering the GSR is the inverse of the Resistance, if I know the resistance and how much it increases for every celsius degree, the game would be done. Here's how my code looks like at the moment: ...
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636 views

Problem related to Arduino ip address

Can anyone explain to me why my output ip is: 15.16.17.18? I configured my addresses as follows: Arduino : gateway 192.168.1.1 ipaddress 192.168.1.8 subnet 255.255.255.0 My local network: gateway ...

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