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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Best 2a stepper motor driver for Arduino Uno

What is the simplest (from a user/install standpoint) 2a stepper motor driver for an Arduino Uno? I would like something simple and easy to stack like the Adafruit Motor/Stepper/Servo Shield for ...
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983 views

Error in modification on MPU6050_DMP6

I made modifications on the original code of DMP6 MPU6050 to make it as I want. I took the standard libraries with it and they are helper_3dmath.h, MPU6050.cpp, MPU6050.h, MPU6050_6Axis_MotionApps20.h,...
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276 views

Sparkfun MicroSD shield cannot open log file

I'm currently trying to log data from a GPS shield onto a microSD card using a Sparkfun microSD shield. All my code will compile, but when I open the serial monitor the microSD will initialize, but ...
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Using arduino shield seems to break serial.print and uploading new code?

Hello Stack Exchange Community! For an arduino project I am working on, I modify the SparkFun 6 Degrees of Freedom IMU Digital Combo Board - ITG3200/ADXL345 to support DSSCircuit's I2C Master Library ...
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278 views

Unable to read any SMS's other than the first SMS using SIM908 shield

I'm using two SIM908 shields to communicate with each other. One of the shields will be connected to a sensor and it should send values contentiously to the second SIM908 (receiver). I'm facing a ...
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612 views

Arduino Uno - Firmata/Serial Communication in Visual Studio C++

I need to pass std::vector <double> values from a C++ console program (written in Visual Studio 2015) running on a PC to Arduino in real-time using USB serial communication. Can anyone of you ...
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49 views

Flexiforce to Uno to Keyboard. Working but not as inteded

I have a Flexiforce 25 pound pressure sensors connected to my Arduino Uno which connects to my laptop. My requirement is to be able to play video games using taps on pressure sensors. I am ...
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2k views

Reading from ps2 barcode scanner

I am trying to read from a ps2 barcode scanner (Datalogic gryphon D). The Arduino is powered by the USB. The circuit is shown below The pinout of the ps2 is I have used the fritzing pin assignments ...
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2k views

MPU6050, Bluetooth — FIFO Overflow and Breakdown

I am quite new to all the arduino stuff and right now I am struggling with a Problem that seems to be easy, but I have honestly no idea how to deal with it. I would like to read the data from a ...
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1k views

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 ...
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49 views

arduino serial comminucation

my vb.net app produce this result as 2d array : 01110000000111000 01110000000111000 01110000000000000 01110111000111000 01111111100111000 01110011100111000 01110011100111000 01110011100111000 ...
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108 views

Teensy and MS5803 sensor

I'm trying to use the MS5803 pressure sensor with a Teensy 3.2. Compiling the Sparkfun, or other, libraries, however, results in no output. Can you provide guidance on how to modify the libraries to ...
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69 views

Intercept Data being sent to XBee Module via UNO

An XBee Pro S1 module sits on a DIP socket on-board a Personal Weather Station (PWS) to transmit data. Instead of letting the station transmit data wirelessly via the XBee, I would like to read that ...
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23 views

what is the fastest shield to add to the sparkfun v3.2 Arduino Uno that will enable me to playback and record hour of short audio dictation

I have almost no eexperience building electronic kits. I just buoght and began tinkering with sparkfun 3.2 and want to adapt its simon sketch to real audio files What isis theeasiest to assemble add ...
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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 ...
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58 views

How to reset Arduino Uno over BLE?

I'm working on wireless uploader for Arduino over BLE. I've managed to make it working for Arduino Mega 2560 using GPIO and HM-10 AT commands to control GPIO pins. I'm using pretty the same schematics ...
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117 views

Creating a keypad matrix that will communicate wirelessly with an Arduino Uno

I have a 30 button matrix and I would like to use a keyboard encoder to decipher what button was pressed. I would like that information (what button was pressed) to be wirelessly sent to my arduino ...
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144 views

Basic communication between Cotek and Arduino UNO

I am trying to get a reading from my Cotek through my Arduino and have it display on an LCD screen. When I run the code, though, nothing shows up. I am EXTREMELY new to using pretty much all this ...
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516 views

SIM 900 stop after 1'5 hours; what's wrong?

I have a Gboard module (from Itead) configured to recieve data from Xbee sensors, and log data to a server DB on inet (via GPRS). This module is programmed with Arduino IDE. I turn on the module (...
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141 views

Arduino with NFC: Garbled Serial Monitor

I started working on a small programming project just for fun and I have got stuck. I have been using the following tutorial to make an Amiibo Music Box Now using the libraries the tutorial suggested,...
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1k views

Function to send SMS in PDU format

I'm trying to send SMS using Arduino Uno v3 and Sony Ericsson K700i. I have a function that converts a text and a number to pdu format but I'm unable to deliver the message. I don't get any error ...
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183 views

Arduino Mini Pro 3.3 V Issue with Bluetooth Mate

I have an Arduino Mini Pro 3.3 V powered from a coin cell(3.6 V, CR2450) and connected to Bluetooth Mate Gold. I have checked the connections and they are fine. I can also connect to the bluetooth ...
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279 views

CH340: right endpoint?

I'm working on implementing CH340 drivers used by cheap Arduino clones on Android (Linux). What endpoints should be used as read endpoint since two endpoints have IN flag - 0x81 and 0x82? http://...
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116 views

Arduino not responding while trying to flash over BLE

I'm working on wireless uploader for Arduino from iOS devices. I'm using HM-10 BLE module which seems to work ok. PIO 2 is used as DTR for resetting (see A [0x41] T [0x54] + [0x2B] P [0x50] I [0x49] O ...
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2k views

How to reverse BLDC motor using programming arduino?

I bought ESC from here but it rotates motor in one direction only. Is there any program which will control direction of rotation clockwise or anticlockwise with same wire configuration.
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1k views

PS4 controller too touchy on the arduino RC car i built

I recently built an RC car from scratch and I am using a PS4 controller to control it. I have an ESC of course but my problem is I barely touch the joystick and the motor is going so fast I cannot ...
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180 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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180 views

sim 900 sending wrong sms -“ Ü ” to mobile phone from arduino

i am having a problem while sending sms from arduino to a specific number. cell phone getting sms but every time it gets same unicode -" Ü " . plz help us //-------------------------- #include <...
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493 views

Control air conditioner using Arduino

I followed a couple tutorial on how to receive and send IR codes to control air conditioner the receiving part is working fine and I copied the IR data of the remote control but the problem I am ...
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1k views

EB - 4x4 Soft Keypad Driver Diagram from Makerstudio needed

I have found this interesting device wile looking for a cheap Arduino. It's a "driver" that converts a 4x4 Keyboard 8-PIN (8-IO) to a 4-Pin (2-IO) Device I would like to know if is Achieved by a ...
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135 views

Rf receiver, change timer

I need some help. I use function rx_setup() оf library VirtualWire.h which is used to transmit information wirelessly. The function use timer аnd there is conflict with any of the other libraries. ...
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374 views

How to effectively modify a library to be able to function with Mozzi Library?

I have sketch that runs almost exactly as I would want it to. Now I am trying to add sound to it using the Mozzi Library instead of just using the tone function. This way I can avoid having to put a ...
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266 views

Problems when communicating with SD card using ethernet shield

I am using the "SD read/write" code from the Arduino IDE examples to test an ethernet shield (clone). The problem is that although a file is created no data is stored in it. When running the serial ...
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843 views

Arduino Uno R3 L(yellow) led stays on and error on upload

So I recently got an Arduino Uno R3. Installed the IDE and drivers under Windows 8.1 and everything seemed to work fine and received the 'Done uploading' message when goofing around with the Blink ...
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461 views

reading from an array and writing into a servomotor

I have an Arduino Uno. I am trying to write a code that reads a command and according to that command it saves angles into an array or writes the angles of the array into a servomotor. I am facing ...
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557 views

Arduino uno RF transmitter and receiver, MYSQL

i tried to connect my arduino uno and ethernet shield with Mysql and everything works fine. Then I tried to connect the RF transmitter and receiver. I use a similar code, but i have problem with ...
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63 views

TX light not flashing, screen.print works sometimes.. UNO

I've got 2 Analog accelerometers and a Gyro/Acc/Mag connected to my arduino and it's been working and reading fine until a few hours ago. I've got the arduino sending data over the serial connection ...
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514 views

Merging two codes, one for speaker one for LCD clock (Arduino Uno)

I have two different codes. The first one makes a LCD screen count the time and print it, then when one of the buttons on the LCD shield itself is pressed, it prints the time on the top line that it ...
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1k views

DC Motor speed control by using pwm

I am using Arduino Uno, and MPU6050(3 axis imu sensors), not gate, and L298 dc motor drive. My algorithm is very easy. Receive an angle how the balancing robot is tilt. Decision speed of motors by ...
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254 views

Issue with Embedded Coder Target for Arduino

I am using the embedded coder target for arduino following this: (http://www.mathworks.com/matlabcentral/fileexchange/30277-embedded-coder-target-for-arduino). I am having problem while running the ...
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145 views

I2C with an arduino, a PI and an IO expander

im working on a project which requires alo i/o pins. For that reason i bought a pcf8574P 8bit I/O expander which uses the I2C protocol. The problem is how to combine the Rasp PI and the arduino. For ...
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783 views

send SMS for 1 time with arduino GPRS SIM900 if an iput is HIGH (4 Digi inputs)

I faced a problem to send 1 SMS if an input is HIGH,and if it is LOW==> no SMS to send,if LOW to HIGH==> send 1 SMS. this code not working,just sent SMS when I turn the GPRS on,and after nothing is ...
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1answer
1k views

How do I use I2C from an Arduino Uno when I have a GSM shield mounted?

This may be an extremely obvious question but I don't seem able to find a definitive answer. I have an Arduino Uno and a Sim900 GPRS/GSM shield fitted on top of it. I had I2C working on the Arduino ...
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Which Timer can I use to control a servo with Arduino Uno

I would like to control 2 motors using Timer2 @ 200Hz. The frequency of the timer is printed in the main loop every second. I'm using an Arduino Uno with two interrupt used for the encoders connected ...
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1k views

Several XBee End devices sending simultaneously; Only one packet recieved on coordinator

I'm trying to configure a Zigbee sensor network. My "gateway (coordinator)" and "End devices" are made with XBeePro S2B model and configured in API mode "2". The "gateway (coordinator)" also has a ...
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128 views

RFID library issue

I am having some strange issue. I am using Linkit One board, which is a based on Arduino. I am using rfid reader RC522 which is cheapest and most common. I cant get its official library get it ...
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1k views

Arduino Program for Olimex ekg/emg shield to detect heart rate in bpm as well as show ECG in ElecGuru software

The manual of olimex ekg/emg shield provides a link for ShieldEkgEmgDemo code, it can show ecg in realtime in a software ElecGuru. The link to software is also provided in the manual. I need to get ...
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0answers
991 views

Analog Input not going to Zero

Arduino Uno user here I am building a project with 4 analog inputs A0 dose not work. A1 A2 and A3 work perfectly fine! But for last input when I connect to A4 or A5, then they do not go to zero. They ...
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398 views

Can I use an Arduino and GSM breakout board for triangulation?

IS there a way for me to use cell towers to triangulate my location with an Arduino Uno and GSM breakout board? if so how?
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289 views

DFRobot Bluno + Relay Shield

I'm a new to all things electronics and I'm having trouble using a DFRobot Bluno V2 with a DFRobot Relay Shield for Arduino V2.1. For testing purposes I've done the exact same circuit as represented ...

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