Questions tagged [shields]

Shields are attachments that "snap" onto the Arduino board adding functionality. They are usually the same shape as an Uno/Leonardo/Duemilanove. Some examples are: the Ethernet (includes SD port) shield, motor shields, and sensor shields.

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What is the advantage of using a 4-20mA shield rather than directly measuring the voltage drop?

I would like to measure a sensor which uses a 4-20mA current output. The easiest way would be to set the voltage drop to around 5V using a 250 ohm resistor and measure the voltage using the analog pin....
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19 views

Any possible way to stack Motor Driver shield L293D with Xbee Shield v03 on arduino?

So i am trying to stack these two shield on arduino, now the problem here is that i guess there is a conflict between the pins of arduino being used by both shields, so can anyone suggest a solution?
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28 views

Can an Arduino Pro Mini interface with a full-sized WiFi shield?

We have an Arduino Pro Mini on a breadboard connected to a 9V battery and a sensor, reading data. We also have a full-sized Adafruit WINC1500 WiFi Shield with PCB Antenna. I would like to know if they ...
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56 views

Is there an alternative to soldering to connect boards?

I know that shields are usually soldered to headers so they can be attached to the board with the Arduino. I have a tremor, which makes soldering impossible. Are there ways of connecting PCBs without ...
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60 views

Power supply while using a shield

Sorry if this is a dumb question, I'm new to Arduinos. I'm planning to use a MOVI voice shield with SparkFun's RedBoard Turbo (3.3v). The RedBoard Turbo requires a power supply under 6VDC, but the ...
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47 views

Help with Bluetooth shield

Hey guys I have this Bluetooth shield Does anybody know how I can get it to connect to Arduino? I can't find any guides on it. I have this serial program that I want to use to turn on a led. but ...
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25 views

Voice Recognition and then read CSV

BLUF: Is it possible to use a shield to recognize a voice command like a name, then look for that name and info in a CSV file and then store certain info as variables to then actuate something? ...
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137 views

Shield SIM808 EVB V3.2 charge a Lithium battery?

hello friends do you know if, can this shield (SIM808 EVB V3.2) charge a lithium battery directly or i need additional hardware?, I know that module has conection for battery but it can charge it?
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Sending data to ThingSpeak with esp13 shield [duplicate]

Well, I am trying make a project which is reading motor RPM sending to ThingSpeak. with this I am planning to check my motors speed at home. I can made it with esp8266 modul but I saw original ...
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40 views

Arduino Uno Issue with SIM900 Network registration

I have a SIM900 module on which I have a T-Mobile Data Only SIM card (pin unlocked). I am powering on the SIM900 module using a power adapter which can supply voltages 4.5, 5, 6 7,5 and 9 V and 2.1A. ...
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67 views

Arduino IDE 1.8.8 built in 1.2.1 Temboo Library?

I am weirded about the built-in "latest Temboo library" with the latest Arduino IDE; when a previous older code says to download the latest Temboo version < 2? (which I found this: https://temboo....
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341 views

Error code board and boards.txt? Formatting error? cannot verify alarm.txt or any

Arduino: 1.8.8 (Windows 10), Board: "Arduino/Genuino Uno" Error reading file (E:\arduino\arduino-1.8.8\hardware\arduino\avr**\boards.txt:0**): Invalid line format, should be 'key=value' Error ...
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52 views

What is the typical form for a finished Arduino project?

I just started with Arduino. I am an experienced software developer so the programming side was already mostly known to me, and I am surprised at just how easy Arduino have made the hardware side of ...
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3answers
76 views

NEED Help With Servo motor

I have just bought a MG90s tower pro servo for my school project and there is a problem. As soon as I connect my servo to the cnc shield or directly arduino, the whole arduino board turns off. I ...
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45 views

Problem with MP3 Shield and function calling combination

I wrote this code to control my Christmas tree. It plays the Holy Night Code perfectly but never transitions to the next song. In addition, it plays random notes after the song is finished. Does ...
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1answer
80 views

Error with Sparkfun MP3 Shield and Arduino Due playing music files

The code worked on my Ardino Uno. I plugged it up the exact same way and am now getting an error. Here is the error I get when I try to upload my code to the due: Arduino: 1.8.5 (Windows 10), Board: ...
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134 views

Random characters generated by LCD during serial.read()

I am using the following codes to print characters on LCD display.... #include <LiquidCrystal.h> const int rs = 8, en = 9, d0 = 4, d1 = 5, d2 = 6, d3 = 7; LiquidCrystal lcd(rs, en, d0, d1, d2, ...
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152 views

How to write a script if water sensor comes into contact with water for more than 2 mins and LED lights up

I am a newbie to arduino and programming. I would like to come out with a code for water sensor to detect the presence of water for more than 2mins before lighting up the LED lightbulb. Currently ...
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2answers
277 views

arduino usb host shield and sd card [closed]

when I use the sd card on the mega or the arduino uno it works. Everything is fine. However, when I use it in combination with the USB shield host it doesn't work. I know the usb shield host works ...
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1answer
125 views

Are there any Wi-Fi modules for the Arduino Uno that may connect to an external Wi-Fi Antenna?

I have an Arduino Uno I need to connect to Wi-Fi to make HTTP POST Requests to a Raspberry Pi Web Server. The Arduino is located only about 30 feet from the AP, but there is a brick wall in the line ...
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1answer
75 views

Playing MP3 Shield tracks

I have an MP3 shield on a Arduino Uno. When using "File Player" I can get the tracks to play by keyboard entry with three digits (001-009). The problem is that I want to use (SFEMP3Shield > examples >...
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82 views

How do you use the plastic cover/case that came with Arduino?

They have holes for screw on, on top of the holes on the Arduino itself. Where can I find parts that are compatible with this case/cover? What was the intended use of this case/cover? Thanks.
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471 views

PCA9685 servo shield not working

Im working on a project where I want to connect 32 servos together. I got: -Arduino uno -2 PCA9685 16-Channel 12-bit PWM/Servo Shield -power supply 5v 10 A -All wiring is to the right pins (I have ...
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2answers
93 views

Stacking 3 of the same shields on top of each other and instructing them in sync

Context: I have an audio track separated into individual channels grouped by frequency and speaker location. I need to play all three of these channels simultaneously and perform instructions like ...
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4answers
173 views

Can you help me trim my code?

First of all I want to be clear, I'm not very skilled in programming methods, all the C I learned was for various Arduino projects. That being said, I just finished a project that reads some data ...
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32 views

Ethernet socket impedes adding shields

I just bought a KEYESTUDIO W5500 Ethernet Arduino without realizing that the Ethernet socket on the board impedes adding any additional shields to the device because: Horizontally the socket runs ...
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1answer
47 views

How to determine hardware/software compatibility? [closed]

Currently, I'm using Greiman's SdFat Library with Adafruit's Data logging Shield. I'm thinking about switching to the Adafruit micro SD Card Breakout. I imagine that it will work as both products ...
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1answer
140 views

USB host shield help [closed]

Hello, I apologise for being such a noob but can someone help with this. I am having trouble working with this. When I insert the arduino's pins into my new usb host shield , there is no indication ...
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58 views

Press button and Send Message Error

The problem is that sometime I don't even need to press the button and it sent message and keep on sending continuously. What I want to do is that once the button is pressed, sent 1 message. I ...
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1answer
63 views

Connecting CAT5 robustly between portable Arduino and more portable sensors

Newbie wiring question. I’m building a lightwand of some sort, involving an RGB LED and a few pushbuttons that I want to wave around (the “remote”), while staying connected over ~0.5 - 3m to an Uno (...
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48 views

Can I make my own TFT LCD shield? [duplicate]

I have a few TFT LCD displays lying around which I salvaged from old phones. I would really like to use them with my Arduino. I didn't get anything about making a shield on the net but only links to ...
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1answer
162 views

My shield does not have further female headers? How do I stack more shields?

I purchased a motor shield (L293D) and it doesn't have the female header which I can connect to another shield. What can I do to stack up more shields? For being more specific I ordered my shield from ...
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1answer
2k views

Send SMS Arduino Uno + SIM900A shield

I am working on a module to send messages. I write the message on the serial monitor + phone number and I have to send the message to the line. Question: How to send messages through the SIM900A ...
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2answers
125 views

Elechouse Mo3 Shield Play Random Song

using this code to try and play a random song when someone walks by my distance sensor I get an error, the same song(track 0001) plays every time. Any advice? #include <SoftwareSerial.h> ...
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179 views

Play a single sound using music shield

I am working on a music shield, I want to play a sound when a sensor triggers (it is very noob I know) well The music shield manufacturer provides a simple class named MusicPlayer here you can find ...
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2answers
196 views

Powering Arduino Uno and Ardumoto Motor Driver Shield

I need to power an Ardumoto Shield to drive two 12V DC motors. I was planning to connect a 12V battery to the Max 18V input on the Ardumoto and a 9V battery to the barrel jack input of the Arduino Uno....
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1answer
491 views

Communication over UDP between Dues with Arduino WiFi Shield

I'm using the Arduino WiFi Shield to make two Arduinos Due communicate using UDP. The first node to send a message (the Client) doesn't always receive a reply from the other node (the Server). The ...
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1answer
245 views

Why is GsmScanNetworks not working?

I'm using an Arduino UNO with an Arduino GSM Shield 2 with Integrated Antenna A000105. However, when I try to upload the code, in the serial monitor it tells me my IMEI is 0 and signal strength is 0 ...
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2answers
916 views

Uno r3 - Can't get USB Keyboards to work with an USB Host Shield

I'm a day 1 beginner to Arduino, and I am trying to obtain input from a USB keyboard. I've connected the USB keyboard to an Arduino USB host shield attached to an Arduino Uno r3, and I am using the ...
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1answer
30 views

ledkeypad shield not responsive

I recently purchased several of the DFRobot ledkeypad shields: https://www.dfrobot.com/product-1407.html I have Arduino Leonardo (which also had some problems in the beginning, being recognized as ...
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1answer
79 views

Xbee shield to shield connection sends but not receives correctly

Setup: 2XArduino Uno 2x XBees S1 2x Sparkfun xbee shields. My first arduino reads in values from a photoresistor and sends the values to the second arduino. I know for sure the arduino is sending ...
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0answers
157 views

Sparkfun Spectrum Analyzer: Problems with frequency bands

I bought around 2 years ago the Spectrum Analyzer Shield from Sparkfun, but I never had the time to do something with it. Recently I found the time to start a project to build a graphical equalizer. ...
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1answer
46 views

Help! My motors are not working!

I have made a project using Arduino, 3 LDRs and a L293D motor driver shield. My project was that when I block light from the first LDR, the motor will spin. When I block light from the second LDR, the ...
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372 views

Arduino external 5V power supply

I'm designing a shield for the Arduino Uno with some sensors that require +5V, +3V3 and +3V Vdd. I want to power everything with a single DC adapter so I have a voltage regulator that converts the DC ...
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1answer
387 views

Arduino Mega Wifi Shield Timeout Error

I got an Arduino Mega(not original) and also a Wifi shield, when ever I try to upload my code to it, I get this error: Sketch uses 5504 bytes (2%) of program storage space. Maximum is 253952 bytes. ...
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1answer
188 views

Problem with Arduino Uno and SIM900 shield logical communication (rx & tx)

The logical communication(rx & tx) between the shield and Arduino Uno doesn't work. Arduino (rx & tx) supply is 0 & 5 V but this is 0 & 2.8 V. What am I to do?
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2answers
839 views

Switching between SPI Devices when one is an SD card

I'm using a USB Barcode scanner connected via a USB shield, I'm able to get the readings from the barcode using this example, After getting this readings, I'd like to save it to an SD card but the SD ...
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101 views

No Socket Available message floods serial monitor

Serial Monitor get's flooded with "No Socket Available" message. This seems to occur even before I Try to communicate with my Hue bridge through my hub port. Does anyone see why this is occurring ...
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1answer
214 views

Wireless Shield Not being detected w/ Arduino Uno R3

Wireless Shield is not being detected by arduino, not MAC address is displaying. Not sure what to try next, there is nothing noticeably wrong with the shield at first glance. Green LED under status ...
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1answer
351 views

LEDs on Arduino WiFi Shield

I would like to know the purpose of the LEDs on top of the Arduino WiFi Shield: L9/Link/Error/Data (left in the picture). What do they indicate?