Unanswered Questions
7
votes
1answer
251 views
SPI arduino due conflict with pinMode(), bug?
Consider the following minimal example, where I set pinMode before calling SPI functions:
#include <SPI.h>
void setup()
{
pinMode(10, OUTPUT);
SPI.begin(10);
...
7
votes
2answers
269 views
RFID/NFC (13.56 MHz), is it possible to send raw bytes and receive response?
I'm trying to implement a card reader (i.e. credit cards) for shopping purposes, and AFAIK those cards are ISO 14443-A compliant (Mifare Classic 1K). I already made an Android app that can send custom ...
5
votes
3answers
2k views
Sainsmart LCD 2004 - LiquidCrytal_I2C library issue unable to compile
I bought a Sainsmart LCD2004 from Amazon to use with my Arduino Uno.
I understand that since this LCD uses I2C a new library needs to be downloaded.
From the sainsmart website I dowloaded the LCD ...
4
votes
0answers
123 views
How to solve Atmega 16A Serial write (println) hang with Arduino Uno firmware?
For doing some experiments I bootloaded an Atmega16a with Arduino Uno. I am powering my Atmega16a from Arduino UNO. I am not using any external clock. Atmega16a is connected to a breadboard. For ...
4
votes
1answer
133 views
Level tracking using optical or capacitance sensors
I am looking to devise a level tracking system using arduino and some sensors. My particular situation is I have solute that is coming out of solution and I want to track the formation rate of the ...
4
votes
1answer
241 views
Arduino Digital Input Causing Output Problems
I am working on a simple project using an Arduino Mega 2560 that involves reading a 12-bit binary encoder signal and which is used to cycle a digital pin high and low (depending on the angular ...
3
votes
1answer
68 views
Does SMS format depend on the sender's mobile?
I want to read the SMS using Arduino and GSM module, I want to perform conditional programming based on the received SMS.
What I found really interesting is SMS format is different if I send message ...
3
votes
1answer
84 views
Asynchronous control framework
Can anyone recommend an Arduino-based asynchronous scheduling library for controlling a small mobile robot?
I'm writing the control code for a small 2-wheeled Arduino-Uno based robot. It has a few ...
2
votes
0answers
19 views
How to use the additional SPIs on Arduino Due
According to the following image it is possible to use a second SPI bus on the Arduino Due by using Serial1 and SCL1 as SCK0 for SPI (or Serial2 and SCK1).
source
However I did not find the code ...
2
votes
1answer
82 views
Printing SD card file contents on LCD
This is a part of my program which reads data from file stored in SD card and displays that on an LCD screen.
File dataFile = SD.open("1165.txt");
if (dataFile) {
Serial.println("File ...
2
votes
3answers
134 views
Storing and parsing data with Arduino
I use Ethernet Shield and Arduino to GET data from the server in JSON format. Request looks like this:
client.println("GET http://ramp.local/api/actions?");
The response I get is:
...
2
votes
2answers
154 views
RTC and SD works separately but not together
I am running small project. I wanted to use Arduino Mega 2560 v3, PIR sensor, microSD card module and RTC1307 module, some leds, buttons and buzzer. To enable and disable motion detection and when ...
2
votes
0answers
120 views
How to add the Wiring S board to Arduino IDE v.1.6.2?
My Arduino Uno is running out of memory to support my script (yes, I've tried several ways of optimize it already: PROGMEM, EEPROM, no Strings, and so on), so I would like to upload my script to my ...
2
votes
2answers
1k views
Control Speed of DC FAN Using Arduino PID Library
I want to make a circuit that control speed of DC fan Using Arduino PID Library to get thing at specific temperature.
The circuit looks like this but can be changed, The dc fan motor connected to ...
2
votes
0answers
113 views
Wiring Lilypad USB + ESP8266 Serial WiFi Module
I am trying to solve the following scenario:
Lilypad USB connected to WIFI through ESP8266 Serial WiFi Module.
http://arduino.cc/en/pmwiki.php?n=Main/ArduinoBoardLilyPadUSB
...
