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Top new questions this week:

What does an arduino sketch translate to before compilation?

I've been experimenting with Arduino on both esp8266 and AVR chips. The structure of the .ino file usually looks like this: #include "Arduino.h" #include "ESP8266WiFi.h" ##Some includes void setup() ...

avr esp8266

asked by TheMeaningfulEngineer 4 votes answered by Tom Carpenter 6 votes

Confusion in the use of byte variable

A byte stores an 8-bit unsigned number, from 0 to 255. I can understand the following line: byte b = B10010; // "B" is the binary formatter (B10010 = 18 decimal) But I also saw a use such as: ...

variables

asked by don carlos 2 votes answered by Steve Kemp 4 votes

Which Arduino is the most suitable for my project?

I've started to prototype something using an Arduino Mega and Yún Shield. It's simple. It reads an ADC at 50Hz and sends data to a server through a socket. But because of that combination, I need to ...

arduino-mega arduino-yun python

asked by Jonathan Anctil 2 votes answered by FauChristian 5 votes

How to on/off light dimmer using another pin?

In recent project, I'm working with light dimmer. Let me explain with example of fan. In switch board, we have a fan switch which can able to ON/OFF our fan & FAN REGULATOR which vary speed of ...

arduino-uno programming arduino-ide

asked by Hasan 2 votes answered by Hasan 0 votes

'content' is not captured

I try to make a variable that can be modified from the server, using and ESP8266. #include <ESP8266WiFi.h> #include <WiFiClient.h> #include <ESP8266WebServer.h> #include ...

c++ esp8266 web-server variables

asked by Mihai Barbu 1 vote answered by Nick Gammon 1 vote

Strange characters after typing an AT command in serial monitor

I'm trying to test AT commands (I am working with an Arduino Uno and a GSM/GPRS SIM900 shield; my system is ubuntu 14.10) . Yesterday when I was testing , all ran well.. For example after typing ...

arduino-uno gsm softwareserial

asked by EL General 1 vote answered by EL General 0 votes

Mains-Frequency Clock Library

I have an arduino thing, and the hardware I plan to connect to it (a triac zero-crossing based dimmer) provides a synchronization signal from the mains power phase it connects to. Main power does of ...

library time

asked by AJMansfield 1 vote answered by Majenko 0 votes

Greatest hits from previous weeks:

Code for one-time execution in Arduino

Question: Where do I put code if I want it to execute only once per Arduino startup? Background: I tend to use my Arduino to perform tasks that should be executed once per power cycle. (For example, ...

programming

asked by apnorton 8 votes answered by Connor Wolf 10 votes

Unable to upload to Arduino Due using 1.6.8 of SAM tools; bossac.exe throwing an error

I can successfully see the Arudino Due when I plug it in, I can compile the code, but when I attempt to upload it to the board I get the following error: ...

arduino-due

asked by Tim 1 vote answered by Tim 2 votes

Can you answer these?

FreeRTOS Implementation on Arduino

I am trying to make an RGB LED with Fan Controller for PCs. It is an Open Sourced project. But I want to implement RTOS using this implementation of it as a function in it, namely rollColor(), takes a ...

arduino-uno library timers

asked by echo_salik 1 vote

How do I fix the serial loader on my Pro Mini?

I have an Arduino Pro Mini, 3v3, 8Mhz. I have in the past successfully programmed it over the serial line. I have two others, I can program them over the serial line. I can program the first one using ...

serial bootloader uploading

asked by RichieACC 1 vote

Pattern detection in sensor data

I'm using a heart rate sensor along with an Arduino for a project of mine. I have to determine whether the heartbeat is following a particular pattern (eg: when when heartbeat regularizes a lot after ...

arduino-uno sensors arduino-ide datalogging

asked by Sumanth 1 vote