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Top new questions this week:

Whats the function of the resistor between MCU and its Resonator in Arduino Mega?

I was looking Arduino Mega's schematic and I noticed a resistor between the MCU and its resonator. R3 in this image: Why is it there and what is its function?

arduino-mega

asked by Wesley Lee 6 votes answered by John Taylor 3 votes

Collection of functions for arduino IDE

I am having troubles creating a collection of functions to be used in Arduino sketches and libraries. What I want is not a class, but simply a group of functions which do not require an object to be ...

library ide

asked by tomph 5 votes answered by Majenko 6 votes

Powering Arduino with reverse car lights?

I'd like to build a reverse car sensor using Arduino When we select reverse gear, the reverse lights powers, so we can take electricity from them. My question is can i power my Arduino directly from ...

arduino-uno

asked by Man Man 3 votes answered by Majenko 3 votes

Arduino beginner question

I just got a new pro-micro Atmega32U4 board, and installed the current Arduino IDE (1.8) and cannot get it working. There is no entry for a pro-micro, so I chose Leonardo as it uses the same chip. ...

bootloader

asked by ctrl-d 3 votes answered by Celary 2 votes

Get data from website with ESP8266 using AT commands

I'm trying to get data from a website by sending a HTTP GET request via AT commands for the ESP8266. Here is my current code: #include <SoftwareSerial.h> const byte rxPin = 2; const byte txPin ...

arduino-uno esp8266 softwareserial

asked by Henrik 2 votes answered by Henrik 0 votes

Looking for learning resources to teach the "principles" rather than "follow this" projects

I just got the Arduino starter kit as my background is software developer (C++, python, etc) and I'm interested to get into the electronics side, and I love LED effects and home automation of all ...

programming

asked by user29493 1 vote answered by Maximus 4 votes

How is the bootloader activated when device while device is running?

For the sake of specificity I am referencing my question to Arduino. It applies to all AVRs with hardware USB and a bootloader though. The bootloader is capable of receiving new program data over the ...

Greatest hits from previous weeks:

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

Arduino Mega timeout communication with programmer error

I have an Arduino Mega 2560 and it was working fine until about lunch time when I started getting this error: avrdude: stk500v2_ReceiveMessage(): timeout avrdude: stk500v2_getsync(): timeout ...

bootloader arduino-mega avrdude

asked by bladepanthera 9 votes answered by m3z 2 votes

Can you answer these?

RFID reader for unknown tag 125kHz

I have a unknown RFID tag and try to read his value. I bought two readers RDM6300 125KHZ and RC522 13.56MHz. Each of the readers connected to arduino works well with the purchased corresponding tags, ...

rfid

asked by Honzík 1 vote

Attempting to port a popular touchscreen library to the Arduino 101. Very close, but getting erronious results. May have to do with data types.

So I'm attempting to alter the Seeedstudio touchscreen library to run on the Arduino 101 with the Intel Curie board. Found here: https://github.com/Seeed-Studio/Touch_Screen_Driver After soliciting ...

101

asked by LegitimateWorkUser 1 vote