Newest Questions
25,033 questions
15
votes
1
answer
386
views
Is there a preprocessor constant for memory size
I would like my compiles to exclude some code depending upon the flash/program space available. To be used in the demo code of a library I support. Whereas my current solution is to use a #ifdef of ...
- 2,523
15
votes
2
answers
33k
views
Post Data To a Web Service From Arduino
If you want to submit sensor data such as temperature to a remote server/database somewhere you need to use some kind of call to a web server since it isn't possible to connect directly to a database ...
- 397
11
votes
2
answers
6k
views
How to pause Arduino for 1 millisecond through MATLAB?
I have been able to connect MATLAB to my Uno with this line of code: a = arduino('COM4'); through this package: Matlab support package for Arduino.
Right now, MATLAB is my main script that will ...
20
votes
5
answers
10k
views
How do I get an accurate time?
I've made a clock using an Arduino, but the time seems to drift. I am aware of the rollover issue; the clock seems to drift by about 15 minutes over the course of a week.
I'm using a custom PCB with ...
- 323
10
votes
3
answers
1k
views
Custom Arduino board beeps and process freezes while I'm uploading a sketch to it. Why?
The strangest thing is happening to a standalone Arduino board that I designed and built. The board (whose schematics are below) has the following features:
It has a ATmega328P with a 5V voltage ...
- 3,390
5
votes
1
answer
670
views
Why Arduino Severino (S3V3) sometimes needs reseting when uploading a sketch?
I have an original Arduino UNO R3 that I bought and an Arduino Severino (S3V3) that I've built.
I have no problems uploading sketches to the UNO, but sometimes, when uploading to the Severino board, ...
- 3,390
184
votes
21
answers
678k
views
"avrdude: stk500_getsync(): not in sync: resp=0x00," aka Some Dude Named Avr Won't Let Me Upload My Program
I made an awesome program the other day, and I wanted to upload it to my Arduino. After clicking the upload button, some mean dude named avr came along and stopped me, saying:
avrdude: ...
- 5,302
16
votes
2
answers
3k
views
Yún boot from SD card
I have an Arduino Yún, and it only has 16mb flash onboard for the Linux. I was wondering of it is possible to put a bootloader on the flash that uses the sd card as a rootfs? i want to be able to do ...
- 3,509
32
votes
5
answers
25k
views
What does it take to compile Linux on Arduino, if at all possible?
Is it possible to run Linux on Arduino? If yes, what steps and limitations need to be considered? If not, what are the limitations that prevent this?
- 428
14
votes
2
answers
920
views
Installing a different firmware on Arduino
Is it possible to upgrade the firmware on an Arduino so that it can do more things such as change undervolting/ overvolting in order to provide more processing power. To do this you would have to most ...
- 1,903
44
votes
4
answers
10k
views
What are (or how do I use) the power saving options of the Arduino to extend battery life?
For solar & battery powered projects, decreasing power consumption is a necessity.
I know a little bit about using a timer and interrupt to put the microcontroller into sleep when it isn't doing ...
- 7,565
36
votes
6
answers
58k
views
How to get HTTPS on Arduino?
Put plainly: is there a way to get an HTTPS connection on the Arduino?
I have been looking in to it, and I have found it is impossible with the standard library and the Ethernet shield, but is there ...
- 3,509
49
votes
11
answers
14k
views
Is an Arduino capable of running 24/7?
I'm making a simple Arduino web server and I want to keep it turned on all the time. So it must endure to stay working continuously.
I'm using an Arduino Uno with a Ethernet Shield.
It's powered ...
- 802