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Questions tagged [arduino-micro]

A microcontroller board based on the ATmega32u4 with built-in USB communication.

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SoftwareSerial problems

Hi we are using an Arduino Micro and working with a Bluetooth device and a Rfid Scanner from Sparkfun(ID-20 LA). For that we implemented 2 SoftwareSerial objects and the Serial port for the Serial ...
Robin's user avatar
  • 133
3 votes
2 answers
4k views

if(Serial) not working correctly on micro or pro micro

I have an arduino micro and several clone "pro micro"'s both of which are based on the 32u4, i'm trying to make my project have a debug mode which is only active when the serial port is open, the ...
James Kent's user avatar
1 vote
1 answer
2k views

avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied Upload error:

I am using arduino-ide2.0.0-beta.7(CLI Version:0.18.3 alpha) on Manjaro Linux and I get this error when uploading sketch to my Arduino Micro: avrdude: ser_open(): can't open device "/dev/ttyACM0&...
programandoconro's user avatar
0 votes
1 answer
2k views

Software I2C - sending data

I'm trying to read a voltage in from a power supply to an Arduino Micro, then send it to an oscilloscope through an I2C (MCP4725). I would use the default pins on the Micro but I want to wire three ...
Hayden Bartsch's user avatar
8 votes
3 answers
33k views

Are there any reasons to pick Nano over Micro?

Nano is from 2008, and micro from 2012. Micro seems better on every parameter, in particular in having a better (I think) microcontroller, ATMega32u4, over ATMega328P. However, all the shops I've ...
Mads Skjern's user avatar
  • 1,125
5 votes
2 answers
422 views

How to differentiate between 2 Micros on Linux

I have 2 Arduino Micro based devices that I want to use on my Ubuntu Linux machine. I need them to have unique serial ports. Unfortunately, both have the same serial number which makes ...
Ben's user avatar
  • 153
3 votes
2 answers
3k views

How to send unmodulated IR-Signal via cable?

I need to generate en (extended) NEC signal. I have connected an Arduino with a display-device via an IR cable. Arduino --> IR-cable --> IR-input of display device IR-cable: One plug is ...
Michael B's user avatar
  • 370
3 votes
3 answers
769 views

How to have some code executed at a certain time of day with a DS3231 RTC?

I recently bought a DS3231 RTC, but I cannot seem to figure out how to get it to work. I have tried all different tutorials and example programs but I keep getting 2165.25.165 165:165:165 as the ...
Zelkins's user avatar
  • 135
2 votes
1 answer
1k views

What's the problem with baudrate?

I was trying to evaluate the speed of communication between pc and Arduino, using this code in Arduino: void setup() { Serial.begin(9600); } void loop() { Serial.println("Ciao Arduino"); } and ...
Francesco Pegoraro's user avatar
2 votes
1 answer
291 views

Arduino-based mains frequency monitor follow-up

Following my previous question, I'm getting closer to thinking about putting together this mains frequency monitor. I would just like to do a sanity check on my electronics before I order the ...
Ozzah's user avatar
  • 193
2 votes
1 answer
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Using Arduino Micro With 12V Buzzer

I have an interesting situation. I wonder if anyone can help? I have: 4x Arduino Micros loaded with the basic Blink sketch 5x 12 volt buzzers A desk full of completely fresh Duracell AA and 9v ...
stormCloud's user avatar
1 vote
1 answer
166 views

Why wont my custom Arduino-Micro-based board receive power via USB?

UPDATE: I believe I have mostly solved the power issues, but now have USB connectivity issues described in EDIT 3 at the bottom. I designed and printed a PCB for my MIDI controller project with a ...
Stuart's user avatar
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1 vote
1 answer
61 views

Arduino Micro: Why am I getting 6.00 as a result instead of 6.66?

Basically, on the TWR calculator page, when I entered 20 as the initial value and 3 as the value that comes after, I somehow get 6.00 as a result instead of 6.66 in the computeTWR() function. How can ...
John Seong's user avatar
1 vote
2 answers
881 views

Hardware network-infrastructure for a fully-arduino-based home-automation project

As already mentioned in another question, I'm spending LOT of time planning the home-automation system for my new house (currently still in the "still building" phase). Even if started only as a "...
Damiano Verzulli's user avatar
1 vote
2 answers
4k views

Unable to flash bootloader on ATmega32U4 with AVR dragon

I am flashing a naked ATmega32U4, but the process fails in the end where it is verifying. avrdude -c dragon_isp -p m32u4 -P usb -U flash:w:Caterina-Micro.hex -U lfuse:w:0xff:m -U hfuse:w:0xd8:m -U ...
JavaCake's user avatar
  • 139
1 vote
2 answers
4k views

433MHz sending not receiving

I'm trying to send data using these cheap parts. When I check the voltage on the data port of the transmitter, I see what I expect, 1.2 and 0.6 fluctuating while sending. But when I check the ...
Thijs's user avatar
  • 432
1 vote
4 answers
568 views

Altering code to run a timer while checking for a data input

I am rather new to the Arduino world and am looking for a way to create my own tipping rain gauge with only one Arduino(micro). I have had some help from a friend to get a loop that checks for when a ...
Mitch's user avatar
  • 11
1 vote
2 answers
10k views

Arduino Uno vs Arduino Micro timers → pins

Where do I find the pins relative to timers of each individual Arduino microcontroller? As I like Arduino's I already have various samples of them. The one I mostly use is the Uno and Micro for now......
cocco's user avatar
  • 431
0 votes
1 answer
1k views

Use lowpower-libary and still use serial connection and other things

I managed to get the LowPower libary working on my Arduino Micro. This code works perfectly: #include <LowPower.h> void setup() { // initialize digital pin LED_BUILTIN as an output. ...
Cowboy_Patrick's user avatar
0 votes
1 answer
3k views

Starting usb on pro micro after deep sleep (ATmega32u4)

I have just started playing with a low power arduino project, and have managed to get the power drain down to about 220uA using powerDown from LowPower. What I would love to be able to do is start ...
Richard87's user avatar
  • 111
0 votes
1 answer
1k views

External power supply?

I have a project where I'm looking to power 120 RGB LEDs in a strip (WS2812B). Obviously an Arduino Micro cannot supply this amount of current so I'm looking to use an external 5V/4A switching power ...
CatsLoveJazz's user avatar