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Questions tagged [arduino-pro-micro]

The Pro Micro is an Arduino-compatible microcontroller. It is similar to the Pro Mini except with an ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface.

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TM1637 Decimal points

I am using the following TM1637 board with an Arduino Pro Micro clone. I am attempting to use the "TM1637Display Library" written by Avishay Orpaz, but I cannot find any way to use the four ...
LesRhorer's user avatar
1 vote
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40 views

Incorrect HEX code from DMM IR RS232

I have an Amprobe 38XR-A (sometimes seen as a meterman), these DMM's have a IR RS232 port on top and transmit a HEX code. Using the official cable I get a hex value of: 08000400500A0 I am attempting ...
Ash_noob's user avatar
-1 votes
2 answers
280 views

Arduino Pro Micro not recognizing INPUT or INPUT_PULLUP

I tried to make a controller box with multiple buttons. Sadly, when I tried to connect the buttons, the Arduino Pro Micro didn't recognize them being pressed. I even tried to connect a wire directly (...
szilard1996's user avatar
0 votes
1 answer
84 views

Sparkfun Pro Micro (5v) as ISP error

I'm trying to use Sparkfun Pro Micro (5v 16MHz) as ISP to program Attiny chips (OS:Windows10Pro). I followed instructions. Installed proper driver and added Sparkfun boards to ArduinoIDE: Using ...
AKTanara's user avatar
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2 answers
110 views

how to avoid an Arduino pro micro waking up a pc

I have an Arduino Pro Micro only sending data via com port, connected to a PC. I don't use the USB protocol and I think the Arduino send request with USB and it's the reason why my computer wakes up I ...
Hadrox1's user avatar
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1 answer
317 views

Pro Micro Double Reset help; Not able to get upload done in 8 seconds

I have timed the double reset as best as possible multiple times but the upload doesn't happen before the board leaves bootloader mode. this is all I'm given as an error which doesn't appear until ...
spendlove57's user avatar
2 votes
0 answers
278 views

MPU 6050 Pitch and Roll values bouncing back to zero

I wired an MPU 6050 to an Arduino Pro Micro: ...and installed the MPU 6050 library by Electronic Cats in the Arduino IDE. I used the IMU_Zero sketch to capture the acceleration and gyro offsets. I ...
Marcelo F's user avatar
2 votes
1 answer
535 views

Unable to flash arduino pro micro from Terminal

I am trying to upload an hex file to my arduino pro micro using Avrdude . The thing is that I cannot upload any code using the Avrdude terminal commands , but when I use arduino IDE to upload any code ...
santiago's user avatar
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0 answers
198 views

Atmega32u4: Reduce power consumption while keeping USB active

I have a USB powered board, that should consume as little power when idle as possible, while keeping the USB connection alive. The device only sends data to the host, doesn't receive any, so the ...
Dakkaron's user avatar
  • 229
2 votes
1 answer
342 views

Is it possible to remove the bootloader while flashing using the bootloader?

The question is meant as in, can I lock myself out of the Arduino using the bootloader, if I flash a hex file that doesn't contain the bootloader? Or does the bootloader automatically add the flashed ...
Dakkaron's user avatar
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Arduino Leonardo/Pro Micro sleep and USB

I am using an Arduino Pro Micro (basically a Leonardo in a smaller form factor) in a mobile application where power consumption is really important. To reduce power consumption, I put the Arduino to ...
Dakkaron's user avatar
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I can't get my Micro Pro to bootloader mode anymore

It's important to start by saying that this micro was working perfectly, and the keyboard I built with it was great. Then this happened: While using the QMK Toolbox I tried to upload an oversized .hex ...
Deleteman's user avatar
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1 answer
2k views

Matrix Keyboard

I'm trying to program a mechanical keyboard running on the Arduino Pro Micro (5V/16MHz). I'm using a matrix approach (4x12), and while I believe the code and the wiring (both of which I've checked ...
sesonab's user avatar
1 vote
2 answers
95 views

Disable Keyboard.h status LED

As soon as I include keyboard.h my pro micros LED starts flashing (as far as I know this indicates a serial connection is stablished or so.) But it's really annoying having a flashing led on my desk ...
FrontendC's user avatar
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1 answer
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Multiple Arduinos, same name - Windows 10 Game Controllers

I am making some SimPit panels and SimRacing devices, and I've run into an annoying issue. I have multiple Arduinos (Leonardos and ProMicros) that show up as the same "Controller Names" (...
FedaykinWolf's user avatar
1 vote
1 answer
134 views

Peculiar behaviour of arduino pro micro

I am working with an arduino pro micro and I am facing a peculiar problem. The project I am working with includes arduino MKR NB 1500 as well. I am transferring data from MKR NB 1500 to arduino pro ...
sud.ng7's user avatar
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1 answer
370 views

Mounting an Arduino inside a PC

I want to mount an Arduino Pro Micro inside my PC, hooked up to the PC's USB. I don't want to have external cables for this, but have it neatly cabled inside. My motherboard has USB connectors with 9 ...
Bram's user avatar
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What is the timing between reset and avrdude/spi communication? (re: avrdude problem)

I'm trying to troubleshoot an issue with avrdude involving a Raspberry Pi and a transistor to control the reset pin on an Arduino Pro Micro (atmega32u4). Where can I find information on the reset/...
SofaKng's user avatar
  • 151
1 vote
1 answer
701 views

Pro Micro board not responding to anything

I just got a couple of Arduino Pro Micros for a custom keyboard build. Before testing them with the Arduino IDE, I tried to test them with qmk by shorting RST to GND to try and flash it. After a few ...
ChocolateOverflow's user avatar
1 vote
1 answer
236 views

Sharing clock pin on Pro Micro

I am trying to get both a SPI LED matrix display and an NRF24L01 to both work on the same Arduino Pro Micro. I know they both want to use the clock pin but how do I get them to share? Can I use the CS ...
Ben Crawford's user avatar
1 vote
0 answers
147 views

Use HC05 and FTDI as Slave to Connect to control PC using HC05

Hi i just wanna ask if its possible to do this on HC05. So i can send some keyboard function? and if yes can you tell me how. Thanks
Jonathan Agravante's user avatar
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1 answer
566 views

Arduino Pro micro Serial communication problem with Node MCU

I recently bought an ATmega32U4 based Arduino Pro micro. I am using the Keyboard library and interfacing with my PC via USB. I am trying to create a serial communication between the Arduino Pro micro ...
Rishabh's user avatar
1 vote
1 answer
198 views

Pro micro Wire.endTransmission() does not return

I have an Arduino Pro Micro(blue version) and I'm having trouble using the I2C. To test it, I use the code below and the result is an infinite square wave on SCL and SDA lines and I only get the ...
therman's user avatar
  • 41
2 votes
2 answers
580 views

Upload s sketch to a 5v Pro-Micro board as 3.3V by mistake

I have 2 types of Pro-Micro(as shown here), both 5v, micro-usb, which worked as expected, until, accidentally were flashed as 3.3v using the Arduino IDE. At first I thought that the fact it stoped ...
guyd's user avatar
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0 votes
2 answers
986 views

How can I add a potentiometer and more buttons to my custom game controller?

I'm new to using Arduino, and know next to nothing about programming. I'm currently trying to add a potentiometer, and possibly a few more button inputs to my 3D-printed guitar controller project It ...
taj1994's user avatar
1 vote
4 answers
1k views

Can I control LED brightness with potentiometer without any code, as well as reading the potentiometer value?

I am just getting back into electronics and have started to play around with making my own button box. I am trying to control an LED's brightness using a potentiometer, while also reading the ...
HectorBart's user avatar
1 vote
1 answer
88 views

How do I add or subtract to a pre-determined value without having it default back to the original value?

Typical apologies in advance, it's been quite some time since I've tinkered with Arduinos. Using an Arduino Micro Clone (Pro Micro), TF02 LiDAR, and a Adafruit 1.2" 7-segment display, I've been ...
Suspicious Soup's user avatar
1 vote
2 answers
800 views

How to fix HC05 burning even after while using voltage regulator?

I'm using two circuits for my wireless head mouse project, one of them is a transmitter circuit with Arduino Pro Micro, HC05 Bluetooth module, Elechouse Voice Recognition Module V3.1, GY-521 module ...
Nahian Rifaat's user avatar
1 vote
0 answers
154 views

Copy outbound data of Serial to Serial1 for Pro Micro

I am working on a bluetooth HID device. There are libraries which make HID devices a cake walk if you are making a wired version of your HID device. I managed to configure my bluetooth module to ...
REVOLUTION's user avatar
1 vote
0 answers
432 views

Gamepad connection using Pro Micro(ATMEGA32u4 + HC-05

I have been working on making a HID compatible Gamepad using Pro Micro and HC-05 module. I have successfully configured the class of HC-05 module to appear as an Input device(A gamepad) on my PC ...
REVOLUTION's user avatar
0 votes
1 answer
463 views

ISR Issue: Arduino Pro Micro

I'm trying to do a small test where I am using the ISR on the Arduino Pro Micro it up from sleep mode. I'm using a Force Sense Resistor (FSR, a resistor that changes it's resistance depending on how ...
Jay's user avatar
  • 135
1 vote
1 answer
2k views

Arduino Joystick Library not Recognized by Games (Steam)

I have an Arduino Pro Micro running code that uses the Arduino joystick library to act as a gamepad. I'm just doing testing right now so there's a single button wired up and configured in the code. ...
Orion DeYoe's user avatar
1 vote
2 answers
5k views

Arduino Pro Micro not recognized by PC

so I've got myself a Arduino Pro Micro ATmega32U4 5V 16MHz and my PC (Win10 64bit) won't recognize it. So, after I firstly plugged it in, it was detected as a Leonardo, rather than a Pro Micro, ...
Marin Sebesic's user avatar
1 vote
1 answer
2k views

What does a tilde (~) mean as annotation for a data pin?

When I examine the datasheet for the Arduino Micro (couldn't find the Pro Micro on their site, btw) then I see some data pins annotated with a ~ character, and some are not. For instance, D9 has a ~ ...
Bram's user avatar
  • 199
0 votes
1 answer
773 views

Self made ATMega32U4 board first programming

I'm stepping into Arduino world and decided to build a small board to implement a gamepad. Prior designing the board I tested my firmware on a Arduino Pro Micro USB so I decided to make something ...
weirdgyn's user avatar
  • 111
0 votes
1 answer
399 views

Establishing wireless comm. between PC and arduino pro micro to exchange speech and gyro data

I have a client project to make a wireless head-mounted mouse. What wireless module should I use so that I can exchange data between my laptop and the arduino pro micro through the USB port like a ...
Nahian Rifaat's user avatar
0 votes
1 answer
217 views

fixing drifting issue for elechouse voice recog module v3.1 and MPU6050 sensor for head mouse even after doing sensor calibration?

For my head mouse project which is based on the voice recognition module V3.1 for left click, double click, right click operations, MPU 6050 accelerometer and gyroscope for cursor movement, I am ...
Nahian Rifaat's user avatar
4 votes
1 answer
1k views

Measure lipo voltage while powering arduino

I have a arduino pro micro 5V that I want to power with a 3.7V lipo. I also have a charging module to charge the lipo. (https://www.banggood.com/nl/TP4056-1A-Lipo-Battery-Charging-Board-Charger-...
Robbe's user avatar
  • 109
1 vote
2 answers
1k views

Read battery voltage from battery which is powering arduino

I have a 5V arduino pro micro. I want to power it with a 3.7V lipo. Should I use a step up module to convert it to 5V? I also want to measure the voltage of the battery. How can I do this? ...
Robbe's user avatar
  • 109
1 vote
0 answers
565 views

ATMEGA32u4 Arduino Bootloader Issues

I've been struggling with this issue for a few days on and off now.  I made a custom PCB (schematic) for a smaller Arduino Pro Micro and it works - mostly.  The only issue I had was that the pins on ...
av324192's user avatar
0 votes
1 answer
28 views

Cryptic compiler errors

I'm getting the error: left_hand:3:20: error: expected ']' before ';' token #define HAND_ROWS 5; ^ on this code: #include <Keyboard.h> #define ...
Lowell Camp's user avatar
0 votes
1 answer
555 views

Sparkfun Pro-Micro stuck on uploading

I have read multiple posts on how to reset the sparkfun pro-micro when it gets stuck during upload, and this seems to work to get it back to a state where I can upload new code again - However, I am ...
MattG's user avatar
  • 117
1 vote
1 answer
156 views

Cannot write lock byte on Arduino Pro Micro

I have an Arduino Pro Micro, with atmega32u4 chip and a caterine bootloader. However, every time I (successfully) flash some program over the USB port, the /dev/ttyACM0 device disappears, and I cannot ...
Heinrich supports Monica's user avatar
1 vote
0 answers
40 views

How to fetch the com port or any id I can use to upload specific program to a specific arduino? e.g. "a.ino" to arduino micro

My project is a head mouse for which I am using two arduino boards . I want to upload a specific program to a specific arduino. How can I do it? And if I need to use a pid or com port id about which ...
Nahian Rifaat's user avatar
0 votes
0 answers
51 views

Where do I get the wider arduino pro micro from?

I have a bunch of boards already fabricated for a game controller that uses the arduino pro micro. I ran out of the arduinos and ordered more. But the new ones are 0.6" wide from pin to pin, and my ...
Paul S's user avatar
  • 1
3 votes
3 answers
1k views

What can I do to increase the amount of LEDs I can power with a pro micro?

I am new to arduino and have a sparkfun pro micro that I'm using to power a one meter (60 pixels) APA 102 strip. I currently power it via USB and have a program that sends lighting instructions to it. ...
BoatHouse's user avatar
1 vote
0 answers
95 views

Arduino pro micro crashing

My arduino pro micro started behaving weird. I noticed it had crashed with very simple code on it (basically just two lines of fastled code followed by a delay. Then it didn't appear as a USB device ...
Julian Finn's user avatar
0 votes
1 answer
365 views

3.3v pin on a 5v Pro Micro?

I have a arduino pro micro that runs on 5v. I also have a Max4466 that needs 3.3v, however the pro micro doesn't seem to have a 3.3v VCC. Is there any way to attach the max4466 to the Board?
Julian Finn's user avatar
0 votes
2 answers
161 views

Compile error in Ubuntu 18.04

I'm trying to compile a code to arudino pro micro, I have the right option for compiling like the port and the type of the board,but I get an error,I can't copy
Blake's user avatar
  • 3
0 votes
2 answers
445 views

LSM9DS1 breakout - How to increase speed

With regards to the Adafruit LSM9DS1 breakout: enter link description here And using the Library: enter link description here I am trying to increase the sample rate, or speed of this chip. I am ...
MattG's user avatar
  • 117