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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Pro micro not recognized when connected to USB

I have bought 3 pro micro and when I connect them with an USB cable (tried several cables), my PC doesn't recognize them and the port menu in the Arduino IDE is disabled. After some researches, I have ...
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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 ...
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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 ...
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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 ...
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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 ...
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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" (...
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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 ...
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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 ...
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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/...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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, ...
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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 ~ ...
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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 ...
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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 ...
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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 ...
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4 votes
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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-...
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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? ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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?
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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
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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 ...
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Rotary encoder using interrupt

This is my first time working with a rotary encoder and interrupts. I am using a Pro Micro which has interrupt pins at pin0 and pin1. The code below works as expected. My question: do I need to use ...
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Changing ESP-12E NodeMCU to ESP-01S - how to trigger sketch?

I had my sketch up and running with a NodeMCU and a Leonardo Pro Micro and decided I wanted to minimize the footprint of the project and use the smaller ESP-01S board instead. The ESP-01S is ...
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No ttyACM0 with Pro Micro on Ubuntu 18.04

I am trying to determine the dev path of a USB keyboard running an Arduino Pro Micro on my Ubuntu 18.04 system. The files /dev/ttyACM0 and /dev/ttyUSB0 do not exist. When I run dmesg I get: [ 410....
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Arduino Pro Micro - switch off LEDs

I am using a Arduino Pro Micro as a keyboard (USB HID device). Each time I press a key, the RX LED and TX LED light up. Can I switch them off in software?
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How ro re-enable 32u4 USB controller after sleep mode?

I've run into quite the problem with my 32u4, I can't get it to reconnect to the computer upon wakeup from a sleep mode! So I have an Arduino Pro Micro featuring the 32u4, and I'm also designing a ...
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Avrdude & micro clone

I am trying to program a Pro Micro clone (black PCB, 5v), using this command avrdude.exe -p atmega32u4 -c avr109 -U flash:w:pro_micro_ISP_B6_10.hex:i -P COM3 but this is the (obviously incorrect) ...
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How to trigger NodeMCU sketch from Arduino Leonardo Micro Pro?

So this is probably a very simple question. I have my NodeMCU set up and working where it connects to wifi and sends a push notification. Currently it does that automatically when connected to power. ...
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How to use power led from arduino-pro-micro?

In my project I need 3 leds. I would like to use on-board leds if possible. I know how to use PB0 and PD5 red on-board leds, and I would like to hack the board somehow to use the green power led. If ...
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4 votes
2 answers
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Can't upload sketch - avrdude: butterfly_recv(): programmer is not responding

I'm trying to upload a Blink example to run on a pro-micro (leonardo) but it is not working anymore (it was just working yesterday). Steps to reproduce: Plug the device in USB port Open Blink ...
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