Arduino Stack Exchange
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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.

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.

134 questions
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All the differences between Arduinos: Pro Mini & Pro Micro

I'd like to know the differences between these two boards: Arduino Pro Mini and Arduino Pro Micro. Even if I've read this and this related post, it is not clear enough. I've always used the Arduino Uno or Leonardo and I'm a little bit scared of…
nkint
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Arduino Pro Micro, get data out of Tx pin?

I have a Sparkfun Arduino Pro Micro with an ATmega32u4 on it and a Roving Networks RN32 Bluetooth Module Theoretically, I should be able to solder the Rx of the Bluetooth to the Tx on the arduino and vice versa and I should get serial communication…
user3320919
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Pressure transducer / sensor (0.5 - 4.5V) innacurate analog pin readings

I have a relatively cheap 0-15psi pressure transducer. It has 3 pins - ground 5V and signal. The signal outputs a voltage of 0.5V to 4.5V based on pressure from 0psi to 15psi. I can verify it does respond to significant pressure increases so it…
DominicM
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MicroSD interfering with ISP programming

I have a microSD connected to an Arduino and I can't program it over ISP without removing the SD card. Does anybody know how to prevent the SD card from interfering with the ISP programming? Details: This is the microSD breakout:…
mar1980
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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 example in Arduino IDE (version 1.8.8) Select the port…
Fnr
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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?
qubit
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Strange values from LSM303 Magnetometer

I am having problems with values i get from Pololu MinIMU-9 boards's magnetometer. I am using Arduino-micro and the arduino library from Pololu. The sensor on the board is 3 axis accelero- and magnetometer LSM303. The problem is - the highest value…
zidik
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Nokia32/RCMM IR decoding issues

I am trying to decode the IR signals from a remote. I'm using an Arduino Pro Micro, and a TSOP38238 IR receiver. I found out that the remote uses the Nokia32(RCMM) protocol, and I have been able to partially decode it using cyborg5/IRLib…
Duom
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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.…
Robbe
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Arduino Pro Micro clone not recognized, flickering RX LED

I have an Arduino Pro Micro clone that seems to be in some sort of reset loop. The RX LED is flickering very fast and very dim. The power LED also seems to flicker at the same frequency but has normal brightness. The Arduino is not recognized by the…
timonsku
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Avoid a Pro Micro waking up a PC?

I have an Arduino Pro Micro mimicking as a HID, connected to a PC. The PC BIOS is configured to wake from keyboard events - it is switched on by hitting a key on the regular keyboard. This is a wanted feature and should stay. Unfortunately, it also…
AnoE
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Arduino stopwatch, which board to use?

I am planning on making a simple stopwatch with: A display One or two additional buttons to start the stopwatch and stop the stopwatch and maybe reset it. The problem is that it has to be as small as possible. With all those different Arduino…
Valentin Grégoire
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Send Keyboard Media Keys with Keyboard Library

I have an Arduino Pro Micro (ATMega32u4) that I want to use as an IR receiver for a media PC and need to send codes like Volume Up, Media Home, Play, etc. But when I look up the scan codes for those and send them to Keyboard.press() it just prints…
Adam Haile
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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. I can only seem to power ~15 pixels with full…
BoatHouse
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Does the Arduino pro-micro 3.3v use an 8MHz crystal or a 16MHz crystal with a clock divisor of 2?

I am trying to convert some 5v Leonardo-compatible boards to run at a lower 3-3.7v voltage, so that I can power my project using LiPo batteries. As far as I can tell, the default Leonardo settings (and pro-micro settings) will not run at this…
MRule
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