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KeeYees Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino IDE Leonardo Bootloader (Pack of 3pcs)

Brand: KeeYees

4.4 443 ratings

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Brand	KeeYees
CPU speed	16 MHz
Connectivity technology	USB
Included components	3 x Pro Micro ATmega32U4 modules
CPU manufacturer	Atmel
Wireless communication standard	802.11b
Compatible devices	Personal Computer
Processor count	1
Total USB ports	1
UPC	705883355017 705883356052

About this item

ATMega32U4 running at 5V/16MHz, maximum voltage on the RAW pin is 9V, recommended voltage 6-7V.
Supported by Arduino IDE V1.0.1; 4 x 10-bit ADC pins, 12 x Digital I/Os; Rx and Tx Hardware Serial Connections.
Just connect to the On-Board micro-USB connector for programming. (If this module cannot be recognized by your computer, please refer to this link to install the driver https://www.arduino.cc/en/Guide/DriverInstallation)
The PRO Micro board can be powered via the micro USB connection or with an external power supply.
Please click the [Tool] and choose the module [Arduino Leonardo] when you open the Arduino IDE software.

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This item: KeeYees Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino IDE Leonardo Bootloader (Pack of 3pcs)

$29.98

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Product information

Technical Details

Manufacturer

‎KeeYees

Place of Business

‎Shenzhenshi, Guangdongsheng 518109,CN

Manufacturer reference

‎KYES8-196-3

Product Dimensions

‎10 x 9 x 8 cm; 10 g

ASIN

‎B07FXCTVQP

Additional Information

Best Sellers Rank

#22,977 in Electronics (See Top 100 in Electronics)
#37 in Internal USB Port Cards

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Product description

Features:
ATmega32U4 running at 5V/16MHz
Supported under Arduino IDE v1.0.1
Recommend power supply for board: 6-7V, less than 9V
On-Board micro-USB connector for programming
4 x 10-bit ADC pins, 12 x Digital I/Os
Rx and Tx Hardware Serial Connections

How to use?
1. Connected to computer. (If this module cannot be recognized by your computer, please refer to this link to install the driver https://www.arduino.cc/en/Guide/DriverInstallation)
2 Opened Arduino IDE and loaded Blink sketch.
3. Set board to Leonardo and selected the appropriate COM port (It showed up in the list already identified as a Leonardo).
4. Connected an LED to pin 9 and modified the sketch accordingly.
5. Hit upload and within a few seconds having a blinking LED.

Package Includes:
3 x Pro Micro ATmega32U4 5V 16MHz Module for Arduino

KeeYees: Best choice in various Electronic Modules & Components, DIY Parts and Tools to
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	This Item KeeYees Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino IDE Leonardo Bootloader (Pack of 3pcs)	Recommendations OSOYOO 3pcs Pro Micro Board ATmega32U4 Leonardo 5V/16MHz Module Board Type C Port for Arduino	Pro Micro ATmega32U4 Microcontroller Board for Arduino IDE Leonardo Bootloader, Pre-Soldered Headers, 16MHz Clock Speed, 32KB Flash Memory, 24 I/O Pins (2PCS)	DEVMO 2PCS Pro Micro ATmega32U4 5V 16MHz Micro-USB Development Module Board with 2 Row pin Header Compatible ard-uino Leonardo Replace ATmega328 Pro Mini	Kidsrobot ESP32 ESP-WROOM-32 Development Board, 38-PIN and USB Type-C, WLAN WiFi + Bluetooth Dual Core Microcontroller for Arduino IDE, Silicon CP2102 USB Bridge (2 PCS)	KeeYees Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino IDE Leonardo Bootloader
	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment
Price	$29.98	$31.00	-10% $26.99 Was: $29.99	$29.99	-14% $18.99 Was: $21.99	$15.99
Delivery	Get it by Monday, Jan 6	FREE Delivery	Get it by Sunday, Jan 12	Get it by Sunday, Jan 12	Get it by Monday, Jan 6	Get it by Monday, Jan 6
Customer ratings	4.4443	4.543	4.615	4.44	4.550	4.1105
Sold by	KeeYees-CA	KOOKYE & OSOYOO Authorized Retailers	O.T. CA	developmoreus	O.T. CA	KeeYees-CA
hardware interface	usb	usb	—	usb	—	—
CPU manufacturer	Atmel	—	Atmel	Atmel	Espressif	Atmel
CPU speed	16 MHz	—	16 MHz	16 MHz	240 MHz	16 MHz
connectivity tech	USB	USB	I2C, USB	USB	I2C, USB, Bluetooth, Wi-Fi	USB
wireless standard	802 11 B	—	802 11 B	bluetooth	802 11 B, bluetooth	802 11 B
core count	1	1	1	1	2	1

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Customer reviews

443 global ratings

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Customers say

Customers find the single board computer functional and good value for money. They say it works well for keyboard and mouse emulation without additional driver requirements. However, some customers have reported issues with the USB ports being fragile and breaking off after general use.

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Functionality Quality Value for money Usb ports

17 customers mention "Functionality"13 positive4 negative

Customers find the single board computer functional. It works well for their use cases and without additional driver requirements. They say it's good value for money and works great for keyboard/mouse emulation, programming with Arduino IDE, and building split keyboards using QMK.

"They worked great for me. It took maybe 5 minutes to solder on all the pin headers for each board and I am definitely not an expert...." Read more

"...I'm giving it two stars because they still work for my use case, and they do their job...." Read more

"...Work great, never had a single one fail on me and I have probably use a dozen in the last 8 months...." Read more

"...second one soldered with pin headers and fix - not working, component dead short, died young. third one still needs pin headers and fix...." Read more

10 customers mention "Quality"10 positive0 negative

Customers like the product's quality. They say it's a good value and works as expected. Some reviewers mention that while it's good in theory, it needs improvement in practice.

"...Boards seem to be good. Noted another comment about substandard micro USB port not fully soldered on sides...." Read more

"Great little boards at a good price...." Read more

"Good quality.. works great for my embedded projects needing USB hosting capability." Read more

"Good In Theory Needs Improvement In Practice..." Read more

9 customers mention "Value for money"9 positive0 negative

Customers appreciate the value for money. They say it works as expected and is a great inexpensive option for split keyboards.

"...So while it seems like good value there are drawbacks, which fortunately are addressable, but something to keep in mind." Read more

"...I am happy with the boards and at $20 for 3 it was a great price." Read more

"...All three work properly, seems like a good value at $21." Read more

"...while the price for a pro micro is good, i guess you get what you pay for" Read more

13 customers mention "Usb ports"2 positive11 negative

Customers are unhappy with the USB ports. They report that the ports are fragile and can break off easily. Some mention that the ports are not fully soldered on the sides, causing them to rip off or pop off.

"...One of my Pro micros came with a connector damaged. The connector must have been squashed during shipping, and it had to be re shaped to allow a..." Read more

"...the previous reviews I was aware of the issue of the micro USB plugin being poorly attached. So I was mindful of this when plugging in and out...." Read more

"...Score: all with flaky USB ports, first one soldered with pin headers and fix - working..." Read more

"Two out of three had the power adapter detach from the board. I think I got a bad batch. I don't think I was abusing the power adapter too harshly" Read more

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Top reviews from Canada

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Cam
Worked as expected.
Reviewed in Canada on April 22, 2024
Verified Purchase
They worked great for me. It took maybe 5 minutes to solder on all the pin headers for each board and I am definitely not an expert.

For reference, the price when I bought these was $31.04. I know there tends to be fluctuation in prices right now. I'll happily pay the overhead rather than waiting 3 months for Ali.

I used the Leonardo board setting in the Arduino IDE with no issues.

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lucas
Unless you know how to solder SMD components...
Reviewed in Canada on January 21, 2021
Verified Purchase
Update: seller got back to me, and refunded the damaged micro. This is definitely the best arduino that I have purchased, and I have brought my rating from 4 to 5.

Two of my three micros were either damaged, or missing something.

One of my Pro micros came with a connector damaged. The connector must have been squashed during shipping, and it had to be re shaped to allow a micro b cable to fit into it. luckily I only plan on using the connector once, because my project has its own power supply.

Another of my Micros didn't come with half the pins. They just straight up didn't include them. I wasn't planning on using them anyway though.

I got lucky. They still perform well, and do what I want them to do. someone else might have the same problems as me, but it might not work for their use cases.

I'm giving it two stars because they still work for my use case, and they do their job. The manufacturer just ships them in bubble wrap, thus they are easier to damage.

I contacted the seller and they refunded me for the damage. so I was very grateful for that.

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Jaymie Heintz
Good product for the cost
Reviewed in Canada on July 5, 2024
Verified Purchase
I've used 9 of these bad boys in my projects, and they seem to be holding up well. My only real issue is that the usb ports are fairly fragile and can break off as noted by some others.

The port itself and the pcb are solid; the break seems to happen consistently at the solder joint on either side after repeated movement causes the metal to work-harden and become brittle. The solution I've found to work best is to add a decent sized bead of lead based solder to both add a bit of pliability to the metal and add more material to reinforce the joint

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Poppa
Works without additional driver requirements to program with arduino IDE.
Reviewed in Canada on November 2, 2023
Verified Purchase
Used to make programmable keyboard HID.

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Amazon Customer
Beats waiting for months to get them from China
Reviewed in Canada on May 31, 2020
Verified Purchase
These work great and are the same quality as basically every other Pro Micro. Work great, have used tons in keyboard converters and controllers and whatnot. Work great, never had a single one fail on me and I have probably use a dozen in the last 8 months. Certainly marked up over China but it's not that bad and it's nice that I just wait a few days for it to arrive instead of months.

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Gogglesp
Don't try to program as a Leonardo
Reviewed in Canada on November 1, 2022
Verified Purchase
I've used more Arduino versions than I can name and this is the first time I bricked one with code (simple blink program at that). DO NOT try using Leonardo as the board option, download the specific Pro Micro drivers. Works fine if you don't do something stupid on somebody else's advice...

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Jon
Good In Theory Needs Improvement In Practice
Reviewed in Canada on December 8, 2020
Verified Purchase
I bought this Pro Micro 3-pack as I was soon to use 2 of them for upcoming keyboard builds. So at $20.99 (at time of purchase) this felt like good value.

Reading the previous reviews I was aware of the issue of the micro USB plugin being poorly attached. So I was mindful of this when plugging in and out. However, even with the minimal required applied force, the port broke off at the soldering points. I thought some people were being excessively forceful but this is not the case, they are just not well attached.

Now since you have to solder this pro micro regardless, do yourself a favor and solder the contact points on both sides (shown in image where mine broke) as well, doing so will secure it in place. Once done you should not have that issue.

So while it seems like good value there are drawbacks, which fortunately are addressable, but something to keep in mind.

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Jon

Good In Theory Needs Improvement In Practice
Reviewed in Canada on December 8, 2020
I bought this Pro Micro 3-pack as I was soon to use 2 of them for upcoming keyboard builds. So at $20.99 (at time of purchase) this felt like good value.

Reading the previous reviews I was aware of the issue of the micro USB plugin being poorly attached. So I was mindful of this when plugging in and out. However, even with the minimal required applied force, the port broke off at the soldering points. I thought some people were being excessively forceful but this is not the case, they are just not well attached.

Now since you have to solder this pro micro regardless, do yourself a favor and solder the contact points on both sides (shown in image where mine broke) as well, doing so will secure it in place. Once done you should not have that issue.

So while it seems like good value there are drawbacks, which fortunately are addressable, but something to keep in mind.

Images in this review

5 people found this helpful

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Len Patterson
The work for what I want to use them for
Reviewed in Canada on November 18, 2019
Verified Purchase
All 3 worked with my Windows 10 laptop. I am using them to setup Chromebooks out of the box with Centipede using the Arduino IDE from the Windows store. However just a note, I did try them on my MacBook PRO running Catalina and the IDE could not find the board, I did some searching and it appears to be a known issue with Catalina. I am happy with the boards and at $20 for 3 it was a great price.

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Top reviews from other countries

Xwin
I like this little board
Reviewed in the United States on May 12, 2020
Verified Purchase
I have tried all 3 out of 3 boards in the package and I love this little guy. The board is very small. The pictures do not do the board justice. If you have a breadboard, count out 12 pins and that is how long the board is. And the width is about 5 pins wide.
Unlike other reviewers, I would not recommend swapping bootloader from Leonardo. I just selected Arduino Leonardo in the Tools menu and the board worked perfectly. The board is programmed with the original Leonardo bootloader, which I verified by reading it and comparing the hash.
If you want to test the board just search for "arduino pro micro blink sketch". I included link before by Amazon did not approve my review. You can get the example from the Sparkfun site.
If your board suddenly stops registering COM port just short Reset to Ground and when Arduino IDE says "Uploading...", remove the short. The bootloader stays up for about 8 seconds and IDE has plenty of time to upload the sketch.
As for the rough board edges, I used 400 grit sandpaper and couple of passes over the edges made them smooth. Roughness is a normal byproduct of PCB cutting process.
There is enough IO pins for small projects and even a larger one as long as you don't need large amount of IO. I would definitely consider this board for my next project.
As some reviewers mentioned USB connector on one of my board is pointing slightly up. This does not interfere in any way with the operation. I would say it is not the best PCB assembly that I have seen but feel free to get one from SparkFun for 3x the cost.

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AmazonShopper
Excellent product, consistent, and performed as expected
Reviewed in the United States on November 25, 2020
Verified Purchase
I used the 3 pack KeeYees ProMicro to build 3 separate usb button boxes for various pc games and applications.

All 3 were uniform, solder joints were clean and open, and all 3 performed as expected. I had no issues connecting them to my pc, uploading sketches, or any type of other complications.

I have used one of these personally for upwards of 10 hours in a single session with no missed inputs, latency issues, or any other issues. The other 2 I gifted to friends but haven't heard any complaints. The button boxes utilize toggles switches, momentary switches, 3 way momentary switches, and rotary dials. The boards had no issues with any of these or the combination of all of them.

If you are looking for an arduino leonardo/pro micro you have found your board.

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AmazonShopper

Excellent product, consistent, and performed as expected
Reviewed in the United States on November 25, 2020
I used the 3 pack KeeYees ProMicro to build 3 separate usb button boxes for various pc games and applications.

All 3 were uniform, solder joints were clean and open, and all 3 performed as expected. I had no issues connecting them to my pc, uploading sketches, or any type of other complications.

I have used one of these personally for upwards of 10 hours in a single session with no missed inputs, latency issues, or any other issues. The other 2 I gifted to friends but haven't heard any complaints. The button boxes utilize toggles switches, momentary switches, 3 way momentary switches, and rotary dials. The boards had no issues with any of these or the combination of all of them.

If you are looking for an arduino leonardo/pro micro you have found your board.

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Gary Spender
Works as described
Reviewed in the United Kingdom on August 5, 2023
Verified Purchase
I ordered 3, 3 turned up.
They work.

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Phillip Smith
Works just like the Micro!
Reviewed in the United States on August 16, 2020
Verified Purchase
I had a lot of trouble uploading to this arduino clone; 9/10 of my spare USB cables refused to connect to it at all. The one that works is now permanantly embedded in a dance pad thats operating flawlessly at 1000hz.

I guess I own a lot of super-cheap USB cables. I've never had problems with them before; I re-wired the working one to an extension and it works great. The other cables have all 4 pins working, and with a similar resistance value to the one that's embedded... I really have no idea why it's so picky about USB cables. Either way, the product does work!

It's thin, doesn't run warm, and hasn't sheered on it's own, so I gave a 1/5 on "thickness, warmth, and sheerness". Hope that doesn't decrease the product's rating; those are technically good things about it!

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Sascha
Re-flow the USB solder joints if you will be plugging and unplugging them
Reviewed in the United Kingdom on February 19, 2024
Verified Purchase
Very handy boards for when you want to program something to be HID compatible like a joystick or a keyboard, programs the same way an arduino leonardo does.

The only problem i had was after about 30 times of unplugging and plugging in the USB micro cable the solder joints for the USB socket failed, and i had already applied hot glue to the back of the USB socket to help it withstand repeated insertions of the plug.

This was easily rectified by re-flowing the joints, and on inspecting an unused board i could see that very little solder was on the USB socket.

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KeeYees Pro Micro ATmega32U4 5V 16MHz Micro USB Development Board Module Microcontroller for Arduino IDE Leonardo Bootloader (Pack of 3pcs)

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Good In Theory Needs Improvement In Practice

Top reviews from Canada

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Top reviews from other countries

5.0 out of 5 stars I like this little board

5.0 out of 5 stars Excellent product, consistent, and performed as expected

5.0 out of 5 stars Works as described

5.0 out of 5 stars Works just like the Micro!

4.0 out of 5 stars Re-flow the USB solder joints if you will be plugging and unplugging them

I like this little board

Excellent product, consistent, and performed as expected

Works as described

Works just like the Micro!

Re-flow the USB solder joints if you will be plugging and unplugging them