KK2.1 Hardcase Flight Controller with LCD Remote Programmer


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KK2.1 Hardcase Flight Control Board with LCD Remote Programmer


It uses the same firmware as the standard KK2.1 board, so compatibility and support is just as good. If you would like us to update your board for you with the latest firmware, simply message us at the time of purchase stating the exact firmware version you require, and we can do this for you free of charge! Please add 24 hours onto your dispatch time. Please make sure you message us ASAP, as we dispatch daily, and if you leave it too long, your purchase will probably already be on it's way to you.

Here at Zuue we've listed the benefits of the new Hardcase KK2.1 and listed them below for easier reading. Below this list is the full description for the board. Here are the main benefits:

1) A new hardcase for the board increases longevity and durability massively, meaning this is now a great option for sport quads where accidents happen frequently (Hey, we're all human!)

2) The LCD screen is now a separate module, and is used to remotely program the KK2 control board via a cable. This is good for 2 reasons: it means that the issue of broken LCD screens from those harder than usual landings are a thing of the past. It also helps to counter balance the added extra weight of the new hardcase housing by removing the screen, buttons and extra components that are now kept inside the remote programmer. The board flies and functions just like the original even when the programmer is disconnected, meaning you can leave that weight off the quad in flight. Its a win win combo.

3) The buzzer is now internally housed. With the original board, the buzzer was sold as a separate component that would plug into the board. It's now integrated into the hardcase. Nice.

4) Improved mounting options. The original suffers from a major issue - mounting it inside a quad that offers a protective frame or multi-level options was difficult because it would sometimes make changing the settings a little awkward. If for example you had a 3 tier multirotor, mounting it on the middle or bottom tier would make pressing the buttons and viewing the lcd difficult. This is now a thing of the past.



The next evolution of the rotor revolution is here!! The KK2.1HC (Hard Case) is packing new found power with updated sensors, memory, header pins, hard case and remote programmer.

The KK2.1HC is the next big evolution of the first generation KK flight control boards. The KK2.1HC was engineered from the ground up to bring multi-rotor flight to everyone, not just the experts. The remote LCD screen and built in software makes installing and setup easier than ever. The screen and programing buttons have been relocated to a remote plug-in programmer and a hard case installed, this makes the KK extremely durable. The plug in programmer uses the exact same format as the onboard version and can be plugged in at anytime for a quick value change. This new design allows the KK to be installed in frames where access to the onboard buttons and screen was an issue, you can even leave the cable plugged into the KK side and run it out for access to the programmer. The Hard case still retains the standardized 45mm mounting holes and has the buzzer is now internally mounted. Mounting locations and damage to the LCD screen is a thing of the past.

A host of multi-rotor craft types are pre-installed, simply select your craft type, check motor layout/propeller direction, calibrate your ESCs and radio and you’re ready to go! All of which is done with easy to follow on screen prompts!

The original KK gyro system has been updated to an incredibly sensitive 6050 MPU system, making this the most stable KK board ever and allowing for the addition of an auto-level function. At the heart of the KK2.1HC is an Atmel Mega644PA 8-bit AVR RISC-based microcontroller with 64k of memory. An additional polarity protected header has been added for voltage detection, so no need for on-board soldering. A handy piezo buzzer is also included for audio warning when activating and deactivating the board.

The KK2.1HC added polarity protection to the voltage sense header and on-board buzzer. The voltage sense line has been updated for better accuracy. The Hard case is clearly labeled, making installation and connections a snap.

If you’re new to multi-rotor flight or have been unsure about how to setup a KK board then the KK2.1HC was built for you. The 6 Pin USBasp AVR programming interface ensures future software updates will be quick and easy.


Size: 55mm x 55mm x 19mm

Weight: 32g

IC: Atmega644 PA

Gyro/Acc: 6050MPU InvenSense Inc.

Auto-level: Yes

Input Voltage: 4.8-6.0V

AVR interface: standard 6 pin.

Signal from Receiver: 1520us (5 channels)

Signal to ESC: 1520us

Firmware Version: 1.6:

Pre-installed firmware.




Quadcopter +

Quadcopter X

Hexcopter +

Hexcopter X

Octocopter +

Octocopter X

X8 +

X8 X





Aero 1S Aileron

Aero 2S Aileron

Flying Wing

Singlecopter 2M 2S

Singlecopter 1M 4S


(Custom Mix via the "Mixer Editor" option)

The Mixer Editor allows you to adjust where and how much signal the motors receive from stick input and sensors. This allows you to create any configuration possible with up to 8 motors or servos.

* Note: The programmer does NOT need to remain plugged in for the KK to operate, Simply plug in, program, unplug then fly

** Note: It is all ways recommended to update to the latest software version as part of your initial setup.(This is different than v1. 6 for KK2.0) 

*** Note: The KK2.1HC uses the same firmware as the KK2.1~2.1.5

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