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> Multi-Rotors, Drones & Parts > Flight Controllers & Accessories > Flight Controllers


Hobbyking KK2.1.5 Multi-rotor LCD Flight Control Board With 6050MPU And Atmel 644PA

Hobbyking KK2.1.5 Multi-rotor LCD Flight Control Board With 6050MPU And Atmel 644PA
Hobbyking KK2.1.5 Multi-rotor LCD Flight Control Board With 6050MPU And Atmel 644PA

The next evolution of the rotor revolution is here!! The KK2.1.5 is packing new found power with updated sensors, memory and header pins.

The KK2.1.5 is next big evolution of the first generation KK flight control boards. The KK2.1.5 was engineered from the ground up to bring multi-rotor flight to everyone, not just the experts. The LCD screen and built in software makes install and setup easier than ever. 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 KK2.1.5 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 KK2.1.5 added polarity protection to the voltage sense header and a fuse protected buzzer outputs, in case something is accidentally plugged in incorrectly. The voltage sense line has been updated for better accuracy. The board is clearly labeled and the voltage sense line color has been changed to red for easy identification, 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 KK2.1.5 was built for you. The 6 Pin USBasp AVR programming interface ensures future software updates will be quick and easy.

Size: 50.5mm x 50.5mm x 12mm
Weight: 21 gram (Inc Piezo buzzer)
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 ESC1520us

Firmware Version: 1.6:
Pre-installed firmware.
Quadcopter +
Quadcopter X
Hexcopter +
Hexcopter X
Octocopter +
Octocopter X
X8 +
X8 X
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.

What is a Multi-Rotor Control board you ask?

The HobbyKing KK2.1.5 Multi-Rotor controller is a flight control board for multi-rotor aircraft (Tricopters, Quadcopters, Hexcopters etc). Its purpose is to stabilize the aircraft during flight. To do this it takes the signal from the 6050MPU gyro/acc (roll, pitch and yaw) then passes the signal to the Atmega644PA IC. The Atmega644PA IC unit then processes these signals according the users selected firmware and passes control signals to the installed Electronic Speed Controllers (ESCs). These signals instruct the ESCs to make fine adjustments to the motors rotational speed which in turn stabilizes your multi-rotor craft.

The HobbyKing KK2.1.5 Multi-Rotor control board also uses signals from your radio systems receiver (Rx) and passes these signals to the Atmega644PA IC via the aileron, elevator, throttle and rudder inputs. Once this information has been processed the IC will send varying signals to the ESCs which in turn adjust the rotational speed of each motor to induce controlled flight (up, down, backwards, forwards, left, right, yaw). 

** 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 2.0) 

PRODUCT ID: 9171000446-0

Shipped from:
International Warehouse



  • HobbyKing Sticker Sheet - Multirotor

    Combo Price: $0.45   IN STOCK
    Add to Cart

  • 3cm Male to Male Servo Lead 26AWG (10pcs/set)

    Combo Price: $4.14   BACKORDER
    Add to Cart

  • Hobbyking SK450 Glass Fiber Quadcopter Frame 450mm

    Combo Price: $16.95   IN STOCK
    Add to Cart

  • ZYX-S DSM2/DSMJ Compatible Satellite Receiver Cable

    Combo Price: $3.43   IN STOCK
    Add to Cart

  • Y Adapter For KK2.0 KK2.1 and Naze32 Super Bright LED and Buzzer

    Combo Price: $1.95   IN STOCK
    Add to Cart

  • Hobbyking X580 Glass Fiber Quadcopter Frame w/Camera Mount 585mm

    Combo Price: $19.26   IN STOCK
    Add to Cart

  • KK2.0/ Naze 32 Super Bright Status and Alarm LED

    Combo Price: $7.95   IN STOCK
    Add to Cart

Further discounts available for registered & logged-in customers.

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 Customer rated
Total of 840 discussions.
Scott  1 points - 5/25/2016
Hi, I am a beginner. I have built a mini quad with the KK2. can't get it off the ground. It just flips over and breaks props. please help
Andreis Gustavo  2 points - 5/23/2016
When do you think it will go to stock again? It's the only thing holding back my order now :/
jzzto  411 points - 5/22/2016
Hi, i am doing something wrong, but i am not able to change pi settings.. i go to menu, then pi settings, scroll down to P Gain or other, press change, change the value and change again, but when return, keeps the old value... what i am doing wrong???? thanks
David  8 points - 5/17/2016
I can invest as a channel in the multicopeter with kk 2.1.5 I need to make a reverse channel from the KK2.1.5
 RonRC 4377 points
Hi David, what exactly are you trying to accomplish. Giving that information would make it easier for others to help you. All the best and Happy flying!
RonRC  4377 points - 5/12/2016
These boards are capable of stabilizing inherently unstable aircraft.
 RonRC 4377 points
Another example is my UFO
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Tiny changes over KK2.1 and not that much different from KK2.0, but a really great board all around that is so easy to set up and performs well too. Thanks HK for making it available to the masses :)

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very good item.. kk2.1 board> some oscillation but kk2.1.5 board> same condition > not oscillation.....

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Great to have all connectors prepopulated and voltage reversal protection is finally here - less chance of smoke.

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great help for beginners in the hobby lots of instructions available on youtube for setup and use well tried and tested flight controller , works great

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