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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   IN STOCK
    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   BACKORDER
    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   BACKORDER
    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.
 Customer rated
Total of 844 discussions.
MARTIN  1 points - 7/18/2016
RonRC  4420 points - 6/8/2016
These are great boards to stabilize just about any multi-rotor project you can think of.
 RonRC 4420 points
Here it works for my single copter too.
Andreis Gustavo  4 points - 6/5/2016
Hello, there friend, could you please update me when the next items are going to be in stock?
russram  19 points - 5/30/2016
Hi I am trying to calibrate my KK2.1 board and i get a message saying throttle pass through when i do the calibrate set function when i pull down the throttle stick the motors tart up as well if i leave the throttle stick up for a few seconds after the esc have finished beeping. Could it be that my rx binding time is to long and the esc somehow time out I have used many KK2 boards in the pasted and i don,t think that i have ever had this problem. thanks someone for some advice
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
 low911 75 points
Make sure you have calibrated the ESC's and the accelerometer on the kk board, check all connections especially the two that connect the esc's to the PDB. Check that the outputs from the receiver are in the right slot... and the trims are adjusted properly on your transmitter. if you are unsure reply to this message and I will get back to you on how to do it. Hope it Helps!
 jzzto 412 points
i am a begginer too, still no flights because i am having an issue with the P gain and I gain settings, but to prevent breaking props i have 4 hooks which are attached to the quad and then a line to hold them to the ground. you have the quad tied to the ground firmly but it can lift 20 or 30 cm from the ground, but it does not flip. in that point you can trim it to keep it steady and then fly (or i hope to do it in a short time)
 Scott 1 points
Thank you low911. not sure about the calibration of the ESCs unless that is on basic set up menu of board. Connections to the PDB are all good. Pretty sure we had all the receiver outputs were good, but we have disconnected everything to check board and will re-assemble. Pretty sure we had trims adjusted. but will be happy to receive any advise. We also attached rubber bands to the landing gear to tie it down for a test jzzto. it still flipped and broke a prop. Thanks Scott
 low911 75 points
Hi scott, Have you cheat that the motors are spinning the right way (motor 1 (front left) clockwise, motor 2 (front right) anticlockwise, motor 3 (rear right) clockwise and motor 4 (rear left) anticlockwise. If this is done, make sure the right props are on (some direction of motors) and after that calibrate your ESCs... Turn on your transmitter and push the throttle to max and then power on your quad (WITH THE PROPS OFF!!!) and wait for a couple of beeps from the ESCs then push the throttle all the way down and the ESCs should beep again, Turn off your quad and then your transmitter and that should be it! Hope it helps!
 Scott 1 points
Yes we have set up the motor directions properly and the correct props CW and CCW so those should be all set. But will do what you suggest for the ESCs. Will let you know... Scott
 Mustafa 1 points
its all about accelometer calibration ,, after doing what low911 asked for ,,, ensure that you do the acceleometer calibration with perfect balanced surface and after selecting the model ( X or quad) ,, i suffered with this long time until its perfectly resolved
 Scott 1 points
Hi, Im Back! not making much headway. Bought one of those adapter gizmos and updated firmware on the board. Now it tell me no motor layout and pick profile 1 but it won't let me choose anything. Really stuck no. Can't access where I can choose a motor layout.... Please Help
 Ang 1 points
Sounds like a corrupted flash. Try reflashing, and make sure it is for your board version (kk 2, kk 2.15, etc). Now the flipping, sounds like the P gains are too low. To tune PID, you need to do this first with self level OFF. Set your I gains to 0, see how the quad a behaves when you take off. If it keeps flipping, increase P gain until you are stable. If the quad oscillates, P is too high, bring it down a bit. There should be a range with your P is relatively stable. Increase I, take off and see if quad keeps angle when you roll sideways. If it can maintain the roll over around 4-5 meters, then I is about good. If you see oscillation, I is too high. A very good video that explains PID tuning, this is a must watch
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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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