KK 2.1.5 Build Guide

Beginner Friendly

Perfect first build for learning drone fundamentals with simple manual control. The KK 2.1.5 offers an easy-to-use LCD interface and teaches you the basics of flight stabilization without complex GPS features.

KK 2.1.5 Pinout

Understanding the connections and pin layout

Motor Outputs

M1-M4: Connect ESC signal wires
Pin Order: Signal, +5V, Ground
Motor Layout: X-configuration

Receiver Input

CH1-CH6: Receiver channels
AILERON: Roll control
ELEVATOR: Pitch control
THROTTLE: Altitude control
RUDDER: Yaw control

Power Input

+5V: From ESC BEC
GND: Ground connection
Note: Do not connect LiPo directly

F450 Drone Frame Assembly

Building the structural foundation of your drone

Step 1

Bottom Plate Setup

Install the ESCs and power distribution on the bottom plate. Solder the XT60 female connector for battery connection.

Tip: Keep wires neat and secure with zip ties

Step 2

Arm Installation

Attach the four arms to the bottom plate using M3 screws. Ensure arms are firmly secured with colored indicators for front/rear.

Tip: Red arms indicate front of drone

Step 3

Motor Mounting

Mount BLDC motors to each arm. Pay attention to motor rotation direction (2 CW, 2 CCW).

Important: Check motor rotation before flight

Step 4

Top Plate Assembly

Install flight controller, receiver, and GPS (if using). Secure top plate with standoffs and screws.

Tip: Use vibration dampeners for flight controller

Circuit Diagram & Connections

Wiring everything together correctly

Complete Wiring Diagram

Power Flow: Battery ΓåÆ PDB ΓåÆ ESCs ΓåÆ Motors & Flight Controller

Important: Always double-check polarity before connecting battery!

KK 2.1.5 Flight Controller

Center of the drone
Connect to all 4 ESCs
Receiver input channels
Powered via ESC BEC

FlySky i6 Receiver

Channels 1-4 to FC
Channel 5-6 for AUX (optional)
Powered from FC
Bind with transmitter

30A ESC (x4)

Signal wire to FC motor output
Power from battery via PDB
3 wires to each motor
BEC powers FC and receiver

A2212 BLDC Motor (x4)

3 wires from ESC
Swap any 2 wires to reverse
Check rotation direction
Install correct propellers

Detailed Connection Guide

Power Distribution Board (PDB) Connections:

Γ£ô Solder XT60 female connector to PDB (+) and (-) pads
Γ£ô Connect 4x ESC red wires to PDB positive pads
Γ£ô Connect 4x ESC black wires to PDB negative pads
Γ£ô Ensure all solder joints are clean and secure

ESC to Flight Controller Connections:

Γ£ô ESC 1 signal wire ΓåÆ KK2.1.5 M1 (Front Right)
Γ£ô ESC 2 signal wire ΓåÆ KK2.1.5 M2 (Rear Right)
Γ£ô ESC 3 signal wire ΓåÆ KK2.1.5 M3 (Rear Left)
Γ£ô ESC 4 signal wire ΓåÆ KK2.1.5 M4 (Front Left)
Γ£ô Only ONE ESC BEC powers the FC (remove BEC from other 3 ESCs)

Receiver to Flight Controller Connections:

Γ£ô RX Channel 1 (Aileron) ΓåÆ KK2.1.5 CH1
Γ£ô RX Channel 2 (Elevator) ΓåÆ KK2.1.5 CH2
Γ£ô RX Channel 3 (Throttle) ΓåÆ KK2.1.5 CH3
Γ£ô RX Channel 4 (Rudder) ΓåÆ KK2.1.5 CH4
Γ£ô Receiver is powered from FC via signal pins

Motor Rotation Configuration:

X-Configuration: Front-Right & Rear-Left spin CW | Front-Left & Rear-Right spin CCW

To reverse motor direction, swap any two of the three motor wires

KK 2.1.5 Setup & Calibration

Configuring your flight controller for stable flight

Initial Power-On & Factory Reset

Power on the drone with battery connected
Use 4 buttons to navigate to "Factory Reset"
Confirm reset by selecting "Yes"
Verify firmware and hardware versions displayed
Check that Gyroscope and Accelerometer show "OK"

Quadcopter Mode Selection

Navigate to mixer settings
Select "Quadcopter X Mode"
Confirm selection with "Yes"
Motor layout screen will display
Note motor numbers and rotation directions

KK2.1.5 LCD: Quadcopter X mode selection (reference)

Accelerometer Calibration

Place drone on flat, level surface
Navigate to "ACC Calibration"
Press "Continue" to start calibration
Do not move drone during process
Wait for "Calibrated OK" confirmation

Critical: Drone must be completely level and stationary during calibration

Receiver Test & Trim

Turn on transmitter
Navigate to "Receiver Test"
Use trim sliders to zero all values (except AUX)
Move sticks to verify correct channel mapping
Ensure all values return to zero at center

PI Editor Settings

Configure PID values for stable flight:

Aileron (Roll)

P Gain: 75
P Limit: 50
I Gain: 40
I Limit: 20

Elevator (Pitch)

P Gain: 75
P Limit: 50
I Gain: 40
I Limit: 20

Rudder (Yaw)

P Gain: 75
P Limit: 20
I Gain: 30
I Limit: 10

Assembly Videos

Watch KK 2.1.5 drone assembly walkthroughs

KK 2.1.5 Assembly Tutorial

Watch Tutorial