iFlight BLITZ F7 Wiring Diagram

DJI Digital VTX + Radio

This section details the wiring for connecting the DJI Digital VTX and Radio system to the BLITZ F7 flight controller. Key connections include:

• 5V GND LED BZ-
• GND GND 5V GND VI
• BAT M5 M6 M7 M8
• 5V GND VI NC
• R6 CUR M4 M3 M2 M1 BAT BAT GND GND
• T5
• 5V GND
• T3
• GND
• 5V R4 SDA 5V R2 5V R1 9V
• GND T4 SCL GND T2 VO T1 GND
• R1 T1 GND 9V VO
• T4 R4 GND 5V
• 3.3V R2 5V GND R2 T2
• TS GND T3 GND
• RS SV R3 SV

Configuration Notes:

• Ensure your protocols match for DJI Radio input signals. DJI Goggle protocol and Betaflight protocol must be the same.
• For lower signal latency, use the SBUS_BAUD_FAST protocol on both ends. In Betaflight Configurator CLI, type set sbus_baud_fast=on, then save.
• Default settings: sbus_baud_fast=off, Goggle protocol set to NORMAL.

DJI Air Unit

Wiring for the DJI Air Unit, supporting voltage from 7.4V to 17.6V. The DJI Plug&Play connector has a VBAT passthrough.

Important: The DJI Air Unit can only handle voltage up to 4S. For 6S batteries, connect to the 9V (Built-in BEC).

Configuration/MSP:

• UART1: 115200
• UART2: 115200
• UART3: 115200
• UART4: 115200
• UART5: 115200
• UART6: 115200

DJI O3 Air Unit

Wiring and configuration for the DJI O3 Air Unit (7.4V-26.4V). For the O3 Air Unit, configure the OSD device to MSP in Betaflight Configurator CLI:

1. Set OSD device to MSP: set osd_displayport_device = MSP
2. Specify the serial port for MSP displayport (e.g., set displayport_msp_serial = 0, where 0 is the serial port number minus 1).
3. Type save and exit.

Various Receivers

This section covers wiring for different types of receivers, including FrSky SBUS, S.Port, and TBS Crossfire (CRSF).

General Receiver Connections:

• When not using the DJI remote controller, do not connect SBUS and GND.

FrSky S.Port / R-XSR +S.port (R9Mini, R9MM):

• If the DJI VTX is connected, you can connect the unused R2 for the receiver SBUS wire and connect S.Port to any free UART TX (e.g., T3) for Frsky telemetry.

Serial Receivers (via UART):

• Receiver Mode: Serial Rx
• The UART: Select the correct UART in the Ports tab.
• Receiver Provider: Choose from options like SBUS, FPort, CRSF, ELRS.
• Telemetry output: Configure as needed (e.g., SmartPort).

TBS Nano Crossfire (CRSF):

• Receiver Mode: Serial Rx
• The UART: Select the correct UART in the Ports tab.
• Receiver Provider: CRSF

ELRS:

• Receiver Mode: Serial Rx
• The UART: Select the correct UART in the Ports tab.
• Receiver Provider: CRSF

Configuration Table for Receivers:

VTX/CAM

Wiring for Video Transmitter (VTX) and Camera connections.

• VBAT
• GND
• TX
• 5V
• GND

GPS

Wiring for GPS module. Remember to configure a Serial Port (via Ports tab) when using the GPS feature.

• VBAT
• GND
• TX
• RX
• 5V
• GND

GPS Configuration Options:

• UBLOX Protocol
• Auto-detect
• Auto Baud
• Auto Config
• Use Galileo
• Set Home Point Once
• Ground Assistance Type

ESC

Wiring for Electronic Speed Controller (ESC) connection. This includes:

• M1, M2, M3, M4
• CUR (Current Sensor)
• VBAT
• GND

Model: BLITZ E55 G1 V1.0

LED/Buzzer

Connections for LED and Buzzer.

• LED/Buzzer
• BUZ
• GND
• 5V

Anti-Spark filter

Connection for an Anti-Spark filter.

• VBAT
• GND

General Notes and Status Indicators

Note: If not using iFlight electronics, ensure the plug pinout is identical or the wire harness needs to be reordered.

Status Indicator LEDs:

• FC startup successful: Blue LED is visible
• 3.3V & MCU available: Red LED is visible
• 5V BEC output available: Green LED is visible
• Vbat is available: Orange LED is visible

Each LED indicates the status of your flight controller.

Configuration Ports and Power

Ports Tab Configuration:

• SDA/SCL pads cannot be remapped to UARTs.
• Configuration:
• Power & Battery
• PID Tuning
• OSD
• Blackbox

Wiring Example:

• 5V R2 5V SDA R4 5V
• GND T1 V0 T2 GND SCL T4 GND
• 9V R1 5V R2 5V SDA R4 5V