> For the complete documentation index, see [llms.txt](https://principiot.gitbook.io/principiot-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://principiot.gitbook.io/principiot-docs/f7-pi/important-notes.md). # Important Notes Here a few key things to keep in mind: * When used with the PRINCIPIOTF7 Betaflight and INAV targets, the IMU’s orientation needs to be updated as it is rotated 180 degrees. Before flying, verify in the respective configurator that the orientation reported by the Flight Controller is correct. To change the orientation: * In Betaflight: Go to the Configuration tab, under Board and Sensor Alignment set Yaw Degrees to 180. * In INAV: Go to the CLI tab, enter “set align\_board\_yaw = 1800” in the console, then press enter. Finally, press the Save Settings button. * The Flight Controller comes preflashed with Betaflight 4.5.1 with the Crossfire radio protocol and DSHOT motor protocol. For use with any other receiver or motor protocol, the Betaflight firmware will need to be reflashed. This is an easy process, see the Flashing section below for instructions. * The onboard connectors are compatible with the JST SH 1.0mm connector series. Customized cable harnesses are available with larger orders. For more information on OEM integration, contact . * All data pins (UARTs, I2C, SPI, LED strip, etc) are 3.3V tolerant. Do not apply more than 3.3V to the pins or you may damage the processor. * When powered over USB, only the receiver and GPS 5V ports are powered. The other 5V systems are only powered when running from battery power. * The 3.3V supply is limited to 600mA and shared with the main processor. Don’t pull more than 300mA from this pin, otherwise you may damage the Flight Controller. * Do not power the Flight Controller with more than 26V or it may be damaged. * The ESC telemetry pin is shared with the UART 6 peripheral. If using ESC telemetry, UART 6 can’t be used for another purpose.