Tech stuff: Remapping Betaflight Beeper Meteor75 Pro

Remapping Betaflight Beeper for Meteor75 Pro

Remapping Betaflight Beeper

I crashed my drone, and the worst part is that it happened in a field with waist-high grass. I searched for hours, nearly giving up, but I eventually found it. So, I decided it's better to add a small buzzer; I don't want to spend hours searching again if I crash my Meteor75 Pro.

the buzzer i used is JHE20B ( https://s.shopee.ph/3LDAu7Iham ), its small and with its own batt

JHEMCU JHE20B

Matrix 1s 3 in 1 flight controller (Meteor75 Pro HD DJI o4 Lite)

Matrix 1s 3 in 1 HD flight controller

it seems the Matrix 1s 3in1 HD doesnt have a buzzer +B -B pad and the only free UART in the FC is TX2. the only way is to remap the Betaflight Beeper to UART TX2.

connect FC to Betaflight, go to CLI tab

FYI, just to be clear not all FC has the same mapping (ex. SB F405 resource BEEPER 1 C15)

type "resource"

look for the word "resource BEEPER 1 A08" (A08 is the default for my FC)

next, look for the word "resource SERIAL_TX 2 A02" (A02 is the default for my FC)

to remap Beeper to UART TX2 type "resource Beeper 1 A02"

next, type "resource SERIAL_TX 2 none"

next, type "set beeper_inversion = Off" (the default is On) if u dont do this once u power up ur buzzer wont stop beeping continously.

next, type "Save"

you can close BF and disconnect from USB

next is you solder the wires to TX2 pad, +5v pad and GND pad, reminder JHEMCU JHE20B pinout Green(-B), Red(+5v) and Black(GND) 🥸