F405 GPS not working via SoftSerial | Betaflight | Page 1

finite karma Jun 15, 2023, 9:24 AM

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Hi all,

I'm not able to get a BN-220 GPS working via SoftSerial on a F405 in BF 4.4.1. I had em*flight running with the same wiring and it worked. Could this have something to do with the board definition in BF? Would be amazing to get it to work as a safety feature 🙂

Hope I attached all relevant data, let me know if anything is missing

Configurator: 10.9.0 (697943b)
FC: Diatone MAMBA F405 MK2
Version: Betaflight / STM32F405 (S405) 4.4.1 Apr 16 2023 / 21:29:09 (e43d591b2) MSP API: 1.45
config: YES
board: manufacturer_id: DIAT, board_name: FURYF4OSD

diff all: attached

📎 diff_all.txt

steady reef Jun 15, 2023, 10:08 AM

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no softserial , you only need in Port tab, to enable sensor input > GPS on the uart you connected the gps

finite karma Jun 15, 2023, 11:50 AM

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the FC has only 2 full UARTs that are used for RX and DJI air unit, that's why I need softserial

finite karma Jun 15, 2023, 1:11 PM

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Ok, solved it. One can free up UART1 which is on the SBUS pin by deacivating the inverter with "resource inverter 1 none" and then use the SBUS pad as normal UART RX

#F405 GPS not working via SoftSerial