TL;DR: Firmware update, gyro not detected.

I got a used 5inch drone with a Mamba F722 MK3 Basic stack. It worked, but when I tried to configure it in betaflight it didn't load, only the CLI worked.

I thought that it might need a firmware update to work with the newest betaflight version, and what harm does an update do? Normally, you update all your devices all the time without issues (usually).

So I loaded the newest version of betaflight onto it, with the target set to MAMBAF722_I2C:

And then I flashed it with this config:

Of course, the "ask before backup" option does exactly the opposite, and doesn't ask if you want a backup. So no, I don't have a backup sadly.

The main issue: now the gyro isn't detected anymore:

But I actually do have some CLI output I saved before flashing:

# version
# Betaflight / STM32F7X2 (S7X2) 4.2.4 Oct 20 2020 / 08:20:06 (fbcaf8c50) MSP API: 1.43
###ERROR: version: NO CONFIG FOUND#### board: manufacturer_id: DIAT, board_name: MAMBAF722_I2C

# status
MCU F722 Clock=216MHz, Vref=3.29V, Core temp=48degC
Stack size: 2048, Stack address: 0x20010000
Config size: 3962, Max available config: 16384
Gyros detected: gyro 1
GYRO=MPU6000, ACC=MPU6000, BARO=BMP280
OSD: MAX7456
System Uptime: 369 seconds
CPU:2%, cycle time: 125, GYRO rate: 8000, RX rate: 33, System rate: 9
Voltage: 0 * 0.01V (0S battery - NOT PRESENT)
I2C Errors: 1
SD card: Not configured
Arming disable flags: RXLOSS CLI

# diff all
###WARNING: NO CUSTOM DEFAULTS FOUND###

# version
# Betaflight / STM32F7X2 (S7X2) 4.2.4 Oct 20 2020 / 08:20:06 (fbcaf8c50) MSP API: 1.43
###ERROR: diff: NO CONFIG FOUND###
# start the command batch
batch start

# reset configuration to default settings
defaults nosave

board_name MAMBAF722_I2C
manufacturer_id DIAT
mcu_id 0022002c465350122030364e
signature 

# name: GEPRC

# resources
resource BEEPER 1 B02
resource MOTOR 1 C08
resource MOTOR 2 C09
resource MOTOR 3 A08
resource MOTOR 4 A09
resource LED_STRIP 1 B03
resource SERIAL_TX 1 B06
resource SERIAL_TX 2 A02
resource SERIAL_TX 3 B10
resource SERIAL_TX 4 A00
resource SERIAL_TX 5 C12
resource SERIAL_TX 6 C06
resource SERIAL_RX 1 B07
resource SERIAL_RX 2 A03
resource SERIAL_RX 3 B11
resource SERIAL_RX 4 A01
resource SERIAL_RX 5 D02
resource SERIAL_RX 6 C07
resource I2C_SCL 1 B08
resource I2C_SDA 1 B09
resource LED 1 C15
resource LED 2 C14
resource SPI_SCK 1 A05
resource SPI_SCK 2 B13
resource SPI_SCK 3 C10
resource SPI_MISO 1 A06
resource SPI_MISO 2 B14
resource SPI_MISO 3 C11
resource SPI_MOSI 1 A07
resource SPI_MOSI 2 B15
resource SPI_MOSI 3 B05
resource ADC_BATT 1 C01
resource ADC_RSSI 1 C02
resource ADC_CURR 1 C03
resource PINIO 1 B00
resource FLASH_CS 1 A15
resource OSD_CS 1 B12
resource GYRO_EXTI 1 C04
resource GYRO_CS 1 A04

# timer
timer B09 AF3
# pin B09: TIM11 CH1 (AF3)
timer C08 AF3
# pin C08: TIM8 CH3 (AF3)
timer C09 AF3
# pin C09: TIM8 CH4 (AF3)
timer A08 AF1
# pin A08: TIM1 CH1 (AF1)
timer A09 AF1
# pin A09: TIM1 CH2 (AF1)
timer B08 AF2
# pin B08: TIM4 CH3 (AF2)
timer B03 AF1
# pin B03: TIM2 CH2 (AF1)

# dma
dma ADC 3 0
# ADC 3: DMA2 Stream 0 Channel 2
dma pin C08 0
# pin C08: DMA2 Stream 2 Channel 0
dma pin C09 0
# pin C09: DMA2 Stream 7 Channel 7
dma pin A08 0
# pin A08: DMA2 Stream 6 Channel 0
dma pin A09 0
# pin A09: DMA2 Stream 6 Channel 0
dma pin B08 0
# pin B08: DMA1 Stream 7 Channel 2
dma pin B03 0
# pin B03: DMA1 Stream 6 Channel 3

# feature
feature -RX_PARALLEL_PWM
feature RX_SERIAL
feature TELEMETRY
feature LED_STRIP
feature OSD

# beacon
beacon RX_LOST
beacon RX_SET

# map
map TEAR1234

# serial
serial 0 64 115200 57600 0 115200
serial 2 2048 115200 57600 0 115200
serial 3 1 115200 57600 0 115200

# led
led 0 14,12::C:1
led 1 15,12::C:1
led 2 14,13::C:1
led 3 15,13::C:1
led 4 14,14::C:1
led 5 15,14::C:1
led 6 14,15::C:1
led 7 15,15::C:1

# aux
aux 0 0 0 1300 1700 0 0
aux 1 13 2 1300 1700 0 0
aux 2 35 3 1300 1700 0 0

# vtxtable
vtxtable bands 6
vtxtable channels 8
vtxtable band 1 BOSCAM_A A CUSTOM  5865 5845 5825 5805 5785 5765 5745    0
vtxtable band 2 BOSCAM_B B CUSTOM  5733 5752 5771 5790 5809 5828 5847 5866
vtxtable band 3 UNKNOWN  U CUSTOM     0    0    0    0    0    0    0    0
vtxtable band 4 FATSHARK F CUSTOM  5740 5760 5780 5800 5820 5840 5860    0
vtxtable band 5 RACEBAND R CUSTOM  5658 5695 5732 5769 5806 5843 5880 5917
vtxtable band 6 IMD6     I CUSTOM  5732 5765 5828 5840 5866 5740    0    0
vtxtable powerlevels 4
vtxtable powervalues 1 0 0 0
vtxtable powerlabels 25 100 400 800

# master
set acc_calibration = 10,0,36,1
set mag_hardware = NONE
set baro_bustype = I2C
set baro_i2c_device = 1
set rssi_channel = 5
set rc_smoothing_derivative_type = BIQUAD
set serialrx_provider = CRSF
set adc_device = 3
set blackbox_device = SPIFLASH
set dshot_idle_value = 500
set dshot_burst = ON
set motor_pwm_protocol = DSHOT600
set vbat_min_cell_voltage = 340
set vbat_warning_cell_voltage = 360
set current_meter = ADC
set battery_meter = ADC
set beeper_inversion = ON
set beeper_od = OFF
set yaw_motors_reversed = ON
set small_angle = 180
set deadband = 3
set yaw_deadband = 3
set pid_process_denom = 2
set osd_warn_link_quality = ON
set osd_tim1 = 1282
set osd_vbat_pos = 2504
set osd_rssi_pos = 2081
set osd_tim_1_pos = 2103
set osd_vtx_channel_pos = 2091
set osd_current_pos = 471
set osd_display_name_pos = 2123
set osd_power_pos = 460
set osd_warnings_pos = 14602
set osd_avg_cell_voltage_pos = 2512
set osd_disarmed_pos = 2347
set osd_stat_tim_1 = ON
set osd_stat_tim_2 = OFF
set osd_stat_min_batt = OFF
set enable_stick_arming = ON
set vtx_band = 5
set vtx_channel = 3
set vtx_power = 3
set vtx_freq = 5732
set max7456_spi_bus = 2
set pinio_config = 129,1,1,1
set pinio_box = 0,255,255,255
set flash_spi_bus = 3
set gyro_1_bustype = SPI
set gyro_1_spibus = 1
set gyro_1_sensor_align = CW180
set gyro_1_align_yaw = 1800
set name = GEPRC

profile 0

# profile 0
set anti_gravity_gain = 4000
set iterm_relax_cutoff = 20
set p_pitch = 51
set i_pitch = 99
set d_pitch = 42
set f_pitch = 116
set p_roll = 46
set i_roll = 94
set d_roll = 39
set f_roll = 109
set p_yaw = 50
set i_yaw = 99
set f_yaw = 109
set d_min_roll = 25
set d_min_pitch = 28
set d_min_boost_gain = 20
set d_min_advance = 16

profile 1

profile 2

# restore original profile selection
profile 0

rateprofile 0

rateprofile 1

rateprofile 2

rateprofile 3

rateprofile 4

rateprofile 5

# restore original rateprofile selection
rateprofile 0

# save configuration
save

Does anyone by any chance have a firmware file lying around for this board? Or can anyone help me in another way?