F405STD no GPS Fix

[HJOGermany]

Hello

i have a new F405STD Board connectes with a BN880 GPS. In the Setup Tab the Icon ist blue an in the GPS Tap i see that there is Traffic between GPS an FC.

But i cant get a GPS Fix. Waiting 15min (Cold Start) on my Field but nothing. Inav 1.9.1 and newer Versions.

GPS tested in my Wing, its OK

Can somebody help me?

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version

INAV/MATEKF405 1.9.1 Apr 21 2018 / 13:25:29 (03a5c1922)

resources

mixer

servo mix

servo

feature

feature -TX_PROF_SEL feature SOFTSERIAL feature GPS feature RSSI_ADC feature AIRMODE feature PWM_OUTPUT_ENABLE

beeper

map

map TAER

name

name Chamäleon

serial

serial 1 0 115200 38400 0 115200 serial 2 64 115200 57600 0 115200 serial 3 2 115200 57600 0 115200 serial 4 1024 115200 38400 0 115200

led

color

mode_color

aux

aux 0 0 1 1300 1700 aux 1 1 3 900 1300 aux 2 2 0 1300 1700 aux 3 9 8 900 1300 aux 4 8 8 1700 2100 aux 5 19 5 900 1300 aux 6 11 2 925 1325 aux 7 29 6 900 1300 aux 8 30 0 900 1300 aux 9 31 7 900 1300

adjrange

rxrange

master

set looptime = 2000 set gyro_sync = ON set gyro_hardware_lpf = 188HZ set gyro_lpf_hz = 90 set gyro_notch1_hz = 200 set gyro_notch1_cutoff = 100 set acc_hardware = MPU6500 set acczero_x = 1 set acczero_y = -57 set acczero_z = 17 set accgain_x = 4089 set accgain_y = 4082 set accgain_z = 4090 set mag_hardware = HMC5883 set magzero_x = -42 set magzero_y = -108 set magzero_z = -313 set baro_hardware = BMP280 set pitot_hardware = NONE set serialrx_provider = FPORT set serialrx_halfduplex = ON set motor_pwm_rate = 2000 set motor_pwm_protocol = MULTISHOT set failsafe_procedure = RTH set vbat_max_cell_voltage = 420 set gps_sbas_mode = AUTO set gps_ublox_use_galileo = ON set inav_w_z_baro_p = 0.350 set nav_extra_arming_safety = OFF set nav_rth_tail_first = ON set nav_rth_allow_landing = FS_ONLY set nav_rth_altitude = 3000 set osd_video_system = 2 set osd_main_voltage_pos = 2091 set osd_rssi_pos = 2105 set osd_flymode_pos = 2413 set osd_throttle_pos = 65 set osd_horizon_sidebars_pos = 200 set osd_current_draw_pos = 97 set osd_mah_drawn_pos = 129 set osd_gps_sats_pos = 2082 set osd_gps_lon_pos = 2433 set osd_gps_lat_pos = 2401 set osd_home_dir_pos = 2254 set osd_altitude_pos = 2209 set osd_ontime_flytime_pos = 2421

profile

profile 1

set mc_p_pitch = 58 set mc_i_pitch = 50 set mc_d_pitch = 22 set mc_p_roll = 43 set mc_i_roll = 40 set mc_d_roll = 20 set mc_p_yaw = 70 set dterm_lpf_hz = 80 set dterm_notch_hz = 200 set dterm_notch_cutoff = 100 set roll_rate = 50 set pitch_rate = 50 set yaw_rate = 45`

[digitalentity]

Are you using Runcam Split camera? How is your GPS mounted? Please send a picture of your setup

[HJOGermany]

Yes, I use a V1. The GPS ist mounted at the place where normally mounted a external Cam.

[digitalentity]

Most action cameras are known to mess up GPS https://github.com/iNavFlight/inav/issues/3643#issuecomment-408101542

[HJOGermany]

Ok my Englisch is Not so Good that I understand the posts in your link. It is right that you mean the Split makes that the GPS isn't running? Can I save it with Alloy foil or must I solder out the Split?

[shellixyz]

Your GPS in the picture is upside down. The antenna needs to point to the sky. The grey/pale pink/silver square. The first thing is to fix this.

For shielding you can try with some mumetal foil if you can find some, not sure it would help. The best would be to isolate the Split electrically (separate BEC) and also put the GPS as far away as possible from it.

[teckel12]

@shellixyz Good catch.

[HJOGermany]

@shellixyz: Thank You That was it 😁

I cut off the power of the Split and after 2mins I have 3D Fix

Now I must test how I can shield the Split.

Thank You