Hey all,

On the transmitter i dont receive telemetry from the fc

I almost the same setup as in the link:
https://oscarliang.com/build-racing-dron...uadcopter/


My setup:
-- taranis plus x9d

– the indicated omnibus f4 aio osd
– frsky xsr (the smartport and i tried the inverted port)
– latest betaflight BTFL 3.3.2 (Target: OBSD)
– telemetry via smartport uart 3 (tx only, i tried rx bridged, i initialy tried the led but got a error)

I followed: 
https://oscarliang.com/betaflight-soft-s...-smartport
--Enable SoftSerial feature
--Assign SoftSerial TX uart 3
--set tlm_halfduplex = on
--set tlm_inverted = off       ==> also tried on

On my taranis i receive standard telemetry. There is A2 which is wierd. I don't receive anything from x,y,z speeds or any alike. 

I will also add a dump.

# dump


# version
# Betaflight / OMNIBUSF4SD (OBSD) 3.3.2 May  4 2018 / 09:52:25 (64a292f37) MSP API: 1.38

# name
name Dirks

# resources
resource BEEPER 1 B04
resource MOTOR 1 B00
resource MOTOR 2 B01
resource MOTOR 3 A03
resource MOTOR 4 A02
resource MOTOR 5 A01
resource MOTOR 6 A08
resource MOTOR 7 NONE
resource MOTOR 8 NONE
resource SERVO 1 NONE
resource SERVO 2 NONE
resource SERVO 3 NONE
resource SERVO 4 NONE
resource SERVO 5 NONE
resource SERVO 6 NONE
resource SERVO 7 NONE
resource SERVO 8 NONE
resource PPM 1 B08
resource PWM 1 B08
resource PWM 2 B09
resource PWM 3 C06
resource PWM 4 C07
resource PWM 5 C08
resource PWM 6 C09
resource PWM 7 NONE
resource PWM 8 NONE
resource SONAR_TRIGGER 1 A01
resource SONAR_ECHO 1 A08
resource LED_STRIP 1 B06
resource SERIAL_TX 1 A09
resource SERIAL_TX 2 NONE
resource SERIAL_TX 3 NONE
resource SERIAL_TX 4 NONE
resource SERIAL_TX 5 NONE
resource SERIAL_TX 6 C06
resource SERIAL_TX 7 NONE
resource SERIAL_TX 8 NONE
resource SERIAL_TX 9 NONE
resource SERIAL_TX 10 NONE
resource SERIAL_TX 11 B10
resource SERIAL_TX 12 NONE
resource SERIAL_RX 1 A10
resource SERIAL_RX 2 NONE
resource SERIAL_RX 3 B11
resource SERIAL_RX 4 NONE
resource SERIAL_RX 5 NONE
resource SERIAL_RX 6 C07
resource SERIAL_RX 7 NONE
resource SERIAL_RX 8 NONE
resource SERIAL_RX 9 NONE
resource SERIAL_RX 10 NONE
resource SERIAL_RX 11 NONE
resource SERIAL_RX 12 NONE
resource INVERTER 1 NONE
resource INVERTER 2 NONE
resource INVERTER 3 C09
resource INVERTER 4 NONE
resource INVERTER 5 NONE
resource INVERTER 6 C08
resource INVERTER 7 NONE
resource INVERTER 8 NONE
resource INVERTER 9 NONE
resource INVERTER 10 NONE
resource INVERTER 11 NONE
resource INVERTER 12 NONE
resource I2C_SCL 1 NONE
resource I2C_SCL 2 NONE
resource I2C_SCL 3 NONE
resource I2C_SDA 1 NONE
resource I2C_SDA 2 NONE
resource I2C_SDA 3 NONE
resource LED 1 B05
resource LED 2 NONE
resource LED 3 NONE
resource RX_BIND 1 NONE
resource RX_BIND_PLUG 1 NONE
resource TRANSPONDER 1 NONE
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 C12
resource ESCSERIAL 1 B08
resource CAMERA_CONTROL 1 NONE
resource ADC_BATT 1 C02
resource ADC_RSSI 1 A00
resource ADC_CURR 1 C01
resource ADC_EXT 1 NONE
resource BARO_CS 1 B03
resource COMPASS_CS 1 NONE
resource SDCARD_CS 1 B12
resource SDCARD_DETECT 1 B07
resource PINIO 1 NONE
resource PINIO 2 NONE
resource PINIO 3 NONE
resource PINIO 4 NONE

# mixer
mixer QUADX

mmix reset


# servo
servo 0 1000 2000 1500 100 -1
servo 1 1000 2000 1500 100 -1
servo 2 1000 2000 1500 100 -1
servo 3 1000 2000 1500 100 -1
servo 4 1000 2000 1500 100 -1
servo 5 1000 2000 1500 100 -1
servo 6 1000 2000 1500 100 -1
servo 7 1000 2000 1500 100 -1

# servo mix
smix reset



# feature
feature -RX_PPM
feature -INFLIGHT_ACC_CAL
feature -RX_SERIAL
feature -MOTOR_STOP
feature -SERVO_TILT
feature -SOFTSERIAL
feature -GPS
feature -RANGEFINDER
feature -TELEMETRY
feature -3D
feature -RX_PARALLEL_PWM
feature -RX_MSP
feature -RSSI_ADC
feature -LED_STRIP
feature -DISPLAY
feature -OSD
feature -CHANNEL_FORWARDING
feature -TRANSPONDER
feature -AIRMODE
feature -RX_SPI
feature -SOFTSPI
feature -ESC_SENSOR
feature -ANTI_GRAVITY
feature -DYNAMIC_FILTER
feature RX_SERIAL
feature MOTOR_STOP
feature SOFTSERIAL
feature TELEMETRY
feature OSD

# beeper
beeper GYRO_CALIBRATED
beeper RX_LOST
beeper RX_LOST_LANDING
beeper DISARMING
beeper ARMING
beeper ARMING_GPS_FIX
beeper BAT_CRIT_LOW
beeper BAT_LOW
beeper GPS_STATUS
beeper RX_SET
beeper ACC_CALIBRATION
beeper ACC_CALIBRATION_FAIL
beeper READY_BEEP
beeper MULTI_BEEPS
beeper DISARM_REPEAT
beeper ARMED
beeper SYSTEM_INIT
beeper ON_USB
beeper BLACKBOX_ERASE
beeper CRASH FLIP
beeper CAM_CONNECTION_OPEN
beeper CAM_CONNECTION_CLOSED

# map
map AETR1234

# serial
serial 20 1 115200 57600 0 115200
serial 0 0 115200 57600 0 115200
serial 2 0 115200 57600 0 115200
serial 5 64 115200 57600 0 115200
serial 30 32 115200 57600 0 115200

# led
led 0 0,0::C:0
led 1 0,0::C:0
led 2 0,0::C:0
led 3 0,0::C:0
led 4 0,0::C:0
led 5 0,0::C:0
led 6 0,0::C:0
led 7 0,0::C:0
led 8 0,0::C:0
led 9 0,0::C:0
led 10 0,0::C:0
led 11 0,0::C:0
led 12 0,0::C:0
led 13 0,0::C:0
led 14 0,0::C:0
led 15 0,0::C:0
led 16 0,0::C:0
led 17 0,0::C:0
led 18 0,0::C:0
led 19 0,0::C:0
led 20 0,0::C:0
led 21 0,0::C:0
led 22 0,0::C:0
led 23 0,0::C:0
led 24 0,0::C:0
led 25 0,0::C:0
led 26 0,0::C:0
led 27 0,0::C:0
led 28 0,0::C:0
led 29 0,0::C:0
led 30 0,0::C:0
led 31 0,0::C:0

# color
color 0 0,0,0
color 1 0,255,255
color 2 0,0,255
color 3 30,0,255
color 4 60,0,255
color 5 90,0,255
color 6 120,0,255
color 7 150,0,255
color 8 180,0,255
color 9 210,0,255
color 10 240,0,255
color 11 270,0,255
color 12 300,0,255
color 13 330,0,255
color 14 0,0,0
color 15 0,0,0

# mode_color
mode_color 0 0 1
mode_color 0 1 11
mode_color 0 2 2
mode_color 0 3 13
mode_color 0 4 10
mode_color 0 5 3
mode_color 1 0 5
mode_color 1 1 11
mode_color 1 2 3
mode_color 1 3 13
mode_color 1 4 10
mode_color 1 5 3
mode_color 2 0 10
mode_color 2 1 11
mode_color 2 2 4
mode_color 2 3 13
mode_color 2 4 10
mode_color 2 5 3
mode_color 3 0 8
mode_color 3 1 11
mode_color 3 2 4
mode_color 3 3 13
mode_color 3 4 10
mode_color 3 5 3
mode_color 4 0 7
mode_color 4 1 11
mode_color 4 2 3
mode_color 4 3 13
mode_color 4 4 10
mode_color 4 5 3
mode_color 5 0 9
mode_color 5 1 11
mode_color 5 2 2
mode_color 5 3 13
mode_color 5 4 10
mode_color 5 5 3
mode_color 6 0 6
mode_color 6 1 10
mode_color 6 2 1
mode_color 6 3 0
mode_color 6 4 0
mode_color 6 5 2
mode_color 6 6 3
mode_color 6 7 6
mode_color 6 8 0
mode_color 6 9 0
mode_color 6 10 0
mode_color 7 0 3

# aux
aux 0 0 0 1900 2100 0
aux 1 1 1 900 1100 0
aux 2 2 255 1400 1600 0
aux 3 13 3 1900 2100 0
aux 4 28 255 1400 1600 0
aux 5 0 0 900 900 0
aux 6 0 0 900 900 0
aux 7 0 0 900 900 0
aux 8 0 0 900 900 0
aux 9 0 0 900 900 0
aux 10 0 0 900 900 0
aux 11 0 0 900 900 0
aux 12 0 0 900 900 0
aux 13 0 0 900 900 0
aux 14 0 0 900 900 0
aux 15 0 0 900 900 0
aux 16 0 0 900 900 0
aux 17 0 0 900 900 0
aux 18 0 0 900 900 0
aux 19 0 0 900 900 0

# adjrange
adjrange 0 0 0 900 900 0 0
adjrange 1 0 0 900 900 0 0
adjrange 2 0 0 900 900 0 0
adjrange 3 0 0 900 900 0 0
adjrange 4 0 0 900 900 0 0
adjrange 5 0 0 900 900 0 0
adjrange 6 0 0 900 900 0 0
adjrange 7 0 0 900 900 0 0
adjrange 8 0 0 900 900 0 0
adjrange 9 0 0 900 900 0 0
adjrange 10 0 0 900 900 0 0
adjrange 11 0 0 900 900 0 0
adjrange 12 0 0 900 900 0 0
adjrange 13 0 0 900 900 0 0
adjrange 14 0 0 900 900 0 0

# rxrange
rxrange 0 1000 2000
rxrange 1 1000 2000
rxrange 2 1000 2000
rxrange 3 1000 2000

# vtx
vtx 0 0 0 0 900 900
vtx 1 0 0 0 900 900
vtx 2 0 0 0 900 900
vtx 3 0 0 0 900 900
vtx 4 0 0 0 900 900
vtx 5 0 0 0 900 900
vtx 6 0 0 0 900 900
vtx 7 0 0 0 900 900
vtx 8 0 0 0 900 900
vtx 9 0 0 0 900 900

# rxfail
rxfail 0 a
rxfail 1 a
rxfail 2 a
rxfail 3 a
rxfail 4 h
rxfail 5 h
rxfail 6 h
rxfail 7 h
rxfail 8 h
rxfail 9 h
rxfail 10 h
rxfail 11 h
rxfail 12 h
rxfail 13 h
rxfail 14 h
rxfail 15 h
rxfail 16 h
rxfail 17 h

# master
set align_gyro = DEFAULT
set gyro_lpf = OFF
set gyro_sync_denom = 1
set gyro_lowpass_type = PT1
set gyro_lowpass_hz = 90
set gyro_notch1_hz = 400
set gyro_notch1_cutoff = 300
set gyro_notch2_hz = 200
set gyro_notch2_cutoff = 100
set gyro_stage2_lowpass_hz = 0
set moron_threshold = 48
set gyro_offset_yaw = 0
set gyro_overflow_detect = ALL
set gyro_use_32khz = OFF
set align_acc = DEFAULT
set acc_hardware = AUTO
set acc_lpf_hz = 10
set acc_trim_pitch = 0
set acc_trim_roll = 0
set align_mag = DEFAULT
set mag_bustype = I2C
set mag_i2c_device = 2
set mag_i2c_address = 0
set mag_spi_device = 0
set mag_hardware = NONE
set mag_declination = 0
set magzero_x = 0
set magzero_y = 0
set magzero_z = 0
set baro_bustype = SPI
set baro_spi_device = 3
set baro_i2c_device = 0
set baro_i2c_address = 0
set baro_hardware = AUTO
set baro_tab_size = 21
set baro_noise_lpf = 600
set baro_cf_vel = 985
set baro_cf_alt = 965
set mid_rc = 1500
set min_check = 1050
set max_check = 1900
set rssi_channel = 0
set rssi_scale = 41
set rssi_invert = OFF
set rc_interp = AUTO
set rc_interp_ch = RP
set rc_interp_int = 19
set fpv_mix_degrees = 20
set max_aux_channels = 14
set serialrx_provider = SBUS
set serialrx_inverted = OFF
set spektrum_sat_bind = 0
set spektrum_sat_bind_autoreset = ON
set airmode_start_throttle_percent = 32
set rx_min_usec = 885
set rx_max_usec = 2115
set serialrx_halfduplex = OFF
set adc_device = 2
set input_filtering_mode = OFF
set blackbox_p_ratio = 32
set blackbox_device = SDCARD
set blackbox_record_acc = ON
set blackbox_mode = NORMAL
set min_throttle = 1070
set max_throttle = 2000
set min_command = 1000
set dshot_idle_value = 450
set dshot_burst = ON
set use_unsynced_pwm = ON
set motor_pwm_protocol = ONESHOT125
set motor_pwm_rate = 2000
set motor_pwm_inversion = OFF
set thr_corr_value = 0
set thr_corr_angle = 800
set failsafe_delay = 4
set failsafe_off_delay = 10
set failsafe_throttle = 1000
set failsafe_kill_switch = OFF
set failsafe_throttle_low_delay = 100
set failsafe_procedure = DROP
set align_board_roll = 0
set align_board_pitch = 0
set align_board_yaw = 0
set gimbal_mode = NORMAL
set bat_capacity = 0
set vbat_max_cell_voltage = 43
set vbat_full_cell_voltage = 41
set vbat_min_cell_voltage = 33
set vbat_warning_cell_voltage = 35
set vbat_hysteresis = 1
set current_meter = ADC
set battery_meter = ADC
set vbat_detect_cell_voltage = 30
set use_vbat_alerts = ON
set use_cbat_alerts = OFF
set cbat_alert_percent = 10
set vbat_cutoff_percent = 100
set vbat_scale = 110
set vbat_divider = 10
set vbat_multiplier = 1
set ibata_scale = 400
set ibata_offset = 0
set ibatv_scale = 0
set ibatv_offset = 0
set beeper_inversion = ON
set beeper_od = OFF
set beeper_frequency = 0
set beeper_dshot_beacon_tone = 0
set yaw_motors_reversed = OFF
set 3d_deadband_low = 1406
set 3d_deadband_high = 1514
set 3d_neutral = 1460
set 3d_deadband_throttle = 50
set 3d_switched_mode = OFF
set servo_center_pulse = 1500
set servo_pwm_rate = 50
set servo_lowpass_hz = 0
set tri_unarmed_servo = ON
set channel_forwarding_start = 4
set reboot_character = 82
set serial_update_rate_hz = 100
set accxy_deadband = 40
set accz_deadband = 40
set acc_unarmedcal = ON
set imu_dcm_kp = 2500
set imu_dcm_ki = 0
set small_angle = 25
set auto_disarm_delay = 5
set gyro_cal_on_first_arm = OFF
set gps_provider = NMEA
set gps_sbas_mode = AUTO
set gps_auto_config = ON
set gps_auto_baud = OFF
set gps_wp_radius = 200
set nav_controls_heading = ON
set nav_speed_min = 100
set nav_speed_max = 300
set nav_slew_rate = 30
set fixedwing_althold_reversed = OFF
set alt_hold_deadband = 40
set alt_hold_fast_change = ON
set deadband = 0
set yaw_deadband = 0
set yaw_control_reversed = OFF
set pid_process_denom = 4
set runaway_takeoff_prevention = ON
set runaway_takeoff_deactivate_delay = 500
set runaway_takeoff_deactivate_throttle_percent = 25
set tlm_switch = OFF
set tlm_inverted = ON
set tlm_halfduplex = ON
set frsky_default_lat = 0
set frsky_default_long = 0
set frsky_gps_format = 0
set frsky_unit = IMPERIAL
set frsky_vfas_precision = 0
set hott_alarm_int = 5
set pid_in_tlm = OFF
set report_cell_voltage = OFF
set ibus_sensor = 1,2,3,0,0,0,0,0,0,0,0,0,0,0,0
set ledstrip_visual_beeper = OFF
set sdcard_dma = OFF
set osd_units = METRIC
set osd_warnings = -1
set osd_rssi_alarm = 20
set osd_cap_alarm = 2200
set osd_alt_alarm = 100
set osd_ah_max_pit = 20
set osd_ah_max_rol = 40
set osd_tim1 = 2560
set osd_tim2 = 2561
set osd_vbat_pos = 2199
set osd_rssi_pos = 2209
set osd_tim_1_pos = 2177
set osd_tim_2_pos = 2145
set osd_remaining_time_estimate_pos = 234
set osd_flymode_pos = 234
set osd_throttle_pos = 234
set osd_vtx_channel_pos = 234
set osd_crosshairs_pos = 234
set osd_ah_sbar_pos = 2282
set osd_ah_pos = 2282
set osd_current_pos = 234
set osd_mah_drawn_pos = 234
set osd_craft_name_pos = 234
set osd_gps_speed_pos = 234
set osd_gps_lon_pos = 234
set osd_gps_lat_pos = 234
set osd_gps_sats_pos = 234
set osd_home_dir_pos = 234
set osd_home_dist_pos = 234
set osd_compass_bar_pos = 234
set osd_altitude_pos = 2167
set osd_pid_roll_pos = 234
set osd_pid_pitch_pos = 234
set osd_pid_yaw_pos = 234
set osd_debug_pos = 234
set osd_power_pos = 234
set osd_pidrate_profile_pos = 234
set osd_warnings_pos = 2441
set osd_avg_cell_voltage_pos = 234
set osd_pit_ang_pos = 2360
set osd_rol_ang_pos = 2328
set osd_battery_usage_pos = 2409
set osd_disarmed_pos = 234
set osd_nheading_pos = 234
set osd_nvario_pos = 234
set osd_esc_tmp_pos = 234
set osd_esc_rpm_pos = 234
set osd_rtc_date_time_pos = 234
set osd_adjustment_range_pos = 234
set osd_core_temp_pos = 234
set osd_stat_max_spd = ON
set osd_stat_max_dist = OFF
set osd_stat_min_batt = ON
set osd_stat_min_rssi = ON
set osd_stat_max_curr = ON
set osd_stat_used_mah = ON
set osd_stat_max_alt = OFF
set osd_stat_bbox = ON
set osd_stat_endbatt = OFF
set osd_stat_bb_no = ON
set osd_stat_rtc_date_time = OFF
set osd_stat_tim_1 = ON
set osd_stat_tim_2 = ON
set task_statistics = ON
set debug_mode = NONE
set rate_6pos_switch = OFF
set cpu_overclock = OFF
set pwr_on_arm_grace = 5
set vtx_band = 4
set vtx_channel = 1
set vtx_power = 1
set vtx_low_power_disarm = OFF
set vtx_freq = 5740
set vtx_pit_mode_freq = 0
set vtx_halfduplex = ON
set vcd_video_system = 0
set vcd_h_offset = 0
set vcd_v_offset = 0
set max7456_clock = DEFAULT
set displayport_msp_col_adjust = 0
set displayport_msp_row_adjust = 0
set displayport_max7456_col_adjust = 0
set displayport_max7456_row_adjust = 0
set displayport_max7456_inv = OFF
set displayport_max7456_blk = 0
set displayport_max7456_wht = 2
set esc_sensor_halfduplex = OFF
set led_inversion = 0
set dashboard_i2c_bus = 2
set dashboard_i2c_addr = 60
set camera_control_mode = HARDWARE_PWM
set camera_control_ref_voltage = 330
set camera_control_key_delay = 180
set camera_control_internal_resistance = 470
set rangefinder_hardware = NONE
set pinio_config = 1,1,1,1
set pinio_box = 255,255,255,255

# profile
profile 0

set dterm_lowpass_type = BIQUAD
set dterm_lowpass = 100
set dterm_notch_hz = 260
set dterm_notch_cutoff = 160
set vbat_pid_gain = OFF
set pid_at_min_throttle = ON
set anti_gravity_threshold = 350
set anti_gravity_gain = 1000
set setpoint_relax_ratio = 100
set dterm_setpoint_weight = 0
set acc_limit_yaw = 100
set acc_limit = 0
set crash_dthreshold = 50
set crash_gthreshold = 400
set crash_setpoint_threshold = 350
set crash_time = 500
set crash_delay = 0
set crash_recovery_angle = 10
set crash_recovery_rate = 100
set crash_limit_yaw = 200
set crash_recovery = OFF
set iterm_windup = 50
set iterm_limit = 150
set pidsum_limit = 500
set pidsum_limit_yaw = 400
set yaw_lowpass = 0
set p_pitch = 58
set i_pitch = 50
set d_pitch = 35
set p_roll = 40
set i_roll = 40
set d_roll = 30
set p_yaw = 70
set i_yaw = 45
set d_yaw = 20
set p_alt = 50
set i_alt = 0
set d_alt = 0
set p_vel = 55
set i_vel = 55
set d_vel = 75
set p_level = 50
set i_level = 50
set d_level = 75
set level_limit = 55
set horizon_tilt_effect = 75
set horizon_tilt_expert_mode = OFF
set gps_pos_p = 15
set gps_pos_i = 0
set gps_pos_d = 0
set gps_posr_p = 34
set gps_posr_i = 14
set gps_posr_d = 53
set gps_nav_p = 25
set gps_nav_i = 33
set gps_nav_d = 83

# rateprofile
rateprofile 0

set thr_mid = 50
set thr_expo = 0
set rates_type = BETAFLIGHT
set roll_rc_rate = 100
set pitch_rc_rate = 100
set yaw_rc_rate = 100
set roll_expo = 0
set pitch_expo = 0
set yaw_expo = 0
set roll_srate = 70
set pitch_srate = 70
set yaw_srate = 70
set tpa_rate = 10
set tpa_breakpoint = 1650

# 
# 

You have dedicated TX3 pad, you don't need softserial.
Change your resource back to default.

Wire hacked S. Port to TX3 on FC. Turn on S. Port for UART3.
Discover new sensor in Taranis. It should work.

(04-Jun-2018, 10:44 PM)voodoo614 Wrote: You have dedicated TX3 pad, you don't need softserial.
Change your resource back to default.

Wire hacked S. Port to TX3 on FC. Turn on S. Port for UART3.
Discover new sensor in Taranis. It should work.

So just so i know i translated this right.

in the cli run:
resource SERIAL_TX 3 B10

wire hacked: is that the inverted sport on the xsr? I already soldered a wire to that. So it is easy.
Turn on smartport for the uart3 and turn it off for the softserial.
Should I disable softserial?
About the inverted telemetry setting. How should that be? does it matter?


Just for my understanding what is the difference between softserial and not using the softserial? Is that a different protocol? Is there somewhere this is explained?

a lot of questions. This normally is plug and play. Just read the manual. But if things dont work i like to know everything

Softserial uses CPU power to emulate a serial port. Think of it as a virtual serial port. Main reason to use softserial is when you runout of hardware serial. The other reason some use softserial is to not have to hack the non-inverted signal.

Everything you mentioned is correct. I would turn off softserial. I am also assuming that B10 is the original resource for serial TX 3.

As for tlm_inverted should be off. And tlm_halfduplex is on.

If it doesn't work, you want to try different combinations.

Make sure you hack the non-inverted S. Port and not SBUS.

(05-Jun-2018, 08:40 AM)voodoo614 Wrote: Softserial uses CPU power to emulate a serial port. Think of it as a virtual serial port. Main reason to use softserial is when you runout of hardware serial. The other reason some use softserial is to not have to hack the non-inverted signal.

Everything you mentioned is correct. I would turn off softserial. I am also assuming that B10 is the original resource for serial TX 3.

As for tlm_inverted should be off. And tlm_halfduplex is on.

If it doesn't work, you want to try different combinations.

Make sure you hack the non-inverted S. Port and not SBUS.

Thank you for explaining. Thus the tlm_inverted is something else then an inverted smartport. 

I used the red arrow 
https://oscarliang.com/uninverted-sbus-s...receivers/

And should i bridge the rx and tx? What is the purpose of doing this?

Bart

If you are using the "uninverted Smartport" signal (red arrow) then you don't need softserial at all.
No need to bridge RX and TX, that was something you needed to do with F1 flight controllers, not F4.
If still no luck, try flashing the board again with erase settings checked. Maybe you changed some thing on the board the prevents it to work...

Normal sbus and S. Port are inherently inverted signal. The hack signal, whether the yellow or red arrow are the non-inverted or uninverted signal. Both cases, these are the referraling to the source signal.

When people refer to the FC input pad, there are normal UART pads and there are inverted pad. For example, sbus source is inherently inverted. So if you solder to a dedicated sbus pad on the FC, this pad will have an inversion circuit that changes the inverted signal back to a normal or uninverted signal.

As for telemetry, most FC do not have a second hardware inverted TX pad. That's why you need to hack your receiver to get the non-inverted signal because you are just wiring it to a normal UART. This is all only applies to F4 FC. If you are using F3 or F7 FC, you can change any UART pad to inverted or normal through BFC. You can do the same with softserial.

(05-Jun-2018, 03:53 PM)voodoo614 Wrote: Normal sbus and S. Port are inherently inverted signal. The hack signal, whether the yellow or red arrow are the non-inverted or uninverted signal. Both cases, these are the referraling to the source signal.

When people refer to the FC input pad, there are normal UART pads and there are inverted pad. For example, sbus source is inherently inverted. So if you solder to a dedicated sbus pad on the FC, this pad will have an inversion circuit that changes the inverted signal back to a normal or uninverted signal.

As for telemetry, most FC do not have a second hardware inverted TX pad. That's why you need to hack your receiver to get the non-inverted signal because you are just wiring it to a normal UART. This is all only applies to F4 FC. If you are using F3 or F7 FC, you can change any UART pad to inverted or normal through BFC. You can do the same with softserial.

Hey Voodoo and Oscar.

Thank you very much. It worked in one go!!!!

I have been messing around with this for too many days. Should have asked earlier.

This is what i did:


- in cli:  resource SERIAL_TX 3 B10
- in cli: set tlm_halfduplex = on
- in cli: set tlm_inverted = off
- turn off softserial
- turn on smartport on the uart3
- use the hacked smartport on the xsr (non inverted smartport)

- turn on transmitter
- plugin lipo
- discover telemetry!!!!

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Great.