Incorrect heading displayed by the compass

[nbrachet]

With the following MAVLink message:
SEQ:110 SYSID: 1 COMPID: 1 - VFR_HUD: airspeed=0.71 groundspeed=0.71 alt=15.34 climb=0.01 heading=153 throttle=0

Compass shows a heading of 0 (North).

[nbrachet]

Broken again in 0.1.4.4

[nab0y4enko]

It works correctly in v0.2

[nab0y4enko]

Please provide tlog for testing

[nab0y4enko]

in a file 2015-07-16 15-03-27.tlog no information about MAVLINK_MSG_ID_VFR_HUD.
In previous logs this information has been.

[nbrachet]

MAVLINK_MSG_ID_VFR_HUD is sent if the app requests it via a REQUEST_DATA_STREAM/EXTRA2:

GCS: SEQ:  4 SYSID:252 COMPID:  1 - REQUEST_DATA_STREAM: req_message_rate=2 target_system=1 target_component=0 req_stream_id=EXTRA2 START

This message should be sent every time the connection is established.

Technically, REQUEST_DATA_STREAM/EXTENDED_STATUS should also be sent to receive GPS_RAW_INT messages:

GCS: SEQ: 14 SYSID:252 COMPID:  1 - REQUEST_DATA_STREAM: req_message_rate=2 target_system=1 target_component=0 req_stream_id=EXTENDED_STATUS START

See GCS_Mavlink.cpp for reference.

[nab0y4enko]

Done in 0.2.5.5

[nbrachet]

I don't see it:

/dev/ttyAMA0 opened
Logging to /var/log/tlogs/2015-07-22 11-48-37.tlog
Connecting to 108.26.177.27:5555
Connected to 108.26.177.27:5555 via 192.168.2.159:59797
GCS connection
UAS sysid=1
UAS: SEQ:159 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
UAS is in STANDBY
UAS control mode STABILIZE
UAS is DISARMED
UAS: SYS_STATUS: onboard_control_sensors_present=(3D_GYRO|3D_ACCEL|3D_MAG|ABSOLUTE_PRESSURE|GPS|ANGULAR_RATE_CONTROL|ATTITUDE_STABILIZATION|YAW_POSITION|Z_ALTITUDE_CONTROL|XY_POSITION_CONTROL|MOTOR_OUTPUTS|AHRS|TERRAIN) onboard_control_sensors_enabled=!(Z_ALTITUDE_CONTROL&XY_POSITION_CONTROL) onboard_control_sensors_health=(*all*) load=2,611.2% voltage_battery=11.403V current_battery=0.39A drop_rate_comm=0.00% errors_comm=0 errors_count1=0 errors_count2=0 errors_count3=0 errors_count4=0 battery_remaining=99%
UAS: SEQ:170 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
UAS: SEQ:183 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
UAS: SEQ:197 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
UAS: SEQ:209 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
   : loadavg: 0.10 0.21 0.21 1/73 3475
UAS: SEQ:222 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
GCS: SEQ: 32 SYSID:252 COMPID:  0 - HEARTBEAT: custom_mode=0 type=GCS autopilot=INVALID base_mode=MANUAL_INPUT|ARMED system_status=ACTIVE mavlink_version=3
UAS: SEQ:234 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
GCS: SEQ: 33 SYSID:252 COMPID:  0 - HEARTBEAT: custom_mode=0 type=GCS autopilot=INVALID base_mode=MANUAL_INPUT|ARMED system_status=ACTIVE mavlink_version=3
UAS: SEQ:246 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
GCS: SEQ: 34 SYSID:252 COMPID:  0 - HEARTBEAT: custom_mode=0 type=GCS autopilot=INVALID base_mode=MANUAL_INPUT|ARMED system_status=ACTIVE mavlink_version=3
UAS: SEQ:  2 SYSID:  1 COMPID:  1 - HEARTBEAT: custom_mode=0 (STABILIZE) type=HEXAROTOR autopilot=ARDUPILOTMEGA base_mode=CUSTOM_MODE|STABILIZE|MANUAL_INPUT system_status=STANDBY mavlink_version=3
GCS: SEQ: 35 SYSID:252 COMPID:  0 - HEARTBEAT: custom_mode=0 type=GCS autopilot=INVALID base_mode=MANUAL_INPUT|ARMED system_status=ACTIVE mavlink_version=3

This happens after the connection is lost -- ie. no heartbeat for a while.
As mention above: This message [REQUEST_DATA_STREAM] should be sent every time the connection is established.