OSD

OSD (On Screen Display)

The On Screen Display, or OSD, is a feature that overlays flight data over the video image. This can be done on the flight controller, using the analogue MAX7456 chip. Digital systems take the OSD data via MSP DisplayPort and send it to the video transmitter; which combines the data with the image. You can specify what elements are displayed, and their locations on the image. Most systems are character based and use the MAX7456 analogue setup or MSP DisplayPort. There are also some other systems that are supported such as the canvas based FrSKY PixelOSD on analogue. Canvas OSDs draw shapes on the image whereas character based OSDs use font characters to display the data.

General OSD information is in this document. Other documents cover specific OSD-related topics:

• Custom OSD Elements
• OSD Hud and ESP32 radars
• OSD Joystick
• DJI compatible OSD.md
• Pixel OSD FAQ

Features and Limitations

Not all OSDs are created equally. This table shows the differences between the different systems available.

OSD System	Character grid	Character	Canvas	MSP DisplayPort	All elements supported
Analogue PAL	30 x 16	X			YES
Analogue NTSC	30 x 13	X			YES
PixelOSD	As PAL or NTSC		X		YES
DJI OSD	30 x 16	X			NO - BF Characters only
DJI WTFOS	60 x 22	X		X	YES
HDZero	50 x 18	X		X	YES
Avatar	53 x 20	X		X	YES
DJI O3 Goggles V2 + WTFOS	53 x 20	X		X	YES
DJI Goggles 2 and newer	53 x 20 (HD)	X		X	YES (no custom fonts)

OSD Elements

Here are the OSD Elements provided by INAV.

ID	Element	Added	Notes
0	OSD_RSSI_VALUE	1.0.0
1	OSD_MAIN_BATT_VOLTAGE	1.0.0
2	OSD_CROSSHAIRS	1.0.0
3	OSD_ARTIFICIAL_HORIZON	1.0.0
4	OSD_HORIZON_SIDEBARS	1.0.0
5	OSD_ONTIME	1.0.0
6	OSD_FLYTIME	1.0.0
7	OSD_FLYMODE	1.0.0
8	OSD_CRAFT_NAME	1.0.0
9	OSD_THROTTLE_POS	1.0.0
10	OSD_VTX_CHANNEL	1.0.0
11	OSD_CURRENT_DRAW	1.0.0
12	OSD_MAH_DRAWN	1.0.0
13	OSD_GPS_SPEED	1.0.0
14	OSD_GPS_SATS	1.0.0
15	OSD_ALTITUDE	1.0.0
16	OSD_ROLL_PIDS	1.6.0
17	OSD_PITCH_PIDS	1.6.0
18	OSD_YAW_PIDS	1.6.0
19	OSD_POWER	1.6.0
20	OSD_GPS_LON	1.6.0
21	OSD_GPS_LAT	1.6.0
22	OSD_HOME_DIR	1.6.0
23	OSD_HOME_DIST	1.6.0
24	OSD_HEADING	1.6.0
25	OSD_VARIO	1.6.0
26	OSD_VERTICAL_SPEED_INDICATOR	1.6.0
27	OSD_AIR_SPEED	1.7.3
28	OSD_ONTIME_FLYTIME	1.8.0
29	OSD_RTC_TIME	1.8.0
30	OSD_MESSAGES	1.8.0
31	OSD_GPS_HDOP	1.8.0
32	OSD_MAIN_BATT_CELL_VOLTAGE	1.8.0
33	OSD_SCALED_THROTTLE_POS	1.8.0
34	OSD_HEADING_GRAPH	1.8.0
35	OSD_EFFICIENCY_MAH_PER_KM	1.9.0
36	OSD_WH_DRAWN	1.9.0
37	OSD_BATTERY_REMAINING_CAPACITY	1.9.0
38	OSD_BATTERY_REMAINING_PERCENT	1.9.0
39	OSD_EFFICIENCY_WH_PER_KM	1.9.0
40	OSD_TRIP_DIST	1.9.1
41	OSD_ATTITUDE_PITCH	2.0.0
42	OSD_ATTITUDE_ROLL	2.0.0
43	OSD_MAP_NORTH	2.0.0
44	OSD_MAP_TAKEOFF	2.0.0
45	OSD_RADAR	2.0.0
46	OSD_WIND_SPEED_HORIZONTAL	2.0.0
47	OSD_WIND_SPEED_VERTICAL	2.0.0
48	OSD_REMAINING_FLIGHT_TIME_BEFORE_RTH	2.0.0
49	OSD_REMAINING_DISTANCE_BEFORE_RTH	2.0.0
50	OSD_HOME_HEADING_ERROR	2.0.0
51	OSD_COURSE_HOLD_ERROR	2.0.0
52	OSD_COURSE_HOLD_ADJUSTMENT	2.0.0
53	OSD_SAG_COMPENSATED_MAIN_BATT_VOLTAGE	2.0.0
54	OSD_MAIN_BATT_SAG_COMPENSATED_CELL_VOLTAGE	2.0.0
55	OSD_POWER_SUPPLY_IMPEDANCE	2.0.0
56	OSD_LEVEL_PIDS	2.0.0
57	OSD_POS_XY_PIDS	2.0.0
58	OSD_POS_Z_PIDS	2.0.0
59	OSD_VEL_XY_PIDS	2.0.0
60	OSD_VEL_Z_PIDS	2.0.0
61	OSD_HEADING_P	2.0.0
62	OSD_BOARD_ALIGN_ROLL	2.0.0
63	OSD_BOARD_ALIGN_PITCH	2.0.0
64	OSD_RC_EXPO	2.0.0
65	OSD_RC_YAW_EXPO	2.0.0
66	OSD_THROTTLE_EXPO	2.0.0
67	OSD_PITCH_RATE	2.0.0
68	OSD_ROLL_RATE	2.0.0
69	OSD_YAW_RATE	2.0.0
70	OSD_MANUAL_RC_EXPO	2.0.0
71	OSD_MANUAL_RC_YAW_EXPO	2.0.0
72	OSD_MANUAL_PITCH_RATE	2.0.0
73	OSD_MANUAL_ROLL_RATE	2.0.0
74	OSD_MANUAL_YAW_RATE	2.0.0
75	OSD_NAV_FW_CRUISE_THR	2.0.0
76	OSD_NAV_FW_PITCH2THR	2.0.0
77	OSD_FW_MIN_THROTTLE_DOWN_PITCH_ANGLE	2.0.0
78	OSD_DEBUG	2.0.0
79	OSD_FW_ALT_PID_OUTPUTS	2.0.0
80	OSD_FW_POS_PID_OUTPUTS	2.0.0
81	OSD_MC_VEL_X_PID_OUTPUTS	2.0.0
82	OSD_MC_VEL_Y_PID_OUTPUTS	2.0.0
83	OSD_MC_VEL_Z_PID_OUTPUTS	2.0.0
84	OSD_MC_POS_XYZ_P_OUTPUTS	2.0.0
85	OSD_3D_SPEED	2.1.0
86	OSD_IMU_TEMPERATURE	2.1.0
87	OSD_BARO_TEMPERATURE	2.1.0
88	OSD_TEMP_SENSOR_0_TEMPERATURE	2.1.0
89	OSD_TEMP_SENSOR_1_TEMPERATURE	2.1.0
90	OSD_TEMP_SENSOR_2_TEMPERATURE	2.1.0
91	OSD_TEMP_SENSOR_3_TEMPERATURE	2.1.0
92	OSD_TEMP_SENSOR_4_TEMPERATURE	2.1.0
93	OSD_TEMP_SENSOR_5_TEMPERATURE	2.1.0
94	OSD_TEMP_SENSOR_6_TEMPERATURE	2.1.0
95	OSD_TEMP_SENSOR_7_TEMPERATURE	2.1.0
96	OSD_ALTITUDE_MSL	2.1.0
97	OSD_PLUS_CODE	2.1.0
98	OSD_MAP_SCALE	2.2.0
99	OSD_MAP_REFERENCE	2.2.0
100	OSD_GFORCE	2.2.0
101	OSD_GFORCE_X	2.2.0
102	OSD_GFORCE_Y	2.2.0
103	OSD_GFORCE_Z	2.2.0
104	OSD_RC_SOURCE	2.2.0
105	OSD_VTX_POWER	2.2.0
106	OSD_ESC_RPM	2.3.0
107	OSD_ESC_TEMPERATURE	2.5.0
108	OSD_AZIMUTH	2.6.0
109	OSD_CRSF_RSSI_DBM	2.6.0
110	OSD_CRSF_LQ	2.6.0
111	OSD_CRSF_SNR_DB	2.6.0
112	OSD_CRSF_TX_POWER	2.6.0
113	OSD_GVAR_0	2.6.0
114	OSD_GVAR_1	2.6.0
115	OSD_GVAR_2	2.6.0
116	OSD_GVAR_3	2.6.0
117	OSD_TPA	2.6.0
118	OSD_NAV_FW_CONTROL_SMOOTHNESS	2.6.0
119	OSD_VERSION	3.0.0
120	OSD_RANGEFINDER	3.0.0
121	OSD_PLIMIT_REMAINING_BURST_TIME	3.0.0
122	OSD_PLIMIT_ACTIVE_CURRENT_LIMIT	3.0.0
123	OSD_PLIMIT_ACTIVE_POWER_LIMIT	3.0.0
124	OSD_GLIDESLOPE	3.0.1
125	OSD_GPS_MAX_SPEED	4.0.0
126	OSD_3D_MAX_SPEED	4.0.0
127	OSD_AIR_MAX_SPEED	4.0.0
128	OSD_ACTIVE_PROFILE	4.0.0
129	OSD_MISSION	4.0.0
130	OSD_SWITCH_INDICATOR_0	5.0.0
131	OSD_SWITCH_INDICATOR_1	5.0.0
132	OSD_SWITCH_INDICATOR_2	5.0.0
133	OSD_SWITCH_INDICATOR_3	5.0.0
134	OSD_TPA_TIME_CONSTANT	5.0.0
135	OSD_FW_LEVEL_TRIM	5.0.0
136	OSD_GLIDE_TIME_REMAINING	6.0.0
137	OSD_GLIDE_RANGE	6.0.0
138	OSD_CLIMB_EFFICIENCY	6.0.0
139	OSD_NAV_WP_MULTI_MISSION_INDEX	6.0.0
140	OSD_GROUND_COURSE	6.0.0
141	OSD_CROSS_TRACK_ERROR	6.0.0
142	OSD_PILOT_NAME	6.0.0
143	OSD_PAN_SERVO_CENTRED	6.0.0
144	OSD_MULTI_FUNCTION	7.0.0
145	OSD_ODOMETER	7.0.0	For this to work correctly, stats must be enabled (set stats=ON). Otherwise, this will show the total flight distance.
146	OSD_PILOT_LOGO	7.0.0
147	OSD_CUSTOM_ELEMENT_1	7.0.0
148	OSD_CUSTOM_ELEMENT_2	7.0.0
149	OSD_CUSTOM_ELEMENT_3	7.0.0
150	OSD_ADSB_WARNING	7.0.0
151	OSD_ADSB_INFO	7.0.0
152	OSD_BLACKBOX	8.0.0	The element will be hidden unless blackbox recording is attempted.
153	OSD_FORMATION_FLIGHT	8.0.0
154	OSD_CUSTOM_ELEMENT_4	8.0.0
155	OSD_CUSTOM_ELEMENT_5	8.0.0
156	OSD_CUSTOM_ELEMENT_6	8.0.0
157	OSD_CUSTOM_ELEMENT_7	8.0.0
158	OSD_CUSTOM_ELEMENT_8	8.0.0
159	OSD_LQ_DOWNLINK	8.0.0
160	OSD_RX_POWER_DOWNLINK	8.0.0
161	OSD_RX_BAND	8.0.0
162	OSD_RX_MODE	8.0.0
163	OSD_COURSE_TO_FENCE	8.0.0
164	OSD_H_DIST_TO_FENCE	8.0.0
165	OSD_V_DIST_TO_FENCE	8.0.0
166	OSD_NAV_FW_ALT_CONTROL_RESPONSE	8.0.0
167	OSD_NAV_MIN_GROUND_SPEED	9.0.0
168	OSD_THROTTLE_GAUGE	9.0.0

Pilot Logos

From INAV 7.0.0, pilots can add their own logos to the OSD. These can appear in 2 places: the power on/arming screens or as an element on the standard OSD. Please note that the power on/arming screen large pilot logos are only available on HD systems.

To use the pilot logos, you will need to make a custom font for your OSD system. Base fonts and information can be found in the OSD folder in the Configurator resources. Each system will need a specific method to create the font image files, so they will not be covered here. There are two pilot logos.

The small pilot logo appears on standard OSD layouts, when you add the elemement to the OSD screen. This is a 3 character wide symbol (characters 469-471).

The large pilot logo appears on the power on and arming screens, when you enable the feature in the CLI. To do this, set the osd_use_pilot_logo parameter to on. This is a 10 character wide, 4 character high symbol (characters 472-511).

Settings

• osd_arm_screen_display_time The amount of time the arming screen is displayed.
• osd_inav_to_pilot_logo_spacing The spacing between two logos. This can be set to 0, so the original INAV logo and Pilot Logo can be combined in to a larger logo. Any non-0 value will be adjusted to best align the logos. For example, the Avatar system has an odd number of columns. If you set the spacing to 8, the logos would look misaligned. So the even number will be changed to an odd number for better alignment.
• osd_use_pilot_logo Enable to use the large pilot logo.

Examples

This is an example of the arming screen with the pilot logo enabled. This is using the default settings.

This is an example of setting the osd_inav_to_pilot_logo_spacing to 0. This will allow a larger, single logo.

Post Flight Statistics

The post flight statistcs are set in the firmware. Statistics are only hidden if the supporting hardware is not present. Due to size contraints. The post flight statistics are spread over 2 pages on analogue systems.

Statistics shown

Statistic	Requirement	Page
Flight Time		1	The total time from arm to disarm.
Flight Distance		1
Maximum Distance From Home	GPS	1
Maximum Speed	GPS	1
Average Speed	GPS	1
Maximum Altitude	Baro/GPS	1
Minimum Average Cell Voltage		1
Minimum Pack Voltage		1
Maximum Current	Current Sensor	1
Maximum Power	Current Sensor	1
Energy Used (Flight)	Current Sensor	1
Energy Used (Battery Total)	Current Sensor	1	This data is not reset on arming.
Average Efficiency	Current Sensor & GPS	1
Minimum RSSI		2
Minimum LQ	CRSF	2
Minmum dBm	CRSF	2
Minimum Satellites	GPS	2
Maximum Satellites	GPS	2
Minimum ESC Temperature	ESC Telemetry	2
Maximum ESC Temperature	ESC Telemetry	2
Maximum G-Force		2
Minimum Z axis G-Force		2
Maximum Z axis G-Force		2
Blackbox file number	Blackbox recording	2
Disarm method		1 & 2
Settings save status		1 & 2	Shows a message if the settings are being saved or have been saved on disarm.

Configuration

There are a couple of settings that allow you to adjust parts of the post flights statistics.

• osd_stats_page_auto_swap_time allows you to specify how long each stats page is displayed [seconds]. Reverts to manual control when Roll stick used to change pages. Disabled when set to 0.
• osd_stats_energy_unit allows you to choose the unit used for the drawn energy in the OSD stats [MAH/WH] (milliAmpere hour/ Watt hour). Default is MAH.
• osd_stats_show_metric_efficiency if you use non-metric units on your OSD. Enabling this option will also show the efficiency in metric.