HD Zero Goggle
HDZero Goggle User Manual
Specifications:
- Supports digital, analog, and HDMI video
- Runs on Linux OS
- 90Hz 1080p OLED screens with sliding IPD adjustment
- Dials for focus adjustment
- Integrated 2D deinterlacer
- Built-in ESP32 and H.265 DVR
- 6-axis smart inertial measurement for head tracking pan+tilt
support - Add-on side-mounted analog module bay
- Add-on 2.4Ghz WiFi video streaming module
Product Usage Instructions:
1. Operating Manual:
Before using the HDZero Goggle, it is essential to thoroughly
read through the operating manual provided.
2. Power On/Off:
To power on the goggle, press and hold the power button for a
few seconds. To power off, repeat the same step.
3. Adjustments:
Use the IPD adjustment slider to set the interpupillary distance
for a comfortable viewing experience. Use the focus adjustment
dials to achieve sharp focus.
4. Analog Input:
The goggle processes analog input through a video decoder,
deinterlacer, and upscaler. Ensure proper connections for optimal
video quality.
5. DVR and Playback:
Use the built-in H.265 DVR to record videos and playback using
the on-screen display (OSD) controls. Navigate through recorded
videos and settings easily.
6. WiFi Streaming:
To enable live streaming, attach the add-on 2.4Ghz WiFi video
streaming module and follow the setup instructions for seamless
streaming.
Frequently Asked Questions (FAQ):
Q: How do I clean the optical module of the goggle?
A: Use a soft, lint-free cloth to gently wipe the optical module
to keep dust out and maintain optical clarity.
Q: Can I use my own diopter lens inserts with the goggle?
A: Yes, the goggle supports diopter lens inserts for users
requiring prescription lenses for vision correction.
Q: How can I adjust the fan settings on the goggle?
A: The fans on the goggle are automatically managed based on
temperature sensors. There are no user-adjustable fan settings.
HDZero Goggle User Manual
Revision 1.0 1.1
Date Nov 24, 2022 Jan 6, 2023
1.2
Jan 13,2023
1.3
Mar 25,2023
1.4
April 3, 2023
1.5
April 29, 2023
1.6
June 16, 2023
1.7
Dec 12, 2023
1.8
May 7, 2024
1.9
Jun 27, 2024
2.0
July 15 2025
2.1
Aug 16 2025
Description Initial draft Added notes for 18650 battery cases and 6S power in Added firmware update note for MacOS Added notes for expansion module installation Added notes for DVR, WIFI and firmware update steps Added notes for RTC and no dial for tuning channel Added module bay power instructions Modified instruction for WIFI streaming and RTC by SX Added low band setting description Named the firmware package as yyyymmdd Moved the emergency firmware to the recovery folder Added ELRS backpack and Goggle 2 Added OLED display disclaimer
For more product information, please visit: www.hd-zero.com All Rights Reserved
Table of Contents
Introduction ……………………………………………….3 Diagram …………………………………………………. 3 Features …………………………………………………3 Specification …………………………………………… 4 Included Accessories………………………………..4
Setup …………………………………………………………5 Power Switch ………………………………………….5 Power Input/Consumption ……………………….5 XT60 Cable ……………………………………………..5 Face Plate/Padding Foam …………………………6 Optical Adjustment ………………………………….6 Head Strap………………………………………………6 HDMI input……………………………………………..6 HDMI Output…………………………………………..7 AV input …………………………………………………7 Expansion Module Bay……………………………..8 Expansion Module………………………………..8 HT Output……………………………………………….8 Audio Line In/Line Out ……………………………..8 Mounting Rails ………………………………………..8 FW Port ………………………………………………….9 Open Source……………………………………………9
HDZero Goggle Operation…………………………..10 Controls ……………………………………………….. 10 Video view and Menu view……………………..10 Video Source …………………………………………11 HDZero Digital Receiver ………………………….11 Analog Input………………………………………….11 Fan Management…………………………………..12 Image Settings……………………………………….13 OLED Control……………………………………..13
DVR …………………………………………………….. 14 Playback ………………………………………………. 15 OSD …………………………………………………….. 15 Tune Channel ……………………………………….. 15 ESP32/Backpack Module ……………………….. 15
Update ELRS backpack firmware …………. 15 Bind HDZero Goggle and ELRS TX ………… 16 Start/Stop DVR Using a Switch ……………. 16 Set Channel Number Using Radio………… 17 WiFi Module ………………………………………… 18 Basic Fields……………………………………….. 18 Advanced Fields ………………………………… 18 System Fields ……………………………………. 19 Real Time Clock…………………………………….. 20 HDZero Firmware Update………………………. 21 Flashing Firmware to a HDZero VTX …….. 21 Flashing Firmware to the Goggle…………. 22 Troubleshooting……………………………………. 25 OLED Display Disclaimer ………………………… 25 Warranty……………………………………………… 26
Introduction
The HDZero Goggle is an all-in-one FPV goggle for digital, analog and HDMI video. Please take the time to read through this operating manual thoroughly before using.
Diagram
Features
Power on/off sliding switch be confident that the goggle is on or off at a glance or by feel
Designed for open source, the new goggle runs Linux. All code for the user interface is new and open source
Support diopter lens inserts 90Hz 1080p OLED screens with sliding IPD adjustment and dials for focus adjustment By integrating the entire goggle display pipeline with HDZero’s fixed-latency video
transmission, these goggles achieve 3ms glass-to-glass sub-frame latency with no jitter or dropped frames Mounting rails for patch antennas or whatever else you might want to mount Recessed front SMA jacks so no need to remove antennas when packing the goggle away Three independently addressable fans work in combination to cool the internals and prevent fogging. They are soft mounted to prevent screen vibration and noise HDMI input and HDMI output Built-in microphone for DVR 3.5mm combination headphone / microphone jack for audio and external mic 3.5mm analog video/audio input for use with ground station inputs
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Integrated 2D deinterlacer that adds no delay for analog input Built-in ESP32 Built-in H.265 DVR 6-axis smart inertial measurement for head tracking pan+tilt support Add-on side-mounted analog module bay that accepts most of today’s analog modules Add-on 2.4Ghz WiFi video streaming module for live streaming
Added features for the Goggle 2 Fully enclosed optical module to keep dust out Significantly sharper edges for enhanced optical display clarity (<1.5% distortion) Greatly enhanced analog reception performance, ensuring improved handling of weak
signals Available in two shell colors–White and Red–to suit individual preferences Built-in analog receiver Built-in 2.4Ghz WiFi video streaming module for live streaming
Specification
HDZero Camera glass-to-goggle glass latency: <3ms Adjust IPD range: 57-70mm for Goggle 1, 58-72mm for Goggle 2 Adjustable focus range: +2 to -6 diopter for Goggle 1, +4 to -7 for Goggle 2 Full HD 1920x1080p 90fps OLED micro display FOV: 46deg Input voltage: 7V-25.2V (2S-6S) Power consumption: 14.5W (with HDZero RF on), or 8.4W (with AV In) Weight: 294g for Goggle 1, 305g for Goggle 2 Dimension: 185x81x66mm
Included Accessories
1x HDZero goggle 1x wide face plate 1x narrow face plate 1x foam padding 1x goggle strap 1x 1200mm XT60 cable 1x 150mm HDZero VTX programing cable 1x Lens cloth 1x Thick Canvas Goggle Bag for Goggle 1, or 1x Hardcase for Goggle 2
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Setup
The HDZero goggle has many features that can be customized to the individual pilot.
Power Switch
There is a sliding power switch on the right side of the goggles. You may use it to turn on/off the goggle, or just leave it on and plug/unplug the DC barrel plug to turn the goggle on and off.
In order to prevent voltage spikes entering the goggle, it is mandatory to plug in a 6S (max 4.2V /cell) battery only if the power switch is off.
Power Input/Consumption
The goggle supports 7-25.2V power input 1. Please make sure the power polarity is correct 2 (Center pin positive) before powering on the goggle.
Mode
TABLE 1. Power Consumption Power Consumption
1 HDZero Digital
1.2A@12V
2 Expansion module+ IRC RapidFire3 0.9A@12V
3 AV In
0.7A@12V
4 HDMI in
0.7A@12V
Notes: 1. DO NOT use a 6S or above HV lipo to power on the goggle, it will permanently damage the goggle. 2. 18650 battery cases can kill your goggle (blow the fuse). Always install batteries in correct polarity, check with case’s battery checker beforehand, if the checker lights don’t turn on, the batteries are installed backwards and the goggle’s fuse will blow to protect the goggle. This can be repaired by replacing the fuse inside the goggles, but at owner’s own cost. 3. RapidFire is a product of ImmersionRC limited. It is not included.
XT60 Cable
The goggle includes a 1200mm XT60 cable for connecting a battery in your pocket. You may also purchase a shorter 90mm cable on HDZero shop if you wish to locate your battery on the goggle head strap. The XT60 cable (either 1200mm or 90mm) has no voltage regulator. The cable passes voltage directly through the goggle.
Notes: 1. Do not connect an over 6S battery to the goggle, as the maximum voltage rating of the goggle is 6S (4.2V/cell).
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2. Some types of XT60 cable, i.e., HDZero VRX cable, has integrated DC regulators. Make sure that cable is able to output enough current as indicate at Table 1. The goggle won’t boot or keep rebooting if there if that happens.
Face Plate/Padding Foam
The goggle includes both a wide face plate and a narrow one. You may choose the appropriate one to fit your face, and use the included 7mm thick foam padding for both comfort and preventing light leakage.
Optical Adjustment
After goggle is powered on, you will see an image on the OLED displays. Complete the following steps to adjust the optics: 1. Focus adjustment: Close one eye and slowly twist the focus knob on that side of the goggle
until the image comes into focus. Once it works well with one eye, repeat the process with the other eye. 2. IPD adjustment: Close one eye and slide the knob to center the image. Once the image is centered, repeat the process with the other eye. 3. Fine adjustment: Open both eyes and look at the merged image. Make small adjustments to the focus and IPD for each eye until it feels visually comfortable and merges into a single clear picture.
Note: Do not expose the lens directly to sunlight. Otherwise, the OLED displays might be damaged.
Head Strap
The goggle includes a 50mm (2 inch) wide head strap with battery pocket. Once you have configured the face plate and padding foam for your preferred face fit, put on the head strap and adjust the tightness to your preference.
HDMI input
The HDZero goggle includes a single port HDMI 1.4b receiver through a mini HDMI port. The incoming HDMI video is routed to the OLED display without adding any frame buffer latency.
Please note that most HDMI connectivity issues are due to either incorrect monitor settings or a faulty HDMI cable. If you encounter issues using the HDMI input, try connecting with alternative HDMI sources and alternative cables to rule out these common causes.
The current firmware supports resolution up to 1080p60 and 720p100 for HDMI input.
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HDMI Output
The HDZero goggle includes a high-performance single channel HDMI transmitter that is fully compliant with HDMI 1.3a through a mini HDMI port. The HDMI output will display exactly the same content as what appears on the OLED displays.
TABLE 2. HDMI Output Format
Input Source
HDMI Output format
1 HDZero 60fps Camera
1280x720x60fps
2 HDZero 90fps Camera
1280x720x90fps
3 NTSC
1280x720x59.97fps
4 PAL
1280x720x50fps
5 HDMI in
Not supported
AV input
The HDZero goggle supports AV input through a 3.5mm AV jack. The pinout is shown in FIG 1. The AV input cable is not included. It is available on the HDZero shop and other online stores.
Audio Left Ground
Audio Right
HT PPM Output
MIC
Audio Left
Ground
Video
Audio Right Ground
FIG 1. AV input Jack
FIG 2. HT output Jack
FIG 3. Line In/Out Jack
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Expansion Module Bay
The HDZero goggle has an expansion module bay for installing expansion module that supports analog receiver and/or WIFI modules.
Notes:
1. HDZero goggle provides 5V power to analog receiver and in-takes its CVBS output. There are no control signals from the goggle to analog receiver. You need to tune analog receiver’s channel and menu setting by its own buttons and display.
2. There are two-row pins on the connector of expansion module, and a two-row socket on goggle. Make sure these 2-row pins are well seated into the 2-row socket. Analog receiver will not be able to power up if 2-row pins is one row down.
Expansion Module Expansion module V1 supports analog receiver only, and V2 supports both analog and WIFI. Expansion modules are sold separately. Some of expansion module may have a physical switch to power on or off the inserted analog receiver. The switch does not control the power of WIFI circuit of V2 modules.
Except some early version of Goggle 1, all HDZero Goggle 1 and 2, there is a soft switch available in the goggle menu to turn on the power to module bay. Please note that early expansion modules cannot be controlled by this soft switch.
Notes:
1. The soft switch must be turned on for the module bay to be powered and is off by default. 2. For Goggle 2: Although Expansion module V2 supports both analog and WIFI, its WIFI function is disable
when it is insert to a Goggle 2 that has built-in WIFI already.
HT Output
The HDZero goggle has a 6-axis smart inertial measurement unit for head tracking pan+tilt support. The HT output jack pinout is shown in FIG 2. The HT cable is not included. It is available on the HDZero shop and other online stores.
Audio Line In/Line Out
The HDZero goggle has a CTIA standard 3.5mm Line in/Line out jack for microphone and headphones. The pinout is shown in FIG 3.
Mounting Rails
The HDZero goggle has a unique mounting rail for patch antennas or whatever else you might want to mount.
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Here is mount adapter for TrueRC patch antennas by Ryan Quellet, and ball joint rail mount by userzero1.
FW Port
The FW port is used for flashing firmware to HDZero VTXes. A 150mm programming cable is included. The instruction for flashing VTX firmware is described on HDZero Firmware Update section.
Open Source
The HDZero Goggle is open source. You can find the SoC Firmware and Goggle CAD files at Github.
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HDZero Goggle Operation
This section describes the general operation of the HDZero goggle.
Controls
– Dial Pad – Enter Button – Func Button
Video view and Menu view
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Video Source
The HDZero goggle can display video from any of 4 sources:
– Built-in HDZero digital receiver – Built-in Analog receiver (appliable to Goggle 2 only) – AV in – Expansion Module in (such as with an analog video receiver) – HDMI in
HDZero Digital Receiver
The “Scan Now” option on the main menu will scan the following channels for an HDZero video signal:
– R1-R8, E1, F1, F2, and F4 channels, or – L1-L8 if low band is selected
“Scan Now” will perform the following: – Scan the above channels, – Lock on to the channel if there is only one valid channel with a signal, or – Let you choose between the channels if it has found two or more channels, or – Continue to scan after 5 seconds if no signal is detected, or – Wait for a long press of the Enter button to exit to the main menu
Notes:
1. To enable low band, (1)VTX side: Set to Lowband at VTX menu, (2) Goggle side: set Source -> HDZero Band to Lowband. Here are the center frequencies for L1-L8.
Low Band Channel
L1
L2
L3
L4
L5
L6
L7
L8
Frequency (MHz)
5362 5399 5436 5473 5510 5547 5584 5621
2. Only Nano 90 camera supports 540p60 mode. When it is set to 540p60, the goggle needs to set Source > HDZero BW to Narrow. All other modes need to set Source > HDZero BW to Wide.
Analog Input
The HDZero goggle takes analog video input from (1) the AV input jack or, (2) the external Expansion Module (not included, available on the HDZero Shop) or, (3) built-in analog receiver for Goggle 2. The goggle processes analog video from either of these inputs in the same way, but the Expansion Module provides an easy plug-and-play experience if you are using a standard FPV analog module. There is a soft switch available in the goggle menu to turn on the power to the module bay. This must be turned on for the module bay to be powered and is off by default.
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The HDZero goggle uses a novel approach to process the analog input, resulting in improved analog video quality:
– It uses a video decoder with an adaptive comb filter to separate Y/C from the composite video;
– It uses a deinterlacer to convert fields to frames, instead of doubling the interlaced lines;
– It uses an upscaler to record and display the video;
AV in
Expansion Module In
DEMUX
Video Decoder w/ adaptive Comb Filter
De-Interlacer
Up Scaler
DVR OLED
Analog Composite Video
720×2 40×60 Field per second
720×4 80×60 Frame per second
1280x720x60 Frame per second
FIG 4. Signal Processing Path for Analog Input of Goggle 1
AV in Jack Expansion Module in
Left Top Antenna
Analog RF Receiver
DEMUX
Video Decoder w/ adaptive Comb Filter
De-Interlacer
Up Scaler
DVR OLED
Analog Composite Video
720x240x60 Field per second
720x480x60 Frame per second
FIG 5. Signal Processing Path for Analog Input of Goggle 2
1280x720x60 Frame per second
Fan Management
There is one fan on the top of the goggle and one fan on each side of the goggle. All fans are soft mounted to reduce vibration and noise. There are three temperature sensors on top and sides of the goggle.
These fans are critical to goggle performance:
– The top fan provides cooling for the OLED displays and defogging for the optical lens; – The side fans provide cooling for the IO and RF boards inside the goggle
They will prevent goggle from being too hot, improving OLED life span and ensuring maximum HDZero RF performance.
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Top fan can be set to a 1-5, and side fans for 2-9 level, corresponding from minimum to max speed.
There are two control modes for side fans:
– Automatic mode: Goggle firmware will automatically speed up/down the fan on each side;
– Manual mode: You can manually set the speed for each fan; – Regardless of the current mode, the goggle firmware will enter into rescue mode under
these situations: o temperature sensor on top reports hot: top fan goes to max speed; o temperature sensor on left/right reports hot: left/right fan goes to max speed;
You can change the top fan speed by pressing and holding the Func Button. You can monitor the top fan speed changes on the goggle OSD to quickly change the amount of air blowing onto your face and the optic lenses while in the Video view.
Notes:
1. Only the side fans have automatic mode. The top fan is always in manual mode unless it is in rescue mode.
2. It is recommended to use automatic mode for side fans, and set top fan speed as desired level.
Image Settings
The HDZero goggle has an image processor to fine tune video before feeding to DVR and display. It includes:
– Brightness – Saturation – Contrast
OLED Control For OLED display, you may set OLED brightness to the desired level. Note that the OLED brightness setting applies to the OLED display only.
If the HDZero goggle detects no movement or no key input for programmed time (1/3/5/7 minutes), it will dim the OLED display as an alarm, and it will wait for another one minute before turning off both the display and HDZero digital receiver with a short beep. The OLED display and HDZero receiver will resume normal operation if the goggle detects movement or any key input. This feature can be disabled by setting the waiting time to “Never”.
OLED displays can provide more vivid colors than traditional LCD panels, However, if they are displaying the same content for an extended period of time, it may come across issues like “Image retention” or “Image burn-in”. It is highly recommended to use the above OLED auto off feature or “Go Sleep” from main menu to turn off OLED while not using the goggle.
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DVR
The HDZero goggles integrates a DVR for both the HDZero digital receiver and analog input. These are the DVR options:
– Automatic Record: DVR will start to record when it detects there is valid HDZero RF on the current channel, and stops recording when the signal is no longer detected.
– Manual Record: DVR will start/stop only if Func button is clicked. – MP4 format or TS format: MP4 format is better supported by many video editing applications.
However, MP4 files can be corrupted if the goggle loses power before the file is closed after recording, which can happen if the goggle runs out of battery or the power cord is unplugged unexpectedly. Unlike the MP4 format, the TS format saves the stream instantly to DVR without any risk of corrupted files, even if the goggle suddenly loses power. TS format is preferred. – H264/H265. The DVR must use the H264 format when recording 90fps video (it records in 1280x720x90 for better quality). It uses the H265 format in all other cases. – Audio: You can choose to record audio or not. There are 3 audio sources that can be recorded:
o Built-in microphone o Line in (From Line in/out port, usually from an external MIC) o AV in (From AV in Jack or built-in analog receiver audio output)
The file system on SD card can be corrupted by suddenly power off while goggle is writing data to it. HDZero Goggle operates on a Linux-based system, and it is unable to store final emergency data when powered off abruptly. This can result in corrupted SD card file systems and video files that won’t play. Here are tips on how to avoid powering off while recording is ongoing:
– Auto record mode: after quad is landed, do one of the following – Long press “Enter” button to switch to menu mode, then power off the goggle, or – Power off quad first, and wait for 10 seconds, then power off the goggle
– Manual record mode: Click “Func” button to stop DVR before power off the goggle – Select “Scan and Fix” if Windows or Mac reports problem when SD card is inserted.
Note: It is convenient to start/stop DVR with ELRS backpack function. See ESP32/Backpack Module.
Input Source
TABLE 3: DVR resolution Recording resolution
Encoder
1 HDZero 60fps Camera 1280x720x60fps
H.265
2 HDZero 90fps Camera 1280x720x90fps
H.264
3 NTSC
1280x720x59.97fps
H.265
4 PAL
1280x720x50fps
H.265
5 HDMI in
The same as input H.264
resolution and frame rate
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Playback
The HDZero goggle can play back DVR recordings.
– The player lists the recent recording first. Use Dial up/down to select a file, and click to play it – On controller bar, use Dial Up/Down to seek video (5 seconds forward/backward), and click to
play/pause – Long press the Enter button to exit the controller bar, and long press Enter again to exit the
player.
Notes:
1. The player will ignore files that are less than 5MB. 2. The playback feature is designed for quick review–whether checking a recording or locating the final
moments of a lost drone. Please note that it does not play back at full frame rate.
OSD
The goggle supports OSD from flight controller (FC OSD) and OSD of its own status (Goggle OSD). You may select if both OSD should be recorded with video stream at Record Options sub-menu.
Goggle OSD can be shown/ hidden by clicking the Enter button under Video view. The positions of Goggle OSD items are fixed on current firmware.
The goggle has built-in OSD fonts for BetaFlight, Arduino and iNav. It will automatically load the corresponding font according to type of flight controller that is connected with HDZero video transmitter. You can also customize FC OSD by putting bitmap files under SD card root directory/resource/OSD/FC.
Tune Channel
By Dialing up/down, video channel number can be tuned on video mode for HDZero receiver, or built-in analog receiver on Goggle 2. However, this can be disabled by putting a file named as “no_dial.txt” on SD card root directory when booting up.
The video channel number can also be tuned by ELRS backpack as described below.
ESP32/Backpack Module
The HDZero Goggle supports a built-in ESP32 Backpack that achieves:
o Tune channel number of built-in HDZero o Tune channel number of built-in Analog receiver for Goggle 2 o Wireless head tracking o Start/Stop DVR using a radio switch
Update ELRS backpack firmware – Install ExpressLRS Configurator from Releases · ExpressLRS/ExpressLRS-Configurator – Open ExpressLRS Configurator to build firmware for goggle:
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1 Switch to Backpack menu 2 Select the same release version with the radio backpack 3 Select target HDZero Goggles -> Built-in ESP32 Backpack 4 Set the same binding phrase as the radio backpack, otherwise your backpack needs to
be bonded manually 5 Click “BUILD”. A folder will pop up automatically containing the following 4 files when
completed. Copy them to “ELRS” directory under SD card root i. boot_app0.bin ii. bootloader.bin iii. firmware.bin iv. partitions.bin
– Insert SD card to HDZero Goggle – Goggle main Menu: Firmware -> Update ESP32 to flash Backpack firmware for the Goggle
Bind HDZero Goggle and ELRS TX Please flash your ELRS Transmitter backpack firmware of Radio to the same version as HDZero Goggle Backpack firmware. Refer to Tx Backpack Setup – ExpressLRS. If the binding phrase of goggle is different with Radio, it is needed to bind manually for first use.
1. Goggle: ELRS -> Backpack = on 2. Goggle: ELRS -> Bind 3. Radio: ExpressLRS Lua -> Bind After a few seconds, the goggle will display success if the binding is complete. Start/Stop DVR Using a Switch The HDZero goggle supports start/stop recording using a switch on radio. Here are steps to setup on Goggle and Radio: 1. Goggle: Record Option -> Record Mode = Manual
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2. Radio ExpressLRS Lua -> Backpack -> DVR Rec = AUXn | AUXn, where n is aux channel number of the switch which is specified to start/stop Goggle DVR.
Set Channel Number Using Radio The HDZero goggle supports set channel number using ExpressLRS Lua on radio. Here are steps to setup on Radio:
1. Enter Radio ExpressLRS Lua -> VTX Admin 2. Set Band and Channel you want to 3. Send VTx
Note: Channel number of both HDZero receiver and built-in Analog Receiver can be set by the method.
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WiFi Module
The HDZero Goggle 1 expansion module V2 and Goggle 2 supports WIFI video streaming to smart phone, desktop or laptop. Multiple devices can wirelessly connect to the goggle and receive the video simultaneously. Control over the behavior of the WiFi module is completely managed from within the WiFi Module page. Users have the ability to configure the goggle as a Host (Access Point) or a Client (Join Network). WiFi Module page supports both “Basic” and “Advanced” configuration fields. Basic Fields
· Enable Powers On or Off the WiFi Module hardware. · Mode Host (Access Point) or Client (Join Network). · SSID User can specify a Host and Client network names individually based on Mode. · Password User can specify a Host and Client network password individually based on Mode.
Note that password requires a minimum of 8 characters. · Apply Settings Stores and configures the WiFi Module hardware with the settings the user has
modified.
Advanced Fields · DHCP This setting only applies to Client Mode. Note the Address specified will be requested for use by the WiFi. Ultimately it is up to the router to find and available address if the address requested is not in use, then the one specified will be used. · Address The network ip address. This setting applies for both Host and Client modes. · Netmask The network subnet mask. This setting applies for both Host and Client modes. · Gateway The network gateway ip address. This setting applies for both Host and Client modes. · DNS the Domain Network Service ip address.
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· RF Channel This setting only applies to Host Mode and a user can specify which radio frequency channel they want to communicate on.
System Fields · Root PW Update the root password for the goggles. This applies to SSH and SCP communications. · SSH Enable/Disable Access to the goggles. Defaults to disabled as a security precaution.
Finally, if either page is modified “Basic” or “Advanced”, the user must return back to the “Basic” page and select “Apply Settings” in order to configure the WiFi Module. In order to establish a wireless video stream with the HDZero Goggles via a smartphone or computer, the user must follow these steps:
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1. The “Basic” page within the WiFi Module page will contain the necessary information in order to establish communications with the HDZero Goggles: a. Host Mode Refer to the SSID and Password fields in order to join the HDZero Goggle wireless network. b. Client Mode Refer to your wireless access point user manual.
2. Install VLC app (or other similar app that supports RTSP) on your device. 3. Open the above app, choose “Open Network Stream”, and type the RTSP URL provided by the
“Basic” page footnote as it will provided the necessary URL in order to establish a video stream via VLC app, below is the default ip address if the user has not made modifications within the “Advanced” page:
rtsp://192.168.2.122:8554/hdzero
Video latency is expected due to networking protocols, buffering schema of the app, and OS platforms.
Real Time Clock
The HDZero Goggle includes a Real Time Clock (RTC). Goggle 1 is shipped without a pre-installed battery, whereas Goggle 2 comes equipped with one. If the battery is missing or depleted, the device will lose its stored date and time information. However, the RTC can still be configured via the Clock Page which will set the system clock and hardware clock upon invoking “Set Clock”. For users who have installed an aftermarket battery this only needs to be done once. Otherwise, when the goggle boots up it will revert to the last date and time the user had specified since applying “Set Clock” command.
An aftermarket battery could be CR2032 laptop battery with MX1.25-2P male connector. An example can be found here.
Note: It is user’s full responsibility for any damage due to opening the goggle to install the battery.
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HDZero Firmware Update
Download the latest Goggle firmware from HDZero download.
TABLE 4. Goggle Firmware File
Downloaded Firmware (.Zip file)
Zip File Content
HDZERO_GOGGLE_nnn.bin
HDZero Goggle 1
HDZEROGOGGLE_Revyyyymmdd.zip
Recovery/HDZG_OS.bin Recovery/HDZG_BOOT.bin Recovery/HDZGOGGLE_RX.bin Recovery/HDZGOGGLE_VA.bin
HDZERO_GOGGLE2_nnn.bin
HDZero Goggle 2 HDZEROGOGGLE2_Revyyyymmdd.zip Recovery/HDZG_OS.bin Recovery/HDZGOGGLE_RX.bin Recovery/HDZGOGGLE_VA.bin
Purpose To flash firmware from Goggle main menu
For emergency recovery
To flash firmware from Goggle main menu
For emergency recovery
Flashing Firmware to a HDZero VTX The HDZero goggle can flash firmware to a HDZero video transmitter via its FW port. Here are the steps:
To flash a single VTX:
1. Copy HDZERO_TX.bin to root directory of a SD card that is formatted as FAT32 2. Power on the goggle 3. Connect the VTX and HDZero goggle with the included programming cable 4. Go to Main menu | Firmware |Update VTX, the display will show the status of the flashing
process 5. Disconnect the VTX 6. This VTX is now flashed with the latest firmware
To flash multiple VTXes of the same type:
1. Copy HDZERO_TX.bin to root directory of a SD card that is formatted as FAT32 2. Power on the goggle 3. Connect one VTX to the HDZero goggle with the included programming cable 4. Go to Main menu | Firmware | Update VTX, the display will show the status, 5. Disconnect the VTX, this VTX is flashed 6. Repeat 3-5 for the other VTXes
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Note:
Flashing VTX firmware with Goggle is highly not recommended for Goggle safety consideration. HDZero Programming Cable is preferred for its convenience and safety. However, a Windows system is needed to run the HDZero Programmer app, Mac is not supported for now.
Flashing Firmware to the Goggle The HDZero Goggle runs on Linux. Its firmware contains the customized Linux distribution and its application software. We only need to update the application instead of updating the whole OS and application in most cases. However, there are some rare cases where the OS could become corrupted, such as losing power during update process. It is also possible that changes may have to be made to the OS in the future to add new functionality.
Before you start to update firmware, go to Main menu|Firmware|Current version. It should be in the following format:
– n.xx.yyy, or – app:n-xx rx yy va zzz
If n is greater or equal than 9, take Normal Goggle Firmware Update Process, otherwise take A Special One Time Goggle Firmware Update Process.
Normal Goggle Firmware Update Process (for n 9) 1. Disconnect all cables from the goggle. Keep the power cable only; 2. Prepare the firmware file: o For Goggle 1: HDZERO_GOGGLE_nnn.bin o For Goggle 2: HDZERO_GOGGLE2_nnn.bin Copy it to root directory of SD card that is formatted as FAT32, and make sure there is no previous firmware in the root directory; 3. Power on the goggle; 4. Go to Main menu | Firmware | Update Goggle, the display will show the current version; 5. Wait for the completion (about 3 minutes), then power off; 6. Done!
A Special One Time Goggle Firmware Update Process (for n < 9) 1. Disconnect all cables from the goggle. Keep the power cable only; 2. Extract HDZERO_GOGGLE- nnn.bin/HDZG_BOOT.bin/HDZG_OS.bin, and copy them to root directory of a FAT32 formatted SD card; 3. Insert SD card, Select Main menu | Firmware | Update Goggle. Power off after completion; 4. Power on goggle, wait for 2 min then power off; 5. Power on goggle, wait for 5 mins then power off; 6. Done!
Note: (1)HDZG_BOOT.bin/HDZG_OS.bin will be removed from SD card if update successfully. (2) Have to wait for the above specified time, DO NOT move to next step in a hurry.
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The goggle can be bricked under some rare cases. If the goggle is on the firmware version n is 9 or later before bricked, follow Goggle Emergency Firmware Update Process; if n is earlier than version 9 or you are not sure which version it was on, please follow Goggle Emergency Firmware Update Process using Phoeix App.
Goggle Emergency Firmware Update Process (for n 9) 1. Disconnect all cables from the goggle. Keep the power cable only; 2. Extract HDZG_OS.bin/ HDZGOGGLE_RX.BIN/ HDZGOGGLE_VA.BIN, and copy them to root directory of a FAT32 formatted SD card, and insert SD card to the goggle; 3. Power on goggle, wait for 5 min then power off; 4. Done!
Note: (1)HDZG_OS.bin/ HDZGOGGLE_RX.BIN/HDZGOGGLE_VA.BIN will be removed from SD card if update successfully. (2) Have to wait for the above specified time, DO NOT move to next step in a hurry.
Goggle Emergency Firmware Update Process using Phoenix App (for all versions) Download PhoenixCard.zip from the HDZero Download site, and extract it to a location on a Windows machine, for example, C:PhoenixCard. This is a one-time process. There is no Mac or Linux version for now. Download the latest firmware package from the HDZero Download site, and extract all files in the zip file to your local drive, i.e. C:Temp.
1. Launch C:PhoenixCardPhoenixCard.exe; 2. Follow the steps on FIG.5 to make a bootable SD card;
FIG 5. Make a bootable SD Card 3. Eject the SD card from Windows, and insert the SD card into the SD card slot of the goggle; Unplug all of the cables, i.e., HDMI in/out, Line in/out, AV in. Keep the power cable only. Power on the goggle, you will hear a long beep immediately. Wait for 3 minutes and you will hear another long beep; 4. Power off the goggle, and pull out the SD card from the goggle. (Do not power on goggle now);
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5. Follow the FIG.6 to restore the SD Card from BOOT mode, and format it as FAT32 on Windows;
FIG 6. Restore a SD Card 6. Copy HDZGOGGLE_RX.bin and HDZGOGGLE_VA.bin to the SD card root
directory; 7. Insert SD card into goggle, power on the goggle, wait for 2 minutes, and
there will be a long beep; 8. (Optional) Pull out the SD card, and check SD card contents on the PC.
The 2 files should be removed if flash process is successful; 9. Power the goggle off and then on again.
Notes: (1) A bootable SD card has a hidden partition that Windows Explorer will not show. And it can’t be removed even SD card is formatted with Windows Explorer. It means the goggle will flash itself from the bootable SD card unexpectedly and mess up goggle firmware if a bootable SD card is inserted when the goggle is powered on. (2) The above Step (5) must be followed strictly to get rid of the hidden bootable partition. Otherwise, it will brick the goggle when goggle is powered with this SD card inserted. If this happens, you will need to repeat the emergency firmware update process described in this section. (3) Have to wait for the above specified time, DO NOT move to next step in a hurry. (4) When the goggle is bricked, it shows HDZero Boot screen and will not get into Main menu.
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Troubleshooting
Support should be attempted in the following manner. 1. Read this manual first 2. Follow us on Facebook/Discord if possible a. Facebook: https://www.facebook.com/groups/hdzero b. Discord Server: https://discord.gg/VSkXzkKPHt 3. Email Technical Support: support@divimath.com
OLED Display Disclaimer
(1) Due to the nature of OLED technology, the presence of dead pixels is not uncommon and may occur during manufacturing. Please note the following guidelines: · Single dead pixel: This is considered normal and does not affect product performance. · Two consecutive dead pixels (in any direction–horizontal, vertical, or diagonal): Acceptable if the total number does not exceed four instances. · Three or more consecutive dead pixels (in any direction): This is considered abnormal and may qualify for warranty evaluation or replacement.
(2) OLED displays can provide more vivid colors than traditional LCD panels, However, if they are displaying the same content for an extended period of time, it may come across issues like “Image retention” or “Image burn-in”.
We appreciate your understanding and strive to maintain the highest quality standards.
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Warranty
The HDZero Goggle can be exchanged for a new unit within 7 days for any manufacturing defects if returned in new condition. The optic module will be warrantied for repair for 6 months, and all other components, for 2 years, if there are no signs of excessive use. Buyer will be responsible for shipping costs. If beyond the warranty period, we will provide repair services for a cost. For assistance with warranty issues, please contact support@divimath.com.
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Documents / Resources
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DIVIMATH HD Zero Goggle [pdf] User Manual HD Zero Goggle, Zero Goggle, Goggle |