Notes | OpenHD | DJI O3 | HDZero | Walksnail | LTE (through internet) | |
|---|---|---|---|---|---|---|
URL to product | Whoop Lite (W): https://www.hd-zero.com/product-page/hdzero-whoop-lite-vtx Race V3 (R): https://www.hd-zero.com/product-page/hdzero-race-v3-vtx | https://caddxfpv.com/products/walksnail-avatar-vrx?variant=43697052418350 |
Already own all necessary hardware | |||
Description | Is a software that uses wifi adapters to transmit data. Can be used on Raspberry Pi | Full commercial product designed for use with their own product lines (FPV goggles) Known to produce lots of heat | HDZero is a brand, has many products available | Product comes in various combination of bundles | Using LTE to connect to the internet on the drone, then communicate via the internet | |
Range | Higher is better | Depends on wifi adapter: ~3km for low power adapters, 75km record with 30dbi antenna | 10km | 7km (4-5 km is pretty clear, 7km gets a lot of static) | 4km | Depends on strength of mobile signal |
Size (WxLxH) [air] | Lower is better | Depends on wifi adapter | VTX: 32.5×30.5×14.5 mm antenna: 85 mm 25.5 x 25.5mm M1.6 mounting | W: 32.4 x 32.5 x 4 mm (29x29mm inner) (25.5 x 25.5mm M2 mounting) R: 32mm x 28mm x 5mm (20mm x 20mm M4 mounting) | 33 x 33 x 9.5 mm 25.5 x 25.5 mm mounting |
*TBD: will be measured later |
Mass [air] | Lower is better | Depends on wifi adapter | 28g (transmitter) + 3g (antenna) = 31g | W: 4.5g (without shield) R: 5.5g (without shield) | 16g |
*TBD: will be measured later |
Latency | Lower is better | On a Raspberry Pi, >100ms “glass to glass” | 30ms @1080p/100fps 40ms @1080p/60fps | W: unknown R: 14ms @540p/90fps | 22ms average | Depends on server ZeroTier Miami server (their closest one) from Waterloo campus: ~80ms |
Transmitter (VTX) [air] | 8812AU or 8812BU WiFi Card | Cannot purchase separately | W and R | https://caddxfpv.com/collections/walksnail-avatar-system/products/walksnail-avatar-hd-vtx-only $100 on its own | Depends | |
Receiver (VRX) [ground] | 8812AU or 8812BU WiFi Card | DJI goggles 2, FPV goggles V2 Others are unknown | https://www.hd-zero.com/product-page/hdzero-vrx Note: need to buy SMA antennas Others are unknown | $220 on its own Has a MicroSD card slot for DVR (supports up to 256GB micro SD cards) | Laptop is fine | |
Camera support | https://openhd.gitbook.io/open-hd/hardware/cameras Should support a lot of them | Comes with a camera Other camera support unknown | Does come with a camera if choose to buy a bundle (like $30 more) Other camera support unknown | Does come with a camera if choose to buy a bundle Other camera support unknown | Any should be fine | |
Operating frequency | all 2.4 and 5.8 GHz bands | 2.400-2.4835 GHz (RX only) | W: 5.8 GHz R: 5.8 GHz | 5.725-5.850 GHz | LTE (up to 100Mbps) | |
Output |
|
H.265 Video format @ 50Mbps | W: 720p@60 fps R: 540p@90fps, 720p@60fps, and 1080p@30fps The VRX outputs HDMI video up to 720p@60fps | 1080p@60fps, 720p@120fps, 720p@60fps Transmitter uses H.265 Video format VRX outputs HDMI video as well | Depends on the data transfer speed limit. (But if 50Mbps can work for 4k@120fps on the DJI, 100Mbps should be enough, although additional work on encoding/compressing may need to be done) | |
On-board video capture | No | Yes
| No | Yes
| No | |
Cost (USD) | Lower is better | Depends on wifi adapters. Need one for air and one for ground. Claimed to be <$100 | $230 (No VRX/goggles) | W: $55 H: $70 VRX: $220 + antenna cost Total: $275 - $290 without antenna | VRX: $220 $240-310 with everything included |
$0, no cost, already own all hardware |
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