WFB-NG — Configuration
Encryption keys
WFB-NG encrypts traffic. Keys are generated with a single command (so they form a valid pair):
wfb_keygenIt creates two files. Place them like this:
drone.key→ on the camera (drone):/etc/drone.keygs.key→ on the ground station:/etc/gs.key
Keys must be from the same pair
If gs.key and drone.key were generated by different wfb_keygen runs, the link will not come up (decryption error). Generate both keys together, then distribute them to the devices.
Configuration: /etc/wifibroadcast.cfg
The main link config. Channel and region are set in [common]; the video/telemetry streams live in separate sections.
[common]
wifi_channel = 161 # 161 = 5825 MHz (5.8 GHz)
wifi_region = 'BO' # region for maximum transmit power
[drone_video]
peer = 'connect://127.0.0.1:5600' # where to push video
bandwidth = 20 # 20 or 40 MHz
stbc = 1
ldpc = 1
mcs_index = 1
fec_k = 8
fec_n = 12
[gs_video]
peer = 'listen://0.0.0.0:5600'
[gs_mavlink]
peer = 'connect://127.0.0.1:14550'Key parameters
| Parameter | Value | Description |
|---|---|---|
wifi_channel | e.g. 161 | Wi-Fi channel (must match on drone and GS) |
wifi_region | e.g. 'BO' | Region/power (choose one legal for your country) |
bandwidth | 20 / 40 | Channel width, MHz |
mcs_index | 0–7 | Modulation scheme: higher = more bitrate, less range |
stbc / ldpc | 0/1 | Coding for interference resilience |
fec_k / fec_n | e.g. 8 / 12 | FEC: k data out of n packets (more headroom = more robust) |
short_gi | True/False | Short guard interval |
Power and region
The wifi_region parameter affects the allowed transmit power. Use a value that is legal for your country and band. Excessive power may be illegal and can overheat the card.
Bitrate Calculator
Select your parameters — the calculator shows the real video bitrate after FEC overhead.
fec_k8fec_n12How to read the result
PHY is the raw Wi-Fi channel bitrate. Video bitrate is what actually reaches the screen after FEC overhead. For smooth HD video you need ≥ 15 Mbps, for comfortable flying — ≥ 20 Mbps. Default settings: MCS 1, 20 MHz, Long GI, FEC 8/12 give ~8.7 Mbps — enough for basic FPV.