Hello everyone!

We have a setup with four Raspberry Pi, all in IBSS mode and connected via B.A.T.M.A.N.. That all works fine. However we now have troubles scanning on the Pis for the neighbours. When we run sudo iw wlan0 scan ssid batman-test

We have the output: BSS 7e:40:ea:05:57:e9(on wlan0) -- joined last seen: 2433.130s [boottime] TSF: 0 usec (0d, 00:00:00) freq: 2412 beacon interval: 100 TUs capability: IBSS (0x0002) signal: -17.00 dBm last seen: 0 ms ago SSID: batman-test Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0 DS Parameter set: channel 1 IBSS ATIM window: 0 TUs ERP: Use_Protection HT capabilities: Capabilities: 0x21 RX LDPC HT20 Static SM Power Save RX HT20 SGI No RX STBC Max AMSDU length: 3839 bytes No DSSS/CCK HT40 Maximum RX AMPDU length 65535 bytes (exponent: 0x003) Minimum RX AMPDU time spacing: 4 usec (0x05) HT RX MCS rate indexes supported: 0-7 HT TX MCS rate indexes are undefined HT operation: * primary channel: 1 * secondary channel offset: no secondary * STA channel width: 20 MHz * RIFS: 0 * HT protection: non-HT mixed * non-GF present: 1 * OBSS non-GF present: 1 * dual beacon: 0 * dual CTS protection: 0 * STBC beacon: 0 * L-SIG TXOP Prot: 0 * PCO active: 0 * PCO phase: 0 Overlapping BSS scan params: * passive dwell: 20 TUs * active dwell: 10 TUs * channel width trigger scan interval: 300 s * scan passive total per channel: 200 TUs * scan active total per channel: 20 TUs * BSS width channel transition delay factor: 5 * OBSS Scan Activity Threshold: 0.25 % Extended capabilities: * HT Information Exchange Supported * BSS Transition * Operating Mode Notification WMM: information: 01 00

Which is not what we expected. We hope to see the RSSI of our neighbours and that should be possible, at least as I understand it. We have already tried iwspy (device doesn’t support it), leaving the ibss group (doesn’t help), iwlist (same problem) and the Mac address you see in the output doesn’t match any of the Pis we use.

We are stuck here, please help us. Maybe it would be possible to extract that info from batman directly?

The devices in questions are all Raspberry Pi 4 Model B, one with 1 GB RAM, two with 2 GB RAM and 1 with 4 GB RAM. We run: batctl debian-2023.0-1 [batman-adv: 2023.3]

This is the version of our wifi chip driver (sudo lshw -C network): *-interface:0 description: Wireless interface product: 43430 vendor: Broadcom physical id: 1 bus info: mmc@1:0001:1 logical name: mmc1:0001:1 logical name: wlan0 serial: d8:3a:dd:30:1d:4a capabilities: ethernet physical wireless configuration: broadcast=yes driver=brcmfmac driverversion=7.45.234 firmware=01-996384e2 multicast=yes wireless=IEEE 802.11

Thank you for your time Hannes Furmans

ETH Zürich