Curiouser and curiouser.
I changed my mind and found more practical to use an old Dell laptop for the remote keyboard, and to send characters via UDP to the application where they are processed as SDL2 events. An UDP custom protocol means there is no connection to manage between peers (needed with usbip), etc. Plus, I think I could display the pictures on the screen of the laptop, making it easier for the speaker to control the stream, but that's another subject. Doing so, I could revert to WPA authentication with a standard setup.
Since this gear will be on the road, I bought a metal case for the Raspberry Pi 5, and a TP-Link AC1300 wifi dongle with an antenna because this Faraday cage would severely limit the range of the internal antenna. Guess what? The laptop couldn't connect anymore when I chose the dongle as the hotspot interface, with the same message. My phone could connect. I fiddled with firmwares on the Pi 5 and the laptop, to no avail.
There's more. I tried the dongle on my desktop PC running Debian, quickly setting up an AP, and the laptop could connect.
So, to recap, here are the results of my tests. + = success, X = fail.
See the last 4 lines? Totally incoherent considering only the chipsets and the OSes. There's something beneath the surface that's wreaking havoc with authentication, and it involves well-hidden low level shenanigans. Currently exploring the D-Bus rabbit hole with busctl.
I changed my mind and found more practical to use an old Dell laptop for the remote keyboard, and to send characters via UDP to the application where they are processed as SDL2 events. An UDP custom protocol means there is no connection to manage between peers (needed with usbip), etc. Plus, I think I could display the pictures on the screen of the laptop, making it easier for the speaker to control the stream, but that's another subject. Doing so, I could revert to WPA authentication with a standard setup.
Since this gear will be on the road, I bought a metal case for the Raspberry Pi 5, and a TP-Link AC1300 wifi dongle with an antenna because this Faraday cage would severely limit the range of the internal antenna. Guess what? The laptop couldn't connect anymore when I chose the dongle as the hotspot interface, with the same message. My phone could connect. I fiddled with firmwares on the Pi 5 and the laptop, to no avail.
There's more. I tried the dongle on my desktop PC running Debian, quickly setting up an AP, and the laptop could connect.
So, to recap, here are the results of my tests. + = success, X = fail.
Code:
Pi Zero → Pi 5 internal XPhone → Pi 5 internal +Pi Zero → Home router +Laptop → Home router +Laptop → Pi 5 internal +Laptop → Pi 5 dongle XPhone → Pi 5 dongle +Laptop → Desktop dongle +Statistics: Posted by jzu — Wed Nov 27, 2024 9:49 am