Stand-alone/self-hosted configuration

[krass]

This was a quote from Mathias Pernot (Devialet's senior engineer) in relation to the D-Premier:

"It is true that sending the security pass for one's WiFi network over the Internet is not the most advisable practice even though realistically speaking, most security schemes today have been found to be easily hackable quite fast. To work around this issue yet maintain the ability to provide the D-Premier with a key so it can join the network, we've implemented another entry method similar to the one you mentioned. If you edit the configuration text file to change any parameter, the altered file will most likely be rejected by the D-Premier thanks to a CRC (check sum) key located on top of it which gets properly computed by the configurator and accordingly checked by the D-Premier.

I had added this validation mechanism to prevent uninformed users from breaking their hardware with inconsistent parameter values like those related to the power supply even if we have additional security checks. I think it really makes sense for that reason."

hi Ian, it was my understanding that the Wifi block of the config file was not used in the CRC calculation, for user privacy to allow users to hand-edit at home just the SSID and Wifi password.

At the time this was all introduced, it was somebody on Computer Audiophile who complained to Devialet after they initially put these items into the Configurator. Very shortly afterwards they allowed these to be excluded and updated the firmware.

I've not kept up with this so its possible that the approach is now different, but AFAIK it should still be possible to setup a config file with no Wifi details, and then edit them by hand later without invalidating the CRC..... ?