Jura wifi dongle connection reverse engineering using esp8266

[docdude]

I’ve downloaded the boot loader and flash images from jura found the bits in the decompiled Joe app. They are encrypted … arrrgg. If you have any decrypted flash dumps I would like to look through them.. I’ve managed to setup a esp8266 sketch that communicates with Joe app and have mostly worked through the onboarding of a wifi jura dongle.

I can send a UDP packet response to the Joe app udp scan command 0010a5f3. Look in wififrog source. The parsing of the response Joe is looking for is in that code. I just reversed engineered and placed the correct bytes in the packet sent back to Joe. I just picked a machine articlenum and machine num from Joemachines.txt for this example.

Using the manual dongle setup in Joe app I can enter the machine name, pin and password and connect to my fake esp8266 dongle by setting ssid to Jura_ . I still haven’t figured how to reconnect after setup/initialization.