FLEXIT Wifi does not respond to pyEcovent commands

[mansson]

Hello. I'm trying to contact my fan, that was sold as "FLEXIT wifi". The salesrep sent me the datasheet titled "Roomie Wifi - Smarthouse commands" which describes the protocol used here but he didn't know if it was valid.
I tried both using the library and with commands such as: "$ /usr/bin/echo -e 'mobile\x01\x00\x0D' | nc -u 192.168.2.168 4000"
I can't get my fan to respond to anything else than ping. It appears to have port 4000 open:

Nmap scan report for uppeduschflexit (192.168.2.168)
Host is up (0.021s latency).
Not shown: 65533 closed udp ports (port-unreach)
PORT     STATE         SERVICE
4000/udp open|filtered icq
4096/udp open|filtered bre
MAC Address: 10:52:1C:45:80:A4 (Espressif)

but Wireshark shows no response on any command listed in this datasheet.
Just mentioning this here in the vain hope that someone else has an interest in FLEXIT wifi and/or has any additional information.