Akeron duo salt for pool in bluetooth

Hi all,
I have a salt electrolyser for my pool : https://www.akeron.fr/en-gb/nos-produits/salt/duo-salt-regul-ph
I can connect the device with the Regul’app provided : ‎Regul'App dans l’App Store
The connexion is done through bluetooth and provide temp, ph, salt, etc…

Of course, I would like to retrieve theses data in HA !!!
But I really don’t know how to proceed to do some reverse engineering or something else…
Maybe someone already connect something similar ?

Thanks for your support

Just for history of this thread because @fransiouz already use hackeron gateway.

Thanks @sylvaing
It works like a charm !!
ESP32 inside with 3D printed case and external antenna

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