Réponse de ce matin de chez TBS (qui ne m'arrange pas vu le nombre de jouet à mettre à jour ☹️)
Hi Chaplain,
that firmware is very far back, which is why youre having issues,
new receivers require that newer firmware to bind.
there is a resolution,
youre going to need to step up the firmware on your receivers over major versions by binding and updating them to an updated transmitter.
youll want to update the transmitter to 3.xx
bind and update,
then 4.xx bind and update.
then from there youll be able to update to the 6.19 and later firmware.
the reason for this issue, is each major release of crossfire added a ton of code and bug fixes, each major release builds off the previous version
Best regards,