mimic edgetx/elrs bind start

[olliw42]

@jlpoltrack
this might be something to test out
it makes mLRS tell EdgeTx it is ELRS, such that EdgeTx should show the bind button in the crsf setup page. Pressing the bind button should put the tx module into bind mode indeed

this is not for merge but to test if this is working, so we eventually could consider doing a change to EdgeTx to get a bind button also for mLRS. (mLRS does not have an unbind mechanism, so this would work differently)

[jlpoltrack]

it makes mLRS tell EdgeTx it is ELRS, such that EdgeTx should show the bind button in the crsf setup page.

Flashed BetaFPV Micro with this branch, don't see Bind button on the Model Setup > External RF Page with EdgeTx 2.11

[jlpoltrack]

Would need to fake the version number as well - I see the check here is for version >= 3.4 https://github.com/EdgeTX/edgetx/blob/978532429289c5675bb396d68fae90d2faab6bfc/radio/src/gui/gui_common.cpp#L1262-L1265 to get the bind button to show up

Edit - so if I fake the VERSION to 99999 then the Bind and Arm Using options show up. Selecting Bind does put the Tx module in binding mode, so that part works.

[olliw42]

great. THX.
the button should change to 'unbind' when pressed ... when you press it again the tx module should stop the bind mode ... does this work too?

[jlpoltrack]

When I select the button to bind, the message on the button remains bind. If I select the button again, then the module does a soft reboot.

[olliw42]

yes, that's the behavior
so, I guess we can add the basic functionality, to be prepared for some addition to edgetx
THX!