Lemon-RX DSMP transmitter module support

[raphaelcoeffic]

This PR adds support for the DSM module made by Lemon-Rx, as well as a few changes:

• extended module type to 8 bits (255 modules possible).
• simplified MPM protocol handling (thus allowing 255 protocols instead of only 127).

TODOs:

• YAML backward compatibility
• Companion support

[jj604]

Raphael, I have emailed all the beta testers who were part of the launch of the LemonTx module and suggested they might want to test this new version. Not sure how many are running EdgeTX though. Suspect most will be OpenTX users.

[raphaelcoeffic]

Raphael, I have emailed all the beta testers who were part of the launch of the LemonTx module and suggested they might want to test this new version. Not sure how many are running EdgeTX though. Suspect most will be OpenTX users.

Hihi, so now they have a reason to switch to EdgeTX ;-)

[jj604]

Raphael, you need to understand some of these guys are using 1960’s transmitters with two single axis sticks and mechanical trims converted to 2.4. Some are even using single channel pulse proportional and galloping Ghost 2 channel on 2.4. It’s a different world! Big thanks for the Companion commit BTW. John

[pfeerick]

Surely not... next you'll say they're using reed sets and Crossfire 😮

I look forward to being able to try this out in the future, I've had some LemonRX gear in the past (stabilizer) and found it quite good. Admittedly haven't been following recent developments so after looking at the products page will have to order me some new toys 😁

Just for reference, RCG thread about the Lemon DSMP Transmitter Module, and post about EdgeTX supporting it starts here:
https://www.rcgroups.com/forums/showthread.php?3843777-The-Official-Lemon-DSMP-Transmitter-Module-Thread-%C2%96-NEW-USERS-READ-FIRST-4-POSTS/page29#post48896655

[jj604]

Yep. That’s my thread. I’m jj604 🙂

[raphaelcoeffic]

Tested independently on:

• TX16S
• QX7