Hardware Adapter 3.1-1

What's Changed Hardware

• Replace bus connector, as v3.1 connector is not available at JLCPCB anymore

What's Changed Firmware

• Feature: Implement RX functionality of v3.1 in the firmware by @DaSchaef in #23
• fix HTML title + logo as SVG by @jschroeter in #24
• Home Assistant MQTT Discovery by @DaSchaef in #18

Full Changelog: 3.1...3.1-1