B1144C not found via BLE after flashing FOSSASIA firmware: Name changed from "LSLED" to "LED Badge Magic"

[mjstahlberg]

This is a follow-up to #52 and possibly the same as #24.

After flashing badgemagic-firmware compiled from v0.1-12-g9cda337, the badge is now not found via BLE. Recall that in #52 with the OEM firmware, the badge was found but the connection failed.

I noticed that the BLE device name changed from LSLED to LED Badge Magic:

% badgemagic --transport ble --list-devices|grep LED
- […]: name=Some("LED Badge Magic") services=[0000fee0-0000-1000-8000-00805f9b34fb]

Changing BADGE_BLE_DEVICE_NAME from "LSLED" to "LED Badge Magic" resolves this issue and lets me upload examples/smiley.toml via BLE.

[kienvo]

Let's give more control to users. At the current state, we could upload bitmap content to someone's badge accidentally, especially with the coming-up always-on BLE feature. To resolve this, I've made the device name configurable in fossasia/badgemagic-firmware#67

So let UUID and device name be decided by users as arguments, and should have defaults if the arguments are not specified to avoid complexity for new users.