Rev 3
- A bluetooth chip and a processing chip
- Requires two update files when updating firmware, a DCK file and a BLE file
- Denoted by having a 3.#.#.# firmware
- Does not show blue LED during bootup
Rev 4
- Has a singular chip that stores processing and BLE data
- Requires one file when updating firmware, a DCK file
- Denoted by having a 4.#.#.# firmware
- Created to deal with chip shortage during 2020
- Denoted by blue LED flash during bootup