MC-A42: Anjoy module; the older revision is SSC337 + SC401AI

Chip and memory
- "older MC-A42 - SSC337/sc401ai" (https://t.me/c/1809358416/52079)

Sensor
- SmartSens SC401AI on the older MC-A42 (https://t.me/c/1809358416/52079)

Variants, aliases and products built on it
- "MC-A42 is 335, MC-A42P is 377" (https://t.me/c/1166652144/72882)

Disagreements
- SoC: in 2023-09 Tino wrote SSC335 (https://t.me/c/1166652144/72882); in
  2024-01 he gave SSC337 for the older MC-A42, matching the catalogue
  (https://t.me/c/1809358416/52079)
- Sensor: the catalogue has none; Tino names SC401AI
  (https://t.me/c/1809358416/52079)