credit AmadeusGhost https://github.com/AmadeusGhost/lede/
Spectrum SSH Askey RAC2V1K Support
Askey SSH https://www.manualslib.com/manual/1337390/Askey-Rac2v1k.html?page=115#manual
patch and firmware(not test! )
https://drive.google.com/drive/folders/1R3jNQvHQBEE7QK5Cb9NJXoyHJ_p5-PmO?usp=sharing
TTL(2.0MM dupon cable)
white-TX yellow-RX black-GND (do not connect VCC！)
