Opening /dev/cu.vLinkerMC @ 38400 baud (settle 2.0s)...
-> b'ATZ\r'
<- 20 bytes:
   hex   : 41 54 5a 0d 0d 0d 45 4c 4d 33 32 37 20 76 32 2e 32 0d 0d 3e
   ascii : 'ATZ\r\r\rELM327 v2.2\r\r>'

Something answered -- the link is alive. If this was an ELM327 adapter and the response doesn't look like an ELM327 banner/prompt, the issue is likely in how tunie is talking to it, not the link itself.

(full session log: logs/tunie-raw-20260826-193133.txt)