Add further clarification on mapping assumptions
Marketed as Lianguo ZX-SWTGW215AS
LED Double blink while button is held FAST blink for 3 seconds when config is reset
Blocking by design to prevent loading config Button must be held between 10 and 30 seconds to trigger reset. If held more than 30 seconds, boot normally. This is to prevent lock-up in case of weird hardware variants.