Return cache index for a given blink1 id (0-max or serial number as uint32) @param i blink1 id (0-blink1_max_devices or serial as uint32) @return cache index or -1 if not found
See Implementation
Return cache index for a given blink1 id (0-max or serial number as uint32) @param i blink1 id (0-blink1_max_devices or serial as uint32) @return cache index or -1 if not found