Open by "id", which if from 0-blink1_max_devices is index
or if >blink1_max_devices, is numerical representation of serial number
@param id ordinal 0-15 id of blink1 or numerical rep of 8-hex digit serial
@return blink1_device or NULL if no blink1 found
Open by "id", which if from 0-blink1_max_devices is index or if >blink1_max_devices, is numerical representation of serial number @param id ordinal 0-15 id of blink1 or numerical rep of 8-hex digit serial @return blink1_device or NULL if no blink1 found