5-15 WAKEUP
Description: Wakeup scanner when it’s been in Sleep state
Command format: Null (0x00)
If RS232 cable is currently applied and Deep sleep(see
“4-5 Scan mode & some global settings”
)is
enabled, the scanner can enter Sleep State more deeply. And at this case, it is necessary to send a
command WAKEUP (0x00) and delay for 15ms, before sending any other commands.
Host Requirements
Once the WAKEUP command is sent, the host must wait at least 15 ms for the scanner to be ready, then
but send other any commands within 30 seconds (default, see
“4-5 Scan mode& some global settings”
).
Scanner Requirements
The scanner must not return to deep Sleep state for at least 30 seconds after waking up.
The mechanism to wake up a scanner in this manner also works if characters other than
WAKEUP(0x00) are sent to the scanner. There is, however, no guarantee that these commands are
interpreted correctly upon power-up. Therefore, it is not recommended that characters other than
WAKEUP be used to awaken the scanner.
The WAKEUP command has no effect if the scanner is in Awake state. If the host is unsure of the
scanner power state, it can send some WAKEUP commands anytime it wants to communicate with the
scanner, and waits at least 15 ms then sends the command.
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