labelwriter / core/src / build550StatusRequest
Function: build550StatusRequest()
build550StatusRequest(
lock?):Uint8Array
ESC A <lock> — Request Print Engine Status.
Lock semantics per spec p.13: 0 = no lock (heartbeat / status query during error / between-label query) 1 = lock interface for printing (acquire before sending a job) 2 = status query between labels in an active job (does not block)
Parameters
lock?
0 | 1 | 2
Returns
Uint8Array