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ublox: add wait time before checking PIN status after unlock

Submitted by Aleksander Morgado

Assigned to ModemManager bug user

Link to original bug (#100980)

Description

We're sending the PIN correctly, but the modem is still replying that SIM-PIN is needed if we query it right away after sending the PIN:

<debug> [1493975621.397922] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 'AT+CPIN="8770"<CR>' <debug> [1493975621.484268] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR>``<LF>OK<CR>``<LF>' <debug> [1493975621.485273] [../../git/src/mm-broadband-modem.c:1339] modem_load_unlock_required(): checking if unlock required... <debug> [1493975621.485618] [../../git/src/mm-port-serial.c:1250] mm_port_serial_open(): (ttyACM0) device open count is 2 (open) <debug> [1493975621.486500] [../../git/src/mm-port-serial.c:1307] _close_internal(): (ttyACM0) device open count is 1 (close) <debug> [1493975621.486979] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 'AT+CPIN?<CR>' <debug> [1493975621.513303] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR>``<LF>+CPIN: SIM PIN<CR>``<LF>' <debug> [1493975621.515441] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR>``<LF>OK<CR>``<LF>' <debug> [1493975621.517437] [../../git/src/mm-port-serial.c:1307] _close_internal(): (ttyACM0) device open count is 0 (close) <debug> [1493975621.517703] [../../git/src/mm-port-serial.c:1323] _close_internal(): (ttyACM0) closing serial port... <debug> [1493975621.523061] [../../git/src/mm-port-serial.c:1371] _close_internal(): (ttyACM0) serial port closed

This means we would need to introduce an arbitrary timeout after sending SIM-PIN before we re-check whether it is required or not.

The best way to do this is actually by subclassing the send_pin() and send_puk() methods in the MMBaseSim object, and introducing the wait time after having sent the SIM-PIN and before returning from the async methods saying that the operation is finished.

Version: git master

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