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adafruit 954 serial cable
PL2303TA usb uart ttl 3.3v logic level with VCC 5V or 3.3v option flash cable for Raspberry Pi

Adafruit 954 USB serial cable

Adafruit serial cable connected to Pi
The Adafruit 954 USB serial cable can be used to:

Power the Raspberry Pi; in that case the red lead +5V should be connected as well
Have console access via a serial port (built-in Prolific USB emulator and e.g. PuTTY on Windows laptop)
When using the Adafruit 954 USB cable on Windows 7 the Prolific driver' seems already be installed, so you could skip this step. Simply connect the USB cable. You will see a device Prolific USB-to-Serial Comm Port; verify via Control Panel → System → Device Manager to get the port number.

The cable can be ordered on sinforcon aliexpress.com/store/401907

Contents [hide] 
1 Known problems
1.1 Hardware problems
1.1.1 Transparent case for the Raspberry Pi model B+ is too low
1.2 Software problems
1.2.1 Bug Check: DRIVER_IRQL_NOT_LESS_OR_EQUAL
1.2.2 Bug Check: DRIVER_POWER_STATE_FAILURE
1.2.3 Bug Check: MULTIPLE_IRP_COMPLETE_REQUESTS
1.2.4 Bug Check: BAD_POOL_CALLER
2 See also
Known problems
Hardware problems
Transparent case for the Raspberry Pi model B+ is too low
There are some problems with the transparent case of Raspberry Pi B+:

The case is too low for the Adafruit 954 USB serial cable; it bends the circuit pins
The latch does not close properly
There is no spare hole for the cable
Software problems
Driver problems; this leads to system crashes (Blue screens) and potential data loss. Very difficult to solve. Maybe another version of the driver should be installed?

Bug Check: DRIVER_IRQL_NOT_LESS_OR_EQUAL
This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high. Possibly the Prolific driver contains a bug.

See: http://msdn.microsoft.com/en-us/library/windows/hardware/ff560244%28v=vs.85%29.aspx

Bug Check: DRIVER_POWER_STATE_FAILURE
ACPI problem

Bug Check: MULTIPLE_IRP_COMPLETE_REQUESTS
A driver has called IoCompleteRequest to ask that an IRP be completed, but the packet has already been completed. Conflict amongst drivers. Most probably another driver did already process the request (and should not have done so).

Bug Check: BAD_POOL_CALLER
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