GT863-PY Terminal Product Description
80269ST10026a Rev. 2 - 18/03/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 36 of 51
port but just an internal software bridge between Python and mobile internal AT command
handling engine. All AT commands working in the Telit module are working in this software
interface as well. Some of them have no meaning on this interface, such as those regarding
serial port settings. The usual concept of flow control keeps its meaning over this interface,
but it's managed internally.
• The MDM2 interface is the second interface between Python and mobile internal AT
command handling. It is used to send AT commands from Python script to mobile and
receive AT responses from mobile to Python script when the classic MDM built-in module
already in use.
• The SER interface allows Python script to read from and write to the real, physical serial
port where usually the AT command interface resides, for example to read NMEA
information from a GPS device. When Python is running this serial port is free to be used
by Python script because it is not used as AT command interface since the AT parser is
mapped into the internal virtual serial port. No flow control is available from Python on this
port.
• The SER2 interface allows Python script to read from and write to the real physical serial
port ASC1, that is usually available for trace and debug.
• The GPIO interface allows Python script to handle general purpose input output faster than
through AT commands, skipping the command parser and going directly to control the pins.
• The MOD interface is a collection of useful functions.
• The IIC interface is an implementation on the Python core of the IIC bus Master. It allows
Python to create one or more IIC bus on the available GPIO pins.
• The SPI interface is an implementation on the Python core of the SPI bus Master. It allows
Python to create one or more IIC bus on the available GPIO pins.
For the debug, the print command is directly forwarded on the EMMI TX pin (second serial port) at
baud rate115200bps 8N1.
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