User manual

13
 low level: 0...1V
 high level: 12…30V
 ESD protected
 under full control of embedded application
GT864 PY Pin Layout for Mini USB connector:
The GT864 Terminals with a hardware revision of G or higher have an internal GSM module
that is upgraded from a GE864 to a GE865.
The Python enabled version of the GT864 terminal family has some special considerations that
should be considered when using the newer module. Fortunately the Python script interpreter
should be 100% compatible between the modules.
However to accommodate the new module it was necessary to internally remap the General
Purpose I/O pins made available via mini USB connector on the terminal. The same
functionality should available from these pins as on the previous terminal however any Python
code will have to modified to reflect the changes in the I/O used. The following table describes
how the I/O mapping in the new module compares to the I/O mapping in the old module.
GE864 based GPIO
GE865 based GPIO
Mini USB
Mini USB PIN
GPIO 11
GPIO 5
IN1
1
GPIO 12
GPIO 6
IN2
2
GPIO 13
GPIO 7
IN3
3
GPIO 14
GPIO 8
IN4
4
-
-
GND
5
Table 5:GT864 PY Pin Layout for Mini USB connector
All inputs are under control of an embedded application script or at-commands!
The following commands have to be used to initialise and to read the status of the GPIOs:
at#GPIO=5,2,0 (read GPIO5, PIN1 Mini USB)
at#GPIO=6,2,0 (read GPIO6, PIN2 Mini USB)
at#GPIO=7,2,0 (read GPIO7, PIN3 Mini USB)
at#GPIO=,8,2,0 (read GPIO8, PIN4 Mini USB)
2.3 Antenna Connector
The antenna connector allows transmission of radio frequency (RF) signals between the
modem and an external customer-supplied antenna. The modem is fitted with a 50Ω, FME
male coaxial jack.