SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11
System description
Page 45 of 157
1.13
System features
1.13.1
Network indication
GPIOs can be configured by the AT command to indicate network status (for further details see section
and the SARA-R4/N4 series AT Commands Manual
No service (no network coverage or not registered)
Registered / Data call enabled (RF data transmission / reception)
1.13.2
Antenna supervisor
The antenna detection function provided by the
ANT_DET
pin is based on an ADC measurement as optional
feature that can be implemented if the application requires it. The antenna supervisor is forced by the
+UANTR AT command (see the SARA-R4/N4 series AT Commands Manual
The requirements to achieve antenna detection functionality are the following:
an RF antenna assembly with a built-in resistor (diagnostic circuit) must be used
an antenna detection circuit must be implemented on the application board
See section
for detailed antenna detection interface functional description and see section
detection circuit on application board and diagnostic circuit on antenna assembly design-in guidelines.
1.13.3
Dual stack IPv4/IPv6
SARA-R4/N4 series support both Internet Protocol version 4 and Internet Protocol version 6 in parallel.
For more details about dual stack IPv4/IPv6 see the SARA-R4/N4 series AT Commands Manual
1.13.4
TCP/IP and UDP/IP
SARA-R4/N4 series modules provide embedded TCP/IP and UDP/IP protocol stack: a PDP context can be
configured established and handled via the data connection management packet switched data commands.
SARA-R4/N4 series modules provide Direct Link mode to establish a transparent end-to-end communication
with an already connected TCP or UDP socket via serial interfaces (USB, UART). In Direct Link mode, data
sent to the serial interface from an external application processor is forwarded to the network and vice-
versa.
For more details on embedded TCP/IP and UDP/IP functionalities, see SARA-R4/N4 series AT Commands
Manual
1.13.5
FTP
SARA-R4/N4 series provide embedded File Transfer Protocol (FTP) services. Files are read and stored in the
local file system of the module.
