SARA-R4 series - Data sheet
UBX-16024152 - R18
Page 9 of 43
1.5 AT command support
The SARA-R4 series modules support AT commands according to the 3GPP standards TS 27.007 ,
TS 27.005 , TS 27.010 , and the u-blox AT command extension.
☞ For the complete list of all supported AT commands and their syntax, see the SARA-R4 series AT
commands manual .
1.6 Supported features
Table 3 lists some of the main features supported by SARA-R4 series modules. For more details, see
the SARA-R4 series system integration manual  and the SARA-R4 series AT commands manual .
GPIO configured to indicate the network status: registered home network, registered roaming,
data call enabled, no service. The feature can be enabled through the +UGPIOC AT command.
The ANT_DET pin provides antenna presence detection capability, evaluating the resistance from
the ANT pin to GND by means of an external antenna detection circuit implemented on the
The antenna supervisor (i.e. antenna detection) feature can be enabled through the +UANTR AT
Embedded TCP and UDP
Embedded TCP/IP and UDP/IP stack including direct link mode for TCP and UDP sockets.
Sockets can be set in Direct Link mode to establish a transparent end-to-end communication
with an already connected TCP or UDP socket via the serial interface.
File Transfer Protocol functionality is supported via AT commands.
Hyper-Text Transfer Protocol functionality is supported via AT commands.
Embedded SSL/TLS 11
With the support of X.509 certificates, embedded SSL/TLS provides server and client
authentication, data encryption, data signature and enables TCP/IP applications to communicate
over a secured and trusted connection. The feature can be configured and enabled by the
+USECMNG and +USECPRF AT commands.
Device and data security 12 Device security: authentication, updates
Data security: PSK, E2E encryption, local encryption
For more details, see the security suite application note 
Message Queuing Telemetry Transport is an ISO standard publish-subscribe messaging protocol
designed for lightweight M2M communications over TCP. MQTT allows clients to communicate
one-to-one, one-to-many and many-to-one over a long-lived outgoing TCP connection.
Bearer Independent Protocol for Over-the-Air SIM provisioning.
Dual stack IPv4/IPv6
Capability to move between IPv4 and dual stack network infrastructures.
IPv4 and IPv6 addresses can be used.
MNO profiles 13
Mobile network operator profiles provide with a powerful and flexible method to configure the
SARA-R4 series modules to seamlessly work with the selected mobile network operator.
Using the MNO profiles the device is dynamically configured to use the proper bands, RATs,
power saving parameters, e-DRX parameters and the protocol stack settings needed to operate
on the selected network in full compliance with operator requirements.
Use the +UMNOPROF AT command to select a profile for the network operator.
Firmware update Over AT
Firmware module update over AT command interface.
The feature can be enabled and configured through the +UFWUPD AT command.
Firmware update Over The
u-blox firmware module update over the LTE air interface client/server solution using LWM2M.
11 Not supported by “00” product version
12 Not supported by “00”, “01”, “02” and “52” product versions
13 Not supported by “00” and “01” product versions