Ublox SARA-R4 Series User Manual (English)

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SARA-R4/N4 series-AT Commands Manual

UBX-17003787 - R09



16File System

Page 172 of 307

Module

"USER"

"FOAT"

"AUDIO"

"FOTA_EXT"

"AUDIO_EXT"

"PROFILE"

"GNSS"

SARA-R4 / SARA-N4 * * *

Table 18: Tag applicabilities to module series

SARA-R4 / SARA-N4

The files specified with the "FOAT" tag (used to specify the firmware update package file) can only be

downloaded or deleted. The +URDFILE and +ULSTFILE AT commands are not allowed.

16.2Download file +UDWNFILE

+UDWNFILE

SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412MModules

SARA-N4

Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes

partial No No No - +CME Error

16.2.1Description

Stores (writes) a file into the file system:

• The stream of bytes can be entered after the '>' prompt has been provided to the user. The file transfer is

terminated exactly when <size> bytes have been sent entered and either "OK" final result code or an error

result code is returned. The feed process cannot be interrupted i.e. the command mode is re-entered once

the user has provided the declared the number of bytes.

• If the file already exists, the data will be appended to the file already stored in the file system.

• If the data transfer stops, after 20 s the command is stopped and the "+CME ERROR: FFS TIMEOUT" error

result code (if +CMEE=2) is returned.

• If the module shuts down during the file storing, all bytes of the file will be deleted.

• If an error occurs during the file writing, the transfer is aborted and it is up to the user to delete the file.

The available free memory space is checked before starting the file transfer. If the file size exceeds the

available space, the "+CME ERROR: NOT ENOUGH FREE SPACE" error result code will be provided (if

+CMEE=2).

SARA-R4 / SARA-N4

If the HW flow control is disabled (AT+IFC), a data loss could be experienced. So the HW flow control usage

is strongly recommended. If HW flow control is not supported, the use of +UDWNBLOCK is recommended.

16.2.2Syntax

Type Syntax Response Example

Set AT+UDWNFILE=<filename>,<size>[,

<tag>]

<text>

OK AT+UDWNFILE="filename",36,

"USER"

The 36 downloaded bytes of the file!

Download audio configuration

Set AT+UDWNFILE=<filename>,<size>,

"AUDIO_EXT"

OK AT+UDWNFILE="audioconfig",4873,

"AUDIO_EXT"

16.2.3Defined values

Parameter Type Description

<filename> String File name. For file system file name and data size limits see File system limits.

Other manuals for Ublox SARA-R4 Series

System Integration Manual157 pages

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Ublox SARA-R4 Series Specifications

General

Operating Temperature	-40°C to +85°C
Category	Cellular Module
Technology	LTE Cat M1, LTE Cat NB1
Frequency Bands	B1, B2, B3, B4, B5, B8, B12, B13, B18, B19, B20, B25, B26, B28, B39
Interfaces	UART, USB, I2C, GPIO
Protocols	TCP/IP, UDP, HTTP, HTTPS, MQTT, LWM2M
Security	TLS/SSL, DTLS, Secure Boot
Certifications	GCF, PTCRB, CE, FCC, IC