Ublox SARA-R4 Series User Manual (English)

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

UBX-17003787 - R09

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23I

Page 243 of 307

23I

23.1Introduction

The I

C AT commands support communication with more than one connected device via one of the controllers,

but require opening and closing a logical channel for each connected device. Only one logical channel at a time

can be opened.

The availability and hardware description of the I

C interfaces are out of the scope of this document and

are described in a separate document. Refer to the corresponding module System Integration Manual.

The procedure for communicating with two different devices is:

• Open the logical channel for device1 (with AT+UI2CO)

• Read/write to/from device1 (with AT+UI2CR, AT+UI2CW and +UI2CREGR)

• Close the logical channel for device1 (with AT+UI2CC)

• Open the logical channel for device2 (with AT+UI2CO)

• Read/write to/from device2 (with AT+UI2CR, AT+UI2CW and +UI2CREGR)

• Close the logical channel for device2 (with AT+UI2CC)

Once the controller has been configured, it is possible to start I

C communication (read/write) with I

C slave

peripherals.

The I

C controllers available on the u-blox cellular modules module work only in Master Mode so they can

be connected to slave devices only.

In case of a controller/device malfunction, the command's response is only "ERROR".

23.2I

C open logical channel +UI2CO

+UI2CO

SARA-R410M-02B SARA-R410M-52B SARA-R412MModules

SARA-N4

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

full No No No - +CME Error

23.2.1Description

Changes the hardware and logical configuration of the selected I

C controller.

It is only possible to configure the I

C controller in Master Mode.

This command selects:

• The controller available in the u-blox cellular module

• The bus mode type

• The bit rate

• The address size (7-10 bit address)

• The slave device address

Once the selected controller has been configured, a logical channel between it and the selected slave device is

set up and there is no need to further specify it. All the following I

C write, read and close commands refer to

the currently opened logical channel. It is not possible to use the I

C write, read and open commands for writing

or reading to/from a different slave device without first closing the I

C logical channel.

23.2.2Syntax

Type Syntax Response Example

Set AT+UI2CO=<I2C_controller_

number>,<bus_mode>,<bit_rate>,

<device_address>,<address_width>

OK AT+UI2CO=1,0,0,0x42,0

Test AT+UI2CO=? +UI2CO: (list of supported <I2C_

controller_number>s),(list of

+UI2CO: (1),(0-1),(0-1),(0x000-0

x3FF),(0-1)

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