OL2385SWUG datasheet(2/64 Pages) NXP

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NXP Semiconductors

OL2385SWUG

SIGFOX software driver

OL2385SWUG

All information provided in this document is subject to legal disclaimers.

User guide

Rev. 2.1 — 6 April 2018

2 / 64

unauthorized use, even if such claim alleges NXP was negligent regarding the design or

manufacture of the part.

NXP and the NXP logo are trademarks of NXP B.V. All other product or service names

are the property of their respective owners. © NXP B.V. 2018.

2 Introduction

The main intention of this user guide is to enable engineers to set up OL2385 based

SIGFOX boards for testing. This user guide explains how to use the OL2385 transceiver

for rapid prototyping of microcontroller based SIGFOX applications. It also contains

a basic introduction to the SIGFOX ecosystem, an explanation regarding necessary

registration of devices at SIGFOX network for demo evaluation and basics of SIGFOX

P1 certification testing. This documentation also describes how to install and use the

SIGFOX hardware/software setup.

The OM2385/SF001 development kit is an evaluation platform based on the OL2385

chip. See the OL2385 data sheet for detailed information.

3 SIGFOX network architecture

SIGFOX is an operated telecommunication Low-Power Wide-Area (LPWA) public

network, dedicated to the Internet of Things. This telecommunication technology has

been created with the sole focus on small messages that are transmitted on the radio

only very few times per day (12 bytes messages uplink up to 140 times per day and 8

bytes messages downlink up to 5 times per day). It is not appropriate for high-bandwidth

applications, such as multimedia and permanent broadcast. The SIGFOX network

operates at sub-GHz frequencies on ISM bands, for example, 868 MHz in Europe/

ETSI and 902 MHz in the US/FCC. This Ultra-Narrow Band (UNB) modulation based

technology has 162 dB budget link, which enables long range communications. These

SIGFOX messages, containing a payload of up to 12 bytes, are transmitted by a radio

transceiver chip into the SIGFOX network, which is then received by a SIGFOX base

station. NXP plays the role of this transceiver chip provider in the SIGFOX ecosystem.

There are four roles in the system:

• Modem manufacturers provide transceiver chips running with a SIGFOX software

protocol stack and identified by a unique id/private key (used for encrypting the radio

messages). These transceivers will be integrated in final modules that are sold to end

customers. The modules must have a network registration containing the following

information:

– ID

– Porting authorization code (PAC), one time use only

– Certificate number given by the product manufacturer (P_xxxx_xxxx_xx)

The trio of key, ID and PAC is provided by SIGFOX to modem manufacturers. These

manufacturers flash this information in nonvolatile memory of their IC during production.

The ID and PAC can be retrieved by the user and thus are sharable entities. However,

the encrypted key should not be shared, visible, or retrievable by anyone. It must

reside inside a protected area of memory where it is only readable by the firmware for

encryption purposes only. It should not be writable by anyone after production.

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