Intel® Responsive Retail Sensor (RRS) Hx Series Sensor
August 2018
User & Installation Guide
Revision 0.4
Page: 27
8.1
RFID Gateway Discovery
A goal of the RFID Sensor Platform is to be as much of a “zero-conf" installation as
possible. Once power is applied, the RRS Sensor autonomously acquires a network
address via DHCP and discover the RRS Gateway. The RRS Sensor also supports
encryption via a TLS connection to the MQTT broker. An optional “provisioning tag”
containing a hash and token can be used for the RRS Sensor to authenticate the Cloud
and the RRS Gateway to authenticate the sensor as it connects. Figure 9 illustrates the
message exchange involved in this use case.
Figure 9: Device Discovery
Cloud
Gateway
Sensor
Developer
SI
NFC Provisioning of
Token
/
Hash
ntpdate <Time Server>
time sync
{:Root CA URL,
:Time Server}
REST <Root CA URL>
Root CA
{:Root CA}
Authenticate against
Hash
REST (https://rfid-gw/creds) include
Token
MQTT
Credentials
w/Public Key List
REST (http://rfid-gw/urls)
URL List
Authenticate using Root CA
REST (https) validate
Token
VALID
Set MQTT password file
Reload MQTT configuration
Connect to MQTT Broker using
Credentials
SUCCESS
MQTT
RPC Command (connect request)
RPC Command (connect response)
RPC Indication (status ready)