Transfer data using MQTT protocol

Note

Only applicable to scanners that support Wi-Fi transmission, such as DS2800.

Set up the MQTT broker server

• Use a server to host an MQTT broker; barcode data uploaded by the scanner is forwarded through the server.

Demo software

EMQX open-source download: EMQX

Test service

MQTT Broker test service example

Note

Server connection information

• Host: mqtt.handy.pub

• Port:1883

• Username: netum

• Password: netum@2022

For testing only. Do not use in production.

Configure scanner

Configure Wi-Fi and Broker

Note

• The scanner uses port 1883 by default to connect to the MQTT Broker.

• The default topic content for scanner subscriptions is device ID.

Modify MQTT connection port

Modify scanner publishing topic

Modify scanner subscription topic

Receive data

• Use MQTT client software MQTTX to connect to the Broker server and subscribe to the topic where the scanner publishes messages.

MQTTX subscription example

Development reference

• MQTT client library

• MQTT Tutorial