What is MQTT?
MQTT, also called Message Queuing Telemetry Transport, is an internet protocol designed for constrained devices with low-bandwidth. It allows users to send commands to remotely control DO via MQTT, read and publish data from sensor nodes and much more. It is commonly seen in the IoT (the Internet of Things) applications, where admins can easily establish a communication between multiple devices and realize centralized management.
This guide tells you how to remote control DO via MQTT in just a few minutes.
Gateway Configuration
Note: Gateway firmware version should be above 80.0.0.28. You can download the latest firmware here.
Step 1: navigate to “LoRaWAN/Network Server/Applications/”, click the Edit button.
Step 2: configure MQTT Parameters
Step 3: configuring MQTT.fx
Step 4: subscribe Uplink Topic
Step 5: control the DO
1. When Downlink Data is blank on gateway
Publish Topic Format :
application/[applicationID/device/[devEUI]/tx
Sample :
application/1/device/24e1612292633821/tx
2. When Downlink Data is filled
Filling example:
/milesight/downlink/$deveui
Publish Topic Format :
/milesight/downlink/[devEUI]
Sample :
/ursalink/downlink/24e1612292633821
Command
For UC1122 & UC1152
Set DO1 high
{"confirmed": true,"fport": 85,"data": "CQEA/w=="}Set DO1 low
{"confirmed": true,"fport": 85,"data": "CQAA/w=="}For UC1114
Set DO1 high
{"confirmed":true,"fport":85,"data":"CQEA/w=="}Set DO1 low
{"confirmed":true,"fport":85,"data":"CQAA/w=="}Set DO2 high
{"confirmed":true,"fport":85,"data":"CgEA/w=="}Set DO2 low
{"confirmed":true,"fport":85,"data":"CgAA/w=="}
For UC11-N1 and UC500 series
Set GPIO1/DO1 high
{"confirmed": true,"fport": 85,"data": "AwEA/w=="}Set GPIO1/DO1 low
{"confirmed": true,"fport": 85,"data": "AwAA/w=="}Set GPIO2/DO2 high
{"confirmed": true,"fport": 85,"data": "BAEA/w=="}Set GPIO2/DO2 low
{"confirmed": true,"fport": 85,"data": "BAAA/w=="}
Note: the above payload can be used to sent in Gateway->Network server->Date page to send to the controller in Base64 as well.