Set up a UAR RFID reader

Connect a UAR series reader to this demo's MQTT broker. You do not need a dashboard account to read these instructions.

1. Configure the reader

Connect the reader to the internet and note its serial number (SN).
On the reader, open 系统设置 → 输出方式 (System Settings → Output Method) and select MQTT.
Open 配置主机 (Host Configuration) and enter the connection settings below.
In 选择天线 (Select Antenna), enable the port with the connected RFID antenna.
Save the settings and reconnect the reader.

MQTT address	`tcp://mqtt-demo.webhost168.com:1883`
Backup address	`tcp://207.148.77.209:1883` if DNS is unavailable
Username	`mqttdemo`
Password	Get the demo MQTT password from your administrator.
Transport	Plain MQTT/TCP for this temporary demo; turn SSL/TLS off.

Leave the reader's default MQTT topics unchanged. Its uplink reports should appear on realopen/device_push/[SN], using its own serial number.

2. Check a scan

With a dashboard account, sign in, register the same SN, and select Start scan. Place an RFID tag near the enabled antenna. A successful read appears as an EPC in the scan session. Select Stop scan when finished.

The reader's buzzer may remain off. Its beepSwitch setting controls sound; the scan setting is autoWork. A reported scan setting of On confirms the reader changed that setting, but tag results appear only when it sends a tag report.

To watch the reader's raw reports from another computer with Mosquitto clients installed, replace YOUR_SN and PASSWORD below:

mosquitto_sub -h mqtt-demo.webhost168.com -p 1883 \
  -u mqttdemo -P 'PASSWORD' \
  -t 'realopen/device_push/YOUR_SN' -v

When a tag is read, look for its epc inside data.tagList. If the scan setting changes but no EPC arrives, check that a tag is in range and the connected antenna port is enabled.