UONO: from power-on to live data

1. Before you start

   • Mount UONO in a standard 96 × 96 mm panel cut-out.
   • Power: 9–30 V DC (12 or 24 V typical). Connect field wiring to the rear screw terminals as marked on the label.
   • For 4G, insert a data-enabled SIM card. For WiFi, keep the network name and password ready (2.4 GHz networks only).
   • Note the device ID shown on the label and the screen, for example HX-PANEL-775124.

2. Open the setup page

   On first start-up UONO creates its own WiFi network:

   • Network name: HX-SETUP- followed by the end of the device ID
   • Password: hexitronics
   • Connect your phone or laptop, then open 192.168.4.1 in the browser. The address is also shown on the device screen.

   The setup network comes back by itself if the device has no internet connection for a while. To open it any time, hold the setup button for 5 seconds.

3. Internet: WiFi and 4G

   • WiFi tab: choose your network, enter the password and save. UONO prefers WiFi when it is available.
   • Cellular tab: enter the APN of your SIM operator (for example airtelgprs.com for Airtel).
   • When WiFi or its internet connection drops, UONO switches to 4G by itself and returns to WiFi once it recovers.

4. Cloud connection

   The Cloud tab comes pre-set for UONO Cloud by Hexitronics. Change it only if you were given details for your own MQTT server. The screen shows when the cloud connection is up.

5. Modbus devices

   • Wire RS-485 A and B to the meters in a daisy chain. If nothing answers, swap A and B.
   • In the Modbus tab, set the bus baud rate and parity to match your meters, then add each slave with its ID.
   • Add the registers you need for each slave: function code, address, data type and word order, as listed in the meter’s Modbus manual.
   • The Live tab shows each value as soon as it is read, so you can confirm the wiring on site.

6. Analog and RTD inputs

   • Analog In tab: 2 × 4–20 mA and 2 × 0–10 V inputs. Give each a name, unit and range so values appear in engineering units.
   • RTD tab: choose PT100 or PT1000 for the temperature input.

7. Check it works

   • The device screen shows the live values and the connection (WiFi or 4G).
   • Sign in to UONO Cloud to see the dashboard, or look the device up on Find my device to see whether it is online.
   • Register the device so our team has your installation details on file.

Troubleshooting

The device shows offline

Check the power supply first. On WiFi, confirm the network is 2.4 GHz and the password is correct. On 4G, confirm the SIM has an active data plan and the APN is right. Signal strength is shown on the screen; move the antenna or the panel if it is very weak.

I can’t find the HX-SETUP network

Hold the setup button for 5 seconds and wait about 30 seconds. Make sure your phone is not set to join only saved networks, and that you are close to the panel.

A Modbus meter shows no reply

Check that the slave ID, baud rate and parity in UONO match the meter. Swap A and B. Make sure no other master is on the same line. On long cables, terminate the bus at both ends.

Values look wrong (very large or upside down)

The register is probably decoded in the wrong format. Change the data type or the word order for that register in the Modbus tab and compare with the meter’s display.

An analog value is stuck at zero or full scale

Check the wiring polarity and the input type (4–20 mA or 0–10 V). A 4–20 mA loop below 4 mA usually means an open circuit.