Temperature via LAN

Nano Temp is a miniature module for remote temperature reading by 1-Wire sensor (DS18B20) via LAN.

Preview

Highlights

Technical data

Power supply

  • 12-24V DC via LAN terminal – Passive PoE.

Inputs

  • 1 1-Wire bus screw terminal,
  • DS18B20 sensor,
  • measured temperature range: -55°C – 120°C.

Communication

  • 1 Ethernet 1x10Mbps port

Supported protocols

  • HTTP (GET),
  • SNMP (Trap),
  • Modbus TCP,
  • TCP/UDP (shared protocol),
  • MQTT Inveo.

Communication

Communication with the module is carried out via LAN.

The user can choose from the following methods of temperature reading:

  • built-in web server, using a standard web browser (preferred browsers are Mozilla Firefox, Opera, Google Chrome),
  • MS Windows/Linux command line,
  • Modbus TCP,
  • optionally using your own application (provided TCP protocol).

Nano Temp is equipped LEDs that indicate power supply and the moment of the temperature reading from the sensor.

Alarm

The device has a built-in alarm function. The user can set alarm low or alarm high or alarm low and high. After the alarm occurs, a virtual output will be enabled. This means that the user can check the current alarm status (via HTTP, Modbus TCP or SNMP).

Additionally, the module has the M2M function. Nano Temp can work autonomously (without user) with other products of the Nano and Lantick series. Using M2M connection, the devices create a remote relay activation path (blower, fan, heater) when alarm condition occurs.

Examples

In the Nano Temp module, there are several resources that can be read using the HTTP GET protocol.

  • status.xml – basic information about the device,
  • temp1.txt – current temperature shown in text form.

Example of the status.xml resource:

<response>
<out>00000000</out>
<on>00000000</on>
<in>00000000</in>
<counter1>0</counter1>
<temp1>34.3</temp1>
<mac>00:00:00:00:00:00</mac>
</response>

The value <on> 00000001 </ on> indicate that the alarm state occurs.

An example of how the MQTT service works:

The Nano Temp sends the current temperature to the INVEO cloud.

Data are sent every 1 minute and after every data change. After installing the appropriate MQTT application, the temperature is available directly on the smartphone.

The advantage of using the MQTT service is that you only need connect the Nano Temp to your router, configure the application on the smartphone and enjoy the remote temperature reading.

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