Temperature via LAN
Nano Temp is a miniature module for remote temperature reading by 1-Wire sensor (DS18B20) via LAN.
Preview
Highlights
Technical data
| Configuration way | embedded www server |
| Number of inputs | 1 |
| Sensor type | DS18B20 |
| Supply voltage | 10-24VDC Passive PoE |
| Interface | RJ45 (10BASE-T) |
| Supported protocols | HTTP, TCP, SNMP, MODBUS TCP, |
| Working temperature | 5 – 50 °C |
| Storage temperature | -10 to 85 °C |
| Humidity | 5-95% |
The module is adapted to supply DC 10-24V. Power is held by the POE adapter (included with the device).
Communication
Communication with the module like the temperature is carried out via LAN.
The user can choose from the following feature of temperature reading:
- built-in web server, using a standard web browser (preferred browsers are Firefox, Opera, Chrome),
- the command line MS Windows / Linux OS – HTTP,
- Modbus TCP protocol,
- optionally using your own application (available TCP protocol).
Nano Temp has LEDs that indicate power supply and the moment of the temperature reading from the sensor. Supported protocols:
- HTTP (GET),
- SNMP (TRAP),
- Modbus TCP,
- TCP (available protocol).
Alarm
The device has built-in alarm function. The user can set alarm low or alarm high or alarm low and high. If alarm occur the virtual output will enable. That means the user can easily check (via HTTP, Modbus TCP or SNMP) the current alarm status.
Additionally, the module has the M2M function. Nano Temp can work autonomousily (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.