Everything at a glance – local display applications for data loggers

Microtronics data loggers are easy to commission and configure via the web interface of the myDatanet portal. As soon as the device is in operation, the collected data is transferred to the platform where it can be visualised, evaluated and , if necessary, further processed. For some applications, however, there is also a need to display information and measurement data directly on the device. In the following article , we present two solutions for local display and operation.

15. Jul 2025

written by

Franz

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Text display on the myDatalogEASY IoT

The “Serial” LCD dot matrix series from “Display Visions ” is available in a wide range of variants. From 1 to 16 lines with different numbers of characters and different colours and lighting. A supplied bezel or an optional snap-in housing can be used for easy mounting. The displays require a 5V supply as standard, but are also available with an optional 9-35V wide-range supply input. The displays are controlled via the serial RS232 interface.

In this application example, the “4-channel data logger IoT app” was slightly adapted using the Studio development environment so that the measured values and status information of the 4 universal inputs of the myDatalogEASY IoT are also output to the RS232 interface at the measurement interval and thus shown on the connected display.

This display series can also be operated on the myDatalogC3. Display navigation or simple operation of a control application could also be realisedvia an optional keyboard input on the displays.

Modbus touch panel on myDatalogC3

Display Visions’ brilliant HMI displays are available in sizes ranging from 2.8″ to 10″ and can be mounted on a wall or panel. The free WYSIWYG tool, ‘HMI Designer’, allows you to create custom display pages using drag-and-drop and load them onto the display. Dynamic content, such as text, numbers, bar graphs and images, can be linked to freely definable Modbus registers that can ultimately be written to or read from by myDatalogC3.

The displays have a 5-30V wide-range supply input and can be controlled via Modbus RTU/RS485.

In this application example, the “myDataconC3 MBM IoT app ” has been slightly adapted so that the measured values of the universal inputs are written to the Modbus output channels in the measuring interval in order to visualise them on the display. In the same way, control value specifications and switching commands can be read from the display in the opposite direction.

This display series can be used in conjunction with the myDatalogEASY IoT. However, due to its higher power consumption, the display is only suitable for limited energy-autonomous operation. Accordingly, the display can be used with the myDatalogEASY IoT and an external constant supply voltage.

Conclusion

With the display solutions presented , a local display of data or a local input option can be realised with little additional effort. The implementation of displays from other manufacturers is conceivable and can be tested by Microtronics.

Compatible data loggers

Would you like support for the local display application? We are happy to support you.

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Everything at a glance – local display applications for data loggers

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