Prototype testing
Our energy-autonomous logger defies the German winter.
To validate the TX1000 datalogger’s power management and reliability under real conditions, we deployed a prototype in November 2025. As spring approached in early March 2026, we are happy to report zero data gaps and no power failures.
Measurement station setup
We installed our first field prototype in Au, located south of Freiburg. The site conditions can be described as mediocre, with certain shading from the hills and a fog tendenacy in the valley. We especially wanted to validate if the 8 Ah lithium battery and 50W solar panel can deliver uninterrupted power supply while dealing with cold-induced battery discharge and reduced solar-recharge. Four ports were occupied by SDI-12 sensors, while three ports measured analog. The measurement intervals were set between 1 to 10 minutes and data were transferred every 15 minutes to the database via LTE.
In our database we can nicely see the uninterrupted timeseries data from the connected sensors. We further receive control data such as current battery voltage, which shows the traditional battery re- and discharge curve throughout the day. This data sets an alarm in case the current reaches a minimum or maximum threshold.
We further checked how the logger deals with exhausted mobile data. As expected, all sensor data was written to the flash memory for a week and once we re-activated mobile data, it was sent to our database without losing a single package.
Following the successful test phase, the monitoring station will remain in operation to further assess the logger’s long-term durability. Power demand will be increased through the integration of high-energy sensors and scheduled daily online connectivity to allow for remote configuration.