meintennisplatz.de
Courts, schedules and members of a club in one place. Members see which courts are free and book online, without phone calls or notes on the clubhouse door.
Open meintennisplatz.deOwn projects, from circuit board to app.
TexhFexLabs is the label under which Felix Knoll develops and runs software and hardware projects.
Projects
HydroNode
ESP32, Arduino and LoRaWAN devices send their readings to HydroNode. There they are stored, charted and checked for outliers. Firmware updates arrive over the air. HydroNode is free for up to 20 sensors.
Open hydronode.tech
The iPhone app
Readings, map, anomalies and updates. With widgets and notifications when a value is out of range.
- Sign-in
- Overview
- Sensor history
- Station map
- Anomalies
- Live console
- Firmware update
HydroNodeStation
The station runs on a small solar panel and a battery, with no mains power and no Wi-Fi. It sends its readings to HydroNode over LoRaWAN. It measures CO₂, particulate matter, temperature, humidity, air pressure and UV.
Board, firmware and enclosure are open source, and the enclosure is 3D printed. One station is already measuring outdoors.
News
All posts- HydroNode in October: updates over the air, builder and battery modeWhat HydroNode gained in October: updates for the whole fleet, the Device Builder, battery mode with standby, the device console and alerts when a sensor goes quiet.
- meintennisplatz.de: new design, club calendar and remindersmeintennisplatz.de has a new design with light and dark mode, plus a club calendar, bookings in your own calendar and reminders before a match.
- New website, new marktexhfexlabs.de has been redesigned: calmer, prerendered, in German and English and with its own mark.
Open source
The building blocks around HydroNode are public on GitHub, from the monitoring station to the Home Assistant integration.
All repositories on GitHub- HydroNodeStationSolar-powered LoRaWAN monitoring station with its own board (STM32WLE5) and six sensor channels.C
- hydronode-firmwareFirmware for ESP32 and ESP8266. Set up and flashed in the browser, signed updates arrive over the air.C++
- hydronode-esphomeESPHome component that connects sensors to HydroNode in YAML and signs every upload.Python
- hydronode-homeassistantHome Assistant integration with auto-discovered sensors and live values. Installable via HACS.Python
- HydroNode-LibraryArduino library that sends signed readings and receives remote commands.C++
About TexhFexLabs
TexhFexLabs is a one-person project. Development, hardware and running the servers are in one hand. Questions about a project or interested in using HydroNode for your own measurements? A short email is enough.