This is a nice LoRa sensor for measuring the pH and the temperature of your swimming pool, drainage-basin or whatever you like.
| Electronic design | LoRa T-Beam |
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| cayenne.mydevices temperature graph | cayenne.mydevices pH graph |
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- T-Beam v1.1
- Kradex case: Z74JPH TM ABS
- Kradex case plate: https://www.thingiverse.com/thing:5322236
- The User button is fitted to the case, with this button you can enable/disable the LCD backlight.
- With the MENU (Calibrate mode) button you can step through the menu: you can enable/disable GPS, and calibrate the pH-sensor with pH-buffers 4,7 and 10.
- The SET (Calibrate) button must be used to activate a specific menu option.
- Visual Studio Code with PlatformIO
- LMIC node package: https://github.com/lnlp/LMIC-node
- you need to rename the lorawan-keys_example.h file into lorawan-keys.h and change the content, see LMIC documentation.
- The pH meter must be calibrated on a regular basis, there is no temperature compensation build in, but maybe someone can add that to the software, would be nice.
- Desolder the T-Beam lIPO-holder, we don't use it: the pH-sensor drains the 18650 battery too fast.