Hi all. Hope everyone is well and safe.
On my first post, I've laid out the problem and what I will be monitoring.
Data collection
One enclosure (transparent lid) and one Arduino MKR 1300 WAN will be used to collect data.
The enclosure will be put inside the water (at this time, it is around 0 degrees C).
Since LoRa cannot transmit (very difficult to) inside water, the Arduino MKR 1300 WAN will be connected to an outside antenna.
Here is an interesting post and math formulas to calculate attenuation inside water (and salt water) that you can read:
The Arduino will monitor the following parameters:
- Temperature (inside and outside)
- TDS
- PH
The enclosure inside the water will have the following components:
- Arduino MKR 1300
- DS1820 waterproof temperature sensor (outside the enclosure)
- TDS sensor (with the sensor outside the enclosure)
- Grove base shield
- temperature sensor (to measure the temperature inside the box)
- Led sensor: will light up if everything is fine at the moment.
The Arduino MKR 1300 WAN will be powered using 2x AA batteries (or a Lipo battery - still to be decided) with voltage monitoring so when the time comes, I know when to change them.
Because the PH sensor cannot stay in the water for a long time, a separate "box" will be created, with a ESP32 that will send the values to Arduino Cloud IOT
Data receiving
For receiving data, the other Arduino MKR 1300 WAN will be used.
The data will be stored in Arduino Cloud IOT. A raspberry PI will be used to display a dashboard.
Problems
Like all projects, problems will find its way .
I'm hopping not to have leaks in the enclosure - 
.
I'm expecting some difficulty with LoRa communications - this is my first time using it, like it's also my first time working with the Arduino Cloud.
When they appear (and also others I'm not expecting), they will be dealt with.
Happy projects and stay safe.