A couple of years ago I posted a request for help putting together a wireless ultrasonic sensor to monitor the water level in the well/tanks at our cottage. In the past few years I've put together a few efforts that had moderate success. I designed and tested a wireless/sensor with alarm and emergency shutoff that works pretty well - in the spring and winter - when the foilage isn't too dense. It's designed around the NRF24101 transceiver. I'm going to put the design up later this fall.
The problem is it can't cut through thick foilage: I've just tried out a Ra-02 transceiver. I found an easy setup to send and receive temp/humidity and put it together and took it up to the well. It seems to broadcast pretty well - which was a pleasant surprise.
MY PROBLEM is there is almost no info marrying the Ra-02 with an ultrasonic sensor. I've spent hours googling, without result. There is a couple that do use it (or SX1276) to broadcast to a gateway... but since we have no internet at the cottage, that isn't an option. I just want to send the resulting data from the sensor to a receiver - directly.
I realize that the SX1276 sends packets in a somewhat slower way than the NRF24101 sends data - but that's not an issue. I don't want to track a speeding car - just water level, so there can be up to several minutes between resends.
I'll keep working on it, trying to marry the LoRa library examples with the NewPing library. If anybody has some experience doing this I'd love to know about it. I'll be happy to share my final results.