I actually use lorawan soil moisture sensors and works extremely well. You will need a lorawan gateway though. I also use chirpstack to decode the data then send it to hydrosys via mqtt. I also share the info with HomeAssistant for more specific reporting and automation. A bit complicated but doable. I switch from wifi devices to lorawan mostly for (1) battery life is much longer, and (2) further transmission distance.

HC12 is surely a good start but I am looking at putting around 12 sensors in size of 10 acres with trees mostly in between the base and the sensor.

Do you suggest I should stick with HC12 ?

Also with HC12 we are eliminating the entire TCP/IP stack I support which otherwise is used with the WEMOS D1 hence wondering how will it affect the system?

Sorry for my queries but I am really looking to tap into long range using the wireless for the sensors to send field data!

The biggest issue with me is I am unable to purchase your hardware as I am based in India and I have to really sit figuring out a of lot of things... like I am unable to source a Digital Soil Moisture Sensor like the one you have. Making it is also not possible as I don't have the design.

I really plan to put Hydrosys4 to work in the most beautiful manner I can and will struggle but make it successful. Thank to you!!!

Actually, I share the same view. The LoRa system should have its own minimum number of elements to allow the networking and retrieving the data plus it should be able to interface other systems with a standard protocol like the MQTT. In this way you do not necessarily make a strong couple between different systems, which is good as you can have way more flexibility. Let's say the Hydrosys4 will act as controller and the LoRa system as a networking system.

I also think that LoRa is very good for large systems and it has tools to support some sort of network complexity.

For small systems, there are quite simpler and cheaper alternatives that I already integrated in Hydrosys4. It uses RF module at 433MHz HC-12. Unfortunately It requires some integration with the Arduino side so it is not exactly plug and play.

hydrosysblog.wordpress.com

Long Wireless Transmission Some months ago, I got a suggestion from my Forum user, which had a specific problem: the soil moisture sensors should be at about 500m distance from the Hydrosys4 centra…

I don't think lora needs to be integrated into Hydrosys specifically, lora is simply the physical medium for communications, essentially layer 1 of tcp/ip. You could setup a lorawan gateway that integrates to your existing network (using lorawan ethernet gateway) and have your lora devices connect to the lorawan gateway, and the gateway handles the rest. Thats my understanding anyway, but I'm only just starting to investigate lora.