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DIY AUTOMATIC SOLAR CHARGE CONTROLLER
I didn't see a range specified, but with the right antenna and the ESP8266 you could get 1mile or 1.6km, if you needed more, just simply attach it to an inexpensive UBNT radio and do 300+ km at 500 Mbps or higher depending on your needs and radio. I do this daily here to get other types of data to and from station to station. I'm just using it for a much different type of data including video and images. Again, this is an amazing project, just adding another perspective to the question. Good luck on the contest. :)
I'm in no way stepping on this amazing project, it is incredible by the way, well put together and great time line of components. MortenN8 -- I again, am just adding to any response the creator may post. I would consider adding something from the ESP family like the ESP8266, and using the onboard WiFi, which if put together correctly would allow this weather station or in your case just the temperature and humidity to broadcast to your "base station" from each of the poles, especially if you have line of sight to each one. I am sure the creator will have a go to plan for you, but just wanted to add some thoughts.
This is an excellent and great use of a custom PCB! Thank you for sharing this with us, and good luck on the contest!!!!
Great job!!!! Agreed on the wax seal, excellent touch!!
Combining Inputs and Outputs
Circuit Displays Internet Data
Internet of Things Class