Scenario: The Uno is being powered by USB for programming, and the HC-12 wireless communications module is wired correctly. But it will not work.
In reading through the web literature, it is mentioned that to use the HC-12 in the high-power (100 mW) mode requires a power supply in excess of what the laptop's USB port will provide.
I am finding nothing on Stackexchange that addresses this issue.
So the question is, how do I get the power to run the Uno with the HC-12? I need to be able to periodically update the programming and test it while that auxiliary power is applied, and need to know it is safe to do so.