Introducing Easynow - an ESPHome component to make sensor proxying via ESPNow easy in ESPHome.

I think my ESPNow proxy components are now working well enough to release.

https://gitlab.com/ripnetuk-public/espnow/ripnetuk-esphome-easynow

It can be used in ESPHome simply by adding YAML, since ESPHome can pull external components direct from a Git repo - well done ESPHome :)

Initial tests are good - using the same device that I was getting roughly 8 hours out of (from a discarded [popular device] - 700maH), 

On previous measurements, I was timing the main part of the discharge curve, from 4v down to 3v, and was getting approx. 8-9h of runtime. This was taking a reading every 60s and passing to HomeAssistant via the regular API (ie, using the built in ESPHome stuff)

BEFORE Easynow

So it was taking between ~18:00 to ~02:45 to discharge from 4v to 3v. Thats about 8/9 hours.

WITH Easynow

Well, this is awkward. Its worked so well that after 8 hours, it havent even yet got down to the 4v ive been testing at:

yet its still successfully reading the temperature every 30s:

So far, id call that a win :)

And, I suspect at this point, the quick n' dirty voltage measurement I am using (a simple potential divider across +bat and gnd) is actually sucking up most of the power while sleeping.

Next step is to build another ESP32 into a proper ADC with a full range up to 4.2v using an external ADC, and to measure the current using my multimeter (which seems to have a 20uf range, never used it though).