'station-g1'

Changes by create-pull-request action

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>

Respect GPS pins set in variant.h

* lay groundwork for a possible future architecture

* switch from feature opt-out to feature opt-in

* lay groundwork for a possible future architecture

* switch from feature opt-out to feature opt-in

* fix USE_RTC in variant.h for rak4631_epaper and t-echo

* ensure Screen.h is not included without configuration.h

Co-authored-by: Peter Lawrence <12226419+majbthrd@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

* Don't send me to null island, please

* Typo

Co-authored-by: Sacha Weatherstone <sachaw100@hotmail.com>

Fix formula to consider Bandwidth in kHz

Updated the frequency selection formula

Allow range test module to loop back messages

fix comments in smart position

Allow up to 500mW transmission power for EU868 region

Removed comment about frequency hopping due to lack of universal hardware support

The European Union regulations clearly state that the power limit for this frequency range is 500 mW, or 27 dBm. goTenna Mesh uses the same frequency range and power limit too.

It also states that we can use interference avoidance and spectrum access techniques to avoid a duty cycle.

It might be worthwhile in the future to implement frequency hopping to avoid duty cycling.

(Please refer to page 69 in the following document)
        https://ec.europa.eu/growth/tools-databases/tris/index.cfm/ro/search/?trisaction=search.detail&year=2021&num=528&dLang=EN

* Set last gps coordinates after comparison

* Wrong spot