* GPIO refactoring GPIO now using ESP-IDF API on all chips. LEDC interrupt fix removed - no longer needed. Edited pins_arduino.h in variants according to changes in gpio. * Edited analog channels functions
* Add board "SparkFun LoRa Gateway 1-Channel". * Extend boards.txt. Source: https://learn.sparkfun.com/tutorials/sparkfun-lora-gateway-1-channel-hookup-guide/all