Module for GPS AT6558

The module name AT6558.
The module features:

• parses all NMEA sentence types
  
• you can set callback for each sentence type
  
• you can configure AT6558 baud rate, frequency of measures, frequency of output for each sentence type, select NMEA protocol version, save config, restart with different options (warm, cold, factory reset)
  
• callbacks for location, speed and course change
  
• accumulates distances derived from locations and from speed.