TinyGPS++ — compact NMEA-0183 parser ported to ESP-IDF. No Arduino dependency. millis() is implemented via esp_timer_get_time(). Parses GGA and RMC sentences; exposes location, date, time, speed, course, altitude, satellite count, HDOP, and arbitrary custom terms.
Runtime hot reload for ESP chips - load and reload ELF modules without reflashing. Enables rapid iteration during development by updating code over HTTP while the device keeps running.