Added PA1616S GPS module (#5157)

* Added GPS chip PA1616S

GPS chip PA1616S is used in some recent Adafruit GPS breakout boards.

* Update GPS.cpp

---------

Co-authored-by: picusviridis <[email protected]>

src/gps/GPS.cpp

@@ -476,6 +476,18 @@ bool GPS::setup()
             // Switch to Fitness Mode, for running and walking purpose with low speed (<5 m/s)
             _serial_gps->write("$PMTK886,1*29\r\n");
             delay(250);
+        } else if (gnssModel == GNSS_MODEL_MTK_PA1616S) {
+            // PA1616S is used in some GPS breakout boards from Adafruit
+            // PA1616S does not have GLONASS capability. PA1616D does, but is not implemented here.
+            _serial_gps->write("$PMTK353,1,0,0,0,0*2A\r\n");
+            // Above command will reset the GPS and takes longer before it will accept new commands
+            delay(1000);
+            // Only ask for RMC and GGA (GNRMC and GNGGA)
+            _serial_gps->write("$PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n");
+            delay(250);
+            // Enable SBAS / WAAS
+            _serial_gps->write("$PMTK301,2*2E\r\n");
+            delay(250);
         } else if (gnssModel == GNSS_MODEL_ATGM336H) {
             // Set the intial configuration of the device - these _should_ work for most AT6558 devices
             msglen = makeCASPacket(0x06, 0x07, sizeof(_message_CAS_CFG_NAVX_CONF), _message_CAS_CFG_NAVX_CONF);
@@ -1144,6 +1156,7 @@ GnssModel_t GPS::probe(int serialSpeed)
     delay(20);
 
     PROBE_SIMPLE("L76B", "$PMTK605*31", "Quectel-L76B", GNSS_MODEL_MTK_L76B, 500);
+    PROBE_SIMPLE("PA1616S", "$PMTK605*31", "1616S", GNSS_MODEL_MTK_PA1616S, 500);
 
     uint8_t cfg_rate[] = {0xB5, 0x62, 0x06, 0x08, 0x00, 0x00, 0x00, 0x00};
     UBXChecksum(cfg_rate, sizeof(cfg_rate));

src/gps/GPS.h

@@ -34,6 +34,7 @@ typedef enum {
     GNSS_MODEL_UC6580,
     GNSS_MODEL_UNKNOWN,
     GNSS_MODEL_MTK_L76B,
+    GNSS_MODEL_MTK_PA1616S,
     GNSS_MODEL_AG3335,
     GNSS_MODEL_AG3352
 } GnssModel_t;