Skylab GPS Module MT3329 SKM53 with Embedded GPS Antenna Arduino Compatible

SKM53 Series with embedded GPS antenna.It is based on MediaTek3329 single-chip architecture.SKM53 can be applied in a portable device and receiver like PND, GPS mouse, car holder, personal locator, speed camera detector and vehicle locator.

Features
- Ultra high sensitivity: -165dBm
- 22 tracking/66 acquisition-channel receiver
- WAAS/EGNOS/MSAS/GAGAN support
- NMEA  protocols (default speed: 9600bps)
- Internal back-up battery and 1PPS output
- One serial port and USB port (option)
- Embedded patch antenna 18.2 x 18.2 x 4.0 mm
- Operating temperature range: -40 to 85
- RoHS compliant (Lead-free)
- Tiny form factor 30mm x20mm x 11.4mm

Specifications:

 

Receiver Type	L1 frequency band, C/A code 22 Tracking / 66 Acquisition-Channel
Sensitivity	Tracking Acquisition	-165dBm -148dBm
Accuracy	Position Velocity Timing (PPS)	3m 3D RMS without SA 0.1m/s without SA 60ns RMS
Acquisition Time	Cold Start Warm Start Hot Start Re-Acquisition	36s 33s 1s <1s
Power Consumption	Tracking Acquisition Sleep/Standby	<30mA @ 3V Vcc 40mA TBD
Navigation Data Update Rate	1Hz
Operational Limits	Altitude Velocity Acceleration	Max 18,000m Max 515m/s Less than 4g
Antenna Specifications	OutlineDimension Center Frequency Bandwidth Impedance Axial Ratio Polarization	18.2 x 18.2 x 4.0 mm 1575 ± 3 MHz 10 MHz min 50 Ω 3 dB max RHCP
Mechanical requirements	Dimension Weight	30mm x20mm x 11.4mm 9g
Power consumption	VCC Current	5V ±5% 55mA(typical)
Environment	Operating temperature Storage temperature Humidity	40 ~ +85 (w/o backup battery) 0 ~ +125

 

Arduino Code:

/*
 RXD Arduino Pin 3
 TXD Arduino Pin 2
 RST Leave Open ? (Connect to a N/O momentary switch pulled low to reset?)
 NC Leave Open
 GND Ground
 VCC +5
 Make sure you download TinyGPS.h
 */

#include <TinyGPS.h>
#include <SoftwareSerial.h>

unsigned long fix_age;

SoftwareSerial GPS(2,3);
TinyGPS gps;
void gpsdump(TinyGPS &gps);
bool feedgps();
void getGPS();
long lat, lon;
float LAT, LON;

void setup(){
  GPS.begin(9600);
  Serial.begin(115200);
}

void loop(){
  long lat, lon;
  unsigned long fix_age, time, date, speed, course;
  unsigned long chars;
  unsigned short sentences, failed_checksum;

  // retrieves +/- lat/long in 100000ths of a degree
  gps.get_position(&lat, &lon, &fix_age);

  getGPS();
  Serial.print("Latitude : ");
  Serial.print(LAT/100000,7);
  Serial.print(" :: Longitude : ");
  Serial.println(LON/100000,7);
}

void getGPS(){
  bool newdata = false;
  unsigned long start = millis();
  // Every 1 seconds we print an update
  while (millis() - start < 1000)
  {
    if (feedgps ()){
      newdata = true;
    }
  }
  if (newdata)
  {
    gpsdump(gps);
  }
}

bool feedgps(){
  while (GPS.available())
  {
    if (gps.encode(GPS.read()))
      return true;
  }
  return 0;
}

void gpsdump(TinyGPS &gps)
{
  //byte month, day, hour, minute, second, hundredths;
  gps.get_position(&lat, &lon);
  LAT = lat;
  LON = lon;
  {
    feedgps(); // If we don't feed the gps during this long routine, we may drop characters and get checksum errors
  }
}

(Writted by Warren)

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