Esp32 gnss

Introduction

Global Navinagation Network Systems

• GPS (USA),
• GLONASS (Russia)
• BDS (Beidou) (China)
• Galileo (Europe)

GPS based:

• Japan's Quasi-Zenith Satellite System (QZSS)
• India's GAGAN
• European EGNOS

NMEA 0183 standard

See https://aprs.gids.nl/nmea/

Comma-delimited text format consists of rows of data.

Examples

• $GPBOD – Bearing, origin to destination
• $GPBWC – Bearing and distance to waypoint, great circle
• $GPGGA – Global Positioning System Fix Data
• $GPGLL – Geographic position, latitude / longitude
• $GPGSA – GPS DOP and active satellites
• $GPGSV – GPS Satellites in view
• $GPHDT – Heading, True
• $GPR00 – List of waypoints in currently active route
• $GPRMA – Recommended minimum specific Loran-C data
• $GPRMB – Recommended minimum navigation info
• $GPRMC – Recommended minimum specific GPS/Transit data
• $GPRTE – Routes
• $GPTRF – Transit Fix Data
• $GPSTN – Multiple Data ID
• $GPVBW – Dual Ground / Water Speed
• $GPVTG – Track made good and ground speed
• $GPWPL – Waypoint location
• $GPXTE – Cross-track error, Measured
• $GPZDA – Date & Time

GPS Libraries

SoftwareSerial because the Serial port is used by USB.

TinyGPS

TinyGPS++

Basic GPS Module Operation – Beitian 180 & 220 with Arduino

Beitian 180 & 220

Beitian

Specs

Beitian BN-180 GPS includes

• GPS antenna,
• GNSS antenna,
• RTK antenna,
• Beisan RDSS antenna,
• GPS module,
• GNSS module, board,
• GNSS receiver,
• Beidou module.

Size 18*18*6.2mm

Pins (from left to right)

1. GND (black)
2. TX output (white)
3. RX input (yellow)
4. VCC 3.6 V - 5.5 V (red)

LEDs

1. TX LED: blue. The data output, TX LED flashing
2. PPS LED: red. PPS LED not bright when GPS not fixed, flashing when fixed.