M5Stack NEO-M8N GPS Module for ESP32 Development Kit with Internal & External Antenna MCX Interface.
GPS is build with NEO-M8N, u-blox M8 concurrent GNSS modules and come with an active Antenna.
The NEO-M8 series provides high sensitivity and minimal acquisition times while maintaining low system power.
The NEO-M8N integrates a 72-channel u-blox M8 GNSS engine that supports multiple GNSS systems ( Beidou, Galileo, GLONASS, GPS / QZSS ) and able to receive 3 GNSS systems simultaneously.
The series communicate protocol between M5Core and GPS is UART, physically connected via UART2 (GPIO16, GPIO17)
If you want to Change the uart baudrate,please check here ( u-center-just-for-Windows )
*Notice: GPS signal can only be found outdoors
Features
Operating voltage: 2.7 ~ 3.6
Operating temperature: -40 ~ 80 °C
Antenna type: built-in ceramic antenna and external antenna
external Antenna port: SMA
Can receive data from 3 GNSS systems concurrently
Horizontal position accuracy: minimum 2.5m
GPS module (NEO-M8N) Built-in Flash, so that you can upgrade firmware via u-center-just-for-Windows
Supported protocols: NMEA, UBX, RTCM
Industry leading -167dBm sensitivity
Backward compatibility with NEO‐7 and NEO‐6 series
Kit includes
1x GPS Module
1x external Antenna(cable length : 1 meter)
Application
GPS-based logistics tracking management
Driverless car positioning
Example
Arduino IDE
To the complete code GPSRaw.ino, please click here.
**Note: The GPS module needs placed outdoors to be able to receive GPS signal **
#include <M5Stack.h>
/* By default, GPS is connected with M5Core through UART2 */
HardwareSerial GPSRaw(2);
void setup() {
M5.begin();
GPSRaw.begin(9600);// GPS init
Serial.println("hello");
termInit();
}
void loop() {
// put your main code here, to run repeatedly:
if(Serial.available()) {
int ch = Serial.read();
GPSRaw.write(ch);
}
if(GPSRaw.available()) {
int ch = GPSRaw.read();// read GPS information
Serial.write(ch);
termPutchar(ch);
}
}
After burnt the example code GPSRaw.ino, m5core and PC serial terminal will display following information
Protocol Specification:
Please refer to the u-blox 8 / u-blox M8 Receiver Description - Manual, , The following table is a instruction of xxRMC message in NMEA protocol.
Usefull Link:
