The NEO-6M is a GPS module communicating via UART. It provides the current position of the device.
The NEO-6M module has four pins in total.
| NEO-6M Pin | Raspberry Pi Pin |
|---|---|
| GND | GND |
| VCC | VCC (5 V) |
| RX | TX (GPIO 14) |
| TX | RX (GPIO 15) |
The RX pin on the module can be skipped and is not needed for now.
Add the following entry to /boot/firmware/config.txt:
enable_uart=1
Remove this from /boot/firmware/cmdline.txt:
console=serial0,115200
Reboot the Pi.
Check if the module is wired correctly and sends some data:
sudo cat /dev/serial0It might return lines like this:
$GPTXT,01,01,01,NMEA unknown msg*58
If the blue LED on the module is blinking, it has already found its position and sends messages with the position. Go outside or close to a window and wait a few minutes if it does not blink.
Open a python console and test it out:
>>> import serial
>>> import io
>>> import pynmea2
>>> device = serial.Serial('/dev/serial0', baudrate=9600, timeout=0.5)
>>> io_wrapper = io.TextIOWrapper(io.BufferedRWPair(device, device))
>>> while 1:
... data = io_wrapper.readline()
... if data[0:6] == '$GPRMC':
... message = pynmea2.parse(data)
... print('lat:', message.latitude, 'lon:', message.longitude)