raspberrypipico_gps__neo6m_main.py

import utime as time
from machine import UART,Pin

gps_module = UART(1, baudrate=9600, tx=Pin(4), rx=Pin(5))
time_zone = -7

def read_until_char(uart, target_char='$'):
    received_data = b''  # Initialize an empty byte string to store received data
    while True:
        if uart.any():  # Check if there's data available to read
            char = uart.read(1)  # Read one byte (character) from UART
            received_data += char  # Append the character to the received_data
            if char == target_char.encode():  # Check if the character matches the target character
                break  # Stop reading if the target character is found
    return received_data
 
def normalize_gps_data(byte_data):
    return '$' + (byte_data[:-1] ).decode('ascii').rstrip()

while True:
    time.sleep_ms(100)
    data = normalize_gps_data(read_until_char(gps_module))
    #print(data)
    if data.startswith('$GPGGA'):
        print(data)