resetgem

#!/usr/bin/python3

import serial
import time
import sys
from datetime import datetime, timezone

# Configure the serial port
ser = serial.Serial(
    port=sys.argv[1],
    baudrate=115200,
    timeout=0
)

# Function to send data
def send_data(data):
    ser.write(data.encode())
    print(f"Sent [{len(data)}]: {data}")

# Function to read data
def read_data(min=None):
    crlf = False
    data = b''
    data_l = 0
    while not crlf:
        while ser.in_waiting > 0:
            line_data = ser.read(ser.in_waiting)
            line_data_l = len(line_data)
            assert (line_data_l != 0), "Expected data to be read with ser.in_waiting > 0"
            data += line_data   
            data_l += line_data_l
        if (min is not None) and (data_l >= min):
            break
        crlf = (data[-2:] == b'\r\n')
        if not crlf:
            time.sleep(0.1)
    return data.decode('utf-8')

# Main loop
try:
    # Turn off real-time packets for the duration
    send_data('^^^SYSOFF')
    data = read_data(min=3)
    print(f"Received [{len(data)}]: {data!r}")

    # Set the GEM to use "BIN48-NET-TIME" (4)
    send_data('^^^SYSPKT04')
    data = read_data()
    print(f"Received [{len(data)}]: {data!r}")

    # Reset the counters
    send_data('^^^SYSRSTH')
    data = read_data(min=4)
    print(f"Received [{len(data)}]: {data!r}")
    send_data('^^^SYSRSTP')
    data = read_data(min=4)
    print(f"Received [{len(data)}]: {data!r}")
    send_data('^^^SYSRSTA')
    data = read_data(min=4)
    print(f"Received [{len(data)}]: {data!r}")
    send_data('^^^SYSRSTS')
    data = read_data(min=4)
    print(f"Received [{len(data)}]: {data!r}")

    ct = datetime.now(timezone.utc)
    time_s = ct.strftime("%y,%m,%d,%H,%M,%S")

    send_data(f"^^^SYSDTM{time_s}\r")
    data = read_data(min=3)
    print(f"Received [{len(data)}]: {data!r}")

    send_data('^^^SYS_ON')
    data = read_data(min=3)
    print(f"Received [{len(data)}]: {data!r}")
finally:
    # Close the serial port
    ser.close()
    print("Serial port closed.")