import serial
import time

ARDUINO_PORT = '/dev/ttyACM0'
BAUD_RATE = 9600

try:
    ser = serial.Serial(ARDUINO_PORT, BAUD_RATE)
    time.sleep(2)  
except serial.SerialException as e:
    print(f"Error : fail to open serial port {ARDUINO_PORT}: {e}")
    exit()

epoch = int(time.time()) 

commande_rtc = f"T{epoch}\n"

ser.write(commande_rtc.encode()) 

ser.close()

print(f"Cmd send : {commande_rtc.strip()}")
print(f"Epoch send: {epoch}")