import serial
import time
import glob
import binascii

# Gridseed Befehle (Hex Strings)
# Scrypt Reset: 55AA1F2816000000 + 55AA1F2817000000
# SHA256 Reset (Vermutung/Standard): 55AA1F2800000000
# Init: 55AAC000C0C0C0C00500000001000000

CMD_SHA_RESET = "55AA1F2800000000"

def send_command(port, hex_cmd):
    try:
        ser = serial.Serial(port, 115200, timeout=1)
        cmd_bytes = binascii.unhexlify(hex_cmd)
        print(f"Sending to {port}: {hex_cmd}")
        ser.write(cmd_bytes)
        time.sleep(0.1)
        ser.close()
        return True
    except Exception as e:
        print(f"Error on {port}: {e}")
        return False

def main():
    print("=== Gridseed Mode Switcher (SHA256) ===")
    
    # Suche Gridseeds (meist ttyACM*)
    ports = glob.glob('/dev/ttyACM*')
    if not ports:
        print("Keine Gridseeds gefunden (/dev/ttyACM*)")
        return

    print(f"Gefundene Geräte: {ports}")

    for port in ports:
        # Sende SHA Reset
        send_command(port, CMD_SHA_RESET)
        
    print("Fertig. Starte Miner neu und prüfe Hashrate.")

if __name__ == "__main__":
    main()