diff --git a/switch_mode.py b/switch_mode.py
new file mode 100644
index 0000000..fdb16c2
--- /dev/null
+++ b/switch_mode.py
@@ -0,0 +1,44 @@
+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()