ublox M8N GPS Firmware-Update-Problem: FLASH

Eigentlich wollte ich das GPS-Modul von Version 2.x auf 3.x updaten (um 
auch GALILEO empfangen zu können). Das Modul ist über einen 
USB-TTL-Converter mit dem PC verbunden.

Aus irgendeinem Grund funktioniert das aber nicht, da die 
FLASH-Information scheinbar nicht ankommt -" Flash Detection Time Out"

0.0 u-blox Firmware Update Tool version 21.04DEV

  0.0 Updating Firmware 
'D:\daniel\Downloads\UBX_M8_301_SPG.911f2b77b649eb90f4be14ce56717b49.bin 
'  of receiver over 'STDIO'
  0.0   - Opening and buffering image file

  0.0   - Verifying image

  0.0 Image (file size 526548) for u-blox8 accepted

  0.0 Image Ver '3.01 (107900)'

  0.0   - CRC= 0xDA9A1F55 0x714D85B7

  0.0   - Trying to open port STDIO

  0.0   - Setting baudrate to 115200

  0.3   - Received Version information

  0.3   - Receiver currently running SW '2.01 (75331)'
  0.3   - Receiver HW '00080000', Generation 8.0

  0.3   - Sending ROM CRC-Mix-Read

  0.3 ROM CRC: 0xA15AF099

  0.3 u-blox8 ROM2.01 hardware detected (0xA15AF099)
  0.3  Getting Port connection to receiver

  0.4   - Connected port is: UART1

  0.4  Starting LDR TSK

  0.5   - LDR TSK started successfully

  0.5  Identify flash loader

  0.5   - Uploader version 5.1 detected

  0.5  Stop GPS operation

  0.5  Detecting Flash manufacturer and device IDs

  1.5   - Retry poll

  2.5   - Retry poll

  3.5   - Retry poll

  3.5 ERROR: Flash Detection timed out

  3.5 Firmware Update FAILED


Firmware Update Utility has unexpectedly terminated

Exit code (2)