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IN STOCK Order · 19.90 €
SFP-TO-TTL V1.3

SFP-to-TTL v1.3 adapter : GPON SFP serial console, no soldering

Breaks out a GPON SFP module's 20 pins so you can reach the serial console and flash firmware. No soldering.

PRICE19.90 €
RATING4.9 / 5
SHIPSWorldwide, tracked
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01 · ANATOMY

Every pin, where the docs say it is.

Each row is marked with the MSA number it starts at, 1 for one and 11 for the other, the same numbering hack-gpon.org, the pinout tables and the forum threads use. Start at the mark, count along.

Two rows of 2 × 10 bring every one of the 20 pins out twice: one side stays wired while the other is free. Bridge two points, share a ground, tap a signal without unplugging anything.

02 · INSERTION

Slide the module in. That's the install.

A real SFP cage, not pogo-pins and not a soldering iron. Push the stick home, wire four Dupont cables to a 3.3 V USB-TTL adapter, power it from VCC/GND.

  • MA5671A · V2801F · WAS-110 · RTL960x · GPON-SFP-ONT-MAC-I …
  • Console on SFP pins 2 & 7 on most sticks, some differ: 3 & 6 on the Nokia G-010S-A
  • Two on-board capacitors steady the supply from cheap USB-TTL adapters
03 · CONSOLE

Bootloader prompt in one keystroke.

screen /dev/ttyUSB0 115200

      

      

        
FLASHOpenWrt, Carlito, stock firmware

        
READBootloader logs, U-Boot env

        
WRITESerial number, GPON SN, MAC

      

    

  


  

    

      04 · SPEC
      
What's in the envelope.

      
Packed to travel: the board goes out in foam and bubble wrap, inside a tracked letter, so it arrives exactly as it left the bench.

    

    

      
        
        Photograph of the SFP-to-TTL v1.3 adapter, front and back: white PCB with two 2 × 10 2.54 mm headers, an SFP module connector, and the GET STARTED QR code on the reverse
      
      
v1.3, front and back · 41.25 × 22.5 mm

    


    

      
VERSION
v1.3, whiteIn production since 14 Sep 2026

      
EXPOSED PINS
2 × 10 @ 2.54 mmUART, I²C, GPIO : all 20 SFP pins

      
SILKSCREEN
MSA numberingEach row marked with the number it starts at, VCC and GND called out

      
POWER
3.3 VFrom your USB-TTL adapter or an external supply

      
QUICK START
QR on the backScan it, the setup guide travels with the board

      
DIMENSIONS
41.25 × 22.5 mmEach board tested by hand before shipping

    

  


  

    

      05 · FIELD REPORTS
      
Order after order, the same sentence: it worked.

    


    

      
★★★★★

      
4.9 / 5average, from buyer reviews

      
MA5671A · V2801F · XGS-ONU-25-20NI …modules brought back by buyers

    


    

      

        
I managed to unbrick my XGS-ONU-25-20NI module. After long hours of tinkering and diagnostics, I finally got it working again. What a relief, thank you so much!

        
KevinXGS-ONU-25-20NI · unbricked

      

      

        
Everything worked well with the adapter. Flashing and console access on my Huawei MA5671A worked flawlessly on the first try. Thanks for your work!

        
AndreasMA5671A · flashed first try

      

      

        
I ordered the SFP-to-TTL adapter and I highly recommend it. Shipped quickly and well packaged. I managed to unbrick 2 SFP modules ;D

        
mikegleasonjr2 modules · unbricked

      

      

        
Successfully resurrected my bricked stick without having to do any soldering. Thanks for your help!

        
Vasilbricked stick · recovered

      

      

        
I finally got my SFP module working after trying several different firmwares for the (clone) Huawei module I bought. The adapter helped a lot, received in good order.

        
MisjaHuawei clone · working

      

      

        
I wanted to let you know that the package has arrived safely! The SFP-to-TTL boards are working perfectly. Thanks again for all your help!

        
Catrieldelivered · working

      

    

  


  

    

      06 · FAQ
      
What people ask before ordering.

    

    

      

        
How do I order?

        
Pick your country, the shipping is calculated for you, then pay with PayPal, no account needed. Once payment is received the board ships with a tracking number, usually the next working day.

      

      

        
How much is shipping and handling?

        
Every board is tested, packed in foam bubble wrap and sent as a tracked letter. Orders ship from France with La Poste, or with Happy Post for destinations La Poste no longer covers. Customs handling is included where the destination requires it; any import duties billed on arrival are still yours to pay.

      

      

        
What else do I need?

        
A 3.3 V USB-TTL adapter, four female-to-female Dupont cables, a USB cable, a compatible GPON SFP/ONU module (FS.com GPON-SFP-ONT-MAC-I, Huawei MA5671A…) and a serial console app : screen, PuTTY or minicom.

      

      

        
My module keeps rebooting

        
It is usually a power-supply issue with your USB-TTL adapter. Version 1.1 relied entirely on the quality of yours; version 1.2 and later carry two capacitors that steady the supply. If the stick still reboots, it is drawing more than your adapter can give.

      

      

        
Can I return it?

        
Yes, within 14 days of delivery. Reply to your PayPal receipt with your order number, then post the board back unused; return shipping is at your expense. Once it arrives I refund the board and the original shipping cost through PayPal, within 14 days.

      

      

        
Which modules does it work with?

        
Any SFP/ONU stick with the standard 20-pin connector: MA5671A, V-SOL V2801F, WAS-110, the Realtek RTL960x family, FS.com GPON and XGS-PON sticks. The console sits on pins 2 and 7 on most of them, but not all : the Nokia G-010S-A uses 3 and 6, so look your model up in the pinout guide before wiring.

      

    

  


  

    

      

        ORDER
        
SFP-to-TTL v1.3

        
Small-batch, assembled and individually tested in France. Shipping is calculated for your country and always tracked.

      


      
      

      
      
★★★★★ 4.9 / 5 · ships from France · tracked · no account needed