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PiHat SFP "encoder"

cheap access to SFP eeprom and DOM data from a raspberry Pi

pcdwarfPcDwarf
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12.7k views
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this project is a small PCB "piHat" design to interface the I2C bus of SFP and SFP+ modules with a raspberry Pi.
Basic I2C tools from raspbian will permit to read or write the eeprom data

(Please note that this project is NOT fiber optic network interface. just a cheap way to edit the internal data of the optic module)

This project is inspired from this

http://eoinpk.blogspot.fr/2014/05/raspberry-pi-and-programming-eeproms-on.html

Some basic software is available from this site.

sfpflashV3.tar.gz

PCB manufacturing Gerber Files

force-download - 7.88 kB - 05/04/2017 at 12:28

Download

specification-SFP.pdf

lots of technical data about SFP and the eeprom content.

octetstream - 946.21 kB - 05/03/2017 at 23:29

Preview
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  • 3 × 10K Resistor SMD 1206 case
  • 1 × SFP cage and connector RS Components order code 896-7469 and 896-7471
  • 1 × 100nF Capacitor SMD 1206 case
  • 1 × 40pin 2lines 2.54" female header. exemple RS Components order code 254-6182
  • 1 × 60x30mm double layer PCB Can be manufactured from the plans but I still have some PCB available.

View project log

  • 1
    Step 1

    One hole of the metal cage is misplaced.

    You just have to cut or bend this pin and it will be ok.

View all instructions

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Discussions

Matthew Nielsen wrote 05/05/2022 at 22:46 • point

I hope you don't mind, I've uploaded your Gerber files to a git repo and renamed them so they are usable with online fabs such as OshPark: https://github.com/xunker/pihat_sfp_encoder_gerbers . I didn't see any licensing information here, and if you would like me to remove the repo I am happy to.

  Are you sure? yes | no

PcDwarf wrote 05/09/2022 at 15:11 • point

no problem, this is a free design.

consider its licence to be Creative Commons CC-BY

  Are you sure? yes | no

Joe wrote 07/15/2021 at 07:04 • point

Do you know if by reading the information of the SFF GPON transceiver I can obtain the distance traveled by the fiber? to detect faults? 

  Are you sure? yes | no

PcDwarf wrote 05/09/2022 at 15:13 • point

as far as i know, no it can't, but maybe some SFP will have proprietary extension allowing it.

  Are you sure? yes | no

jgarland wrote 08/29/2017 at 18:22 • point

I used your code to read the data from the SFF GPON transceiver module in the Adtran device that my phone company uses to terminate my gigabit internet service. I cracked open the Adtran TA-324 and soldered on a header for the I2C interface and plugged my raspberry pi into it. https://paste.ubuntu.com/25424322/

  Are you sure? yes | no

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