# Reading data from J13 - Expansion B2B connection on m500

Source: https://forum.modalai.com/topic/764/reading-data-from-j13-expansion-b2b-connection-on-m500
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2022-02-22 14:24:24 UTC by yu zhang
Replies: 2 · Views: 668

## yu zhang · 2022-02-22 14:24:24 UTC

Hi team,

Since m500 has a J13 Expansion B2B connection, I am wondering if I could plug in a general type of sensor by using the J13 and reading data in VOXL? 

I understand it should be used for USB extension board or connecting LET, but I would think to use this connector for other sensors. The J13 looks like a general 60-pin HD connector, right? So, I am thinking if it could be compatible with a sensor that has a general 60-pin connector. 

If so, can you please advise how could I read data from J13 or will it be used just like a normal one (reading data from terminal)?

![Screen Shot 2022-02-23 at 1.21.15 AM.png](https://forum.modalai.com/assets/uploads/files/1645539680114-screen-shot-2022-02-23-at-1.21.15-am.png)

## Reply by Chad Sweet (ModalAI staff) · 2022-02-22 15:57:45 UTC

J13 is the connector we use for add-on boards. There are no 3rd party sensors that plug into that port. The debug board can be used with USB for general expansion

## Reply by yu zhang · 2022-02-22 23:40:45 UTC (in reply to Chad Sweet)

@Chad-Sweet Thanks, I see. I had the debug board, but it may not be able to work for special expansion. Anyways, I will think about that.