# Cabling between the Ping Sonar and PC

**URL:** <https://discuss.bluerobotics.com/t/cabling-between-the-ping-sonar-and-pc/12063>\
**Category:** Ping Sonar Devices\
**Created:** [May 1, 2022, 9:07pm UTC](https://discuss.bluerobotics.com/t/cabling-between-the-ping-sonar-and-pc/12063 "2022-05-01T21:07:26Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\
**Post date:** [May 6, 2022, 3:36pm UTC](https://discuss.bluerobotics.com/t/cabling-between-the-ping-sonar-and-pc/12063/7 "2022-05-06T15:36:51Z")

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> [@Ludo41](#):
>
> Ping Sonar → Cube Black Pixhawk TELEM2 → Topside (Mission planner)  
> On my board TELEM2, it’s Serial port 2:
> 
> - [SERIAL2\_PROTOCOL] = 9 (Lidar)
> - [SERIAL2\_BAUD] = 115 (115200 baud)
> - [RNGFND1\_TYPE] = 23 (BlueRoboticsPing)

Huh, I wasn’t aware there was a direct Ping Sonar rangefinder option in ArduPilot. It’s seemingly from before I started at Blue Robotics, and doesn’t seem to be mentioned in our documentation (which is a situation we should improve/fix).

> [@Ludo41](#):
>
> Finally by feeding the sonar from the +5 volt output of my regulator and not by the serial port TELEM2 I manage to have the return of my sonar in Mission Planner.

Ok, good that you seem to have found a workaround for your issue at least 🙂

> [@Ludo41](#):
>
> Is it possible that a tiny amount of water is infiltrated and which have court-circuited the serial card port making power supply through this port impossible?

I’m not sure - do you have access to a multimeter? You could potentially probe the port without the sonar connected to see if it’s providing an output at all or if the power pin is fried/damaged.

> [@Ludo41](#):
>
> I noticed on my old sonar that the rubber resin on the sonar cable pass had come off the aluminium tube.  
> …  
> How to repair this resin?

I’d recommend you contact [support@bluerobotics.com](mailto:support@bluerobotics.com) for this - I’m not sure what we normally suggest when the epoxy on a potted penetrator has failed. If the device is still working then you may be able to clean off the electronics with some isopropyl alcohol and replace the penetrator (and possibly replace the cable too, if it’s starting to corrode), but if the PCB or the components on it are corroding then depending on the damage you may need to replace the PCB or the entire device.

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