# Node-RED for controlling Underwater ROV via Mobile Phone

**URL:** <https://discourse.nodered.org/t/node-red-for-controlling-underwater-rov-via-mobile-phone/7896>\
**Category:** Share Your Projects\
**Created:** [12 February 2019 19:00 UTC](https://discourse.nodered.org/t/node-red-for-controlling-underwater-rov-via-mobile-phone/7896 "2019-02-12T19:00:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![deepsouth](https://avatars.discourse-cdn.com/v4/letter/d/53a042/32.png) [@deepsouth](https://discourse.nodered.org/u/deepsouth)\
**Post date:** [12 February 2019 19:00 UTC](https://discourse.nodered.org/t/node-red-for-controlling-underwater-rov-via-mobile-phone/7896/1 "2019-02-12T19:00:13Z")

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I am currently using Node-RED to control an underwater ROV via WiFi to a mobile phone.

The Node-RED is served up by the on-board Raspberry Pi, and networked linked via a tether with a WiFi router on the end. There are a number of tabpages providing camera and motion control, ROV monitoring, changing on-board settings and parameters, and a map of the where the ROV is. Very soon there will be one displaying a real-time echo sounder plot too. The ROV is rated to about 150m in depth, although in some configurations this might be extended to upto 300m

Using a mobile phone means that you have to optimize the screen space available, The screen can also scale up use on a tablet or PC.

Node-RED provides and awesome platform for rapid prototyping and development....

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [13 February 2019 11:57 UTC](https://discourse.nodered.org/t/node-red-for-controlling-underwater-rov-via-mobile-phone/7896/2 "2019-02-13T11:57:45Z")

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Wow ! Does WiFi work at that range under water ?

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**Author:** ![deepsouth](https://avatars.discourse-cdn.com/v4/letter/d/53a042/32.png) [@deepsouth](https://discourse.nodered.org/u/deepsouth)\
**Post date:** [14 February 2019 01:27 UTC](https://discourse.nodered.org/t/node-red-for-controlling-underwater-rov-via-mobile-phone/7896/3 "2019-02-14T01:27:09Z")

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Hi dceejay

Not quite. 🙂 Unfortunately WiFi signal does not penetrate water very well - I think its about half a meter?

In this case, the network tether is plugged into a Raspberry PI on the ROV in a water proof enclosure. The other end of the tether on the surface is plugged into a WiFi router power by a USB battery pack. The mobile phone connects to the WiFi router.