# Cathodic Protection - Adding Voltage to Telemetry Overlay **URL:** \ **Category:** QGroundControl\ **Created:** [October 30, 2021, 8:48pm UTC](https://discuss.bluerobotics.com/t/cathodic-protection-adding-voltage-to-telemetry-overlay/10927 "2021-10-30T20:48:43Z")\ **Posts on this page:** 1\ **Showing post:** 9
**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:** [November 10, 2021, 12:11am UTC](https://discuss.bluerobotics.com/t/cathodic-protection-adding-voltage-to-telemetry-overlay/10927/9 "2021-11-10T00:11:31Z")
> [@VMartini](#): > > I used a 16bit ADC (ADS1115) I2C on RPI as an upgrade Cool! 🙂 > [@VMartini](#): > > great [tutorial](https://discuss.bluerobotics.com/t/adding-a-sensor-to-mavlink-stream/7985/22), by the way Thanks! > [@VMartini](#): > > One thought that comes to me is if it’s possible to have the value on MAVLink REST API… Mavlink2rest can communicate both ways, but at the moment it only displays what it receives from the autopilot. I just had a meeting with the software team and brought this up, and they agreed it would be useful to also capture and display messages it receives from clients (for this kind of thing, and several other purposes), so it’s something we’ll try to make possible. That said, Companion 0 is only receiving critical updates at this point, so I expect the feature will only end up in Companion 1 (which is [currently available in Beta](https://discuss.bluerobotics.com/t/companion-1-0-beta-testing/10830)). --- _[View the full topic](https://discuss.bluerobotics.com/t/cathodic-protection-adding-voltage-to-telemetry-overlay/10927)._