Hi. The leak sensor triggers the leak sensor board (steady red light), but never in the software, both BlueOS and QGC. If I disconnect the sensor from the board the red light goes away. None of the connectors are corroded or unclean. If I change the position of the sensor on the board it’s the same…

I did some tests today (with Pixhawk1 board). I installed firmware 4.5.6. Successful install, but parameters never loaded. Errors from BlueOS below. Reboot didn’t help. Could be a one off, but unfortunately didn’t have time to try a re-install of 4.5.6 today. [image] Next: Installed 4.5.5 and pa…

Hi @Blue2 , welcome to the forum :slight_smile: Thanks for reporting this, and sorry to hear you’re experiencing a problem with your leak sensor functionality. Would you be able to save a parameters file from the BlueOS Autopilot Parameters page, and upload it here, so we can see if there are any i…

Submarine-4.5.6-STABLE-20251127-191244.params (19.1 KB) 4.1.2 version had same results. Leak sensor board is triggering, but not in software. Everything else seem to work. I had some minor light flicker, I don’t know if that could be due to a minor water leak I had. It was through a thruster cabl…

I tested with another leak sensor board and another cable between Pixhawk and leak sensor board, same results. I tried AUX 1,4,5 and 6, same results. Leak sensor board gets power from Aux, so the Aux rail at least provides power. I ran a script on an Esp8266, and the leak sensor board triggers as …

[image] Blue2: 4.1.2 version had same results. Leak sensor board is triggering, but not in software. I’ve just tried 4.1.2 on my Pixhawk setup and the leak failsafe worked as expected. My relevant parameters were: Param Value Notes FS_LEAK_ENABLE 1: Warn Only LEAK1_PIN 55: Pixhaw…

That’s it, thank you. Servo14 as GPIO didn’t work for me in 4.5.x, but did indeed work in 4.1.2. It was probably not set as GPIO when I last tested in 4.1.x. As a temporary dirty fix I had connected the leak sensor board to the rPi (GPIO17) and written a script using pymavlink to set leak flag. It …

[image] Blue2: That’s it, thank you. Glad to hear it :slight_smile: And thanks again for raising that it wasn’t working - we’ll likely have to change some systems and processes to make sure things like that can’t go unnoticed for extended periods. [image] Blue2: Servo14 as GPIO didn’t w…

[image] Blue2: [image] If those warnings appear during a firmware installation (while there is no active autopilot available) then they’re not relevant. If they appear after the autopilot is supposed to be running then the installation may have failed, or there’s some communication issue tha…

[image] Eliot: I’m currently looking into what we can do to mitigate+fix that Progress can be tracked in this thread :slight_smile:

Leak sensor not triggering in software

Blue Robotics Software BlueOS

EliotBR (Eliot) December 15, 2025, 7:13pm 11

Progress can be tracked in this thread

Topic		Replies	Views
Leak Sensor don't work Build/Make	0	1010	September 16, 2019
⚠️ Attention Pixhawk + Leak Detector users ArduSub	1	251	December 17, 2025
Sos leak detection problem Blue Robotics Products	1	465	June 21, 2023
Pixhawk beeping and flashing led, straight out of the box Blue Robotics Software	3	1176	February 4, 2020
Leak Detector False Alarm Sensors	5	1542	January 31, 2022

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