I did something similar many years ago, except I built the entire module using a few screws as contact probes. Advantage of doing ESP32 is that you can multiple probe lines to cover all of your water areas in the kitchen off of one module (e.g. under refrigerator if it has a waterline, under the sink, under the dishwasher).
Very nice! I love the sensor circuit it so simple. Just run it to an alarm horn and call it done! 😄 But I think I would make it one-shot in HA. If it senses any water, you don't want the alarm to stop until you say so. 1. What happens when the power goes out? Your HA setup likely has backup power, but this sensor does not. Power outages often happen during severe storms; useful to keep it powered if it's used in, say, a basement. 2. How long will it work if it drowns? That's another reason to make the alarm in HA one-shot.
Yeah, I agree. This was just getting thing built and verified. It would definitely make sense to have a one way flag get tripped (and an alarm get sent) if it ever triggers.
I'm hoping to make something like this, but since I pulled ethernet to all my leak detection spots, I'll most likely try to have some form of POE so that I can get both power and a more reliable network connection.
I would presume that anything you run off POE will also need a low voltage regulator to run the end device. This is just a detection circuit to go to the MCU, so a POE based unit would likely still be able to use it, so long as you run it off the power supply/regulator the MCU is using. Most boards will have a 3.3V pin on them, regardless of how they are powered.
I made one on a protoboard that works great, so I designed a PCB and ordered a few for myself to make extras. I'll post the board design on github once I've had a chance to validate it. Thanks for sharing your research on the circuit design. I also bought a "water leak cable sensor" wire from Amazon for the sensor. It is just wire with an open plastic weave instead of insulation, so it wicks water up to the wire. The one that I got is 5' long and was easy to cut into smaller sections. This allows the esp32 to be mounted on the wall (away from a potential leak) and to cover a longer leak zone.
I did something similar many years ago, except I built the entire module using a few screws as contact probes. Advantage of doing ESP32 is that you can multiple probe lines to cover all of your water areas in the kitchen off of one module (e.g. under refrigerator if it has a waterline, under the sink, under the dishwasher).
Very nice! I love the sensor circuit it so simple. Just run it to an alarm horn and call it done! 😄
But I think I would make it one-shot in HA. If it senses any water, you don't want the alarm to stop until you say so.
1. What happens when the power goes out? Your HA setup likely has backup power, but this sensor does not. Power outages often happen during severe storms; useful to keep it powered if it's used in, say, a basement. 2. How long will it work if it drowns? That's another reason to make the alarm in HA one-shot.
Yeah, I agree. This was just getting thing built and verified. It would definitely make sense to have a one way flag get tripped (and an alarm get sent) if it ever triggers.
I will need around 10, count me in.
Love it! Please make the PCBs! Thanks for sharing your efforts.
Interesting video. Thanks, I'd be interested in some PCBs.
is there any password leak sensor for esphome?
I'm hoping to make something like this, but since I pulled ethernet to all my leak detection spots, I'll most likely try to have some form of POE so that I can get both power and a more reliable network connection.
I would presume that anything you run off POE will also need a low voltage regulator to run the end device. This is just a detection circuit to go to the MCU, so a POE based unit would likely still be able to use it, so long as you run it off the power supply/regulator the MCU is using. Most boards will have a 3.3V pin on them, regardless of how they are powered.
Depending on price, i may be interested. Note i'm living in Canada.
I’d buy a 5 pack of PCBs. This is timely, I was just looking at how to make one of these.
I made one on a protoboard that works great, so I designed a PCB and ordered a few for myself to make extras. I'll post the board design on github once I've had a chance to validate it. Thanks for sharing your research on the circuit design.
I also bought a "water leak cable sensor" wire from Amazon for the sensor. It is just wire with an open plastic weave instead of insulation, so it wicks water up to the wire. The one that I got is 5' long and was easy to cut into smaller sections. This allows the esp32 to be mounted on the wall (away from a potential leak) and to cover a longer leak zone.
What box is this? Standard box mass produced or a printed one?
It's just a quick 3D print.
Count me in…