Thanks very much! I ordered the sensor and I will print your design Elster watermeter reader by roumen - Thingiverse
This was my initial design, I now use a proper 12V to 5V DC-DC converter as the LM1117 tends to run a bit hot and could become unreliable. I use this one: https://nl.aliexpress.com/item/1005005505236083.html
Kind regards, Roger.
@joe2 - Can you share what your hardware is at the pool pump end. What physical sensor are you using to read the GPM ?
Hi,
Can you help me out? I have implemented your design and used almost excacly the same hardware except for the ESP board (which is a esp32 C3 super mini) but for some reason i am unable to catch some readings when it’s mounted on the Elster water meter. The sensor gives a correct reading when i move it along some random metal. How dit you connect the buck converter? Did you bridge both v- in and v- out? And did you attach an extra pullup resitor between the black and brown wire of the sensor?
Thanks
Can you isolate what works and what not?
The buck converter has an enable line on the input v+ side which also needs power (just connect to V+) for it to start. Simple 12V going to the in side and connect your esp 5V on the V-out side. The V- signals are internally connected in the buck converter.
I used no other components in my setup so no pull-up resistor.
Hi,
I’ve tested some things now. For some reason i need a 2k7 resitor between 12+ and the black wire because otherwise the ESP C3 super mini wont read any pulses at all. Now the sensor works at all metal objects and magnets except when placed on the watermeter (even if mounted in the 3d printed model you’ve provided).
Hi Koen,
Strange but could be that your sensor is slightly different. I also noticed that not all these sensors are equally sensitive so could be that it reacts on metal but not on the small plate in the watermeter…