Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Water flow and pressure Sensor

lafleur last edited by lafleur
WaterMeter-MS-3.0i-RFM95

Data from the MySensor node to MQTT-gateway to MQTT to Telegraf to InFluxdb to Grafana.
Controller function via NODE.RED connected via MQTT.

It measures water flow from a Dwyer WMT2 water meter in pulse per gallon.

Used a 0 to 100PSI pressure sensor (from ebay), via an analog port.

Support MCP9800 or Si7021 (humidity also) for air temp.

Two relay outputs

3 Analog inputs

MAX6816 or analog filter for contact de-bouncing for water meter

Powered via an 8 to 28v AC or DC external power source

(Board is designed to fit in a Hammond 1554 case)

Processor is a Moteino R4 LoRa with a RFM95

Sends:
- Gal per minutes
- Gal per hour
- Gal per day
- Gal of current flow
- Total gallons
- Air Temperature
- Humidity
- Water pressure
- Excessive Flow Message
https://www.dwyer-inst.com/Product/Flow/WaterMeters/SeriesWMT2

https://lowpowerlab.com/shop/product/99

design file are located at:
```
https://github.com/trlafleur/WaterMeter-MS-3.0i-RFM95
```
Reply Quote 2
1 Reply Last reply

1
Posts

2101
Views

Suggested Topics

Welcome
Announcements • • hek

8

0
Votes

8
Posts

3221
Views

@NotYetRated Hope you'll find good uses and a fun time while building your sensors.
A low cost energy meter
My Project • • OldSurferDude

7

1
Votes

7
Posts

44
Views

@OldSurferDude yes, you are correct. this sensor is capable of 50A continuous, which safely I would make it working at 40A max., but for such an important load as in your case I would go for a beefier one, like the ACS75x, 77x, but at this point I would also change the node's form factor for space and insulation reasons. On my application on the RV I have a max. curr. of 13A running on a AWG14-16 cable (European rules for RVs), so I did not ask myself too many questions beside, of course, safety. About the signal, it will be a sinusoidal signal swinging around Vcc/2. Vcc can be easily measured internally on the ATmega328. On all my DC sensors I measure Vcc at every loop, just before measuring the ADCs. Honestly, when the space is not an issue like in my RV, I would rather use a ring core current transformer, and I would get rid of noise, response time, power dissipation, but over all no need to cut any cable. Long story short, it has been a nice experiment and I used it for 6 months, and then I switched back to my RF-NANO based RS485-Modbus - Mysensors bridge connected to an off-the shelf power analyzer. Just for fun I attach a pic of my 12Vdc sensors installed on my RV. Forgive me for the spaghetti wiring on the right side, but this is an area that needs improvement.
Powering ESP8266 / NRF24L01 repeater through USB (improvement)
My Project • • Kokosnoot

2

2
Votes

2
Posts

35
Views

@Kokosnoot good solution. I remember the discussion in the early days of MySensors. I've powered the radio's for most of my sensors from the 3.3v regulator on the arduino board and for me that works perfect. But for my latest designs I decided to add a separate ams regulator for my radio's like the guys suggested in the beginning. Because you basically want the on board regulator to power the mcu only.
Water Meter or "How to get Home Assistant to send saved data to an Arduino"
My Project • • OldSurferDude

1

0
Votes

1
Posts

12
Views

No one has replied
Water Filtering and Sterilization and Hot Water Recirculation
My Project • • fsgraz

5

3
Votes

5
Posts

15
Views

@OldSurferDude thank you !
HVAC Controller
My Project • • Michael Link

3

1
Votes

3
Posts

28
Views

We are of like minds, Don't like the cloud based controls (that's another discussion). In my case I have a Bryant/Connex system, heat pump, variable speed fan and 4 zones. There's a lot going on: the 4 zones creates 16 profiles. The fan speed for a profile will depend on the indoor and outdoor temperature. The thermal fluid pump also has to be controlled. A profile will have an optimal air pressure, so there's a sensor there. The controller works just fine not being connected to the cloud. But I want to set the parameters remotely, Bryant/Connex can do this. I also wnat the status of the various actuators and sensors to show up in Home Assistant. The signals sent over the RS422 are proprietary. My plan was to reverse-engineer the signals. After doing this I'll have to experiment to get the right mix of air pressue, fan speed and thermal fluid flow for each profile. I'd like to do the same for my AO Smith heat pump water heater. I'd like to follow your progress. OSD

Water flow and pressure Sensor

WaterMeter-MS-3.0i-RFM95

Suggested Topics

Welcome
Announcements • • hek

A low cost energy meter
My Project • • OldSurferDude

Powering ESP8266 / NRF24L01 repeater through USB (improvement)
My Project • • Kokosnoot

Water Meter or "How to get Home Assistant to send saved data to an Arduino"
My Project • • OldSurferDude

Water Filtering and Sterilization and Hot Water Recirculation
My Project • • fsgraz

HVAC Controller
My Project • • Michael Link

0
Online

11.4k
Users

11.1k
Topics

112.7k
Posts

Water flow and pressure Sensor

WaterMeter-MS-3.0i-RFM95

Suggested Topics

Welcome Announcements • • hek

A low cost energy meter My Project • • OldSurferDude

Powering ESP8266 / NRF24L01 repeater through USB (improvement) My Project • • Kokosnoot

Water Meter or "How to get Home Assistant to send saved data to an Arduino" My Project • • OldSurferDude

Water Filtering and Sterilization and Hot Water Recirculation My Project • • fsgraz

HVAC Controller My Project • • Michael Link

0Online

11.4kUsers

11.1kTopics

112.7kPosts

Welcome
Announcements • • hek

A low cost energy meter
My Project • • OldSurferDude

Powering ESP8266 / NRF24L01 repeater through USB (improvement)
My Project • • Kokosnoot

Water Meter or "How to get Home Assistant to send saved data to an Arduino"
My Project • • OldSurferDude

Water Filtering and Sterilization and Hot Water Recirculation
My Project • • fsgraz

HVAC Controller
My Project • • Michael Link

0
Online

11.4k
Users

11.1k
Topics

112.7k
Posts