Wireless Water Meter
We have built a prototype for a wireless water meter using an off the shelf water flow sensor and the WSN1101L. The flow sensor generates pulses where each pulse corresponds to around 5 mL. The pulse signal is connected to the WSN1101L’s microcontroller. The latter simply counts the pulses and sends the pulse count periodically to the cloud via a WiSense gateway node. The WSN1101L is configured to operate in reduced function mode (RFD). The node is powered by a pair of AAA batteries.
The prototype has been running for around two days now. It is part of the WiSense smart community test bed in East Bangalore. We are getting some commercial flow sensors next. We are going to include wireless water meters as part of our product portfolio.
Water conservation is really important in India. Many of the states are experiencing drought conditions. In Bangalore, most communities do not have municipal water supply. They get water from tankers. Ground water is scarce in most areas. In spite of depending on water tankers, there is significant wastage of water in these communities. Connected water meters can really help in reducing wastage. Further, people want to pay for what they consume. Cost of water is already a significant part of the community maintenance budget and is only going to go up every year.
Here is a visualization of the consumption measured by our prototype over one day.
Here are some pics of the prototype in action.