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At Yimelo, we have long been a fan of system on chip (SOC) systems for embedded applications. We recently had an opportunity to provide an instrument what is perhaps the most well known of the SOC systems; a raspberry pi to gather and transmit data.<\/p>\n
We are no stranger to the Raspberry pi, and have used them for many applications with keen interest since they arrived on the market as a rather low power single core system.<\/p>\n
Our project resides in a hospital on Melbourne’s Mornington peninsula, and provides an interface between water meters to allow for a real time water map that calculates the flows from and to multiple sources, including the amount of top-up water drawn from the mains supply to deliver a net interval recycled water measurement in 15 minute intervals.<\/p>\n
Each input is monitored through a software thread, with interrupt based pulse logging provided via voltage free contact reed switched in water meters.<\/p>\n
The system has been successfully used to provide reliable data feeds to a third party who were selected through a recent building program to display data.<\/p>\n
The system has proven to be very cost effective and reliable, with minimal reliance on the SD card through the age old method of “ram-drive”. We have successfully configured the pi to use the SD for boot only, with a more robust SSD external drive something we see as a possible improvement for the raspberry system in future.<\/p>\n
One of the four meters that forms the system boundary measurement devices connected to the raspberry![\"\"](\"https:\/\/yimelo.com.au\/wp-content\/uploads\/2017\/10\/WP_20160311_001-e1508233442162-300x137.jpeg\")
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