wraggster
March 25th, 2014, 01:44
http://hackadaycom.files.wordpress.com/2014/03/custom_sensor_1.jpg?w=453&h=450 (http://hackadaycom.files.wordpress.com/2014/03/custom_sensor_1.jpg)
[Sven337] just blogged about a gas consumption monitoring setup (http://perso.aquilenet.fr/~sven337/english/2014/03/18/Gas-meter-monitoring-wireless-battery-arduino.html) he finished not long ago. As his gas meter was located outside his apartment and nowhere near any electrical outlet, a battery-powered platform that could wirelessly send the current consumption data to his Raspberry Pi was required. His final solution therefore consists of a JeeNode (http://jeelabs.net/projects/hardware/wiki/JeeNode) coupled with the well known nRF24L01+ wireless transmitter, powered by 3 supposedly dead alkaline batteries.
[Sven337] carefully looked at the different techniques available to read the data from his meter. At first he had thought of using a reflective sensor to detect the number 6 which (in France at least) is designed to reflect light very well. He then finally settled for a magnetic based solution, as the Actaris G4 gas meter has a small depression intended for magnetic sensors. The PCB you see in the picture above therefore has a reed sensor and a debug LED. The four wires go to a plastic enclosure containing the JeeNode, a couple of LEDs and a reset switch. Using another nRF24L01, the Raspberry Pi finally receives the pulse count and reports it to an eeePC which takes care of the storage and graphing.
http://hackaday.com/2014/03/23/monitoring-your-gas-consumption-with-a-jeenode-and-a-nrf24l01/
[Sven337] just blogged about a gas consumption monitoring setup (http://perso.aquilenet.fr/~sven337/english/2014/03/18/Gas-meter-monitoring-wireless-battery-arduino.html) he finished not long ago. As his gas meter was located outside his apartment and nowhere near any electrical outlet, a battery-powered platform that could wirelessly send the current consumption data to his Raspberry Pi was required. His final solution therefore consists of a JeeNode (http://jeelabs.net/projects/hardware/wiki/JeeNode) coupled with the well known nRF24L01+ wireless transmitter, powered by 3 supposedly dead alkaline batteries.
[Sven337] carefully looked at the different techniques available to read the data from his meter. At first he had thought of using a reflective sensor to detect the number 6 which (in France at least) is designed to reflect light very well. He then finally settled for a magnetic based solution, as the Actaris G4 gas meter has a small depression intended for magnetic sensors. The PCB you see in the picture above therefore has a reed sensor and a debug LED. The four wires go to a plastic enclosure containing the JeeNode, a couple of LEDs and a reset switch. Using another nRF24L01, the Raspberry Pi finally receives the pulse count and reports it to an eeePC which takes care of the storage and graphing.
http://hackaday.com/2014/03/23/monitoring-your-gas-consumption-with-a-jeenode-and-a-nrf24l01/