Watt Eye has a simple purpose - monitor pulses that comes from the home electric meter, measure the interval between the pulses and compute the real-time energy being consumed, broadcast that onto the network using UDP packets so that CouchCalendar has something to do and display, and publish the data to a web server, where it can be used (graphed or placed into a db).
Dependencies: IniManager mbed HTTPClient SWUpdate StatisticQueue mbed-rtos NTPClient Watchdog SW_HTTPServer EthernetInterface TimeInterface
Features:
- Reads the time between pulses (which the home electric meter emits as IR for each Watt consumed).
- Once every 5 seconds, it broadcasts this via UDP to the network, so other nodes can listen to this real-time data.
- Once every 5 minutes, it posts statistics to a web server for logging.
- Once a day, it checks the web server to see if there is a SW update (and if so it downloads, installs, and activates it).
- It syncs to a configured NTP server, but doesn't actually use this information for anything.
- It hosts a web server, but this is not being used at this time.
So, this is a rather expensive piece of hardware to monitor a single pulse, and yet it is easy to imagine enhancing this:
- Read the water meter in a similar manner.
- Read the gas meter in a similar manner.
And even then, there will be many left-over port pins for other uses.
Diff: main.cpp
- Revision:
- 2:649d91b93824
- Parent:
- 1:04ab0a3d07f1
- Child:
- 3:5c3ba12d155b
--- a/main.cpp Sun Jul 27 17:47:58 2014 +0000 +++ b/main.cpp Mon Jan 18 21:30:15 2016 +0000 @@ -359,7 +359,7 @@ timeFor5m = timenow; if ((timenow - timeFor5m) >= 60) { // 300) { - pc.printf(" tnow: %d, t5m: %d\r\n", timenow, timeFor5m); + //pc.printf(" tnow: %d, t5m: %d\r\n", timenow, timeFor5m); sendToWeb = true; timeFor5s = timeFor5m = timenow; stats5s.EnterItem(iKW); @@ -367,12 +367,13 @@ TransmitEnergy(true, iKW, stats5s.Min(), stats5s.Average(), stats5s.Max(), stats5m.Min(), stats5m.Average(), stats5m.Max()); } else if ((timenow - timeFor5s) >= 5) { + sendToWeb = true; timeFor5s = timenow; stats5s.EnterItem(iKW); TransmitEnergy(false, iKW, stats5s.Min(), stats5s.Average(), stats5s.Max(), stats5m.Min(), stats5m.Average(), stats5m.Max()); } - if (count != lastCount) { + if (sendToWeb) { // count != lastCount) { lastCount = count; pc.printf("%8.3fs => %4.3f (%4.3f,%4.3f,%4.3f) iKW, (%4.3f,%4.3f,%4.3f) KW 5m\r\n", (float)elapsed/1000000,