David Smart / Mbed 2 deprecated WattEye

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.

HardFaultHandlers.cpp@4:0a7567195e4b, 2019-03-02 (annotated)

Committer:
WiredHome
Date:
Sat Mar 02 23:15:49 2019 +0000
Revision:
4:0a7567195e4b
Parent:
0:a4887b672ac6 
Checkpoint publish before changes.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 0:a4887b672ac6 1 #include "mbed.h"
WiredHome 0:a4887b672ac6 2
WiredHome 0:a4887b672ac6 3
WiredHome 0:a4887b672ac6 4 // Reset_Handler
WiredHome 0:a4887b672ac6 5 // NMI_Handler
WiredHome 0:a4887b672ac6 6 // HardFault_Handler
WiredHome 0:a4887b672ac6 7 // MemManage_Handler
WiredHome 0:a4887b672ac6 8 // BusFault_Handler
WiredHome 0:a4887b672ac6 9 // UsageFault_Handler
WiredHome 0:a4887b672ac6 10 extern "C" void HardFault_Handler()
WiredHome 0:a4887b672ac6 11 {
WiredHome 0:a4887b672ac6 12 printf("Hard Fault!\r\n");
WiredHome 0:a4887b672ac6 13 wait_ms(500);
WiredHome 0:a4887b672ac6 14 NVIC_SystemReset();
WiredHome 0:a4887b672ac6 15 }
WiredHome 0:a4887b672ac6 16 extern "C" void NMI_Handler()
WiredHome 0:a4887b672ac6 17 {
WiredHome 0:a4887b672ac6 18 printf("NMI Fault!\r\n");
WiredHome 0:a4887b672ac6 19 wait_ms(500);
WiredHome 0:a4887b672ac6 20 NVIC_SystemReset();
WiredHome 0:a4887b672ac6 21 }
WiredHome 0:a4887b672ac6 22 extern "C" void MemManage_Handler()
WiredHome 0:a4887b672ac6 23 {
WiredHome 0:a4887b672ac6 24 printf("MemManage Fault!\r\n");
WiredHome 0:a4887b672ac6 25 wait_ms(500);
WiredHome 0:a4887b672ac6 26 NVIC_SystemReset();
WiredHome 0:a4887b672ac6 27 }
WiredHome 0:a4887b672ac6 28 extern "C" void BusFault_Handler()
WiredHome 0:a4887b672ac6 29 {
WiredHome 0:a4887b672ac6 30 printf("BusFault Fault!\r\n");
WiredHome 0:a4887b672ac6 31 wait_ms(500);
WiredHome 0:a4887b672ac6 32 NVIC_SystemReset();
WiredHome 0:a4887b672ac6 33 }
WiredHome 0:a4887b672ac6 34 extern "C" void UsageFault_Handler()
WiredHome 0:a4887b672ac6 35 {
WiredHome 0:a4887b672ac6 36 printf("UsageFault Fault!\r\n");
WiredHome 0:a4887b672ac6 37 wait_ms(500);
WiredHome 0:a4887b672ac6 38 NVIC_SystemReset();
WiredHome 0:a4887b672ac6 39 }