Rob Dobson / RdGasUseMonitor

Monitor for central heating system (e.g. 2zones+hw) Supports up to 15 temp probes (DS18B20/DS18S20) 3 valve monitors Gas pulse meter recording Use stand-alone or with nodeEnergyServer See http://robdobson.com/2015/09/central-heating-monitor

Dependencies:   EthernetInterfacePlusHostname NTPClient Onewire RdWebServer SDFileSystem-RTOS mbed-rtos mbed-src

GasUseCounter.cpp@5:5bccf48799d4, 2015-02-17 (annotated)

Committer:
Bobty
Date:
Tue Feb 17 21:33:39 2015 +0000
Revision:
5:5bccf48799d4
Child:
19:0367cb46d003
Tidied up - but is unstable - web server crashes after some time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bobty 5:5bccf48799d4 1 #include "GasUseCounter.h"
Bobty 5:5bccf48799d4 2
Bobty 5:5bccf48799d4 3 // Callback from web server to handle getting current gas count
Bobty 5:5bccf48799d4 4 char* GasUseCounter::getGasUseCallback(char* cmdStr, char* argStr)
Bobty 5:5bccf48799d4 5 {
Bobty 5:5bccf48799d4 6 sprintf(_gasCountStr, "{\"gasUseCount\":\"%d\"}", GetCount());
Bobty 5:5bccf48799d4 7 return _gasCountStr;
Bobty 5:5bccf48799d4 8 }
Bobty 5:5bccf48799d4 9
Bobty 5:5bccf48799d4 10 // Init
Bobty 5:5bccf48799d4 11 void GasUseCounter::Init()
Bobty 5:5bccf48799d4 12 {
Bobty 5:5bccf48799d4 13 GetGasCountFromSD();
Bobty 5:5bccf48799d4 14 }
Bobty 5:5bccf48799d4 15
Bobty 5:5bccf48799d4 16 // Service function
Bobty 5:5bccf48799d4 17 bool GasUseCounter::Service()
Bobty 5:5bccf48799d4 18 {
Bobty 5:5bccf48799d4 19 // Check for an edge
Bobty 5:5bccf48799d4 20 bool edgeDetected = _pulseDetector->Service();
Bobty 5:5bccf48799d4 21 if (edgeDetected)
Bobty 5:5bccf48799d4 22 {
Bobty 5:5bccf48799d4 23 // Check if we need to store in non-volatile storage
Bobty 5:5bccf48799d4 24 if (GetCount() >= _lastWrittenGasCount + MAX_PULSES_BEFORE_STORE_NV)
Bobty 5:5bccf48799d4 25 {
Bobty 5:5bccf48799d4 26 WriteGasCountToSD();
Bobty 5:5bccf48799d4 27 _lastWrittenGasCount = GetCount();
Bobty 5:5bccf48799d4 28 }
Bobty 5:5bccf48799d4 29
Bobty 5:5bccf48799d4 30 // Show count
Bobty 5:5bccf48799d4 31 _pc.printf("Count %d Rate(ms) %d\r\n", _pulseDetector->GetPulseCount(), _pulseDetector->GetPulseRateMs());
Bobty 5:5bccf48799d4 32 }
Bobty 5:5bccf48799d4 33 return edgeDetected;
Bobty 5:5bccf48799d4 34 }
Bobty 5:5bccf48799d4 35
Bobty 5:5bccf48799d4 36 // Get the current usage count from SD card
Bobty 5:5bccf48799d4 37 void GasUseCounter::GetGasCountFromSD()
Bobty 5:5bccf48799d4 38 {
Bobty 5:5bccf48799d4 39 FILE* fp = fopen(_gasUseFilename, "r");
Bobty 5:5bccf48799d4 40 if (fp == NULL)
Bobty 5:5bccf48799d4 41 {
Bobty 5:5bccf48799d4 42 _pc.printf ("Read Gas ... Filename %s not found\r\n", _gasUseFilename);
Bobty 5:5bccf48799d4 43 }
Bobty 5:5bccf48799d4 44 else
Bobty 5:5bccf48799d4 45 {
Bobty 5:5bccf48799d4 46 int curCount = 0;
Bobty 5:5bccf48799d4 47 int retVal = fscanf(fp, "%d", &curCount);
Bobty 5:5bccf48799d4 48 fclose(fp);
Bobty 5:5bccf48799d4 49 if (retVal == 1)
Bobty 5:5bccf48799d4 50 _pc.printf ("Read from SD last gas count = %d\r\n", curCount);
Bobty 5:5bccf48799d4 51 else
Bobty 5:5bccf48799d4 52 _pc.printf ("Failed to read gas count from SD card\r\n");
Bobty 5:5bccf48799d4 53 _lastWrittenGasCount = curCount;
Bobty 5:5bccf48799d4 54 _pulseDetector->SetPulseCount(curCount);
Bobty 5:5bccf48799d4 55 }
Bobty 5:5bccf48799d4 56 }
Bobty 5:5bccf48799d4 57
Bobty 5:5bccf48799d4 58 void GasUseCounter::WriteGasCountToSD()
Bobty 5:5bccf48799d4 59 {
Bobty 5:5bccf48799d4 60 FILE* fp = fopen(_gasUseFilename, "w");
Bobty 5:5bccf48799d4 61 if (fp == NULL)
Bobty 5:5bccf48799d4 62 {
Bobty 5:5bccf48799d4 63 _pc.printf ("WriteGas ... Filename %s not found\r\n", _gasUseFilename);
Bobty 5:5bccf48799d4 64 }
Bobty 5:5bccf48799d4 65 else
Bobty 5:5bccf48799d4 66 {
Bobty 5:5bccf48799d4 67 fprintf(fp, "%d", GetCount());
Bobty 5:5bccf48799d4 68 _pc.printf ("Written to SD last gas count = %d\r\n", GetCount());
Bobty 5:5bccf48799d4 69 fclose(fp);
Bobty 5:5bccf48799d4 70 }
Bobty 5:5bccf48799d4 71 }