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@19:0367cb46d003, 2015-10-05 (annotated)

Committer:
Bobty
Date:
Mon Oct 05 14:05:33 2015 +0000
Revision:
19:0367cb46d003
Parent:
5:5bccf48799d4
Child:
20:7933076df5af
Added retries on getting addresses from thermometers; Doubled up on non-volatile storage of latest gas count

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bobty 19:0367cb46d003 1 // Gas usage based on pulses from a gas meter
Bobty 19:0367cb46d003 2 // Rob Dobson 2015
Bobty 19:0367cb46d003 3
Bobty 5:5bccf48799d4 4 #include "GasUseCounter.h"
Bobty 5:5bccf48799d4 5
Bobty 5:5bccf48799d4 6 // Callback from web server to handle getting current gas count
Bobty 5:5bccf48799d4 7 char* GasUseCounter::getGasUseCallback(char* cmdStr, char* argStr)
Bobty 5:5bccf48799d4 8 {
Bobty 5:5bccf48799d4 9 sprintf(_gasCountStr, "{\"gasUseCount\":\"%d\"}", GetCount());
Bobty 5:5bccf48799d4 10 return _gasCountStr;
Bobty 5:5bccf48799d4 11 }
Bobty 5:5bccf48799d4 12
Bobty 5:5bccf48799d4 13 // Init
Bobty 5:5bccf48799d4 14 void GasUseCounter::Init()
Bobty 5:5bccf48799d4 15 {
Bobty 5:5bccf48799d4 16 GetGasCountFromSD();
Bobty 5:5bccf48799d4 17 }
Bobty 5:5bccf48799d4 18
Bobty 5:5bccf48799d4 19 // Service function
Bobty 5:5bccf48799d4 20 bool GasUseCounter::Service()
Bobty 5:5bccf48799d4 21 {
Bobty 5:5bccf48799d4 22 // Check for an edge
Bobty 5:5bccf48799d4 23 bool edgeDetected = _pulseDetector->Service();
Bobty 5:5bccf48799d4 24 if (edgeDetected)
Bobty 5:5bccf48799d4 25 {
Bobty 5:5bccf48799d4 26 // Check if we need to store in non-volatile storage
Bobty 5:5bccf48799d4 27 if (GetCount() >= _lastWrittenGasCount + MAX_PULSES_BEFORE_STORE_NV)
Bobty 5:5bccf48799d4 28 {
Bobty 5:5bccf48799d4 29 WriteGasCountToSD();
Bobty 5:5bccf48799d4 30 _lastWrittenGasCount = GetCount();
Bobty 5:5bccf48799d4 31 }
Bobty 5:5bccf48799d4 32
Bobty 5:5bccf48799d4 33 // Show count
Bobty 5:5bccf48799d4 34 _pc.printf("Count %d Rate(ms) %d\r\n", _pulseDetector->GetPulseCount(), _pulseDetector->GetPulseRateMs());
Bobty 5:5bccf48799d4 35 }
Bobty 5:5bccf48799d4 36 return edgeDetected;
Bobty 5:5bccf48799d4 37 }
Bobty 5:5bccf48799d4 38
Bobty 5:5bccf48799d4 39 // Get the current usage count from SD card
Bobty 5:5bccf48799d4 40 void GasUseCounter::GetGasCountFromSD()
Bobty 5:5bccf48799d4 41 {
Bobty 19:0367cb46d003 42 int count0 = 0;
Bobty 19:0367cb46d003 43 int count1 = 0;
Bobty 19:0367cb46d003 44 for (int i = 0; i < 2; i++)
Bobty 5:5bccf48799d4 45 {
Bobty 19:0367cb46d003 46 const char* fname = _gasUseFilename1;
Bobty 19:0367cb46d003 47 if (i == 1)
Bobty 19:0367cb46d003 48 fname = _gasUseFilename2;
Bobty 19:0367cb46d003 49 FILE* fp = fopen(fname, "r");
Bobty 19:0367cb46d003 50 if (fp == NULL)
Bobty 19:0367cb46d003 51 {
Bobty 19:0367cb46d003 52 _pc.printf ("Read Gas ... Filename %s not found\r\n", fname);
Bobty 19:0367cb46d003 53 }
Bobty 5:5bccf48799d4 54 else
Bobty 19:0367cb46d003 55 {
Bobty 19:0367cb46d003 56 int curCount = 0;
Bobty 19:0367cb46d003 57 int retVal = fscanf(fp, "%d", &curCount);
Bobty 19:0367cb46d003 58 fclose(fp);
Bobty 19:0367cb46d003 59 if (retVal == 1)
Bobty 19:0367cb46d003 60 _pc.printf ("Read from file %s last gas count = %d\r\n", fname, curCount);
Bobty 19:0367cb46d003 61 else
Bobty 19:0367cb46d003 62 _pc.printf ("Failed to read gas count from file %s\r\n", fname);
Bobty 19:0367cb46d003 63 if (i == 0)
Bobty 19:0367cb46d003 64 count0 = curCount;
Bobty 19:0367cb46d003 65 else
Bobty 19:0367cb46d003 66 count1 = curCount;
Bobty 19:0367cb46d003 67 }
Bobty 5:5bccf48799d4 68 }
Bobty 19:0367cb46d003 69 // Find the highest count
Bobty 19:0367cb46d003 70 int maxCount = count0;
Bobty 19:0367cb46d003 71 if (count1 > count0)
Bobty 19:0367cb46d003 72 maxCount = count1;
Bobty 19:0367cb46d003 73 _lastWrittenGasCount = maxCount;
Bobty 19:0367cb46d003 74 _pulseDetector->SetPulseCount(maxCount);
Bobty 19:0367cb46d003 75 _pc.printf ("Pulse count set to %d\r\n", maxCount);
Bobty 5:5bccf48799d4 76 }
Bobty 5:5bccf48799d4 77
Bobty 5:5bccf48799d4 78 void GasUseCounter::WriteGasCountToSD()
Bobty 5:5bccf48799d4 79 {
Bobty 19:0367cb46d003 80 for (int i = 0; i < 2; i++)
Bobty 5:5bccf48799d4 81 {
Bobty 19:0367cb46d003 82 const char* fname = _gasUseFilename1;
Bobty 19:0367cb46d003 83 if (i == 1)
Bobty 19:0367cb46d003 84 fname = _gasUseFilename2;
Bobty 19:0367cb46d003 85 FILE* fp = fopen(fname, "w");
Bobty 19:0367cb46d003 86 if (fp == NULL)
Bobty 19:0367cb46d003 87 {
Bobty 19:0367cb46d003 88 _pc.printf ("WriteGas ... Filename %s not found\r\n", fname);
Bobty 19:0367cb46d003 89 }
Bobty 19:0367cb46d003 90 else
Bobty 19:0367cb46d003 91 {
Bobty 19:0367cb46d003 92 fprintf(fp, "%d", GetCount());
Bobty 19:0367cb46d003 93 _pc.printf ("Written to %s last gas count = %d\r\n", fname, GetCount());
Bobty 19:0367cb46d003 94 fclose(fp);
Bobty 19:0367cb46d003 95 }
Bobty 5:5bccf48799d4 96 }
Bobty 5:5bccf48799d4 97 }