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
main.cpp
- Committer:
- Bobty
- Date:
- 2015-02-22
- Revision:
- 10:72eb217def1f
- Parent:
- 9:0e103c2f869a
- Child:
- 11:30182b9aa833
File content as of revision 10:72eb217def1f:
#include "mbed.h" #include "EthernetInterface.h" #include "NTPClient.h" #include "RdWebServer.h" #include "GasUseCounter.h" #include "Thermometers.h" #include "VoltAlerter.h" #include <stdarg.h> // Web and UDB ports const int WEBPORT = 80; // Port for web server const int BROADCAST_PORT = 42853; // Arbitrarily chosen port number // Ticker collects data //Ticker ticker; //const int TICK_MS = 50; const int LOOP_DELAY_IN_MS = 250; // Debugging and status RawSerial pc(USBTX, USBRX); DigitalOut led1(LED1); //ticking (flashes) DigitalOut led2(LED2); // DigitalOut led3(LED3); //socket connecting status DigitalOut led4(LED4); //server status // Web server EthernetInterface eth; UDPSocket sendUDPSocket; Endpoint broadcastEndpoint; // Network Time Protocol (NTP) NTPClient ntp; const int NTP_REFRESH_INTERVAL_HOURS = 1; // File system for SD card SDFileSystem sd(p5, p6, p7, p8, "sd"); // Gas use counter DigitalIn gasPulsePin(p21); const char* gasPulseFileName = "/sd/curPulse.txt"; const char* logFilename = "/sd/log.txt"; GasUseCounter gasUseCounter(gasPulseFileName, gasPulsePin, pc); // Thermometers - DS18B20 OneWire Thermometer connections const PinName tempSensorPins[] = { p22 }; Thermometers thermometers(sizeof(tempSensorPins)/sizeof(PinName), tempSensorPins, LOOP_DELAY_IN_MS); // Voltage Sensors / Alerters const int NUM_VOLT_ALERTERS = 3; VoltAlerter voltAlerter1(p23); VoltAlerter voltAlerter2(p24); VoltAlerter voltAlerter3(p25); // Broadcast message const char broadcastMsgPrefix[] = "{\"e\":["; const char broadcastMsgGasFormat[] = "{\"n\":\"gasCount\",\"v\":%d},{\"n\":\"gasPulseRateMs\",\"v\":%d,\"u\":\"ms\"}"; const char broadcastTemperatureFormat[] = "{\"n\":\"temp_%s\",\"v\":%0.1f,\"u\":\"degC\"}"; const char broadcastVoltAlerterFormat[] = "{\"n\":\"pump_%d\",\"v\":%d}"; const char broadcastMsgSuffix[] = "],\"bt\":%d}"; // Format message const int broadcastMsgLen = sizeof(broadcastMsgPrefix) + sizeof(broadcastMsgGasFormat) + (sizeof(broadcastTemperatureFormat)*Thermometers::MAX_THERMOMETERS) + (sizeof(broadcastVoltAlerterFormat)*NUM_VOLT_ALERTERS) + sizeof(broadcastMsgSuffix) + 60; char broadcastMsgBuffer[broadcastMsgLen]; // Utility function to log data void LogData(const char* format, ...) { FILE* fp = fopen(logFilename, "a"); if (fp == NULL) { pc.printf ("Log ... Filename %s not found\r\n", logFilename); } else { va_list argptr; va_start(argptr, format); vfprintf(fp, format, argptr); va_end(argptr); fclose(fp); } } // Send broadcast message with current data void SendInfoBroadcast() { led3 = true; // Init the sending socket sendUDPSocket.init(); sendUDPSocket.set_broadcasting(); broadcastEndpoint.set_address("255.255.255.255", BROADCAST_PORT); // Get temperature values TemperatureValue tempValues[Thermometers::MAX_THERMOMETERS]; int numTempValues = thermometers.GetTemperatureValues(Thermometers::MAX_THERMOMETERS, tempValues, 100); for (int tempIdx = 0; tempIdx < numTempValues; tempIdx++) { printf("Temp: %.1f, Addr: %s, Time: %d\r\n", tempValues[tempIdx].tempInCentigrade, tempValues[tempIdx].address, tempValues[tempIdx].timeStamp); } // Data format of the message - senml - https://tools.ietf.org/html/draft-jennings-senml-08 // { // "e": [ // {"n":"gasCount","v":%d}, // {"n":"gasPulseRateMs","v":%d,"u":"ms"}, // {"n":"temp_%s","v":%0.1f,"u":"degC"}, // ... // {"n":"pump_%d","v":%d}, // ... // ], // "bt": %d // } time_t timeNow = time(NULL); strcpy(broadcastMsgBuffer, broadcastMsgPrefix); sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastMsgGasFormat, gasUseCounter.GetCount(), gasUseCounter.GetPulseRateMs()); strcpy(broadcastMsgBuffer+strlen(broadcastMsgBuffer), ","); for (int tempIdx = 0; tempIdx < numTempValues; tempIdx++) { sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastTemperatureFormat, tempValues[tempIdx].address, tempValues[tempIdx].tempInCentigrade); strcpy(broadcastMsgBuffer+strlen(broadcastMsgBuffer), ","); } sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastVoltAlerterFormat, 1, voltAlerter1.GetState()); strcpy(broadcastMsgBuffer+strlen(broadcastMsgBuffer), ","); sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastVoltAlerterFormat, 2, voltAlerter2.GetState()); strcpy(broadcastMsgBuffer+strlen(broadcastMsgBuffer), ","); sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastVoltAlerterFormat, 3, voltAlerter3.GetState()); sprintf(broadcastMsgBuffer+strlen(broadcastMsgBuffer), broadcastMsgSuffix, timeNow); // Send int bytesToSend = strlen(broadcastMsgBuffer); int rslt = sendUDPSocket.sendTo(broadcastEndpoint, broadcastMsgBuffer, bytesToSend); if (rslt == bytesToSend) { pc.printf("Broadcast (len %d) Sent ok %s\r\n", bytesToSend, broadcastMsgBuffer); } else if (rslt == -1) { pc.printf("Broadcast Failed to send %s\r\n", broadcastMsgBuffer); } else { pc.printf("Broadcast Didn't send all of %s\r\n", broadcastMsgBuffer); } // Log char timeBuf[32]; time_t seconds = time(NULL); strftime(timeBuf, 32, "%Y-%m-%d %H:%M:%S", localtime(&seconds)); LogData("%s\t%d\t%d ms\n", timeBuf, gasUseCounter.GetCount(), gasUseCounter.GetPulseRateMs()); led3 = false; } // Ticker's tick function //void TickFunction() //{ //} char* getGasUseCallback(int method, char* cmdStr, char* argStr) { char* pResp = gasUseCounter.getGasUseCallback(cmdStr, argStr); pc.printf("Returning gas use %s\r\n", pResp); return pResp; } char* setGasUseCallback(int method, char* cmdStr, char* argStr) { pc.printf("Setting gas use count %s\r\n", argStr); int newGasUse = 0; char* eqStr = strchr(argStr, '='); if (eqStr == NULL) return "SetGasValue FAILED"; sscanf(eqStr+1, "%d", &newGasUse); gasUseCounter.SetCount(newGasUse); return "SetGasValue OK"; } void http_thread(void const* arg) { char* baseWebFolder = "/sd/"; RdWebServer webServer; webServer.addCommand("", RdWebServerCmdDef::CMD_SDORUSBFILE, NULL, "index.htm", false); webServer.addCommand("gear-gr.png", RdWebServerCmdDef::CMD_SDORUSBFILE, NULL, NULL, true); webServer.addCommand("getgascount", RdWebServerCmdDef::CMD_CALLBACK, &getGasUseCallback); webServer.addCommand("setgascount", RdWebServerCmdDef::CMD_CALLBACK, &setGasUseCallback); webServer.init(WEBPORT, &led4, baseWebFolder); webServer.run(); } void ntp_thread(void const* arg) { while (1) { pc.printf("Trying to update time...\r\n"); if (ntp.setTime("0.pool.ntp.org") == 0) { printf("Set time successfully\r\n"); time_t ctTime; ctTime = time(NULL); printf("Time is set to (UTC): %s\r\n", ctime(&ctTime)); } else { printf("Cannot set from NTP\r\n"); } // Refresh time every K hours for (int k = 0; k < NTP_REFRESH_INTERVAL_HOURS; k++) { // 1 hour for (int i = 0; i < 60; i++) { for (int j = 0; j < 60; j++) { osDelay(1000); } pc.printf("%d mins to next NTP time refresh\r\n", (NTP_REFRESH_INTERVAL_HOURS-k-1)*60 + (59-i)); } } } } int main() { pc.baud(115200); pc.printf("Gas Monitor V2 - Rob Dobson 2014\r\n"); printf("Broadcast Msg Len %d\r\n", broadcastMsgLen); // ticker.attach(&TickFunction,TICK_MS / 1000.0); // Initialise thermometers thermometers.Init(); // Get the current count from the SD Card gasUseCounter.Init(); // setup ethernet interface eth.init(); //Use DHCP eth.connect(); pc.printf("IP Address is %s\r\n", eth.getIPAddress()); // NTP Time setter Thread ntpTimeSetter(&ntp_thread); // Web Server Thread httpServer(&http_thread, NULL, osPriorityNormal, (DEFAULT_STACK_SIZE * 3)); // Time of last broadcast time_t timeOfLastBroadcast = time(NULL); const int TIME_BETWEEN_BROADCASTS_IN_SECS = 60; while(true) { osDelay(LOOP_DELAY_IN_MS); led1 = !led1; // Service gas count if (gasUseCounter.Service()) { SendInfoBroadcast(); timeOfLastBroadcast = time(NULL); } // Service thermometers thermometers.Service(); // Check if ready for a broadcast if ((time(NULL) - timeOfLastBroadcast) >= TIME_BETWEEN_BROADCASTS_IN_SECS) { SendInfoBroadcast(); timeOfLastBroadcast = time(NULL); } // Service volt alerters voltAlerter1.Service(); voltAlerter2.Service(); voltAlerter3.Service(); led2 = voltAlerter1.GetState(); } }