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WeatherStation.cpp@12:856286ad4cdc, 2019-03-25 (annotated)

Committer:
loicguibert
Date:
Mon Mar 25 14:54:43 2019 +0000
Revision:
12:856286ad4cdc
Parent:
11:dbc310addbf6
Child:
14:c5578b5edabe
Advertising done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
loicguibert 4:bfe306335065 1 #include "WeatherStation.h"
loicguibert 4:bfe306335065 2
loicguibert 4:bfe306335065 3 // initialization of static data members
loicguibert 12:856286ad4cdc 4 const int WeatherStation::m_measurementInterval = 9000;
loicguibert 12:856286ad4cdc 5 const string WeatherStation::m_stationName = "GuiSpa";
loicguibert 4:bfe306335065 6
loicguibert 4:bfe306335065 7 // constructor
loicguibert 11:dbc310addbf6 8 WeatherStation::WeatherStation(IDevKit& iDevKit, Logger& logger, BLE& ble) :
loicguibert 12:856286ad4cdc 9 GAPPeripheral(ble, iDevKit, m_stationName, GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED, m_eventQueue, logger),
loicguibert 12:856286ad4cdc 10 m_iDevKit(iDevKit),
loicguibert 12:856286ad4cdc 11 m_logger(logger),
loicguibert 12:856286ad4cdc 12 m_lps25hb(m_iDevKit.getSDA(), m_iDevKit.getSCL(), m_logger),
loicguibert 12:856286ad4cdc 13 m_hdc1000(m_iDevKit.getSDA(), m_iDevKit.getSCL(), m_iDevKit.getDataRdy(), m_logger),
loicguibert 12:856286ad4cdc 14 m_history() {
loicguibert 12:856286ad4cdc 15 // Set the right timing at the Station's start
loicguibert 12:856286ad4cdc 16 time(NULL);
loicguibert 4:bfe306335065 17 }
loicguibert 4:bfe306335065 18
loicguibert 4:bfe306335065 19 void WeatherStation::start() {
loicguibert 4:bfe306335065 20 m_logger.log("WeatherStation is starting\r\n");
loicguibert 5:0d9e292a9d06 21
loicguibert 4:bfe306335065 22 // make sure that the LPW25HB device is present
loicguibert 4:bfe306335065 23 // if not log an error and return
loicguibert 5:0d9e292a9d06 24 if (m_lps25hb.probe()) {
loicguibert 5:0d9e292a9d06 25 m_logger.log("LPS25HB device found\r\n");
loicguibert 5:0d9e292a9d06 26 } else {
loicguibert 5:0d9e292a9d06 27 m_logger.log("Device LPS25HB not found!\r\n");
loicguibert 5:0d9e292a9d06 28 return;
loicguibert 5:0d9e292a9d06 29 }
loicguibert 5:0d9e292a9d06 30
loicguibert 4:bfe306335065 31 // make sure that the HDC1000 device is present
loicguibert 4:bfe306335065 32 // if not log an error and return
loicguibert 5:0d9e292a9d06 33 if (m_hdc1000.probe()) {
loicguibert 5:0d9e292a9d06 34 m_logger.log("HDC1000 device found\r\n");
loicguibert 5:0d9e292a9d06 35 } else {
loicguibert 5:0d9e292a9d06 36 m_logger.log("Device HDC1000 not found!\r\n");
loicguibert 5:0d9e292a9d06 37 return;
loicguibert 5:0d9e292a9d06 38 }
loicguibert 6:5f56e551f84f 39
loicguibert 6:5f56e551f84f 40 //Cleaning the console by the addition of a blank line
loicguibert 6:5f56e551f84f 41 m_logger.log("\r\n");
loicguibert 4:bfe306335065 42
loicguibert 4:bfe306335065 43 // schedule measurements every m_measurementInterval milliseconds
loicguibert 4:bfe306335065 44 // apply the same syntax as in the previous call
loicguibert 4:bfe306335065 45 // 1. the measurement interval is m_measurementInterval
loicguibert 4:bfe306335065 46 // 2. the object is the WeatherStation itself (recall how you refer to the current object in Java - the same applies in c++)
loicguibert 4:bfe306335065 47 // 3. the method to call is performMeasurements()
loicguibert 4:bfe306335065 48 // m_eventQueue.call_every(TO COMPLETED);
loicguibert 4:bfe306335065 49 m_eventQueue.call_every(m_measurementInterval, this, &WeatherStation::performMeasurements);
loicguibert 11:dbc310addbf6 50
loicguibert 12:856286ad4cdc 51 // Starting the BLE peripheral with Advertising State
loicguibert 11:dbc310addbf6 52 GAPPeripheral::advertise();
loicguibert 11:dbc310addbf6 53 }
loicguibert 4:bfe306335065 54
loicguibert 4:bfe306335065 55 void WeatherStation::performMeasurements(void) {
loicguibert 6:5f56e551f84f 56 m_logger.log("Performing measurements:\r\n");
loicguibert 4:bfe306335065 57
loicguibert 4:bfe306335065 58 // get and log pressure
loicguibert 12:856286ad4cdc 59 double pressure = m_lps25hb.getPressure();
loicguibert 12:856286ad4cdc 60 m_logger.log("Pressure: %.02f hPa\r\n", pressure);
loicguibert 4:bfe306335065 61
loicguibert 4:bfe306335065 62 // get and log temperature
loicguibert 12:856286ad4cdc 63 double temp = m_hdc1000.getTemperature();
loicguibert 12:856286ad4cdc 64 m_logger.log("Temperature: %.02f C\r\n", temp);
loicguibert 4:bfe306335065 65
loicguibert 4:bfe306335065 66 // get and log humidity
loicguibert 12:856286ad4cdc 67 double humidity = m_hdc1000.getHumidity();
loicguibert 12:856286ad4cdc 68 m_logger.log("Humidiy: %.02f %%\r\n", humidity);
loicguibert 4:bfe306335065 69
loicguibert 4:bfe306335065 70 // get and log the battery level
loicguibert 12:856286ad4cdc 71 uint8_t battery = m_iDevKit.getBatteryLevel();
loicguibert 12:856286ad4cdc 72 m_logger.log("Battery: %u mV\r\n", battery);
loicguibert 6:5f56e551f84f 73
loicguibert 12:856286ad4cdc 74 // Cleaning the console by the addition of a blank line
loicguibert 6:5f56e551f84f 75 m_logger.log("\r\n");
loicguibert 4:bfe306335065 76
loicguibert 12:856286ad4cdc 77 // get and encode the system's elapsed time
loicguibert 12:856286ad4cdc 78 time_t seconds = time(NULL);
loicguibert 12:856286ad4cdc 79 float time = (uint32_t)seconds;
loicguibert 12:856286ad4cdc 80
loicguibert 12:856286ad4cdc 81 // Saving the measured values
loicguibert 12:856286ad4cdc 82 m_history.addMeasurement(pressure, temp, humidity, time);
loicguibert 12:856286ad4cdc 83
loicguibert 12:856286ad4cdc 84 // Send the measured values for encoding
loicguibert 12:856286ad4cdc 85 setupAdvertisementPayload(pressure, temp, humidity);
loicguibert 12:856286ad4cdc 86 }
loicguibert 12:856286ad4cdc 87
loicguibert 12:856286ad4cdc 88 void WeatherStation::setupAdvertisementPayload(double pressure, double temp, double humidity) {
loicguibert 12:856286ad4cdc 89
loicguibert 12:856286ad4cdc 90 // Setting the right UUID (environmental values) to the Advertising Payload
loicguibert 12:856286ad4cdc 91 dataPayload[0].serviceUUID = GattService::UUID_ENVIRONMENTAL_SERVICE;
loicguibert 12:856286ad4cdc 92
loicguibert 12:856286ad4cdc 93 // Encode and store the measured environmental values to the Advertising Payload
loicguibert 12:856286ad4cdc 94 uint32_encode((uint32_t) (pressure * 10), &dataPayload[0].serviceData[0]);
loicguibert 12:856286ad4cdc 95 uint32_encode((int16_t) (temp * 100), &dataPayload[0].serviceData[4]); // Padding of 4 Bytes (= 32 bits as the pressure's type)
loicguibert 12:856286ad4cdc 96 uint32_encode((uint16_t) (humidity * 100), &dataPayload[0].serviceData[6]); // Padding of 2 Bytes (= 16 bits as the temperature's type)
loicguibert 12:856286ad4cdc 97
loicguibert 12:856286ad4cdc 98 // Setting the Advertising Payload length
loicguibert 12:856286ad4cdc 99 dataPayload[0].serviceDataLength = 8;
loicguibert 12:856286ad4cdc 100
loicguibert 12:856286ad4cdc 101 // Sending the Advertising Payload to the GAP Peripheral
loicguibert 12:856286ad4cdc 102 // Has just one Payload
loicguibert 12:856286ad4cdc 103 setAdvertisementServiceData(dataPayload, 1);
loicguibert 5:0d9e292a9d06 104 }