Weather man / Mbed 2 deprecated WeatherStation

This is mandatory

Dependencies:   BLE_API mbed nRF51822 SHT21_ncleee

main.cpp@4:fddb2d7c7c61, 2015-11-14 (annotated)

Committer:
PostaL
Date:
Sat Nov 14 21:09:57 2015 +0000
Revision:
4:fddb2d7c7c61
Parent:
3:b6d2c5195055
Child:
5:fe4888cc60cc
Added reading of humidity from DHT11 sensor

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PostaL 3:b6d2c5195055 1 #define I2C_SDA p3
PostaL 3:b6d2c5195055 2 #define I2C_SCL p4
PostaL 0:7f951f57dbd2 3
PostaL 0:7f951f57dbd2 4 #include "mbed.h"
PostaL 0:7f951f57dbd2 5 #include "BLE.h"
PostaL 2:654ee4b3950f 6 #include "battery.h"
PostaL 2:654ee4b3950f 7 #include "WeatherService.h"
PostaL 2:654ee4b3950f 8 #include "BatteryService.h"
PostaL 3:b6d2c5195055 9 #include "BMP180.h"
PostaL 4:fddb2d7c7c61 10 #include "DHT.h"
PostaL 0:7f951f57dbd2 11
PostaL 4:fddb2d7c7c61 12
PostaL 4:fddb2d7c7c61 13 float temperature;
PostaL 4:fddb2d7c7c61 14 float pressure;
PostaL 4:fddb2d7c7c61 15 float humidity;
PostaL 4:fddb2d7c7c61 16
PostaL 4:fddb2d7c7c61 17 BLE ble;
PostaL 4:fddb2d7c7c61 18
PostaL 3:b6d2c5195055 19 DigitalOut okLED(LED1);
PostaL 3:b6d2c5195055 20 DigitalOut errLED(LED2);
PostaL 3:b6d2c5195055 21 DigitalOut instrumentsPower(p30);
PostaL 0:7f951f57dbd2 22
PostaL 3:b6d2c5195055 23 BMP180 bmp180;
PostaL 4:fddb2d7c7c61 24 DHT dht(p5,DHT11);
PostaL 3:b6d2c5195055 25
PostaL 3:b6d2c5195055 26 const static char DEVICE_NAME[] = "Weather Station";
PostaL 3:b6d2c5195055 27
PostaL 3:b6d2c5195055 28 static const uint16_t serviceList[] = {
PostaL 2:654ee4b3950f 29 GattService::UUID_ENVIRONMENTAL_SERVICE,
PostaL 2:654ee4b3950f 30 GattService::UUID_BATTERY_SERVICE
PostaL 2:654ee4b3950f 31 };
PostaL 3:b6d2c5195055 32
PostaL 0:7f951f57dbd2 33 static volatile bool triggerSensorPolling = false;
PostaL 0:7f951f57dbd2 34
PostaL 0:7f951f57dbd2 35 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
PostaL 0:7f951f57dbd2 36 {
PostaL 4:fddb2d7c7c61 37 /* Restart Advertising on disconnection*/
PostaL 0:7f951f57dbd2 38 ble.gap().startAdvertising();
PostaL 0:7f951f57dbd2 39 }
PostaL 0:7f951f57dbd2 40
PostaL 1:f7fe82a00d4e 41 void blink(void)
PostaL 0:7f951f57dbd2 42 {
PostaL 3:b6d2c5195055 43 // statusLED = !statusLED;
PostaL 0:7f951f57dbd2 44 triggerSensorPolling = true;
PostaL 0:7f951f57dbd2 45 }
PostaL 0:7f951f57dbd2 46
PostaL 4:fddb2d7c7c61 47 void updateFromBMP180() {
PostaL 4:fddb2d7c7c61 48 uint8_t c = bmp180.readByte(BMP180_ADDRESS, BMP180_WHO_AM_I);
PostaL 4:fddb2d7c7c61 49
PostaL 4:fddb2d7c7c61 50 printf("BMP-180 is 0x%x\n\r", c);
PostaL 4:fddb2d7c7c61 51 printf("BMP-180 should be 0x55\n");
PostaL 4:fddb2d7c7c61 52
PostaL 4:fddb2d7c7c61 53 if(c == 0x55) {
PostaL 4:fddb2d7c7c61 54 printf("BMP-180 online\n");
PostaL 4:fddb2d7c7c61 55
PostaL 4:fddb2d7c7c61 56 printf("Calibrating BMP-180...");
PostaL 4:fddb2d7c7c61 57 bmp180.BMP180Calibration();
PostaL 4:fddb2d7c7c61 58 printf("done\n");
PostaL 4:fddb2d7c7c61 59 }
PostaL 4:fddb2d7c7c61 60 else
PostaL 4:fddb2d7c7c61 61 {
PostaL 4:fddb2d7c7c61 62 printf("BMP-180 unreachable\n");
PostaL 4:fddb2d7c7c61 63 return;
PostaL 4:fddb2d7c7c61 64 }
PostaL 4:fddb2d7c7c61 65
PostaL 4:fddb2d7c7c61 66 temperature = (float)bmp180.BMP180GetTemperature()/10.0f;
PostaL 4:fddb2d7c7c61 67 pressure = (float)bmp180.BMP180GetPressure();
PostaL 4:fddb2d7c7c61 68 }
PostaL 4:fddb2d7c7c61 69
PostaL 4:fddb2d7c7c61 70 void updateFromDHT() {
PostaL 4:fddb2d7c7c61 71 wait(3);
PostaL 4:fddb2d7c7c61 72 int err = dht.readData();
PostaL 4:fddb2d7c7c61 73 if (err == 0) {
PostaL 4:fddb2d7c7c61 74 humidity = dht.ReadHumidity();
PostaL 4:fddb2d7c7c61 75 printf("Dew point is %4.2f \n",dht.CalcdewPoint(dht.ReadTemperature(CELCIUS), humidity));
PostaL 4:fddb2d7c7c61 76 printf("Dew point (fast) is %4.2f \n",dht.CalcdewPointFast(dht.ReadTemperature(CELCIUS), humidity));
PostaL 4:fddb2d7c7c61 77 }
PostaL 4:fddb2d7c7c61 78 else {
PostaL 4:fddb2d7c7c61 79 printf("Error reading DHT: %d \n", err);
PostaL 4:fddb2d7c7c61 80 }
PostaL 4:fddb2d7c7c61 81 }
PostaL 4:fddb2d7c7c61 82
PostaL 0:7f951f57dbd2 83 int main(void)
PostaL 0:7f951f57dbd2 84 {
PostaL 4:fddb2d7c7c61 85 printf("Start\n");
PostaL 3:b6d2c5195055 86
PostaL 3:b6d2c5195055 87 okLED = 1;
PostaL 3:b6d2c5195055 88 errLED = 1;
PostaL 3:b6d2c5195055 89
PostaL 0:7f951f57dbd2 90 Ticker ticker;
PostaL 4:fddb2d7c7c61 91 ticker.attach(blink, 5);
PostaL 0:7f951f57dbd2 92
PostaL 0:7f951f57dbd2 93 ble.init();
PostaL 0:7f951f57dbd2 94 ble.gap().onDisconnection(disconnectionCallback);
PostaL 0:7f951f57dbd2 95
PostaL 2:654ee4b3950f 96 /* Setup weather service. */
PostaL 2:654ee4b3950f 97 WeatherService weatherService(ble);
PostaL 2:654ee4b3950f 98 BatteryService batteryService(ble, 0);
PostaL 2:654ee4b3950f 99 Battery battery(BATTERY_PIN);
PostaL 0:7f951f57dbd2 100
PostaL 0:7f951f57dbd2 101 /* setup advertising */
PostaL 0:7f951f57dbd2 102 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
PostaL 3:b6d2c5195055 103 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)serviceList, sizeof(serviceList));
PostaL 2:654ee4b3950f 104 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::UNKNOWN);
PostaL 0:7f951f57dbd2 105 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
PostaL 0:7f951f57dbd2 106 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
PostaL 0:7f951f57dbd2 107 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
PostaL 0:7f951f57dbd2 108 ble.gap().startAdvertising();
PostaL 0:7f951f57dbd2 109
PostaL 0:7f951f57dbd2 110 while (true) {
PostaL 0:7f951f57dbd2 111 if (triggerSensorPolling && ble.getGapState().connected) {
PostaL 3:b6d2c5195055 112 okLED = 1;
PostaL 0:7f951f57dbd2 113 triggerSensorPolling = false;
PostaL 0:7f951f57dbd2 114
PostaL 4:fddb2d7c7c61 115 instrumentsPower = 1;
PostaL 4:fddb2d7c7c61 116 wait(1);
PostaL 4:fddb2d7c7c61 117 updateFromBMP180();
PostaL 4:fddb2d7c7c61 118 updateFromDHT();
PostaL 4:fddb2d7c7c61 119 instrumentsPower = 0;
PostaL 4:fddb2d7c7c61 120
PostaL 4:fddb2d7c7c61 121 printf("Temp: %.1f C \n", temperature);
PostaL 4:fddb2d7c7c61 122 printf("Pressure: %.3f Pa \n", pressure);
PostaL 4:fddb2d7c7c61 123 printf("Humidity: %.1f % \n", humidity);
PostaL 4:fddb2d7c7c61 124 printf("---\n");
PostaL 3:b6d2c5195055 125
PostaL 3:b6d2c5195055 126 weatherService.updateTemperature(temperature);
PostaL 3:b6d2c5195055 127 weatherService.updatePressure(pressure);
PostaL 4:fddb2d7c7c61 128 weatherService.updateHumidity(humidity);
PostaL 3:b6d2c5195055 129
PostaL 3:b6d2c5195055 130
PostaL 2:654ee4b3950f 131 batteryService.updateBatteryLevel(battery.read());
PostaL 0:7f951f57dbd2 132 } else {
PostaL 0:7f951f57dbd2 133 ble.waitForEvent();
PostaL 0:7f951f57dbd2 134 }
PostaL 0:7f951f57dbd2 135 }
PostaL 0:7f951f57dbd2 136 }