ST Americas mbed Team / Mbed 2 deprecated SeeedStudio_Grove_Sensors_Demo

Seeed Studio Grove Sensors Example

Dependencies:   mbed DHT DigitDisplay

Fork of STM32_Read_Sensors_Example by AT&T Developer Summit Hackathon 2016

main.cpp@5:41a15c0653e8, 2014-12-17 (annotated)

Committer:
dangriffin
Date:
Wed Dec 17 23:56:26 2014 +0000
Revision:
5:41a15c0653e8
Parent:
4:de41ec16d765
Child:
6:d25c6da3f0b6
Add support for DHT11 temp/humidity sensor. ; Bring mbed library up to date.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:005629fe3609 1 #include "mbed.h"
joe_tijerina 3:6d8574d8c9c1 2 #include "ADXL345_I2C.h"
dangriffin 5:41a15c0653e8 3 #include "DHT.h"
joe_tijerina 3:6d8574d8c9c1 4
screamer 0:005629fe3609 5
joe_tijerina 4:de41ec16d765 6 //#define LED // Grove LED
joe_tijerina 4:de41ec16d765 7 //#define ACCEL // SEN04051P Grove - 3-Axis Digital Accelerometer(±16g)
joe_tijerina 4:de41ec16d765 8 //#define LIGHT_SENSOR // Grove Light Sensor using GL5528 photoresistor
joe_tijerina 4:de41ec16d765 9 //#define WATER_SENSOR // Grove Water Sensor
joe_tijerina 4:de41ec16d765 10 //#define GAS_SENSOR // SEN90512P Grove - Gas Sensor(MQ2)
dangriffin 5:41a15c0653e8 11 //#define TEMP_SENSOR // Grove Temperature Sensor using TTC03 Thermistor
dangriffin 5:41a15c0653e8 12 #define TEMP_HUMID_SENSOR // Grove Temp/Humidity Sensor (DHT11)
screamer 0:005629fe3609 13
joe_tijerina 3:6d8574d8c9c1 14
joe_tijerina 3:6d8574d8c9c1 15 AnalogIn temp_sensor(A0);
joe_tijerina 3:6d8574d8c9c1 16 AnalogIn analog_light_sensor_read(A1);
joe_tijerina 3:6d8574d8c9c1 17 DigitalIn water_sensor(A2);
joe_tijerina 3:6d8574d8c9c1 18 AnalogIn gas_sensor(A3);
joe_tijerina 3:6d8574d8c9c1 19 DigitalOut my_led(D7);
joe_tijerina 3:6d8574d8c9c1 20 ADXL345_I2C accelerometer(D14, D15);
dangriffin 5:41a15c0653e8 21 DHT temp_humid_sensor(A0, DHT11); // See DHT.h for other supported sensor types
joe_tijerina 3:6d8574d8c9c1 22
screamer 0:005629fe3609 23 int main() {
joe_tijerina 3:6d8574d8c9c1 24
joe_tijerina 3:6d8574d8c9c1 25 float vol;
joe_tijerina 3:6d8574d8c9c1 26 float Rsensor;
joe_tijerina 3:6d8574d8c9c1 27 int gas_sensor_value;
joe_tijerina 3:6d8574d8c9c1 28 int sound_sensor_value;
joe_tijerina 3:6d8574d8c9c1 29 int adc_scale = 4096;
joe_tijerina 3:6d8574d8c9c1 30 int readings[3] = {0, 0, 0};
joe_tijerina 3:6d8574d8c9c1 31 int sensorValue;
joe_tijerina 3:6d8574d8c9c1 32 int B = 3975;
joe_tijerina 3:6d8574d8c9c1 33 float resistance;
joe_tijerina 3:6d8574d8c9c1 34 float temperature;
joe_tijerina 3:6d8574d8c9c1 35 float temperature_f;
dangriffin 5:41a15c0653e8 36 float humidity;
dangriffin 5:41a15c0653e8 37 float dewpoint;
joe_tijerina 3:6d8574d8c9c1 38 char amb_temp[6];
joe_tijerina 3:6d8574d8c9c1 39 int a;
joe_tijerina 3:6d8574d8c9c1 40
joe_tijerina 3:6d8574d8c9c1 41 #ifdef ACCEL
joe_tijerina 3:6d8574d8c9c1 42 printf("Starting ADXL345 test...\n\r");
joe_tijerina 3:6d8574d8c9c1 43 wait(.001);
joe_tijerina 3:6d8574d8c9c1 44 printf("Device ID is: 0x%02x\n\r", accelerometer.getDeviceID());
joe_tijerina 3:6d8574d8c9c1 45 wait(.001);
joe_tijerina 3:6d8574d8c9c1 46
joe_tijerina 3:6d8574d8c9c1 47 // These are here to test whether any of the initialization fails. It will print the failure
joe_tijerina 3:6d8574d8c9c1 48 if (accelerometer.setPowerControl(0x00))
joe_tijerina 3:6d8574d8c9c1 49 {
joe_tijerina 3:6d8574d8c9c1 50 printf("didn't intitialize power control\n");
joe_tijerina 3:6d8574d8c9c1 51 return 0;
joe_tijerina 3:6d8574d8c9c1 52 }
joe_tijerina 3:6d8574d8c9c1 53
joe_tijerina 3:6d8574d8c9c1 54 //Full resolution, +/-16g, 4mg/LSB.
joe_tijerina 3:6d8574d8c9c1 55 wait(.001);
joe_tijerina 3:6d8574d8c9c1 56
joe_tijerina 3:6d8574d8c9c1 57 if(accelerometer.setDataFormatControl(0x0B))
joe_tijerina 3:6d8574d8c9c1 58 {
joe_tijerina 3:6d8574d8c9c1 59 printf("didn't set data format\n");
joe_tijerina 3:6d8574d8c9c1 60 return 0;
joe_tijerina 3:6d8574d8c9c1 61 }
joe_tijerina 3:6d8574d8c9c1 62 wait(.001);
joe_tijerina 3:6d8574d8c9c1 63
joe_tijerina 3:6d8574d8c9c1 64 //3.2kHz data rate.
joe_tijerina 3:6d8574d8c9c1 65 if(accelerometer.setDataRate(ADXL345_3200HZ))
joe_tijerina 3:6d8574d8c9c1 66 {
joe_tijerina 3:6d8574d8c9c1 67 printf("didn't set data rate\n");
joe_tijerina 3:6d8574d8c9c1 68 return 0;
joe_tijerina 3:6d8574d8c9c1 69 }
joe_tijerina 3:6d8574d8c9c1 70 wait(.001);
joe_tijerina 3:6d8574d8c9c1 71
joe_tijerina 3:6d8574d8c9c1 72 //Measurement mode.
joe_tijerina 3:6d8574d8c9c1 73 if(accelerometer.setPowerControl(MeasurementMode))
joe_tijerina 3:6d8574d8c9c1 74 {
joe_tijerina 3:6d8574d8c9c1 75 printf("didn't set the power control to measurement\n");
joe_tijerina 3:6d8574d8c9c1 76 return 0;
joe_tijerina 3:6d8574d8c9c1 77 }
joe_tijerina 3:6d8574d8c9c1 78 #endif
joe_tijerina 3:6d8574d8c9c1 79
joe_tijerina 3:6d8574d8c9c1 80 while(1)
joe_tijerina 3:6d8574d8c9c1 81 {
joe_tijerina 3:6d8574d8c9c1 82 #ifdef LED
joe_tijerina 3:6d8574d8c9c1 83 my_led = 1; // LED is ON
bcostm 2:b60cb847489c 84 wait(0.2); // 200 ms
joe_tijerina 3:6d8574d8c9c1 85 my_led = 0; // LED is OFF
bcostm 2:b60cb847489c 86 wait(1.0); // 1 sec
joe_tijerina 3:6d8574d8c9c1 87 #endif
joe_tijerina 3:6d8574d8c9c1 88
joe_tijerina 3:6d8574d8c9c1 89 #ifdef WATER_SENSOR
joe_tijerina 3:6d8574d8c9c1 90 printf("water_sensor: %d \n\r", water_sensor.read());
joe_tijerina 3:6d8574d8c9c1 91 wait(0.5);
joe_tijerina 3:6d8574d8c9c1 92 #endif
joe_tijerina 3:6d8574d8c9c1 93
joe_tijerina 3:6d8574d8c9c1 94 #ifdef GAS_SENSOR
joe_tijerina 3:6d8574d8c9c1 95 gas_sensor_value = gas_sensor.read_u16();
joe_tijerina 3:6d8574d8c9c1 96 printf("gas_sensor_value: 0x%X \n\r", gas_sensor_value);
joe_tijerina 3:6d8574d8c9c1 97
joe_tijerina 3:6d8574d8c9c1 98 vol = (float)gas_sensor_value/adc_scale*5.0;
joe_tijerina 3:6d8574d8c9c1 99 printf("gas vol: %f \n\r", vol);
joe_tijerina 3:6d8574d8c9c1 100 wait(1);
joe_tijerina 3:6d8574d8c9c1 101 #endif
joe_tijerina 3:6d8574d8c9c1 102
joe_tijerina 3:6d8574d8c9c1 103 #ifdef ACCEL
joe_tijerina 3:6d8574d8c9c1 104 accelerometer.getOutput(readings);
joe_tijerina 3:6d8574d8c9c1 105 wait(0.1); // 100 ms
joe_tijerina 3:6d8574d8c9c1 106
joe_tijerina 3:6d8574d8c9c1 107 /* x-axis, y-axis and z-axis */
joe_tijerina 3:6d8574d8c9c1 108 printf("%d, %d, %d\n\r", (int16_t)readings[0], (int16_t)readings[1], (int16_t)readings[2]);
joe_tijerina 3:6d8574d8c9c1 109 #endif
joe_tijerina 3:6d8574d8c9c1 110
joe_tijerina 3:6d8574d8c9c1 111 #ifdef LIGHT_SENSOR
joe_tijerina 3:6d8574d8c9c1 112 sensorValue = analog_light_sensor_read.read_u16();
joe_tijerina 3:6d8574d8c9c1 113 Rsensor=(float)(adc_scale-sensorValue)*10/sensorValue;
joe_tijerina 3:6d8574d8c9c1 114 printf("Light Sensor Analog Reading is 0x%X = %d ", sensorValue, sensorValue);
joe_tijerina 3:6d8574d8c9c1 115 printf("The sensor resistance is %f \n\n\r", Rsensor);
joe_tijerina 3:6d8574d8c9c1 116 wait(1); // 1s
joe_tijerina 3:6d8574d8c9c1 117 #endif
joe_tijerina 3:6d8574d8c9c1 118
joe_tijerina 3:6d8574d8c9c1 119 #ifdef TEMP_SENSOR
joe_tijerina 3:6d8574d8c9c1 120 a = temp_sensor.read_u16();
joe_tijerina 3:6d8574d8c9c1 121
joe_tijerina 3:6d8574d8c9c1 122 resistance = (float)(adc_scale-a)*10000/a; //get the resistance of the sensor;
joe_tijerina 3:6d8574d8c9c1 123 temperature = 1/(log(resistance/10000)/B+1/298.15)-273.15; //convert to temperature via datasheet ;
joe_tijerina 3:6d8574d8c9c1 124 temperature_f = (1.8 * temperature) + 32.0;
joe_tijerina 3:6d8574d8c9c1 125 sprintf(amb_temp, "%0.2f", temperature_f);
joe_tijerina 3:6d8574d8c9c1 126
joe_tijerina 3:6d8574d8c9c1 127 printf("Temp Sensor Analog Reading is 0x%X = %d ", a, a);
joe_tijerina 3:6d8574d8c9c1 128 printf("Current Temperature: %f C %f F \n\r", temperature, temperature_f);
joe_tijerina 3:6d8574d8c9c1 129 wait(1); // 1s
joe_tijerina 3:6d8574d8c9c1 130 #endif
dangriffin 5:41a15c0653e8 131
dangriffin 5:41a15c0653e8 132 #ifdef TEMP_HUMID_SENSOR
dangriffin 5:41a15c0653e8 133 temp_humid_sensor.readData();
dangriffin 5:41a15c0653e8 134
dangriffin 5:41a15c0653e8 135 temperature = temp_humid_sensor.ReadTemperature(CELCIUS);
dangriffin 5:41a15c0653e8 136 temperature_f = temp_humid_sensor.ReadTemperature(FARENHEIT);
dangriffin 5:41a15c0653e8 137 humidity = temp_humid_sensor.ReadHumidity();
dangriffin 5:41a15c0653e8 138 dewpoint = temp_humid_sensor.CalcdewPointFast(temperature, humidity);
dangriffin 5:41a15c0653e8 139
dangriffin 5:41a15c0653e8 140 printf("\r\n");
dangriffin 5:41a15c0653e8 141 printf("Temperature: %f C / %f F\r\n", temperature, temperature_f);
dangriffin 5:41a15c0653e8 142 printf("Humidity: %f%%\r\n", humidity);
dangriffin 5:41a15c0653e8 143 printf("Dewpoint: %f C / %f F\r\n", dewpoint, (dewpoint * 1.8f) + 32);
dangriffin 5:41a15c0653e8 144 wait(1);
dangriffin 5:41a15c0653e8 145 #endif
dangriffin 5:41a15c0653e8 146
screamer 0:005629fe3609 147 }
screamer 0:005629fe3609 148 }