Christian Andresen / Mbed OS GCOM

Greenhouse Climate Observation Module

Dependencies:   BSP_DISCO_F746NG DHT

main.cpp@1:4363657c576d, 2020-01-22 (annotated)

Committer:
chri721u
Date:
Wed Jan 22 07:27:47 2020 +0000
Revision:
1:4363657c576d
Parent:
0:a5831f680465
Child:
2:739ba85b7a90
V0.1; Enabled accurate temperature measurement(celsius); Enabled accurate humidity measurement

Who changed what in which revision?

UserRevisionLine numberNew contents of line
chri721u 0:a5831f680465 1 /*
chri721u 0:a5831f680465 2 Developer: Christian Andresen
chri721u 0:a5831f680465 3
chri721u 0:a5831f680465 4 Project name: Project Greenhouse
chri721u 0:a5831f680465 5
chri721u 0:a5831f680465 6 Brief description:
chri721u 0:a5831f680465 7 Microcontroller observing the climate within a greenhouse, and displaying warnings/information as needed.
chri721u 0:a5831f680465 8 Sensors monitor light levels, as well as temperature and humidity.
chri721u 0:a5831f680465 9 To simulate an actual greenhouse, LEDs will be used in place of actual influences.
chri721u 0:a5831f680465 10
chri721u 0:a5831f680465 11 Objectives:
chri721u 0:a5831f680465 12 - Able to set controller location (Which section/greenhouse is it located in)
chri721u 0:a5831f680465 13 - Able to open window at certain temperature tresholds (For 5 minutes)
chri721u 0:a5831f680465 14 - Water plants at regular intervals (Twice a day)
chri721u 0:a5831f680465 15 - Plants must have light for at least 12 hours. If weather is cloudy, artificial lights.
chri721u 0:a5831f680465 16 - Testmode: Alternate time-tracking system, much faster than 24 hour system.
chri721u 1:4363657c576d 17
chri721u 1:4363657c576d 18 REMEMBER TO RETURN BORROWED LED SOCKETS
chri721u 0:a5831f680465 19 */
chri721u 0:a5831f680465 20
chri721u 0:a5831f680465 21 #include "mbed.h" // Mbed header from mbed-os version 5
chri721u 0:a5831f680465 22 #include "stm32746g_discovery_lcd.h" // Last updated 27/11/2019
chri721u 0:a5831f680465 23 #include "DHT.h" // Author: Wim De Roeve
chri721u 0:a5831f680465 24 #include "bootup.h" // Author: Christian Andresen
chri721u 0:a5831f680465 25
chri721u 0:a5831f680465 26 // Sensor Inputs
chri721u 0:a5831f680465 27 AnalogIn temp_sensor(A0);
chri721u 0:a5831f680465 28 DHT humid_sensor(A1, DHT22);
chri721u 0:a5831f680465 29 AnalogIn light_sensor(A2);
chri721u 0:a5831f680465 30
chri721u 0:a5831f680465 31 /* LED Outputs */
chri721u 1:4363657c576d 32 DigitalOut humid_led(D2); // Blue LED
chri721u 0:a5831f680465 33 DigitalOut temp_led(D5); // Red LED
chri721u 0:a5831f680465 34 DigitalOut water_led(D6); // Blue LED
chri721u 0:a5831f680465 35 DigitalOut window_led(D7); // Green LED
chri721u 0:a5831f680465 36 DigitalOut light_led(D8); // Yellow LED
chri721u 0:a5831f680465 37
chri721u 0:a5831f680465 38 // Call Bootup class from bootup.h as LCD_Start
chri721u 0:a5831f680465 39 bootup LCD_Start;
chri721u 0:a5831f680465 40
chri721u 0:a5831f680465 41 // Multithreading threads
chri721u 0:a5831f680465 42 Thread tTemp;
chri721u 0:a5831f680465 43 Thread tHumid;
chri721u 0:a5831f680465 44 Thread tLight;
chri721u 0:a5831f680465 45 Thread tWater;
chri721u 0:a5831f680465 46
chri721u 0:a5831f680465 47 uint8_t text[30]; // Prepare text element for later print to LCD
chri721u 0:a5831f680465 48
chri721u 0:a5831f680465 49 void Window_Open()
chri721u 0:a5831f680465 50 {
chri721u 0:a5831f680465 51 for( int a = 1; a < 10; a = a + 1 ) {
chri721u 0:a5831f680465 52 window_led = 1;
chri721u 0:a5831f680465 53 wait(1);
chri721u 0:a5831f680465 54 printf("Window open for %d minutes", a);
chri721u 0:a5831f680465 55 }
chri721u 0:a5831f680465 56 window_led = 0;
chri721u 0:a5831f680465 57 }
chri721u 0:a5831f680465 58
chri721u 1:4363657c576d 59 void Water_Spray()
chri721u 1:4363657c576d 60 {
chri721u 1:4363657c576d 61 // While humidity is under acceptable levels, this function would spray water. Since it cannot be acurately simultaed, this function will largely remain empty.
chri721u 1:4363657c576d 62 humid_led = 1;
chri721u 1:4363657c576d 63 wait(0.5);
chri721u 1:4363657c576d 64 humid_led = 0;
chri721u 1:4363657c576d 65
chri721u 1:4363657c576d 66 }
chri721u 1:4363657c576d 67
chri721u 0:a5831f680465 68 void Temp_Display()
chri721u 0:a5831f680465 69 {
chri721u 0:a5831f680465 70 while(1) {
chri721u 0:a5831f680465 71 // Monitor temperatures and display results on LCD screen
chri721u 0:a5831f680465 72 float temp = temp_sensor.read();
chri721u 0:a5831f680465 73 wait(1);
chri721u 0:a5831f680465 74 sprintf((char*)text, "Temperature: %.1f C", temp*100/2);
chri721u 0:a5831f680465 75 BSP_LCD_DisplayStringAt(0, 125, (uint8_t *)&text, CENTER_MODE);
chri721u 0:a5831f680465 76 }
chri721u 0:a5831f680465 77 }
chri721u 0:a5831f680465 78
chri721u 0:a5831f680465 79 void Humid_Display()
chri721u 0:a5831f680465 80 {
chri721u 0:a5831f680465 81 while(1) {
chri721u 1:4363657c576d 82 humid_led = 1;
chri721u 0:a5831f680465 83 // Monitor humidity and display results on LCD screen
chri721u 0:a5831f680465 84 float humid = humid_sensor.ReadHumidity();
chri721u 1:4363657c576d 85 int dataread = humid_sensor.readData();
chri721u 0:a5831f680465 86 wait(1);
chri721u 0:a5831f680465 87 sprintf((char*)text, "Humidity: %.1f", humid);
chri721u 0:a5831f680465 88 BSP_LCD_DisplayStringAt(0, 175, (uint8_t *)&text, CENTER_MODE);
chri721u 1:4363657c576d 89
chri721u 1:4363657c576d 90 if(humid > 70) {
chri721u 1:4363657c576d 91 Window_Open();
chri721u 1:4363657c576d 92 } else if(humid < 50) {
chri721u 1:4363657c576d 93 Water_Spray();
chri721u 1:4363657c576d 94 }
chri721u 0:a5831f680465 95 }
chri721u 0:a5831f680465 96 }
chri721u 0:a5831f680465 97
chri721u 0:a5831f680465 98 int main()
chri721u 0:a5831f680465 99 {
chri721u 0:a5831f680465 100 LCD_Start.LCD_Bootup();
chri721u 0:a5831f680465 101 // Start multithread
chri721u 1:4363657c576d 102 tHumid.start(&Humid_Display);
chri721u 0:a5831f680465 103 tTemp.start(&Temp_Display);
chri721u 1:4363657c576d 104 while(1) {}
chri721u 0:a5831f680465 105 }