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Elijah Maluleke
Published © LGPL

A Smart Air Pollution and Noise Level indicator IoT Project

This IoT project helps reduce carbon dioxide emissions into the atmosphere. Carbon emission is the number one contributor to air pollution.

BeginnerWork in progressOver 2 days486
Best project using Zephyr RTOS
Connect things with code!
A Smart Air Pollution and Noise Level indicator IoT Project

Things used in this project

Hardware components

CY8CPROTO-062-4343W
Infineon CY8CPROTO-062-4343W
×1
Grove - Temperature, Humidity, Pressure and Gas Sensor (BME680)
Seeed Studio Grove - Temperature, Humidity, Pressure and Gas Sensor (BME680)
×1
S2GO 2 HALL TLE4966K
Infineon S2GO 2 HALL TLE4966K
×1
Grove - Multichannel Gas Sensor
Seeed Studio Grove - Multichannel Gas Sensor
×1
Infineon S2GO_3D_TLI493DW2BW-A0
×1
BMT ELECTRONIC BUZZER
×1
Polymer Lithium Ion Battery - 2200mAh 3.7V
Seeed Studio Polymer Lithium Ion Battery - 2200mAh 3.7V
×1
DC-DC XL6009 Auto Boost Buck(Cuk) Module
×1
1N4007 – High Voltage, High Current Rated Diode
1N4007 – High Voltage, High Current Rated Diode
×2
USB-A to Micro-USB Cable
USB-A to Micro-USB Cable
×1
USB Connector, USB Type A
USB Connector, USB Type A
×1
Electrolytic Capacitor, 100 µF
Electrolytic Capacitor, 100 µF
×1
40 PCB SIL Pin Header with Straight Pins
×1

Software apps and online services

VS Code
Microsoft VS Code
ModusToolbox™ Software
Infineon ModusToolbox™ Software
Zephyr RTOS
Zephyr Project Zephyr RTOS
Fritzing

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free
Experimental Board Strip Grid
Utility Knife Retractable 150mm
Premium Female/Female Jumper Wires, 40 x 3" (75mm)
Premium Female/Female Jumper Wires, 40 x 3" (75mm)

Story

Read more

Schematics

smart_pollution_indicator_bb_fritzing_breadboard

Code

smart_pollution_indicator_main_source_code

C/C++
/********************************************************************************
 * Copyright (c) 2016 Open-RnD Sp. z o.o.
 * Copyright (c) 2020 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 ********************************************************************************/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/util.h>
#include <zephyr/sys/printk.h>
#include <inttypes.h>

/********************************************************************************
 *
 ********************************************************************************/
//#define SLEEP_TIME_MS		1000
#define SLEEP_TIME_MS		2000

#define version				"v1.0.0"

#define LED_ON					0
#define LED_OFF					1

#define BUZZER_ON			0
#define BUZZER_OFF			1

#define PORT0_PIN04 	 	4
#define BUTTON		     	PORT0_PIN04
#define PORT13_PIN04	 	4
#define BUZZER			 	PORT13_PIN04
#define PORT13_PIN07 		7	 	
#define LED4				PORT13_PIN07

#define port0				"gpio_prt0"
#define port13				"gpio_prt13"

//
#define DEVICE_GPIO0 		DT_NODELABEL(gpio_prt0)
//#define DEVICE_GPIO1 		DT_NODELABEL(gpio_prt1)
//#define DEVICE_GPIO2  		DT_NODELABEL(gpio_prt2)
#define DEVICE_GPIO3  		DT_NODELABEL(gpio_prt3)
//#define DEVICE_GPIO4 		DT_NODELABEL(gpio_prt4)
#define DEVICE_GPIO5 		DT_NODELABEL(gpio_prt5)
#define DEVICE_GPIO6 		DT_NODELABEL(gpio_prt6)
//#define DEVICE_GPIO7 		DT_NODELABEL(gpio_prt7)
//#define DEVICE_GPIO8 		DT_NODELABEL(gpio_prt8)
#define DEVICE_GPIO9 		DT_NODELABEL(gpio_prt9)
//#define DEVICE_GPIO10 		DT_NODELABEL(gpio_prt10)
//#define DEVICE_GPIO11 		DT_NODELABEL(gpio_prt11)
#define DEVICE_GPIO12 		DT_NODELABEL(gpio_prt12)
#define DEVICE_GPIO13 		DT_NODELABEL(gpio_prt13)
//#define DEVICE_GPIO14 		DT_NODELABEL(gpio_prt14)

// 
const struct device *gpio0_dev = DEVICE_DT_GET(DEVICE_GPIO0);
//const struct device *gpio1_dev = DEVICE_DT_GET(DEVICE_GPIO1);
//const struct device *gpio2_dev = DEVICE_DT_GET(DEVICE_GPIO2);
const struct device *gpio3_dev = DEVICE_DT_GET(DEVICE_GPIO3);
//const struct device *gpio4_dev = DEVICE_DT_GET(DEVICE_GPIO4);
const struct device *gpio5_dev = DEVICE_DT_GET(DEVICE_GPIO5);
const struct device *gpio6_dev = DEVICE_DT_GET(DEVICE_GPIO6);
//const struct device *gpio7_dev = DEVICE_DT_GET(DEVICE_GPIO7);
//const struct device *gpio8_dev = DEVICE_DT_GET(DEVICE_GPIO8);
const struct device *gpio9_dev = DEVICE_DT_GET(DEVICE_GPIO9);
//const struct device *gpio10_dev = DEVICE_DT_GET(DEVICE_GPIO10);
//const struct device *gpio11_dev = DEVICE_DT_GET(DEVICE_GPIO11);
const struct device *gpio12_dev = DEVICE_DT_GET(DEVICE_GPIO12);
const struct device *gpio13_dev = DEVICE_DT_GET(DEVICE_GPIO13);
//const struct device *gpio14_dev = DEVICE_DT_GET(DEVICE_GPIO14);

uint16_t delay_led = 1000;

/********************************************************************************
 * Get button configuration from the devicetree sw0 alias. This is mandatory.
 ********************************************************************************/
static struct gpio_callback button_cb_data;

/********************************************************************************
 *
 ********************************************************************************/
void button_pressed(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
	printk("Button pressed at %" PRIu32 "\n", k_cycle_get_32());
	if(delay_led < 5000) {
		delay_led = delay_led + 1000;
		}
	else {
		delay_led = 1000;
	}
	printk("delay led %d\n\n\n", delay_led);
}

/********************************************************************************
 *
 ********************************************************************************/
void LED_BUZZER(void)
{
	int ret;

	ret = gpio_pin_set(gpio13_dev, LED4, LED_ON);
	ret = gpio_pin_set(gpio13_dev, BUZZER, BUZZER_ON);
	k_msleep(1000);	
	ret = gpio_pin_set(gpio13_dev, LED4, LED_OFF);
	ret = gpio_pin_set(gpio13_dev, BUZZER, BUZZER_OFF);
	k_msleep(1000);
}

/********************************************************************************
 *
 ********************************************************************************/
int main(void)
{
	int ret, i;

	printk("\nA Smart Air Pollution and Noise Level indicator IoT Project: %s\n\n\n", version);
	
	k_msleep(5000);

	if (!gpio_is_ready_dt(&gpio0_dev)) {
		printk("Error: button device %s is not ready\n", port0);
		return 0;
	}

	if (!gpio_is_ready_dt(&gpio13_dev)) {
		printk("Error: button device %s is not ready\n", port13);
		return 0;
	}
	
	ret = gpio_pin_configure(gpio13_dev, LED4, GPIO_OUTPUT);
	if (ret < 0) {
		return 0;
	}

	ret = gpio_pin_configure(gpio13_dev, BUZZER, GPIO_OUTPUT);
	if (ret < 0) {
		return 0;
	}

	ret = gpio_pin_configure(gpio0_dev, BUTTON, GPIO_INPUT);
	if (ret != 0) {
		printk("Error %d: failed to configure %s pin %d\n", ret, port0, BUTTON);
		return 0;
	}

	ret = gpio_pin_interrupt_configure(gpio0_dev, BUTTON, GPIO_INT_EDGE_TO_ACTIVE);
	if (ret != 0) {
		printk("Error %d: failed to configure interrupt on %s pin %d\n", ret, port0, BUTTON);
		return 0;
	}

	gpio_init_callback(&button_cb_data, button_pressed, BIT(BUTTON));
	gpio_add_callback(gpio0_dev, &button_cb_data);
	printk("Set up button at %s pin %d\n", port0, BUTTON);

	printk("Press the button\n");
	
	for(i = 0; i < 5; i++) {
		ret = gpio_pin_set(gpio13_dev, LED4, LED_ON);
		ret = gpio_pin_set(gpio13_dev, BUZZER, BUZZER_ON);
		k_msleep(delay_led);	
		ret = gpio_pin_set(gpio13_dev, LED4, LED_OFF);
		ret = gpio_pin_set(gpio13_dev, BUZZER, BUZZER_OFF);
		k_msleep(delay_led);
	}

	while (1) {
		k_msleep(30000);
		LED_BUZZER();
	}
	return 0;
}

/********************************************************************************
 *
 ********************************************************************************/

A Smart Air Pollution and Noise Level indicator IoT Project Code

This solution uses a carbon dioxide sensor to collect carbon dioxide data and a microphone to collect noise levels in an area where it is installed.

Credits

Elijah Maluleke

Elijah Maluleke

6 projects • 32 followers

Comments

Awards
Best project using Zephyr RTOS
Connect things with code!
Related channels and tags
  • Environmental Sensing
  • Environmental Sensing
  • Infineon
  • Internet of Things
  • Internet of Things
  • Microsoft
  • Seeed Studio
  • Sensors
  • Sensors
  • Zephyr Project