Jim Carver
Garage Door Monitor and Opener
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
Introduction
This system implements a simple garage door opener and environmental monitor. The hardware connects to the internet using Wi-Fi then on to the Pelion Device Management Platform which provides device monitoring and secure firmware updates over the air (FOTA). Pelion Device Management provides a flexible set of REST APIs which we will use to communicate to a web application running on an EC-2 instance in AWS. The web application will serve a web page where we can monitor and control our garage..
This project is intended to work on the DISCO-L475VG-IOT01A from ST Microelectronics It implements a simple actuator to drive a relay to simulate pushing the "open" button on older style garage doors which do not use a rolling code interface.
The system is designed to be mounted over the door so that the on board time of flight sensor can be used to detect if the door is open or closed.
The system also monitors temperature, humidity and barometric pressure.
Hardware Requirements:
DISCO-L475G-IOT01A https://os.mbed.com/platforms/ST-Discovery-L475E-IOT01A/
Seeed Studio Grove Relay module https://www.seeedstudio.com/Grove-Relay.html
Seeed Studio Grove cable, I used this one: https://www.seeedstudio.com/Grove-4-pin-Male-Jumper-to-Grove-4-pin-Conversion-Cable-5-PCs-per-Pack.html
Connect to the PMOD connector like this:
This shows how I installed so that the time of flight sensor can detect when the door is open
To use the project:
You will also need a Pelion developers account.
I suggest you first use the Pelion quick state to become familiar with Pelion Device Management. https://os.mbed.com/guides/connect-device-to-pelion/1/?board=ST-Discovery-L475E-IOT01A
Web Interface
For my web interface I am running node-red under Ubuntu in an EC2 instance on AWS. This can run for 12 month within the constraints of their free tier. Here is a tutorial: https://nodered.org/docs/getting-started/aws
You will also need to install several node-red add ons:
sudo npm install -g node-red-dashboard
sudo npm install -g node-red-contrib-mbed-cloud
sudo npm istall -g node-red-contrib-moment
After starting node-red import the contents of GarageFlow.txt from the project, pin the flow into the page.
To enable your web app to access your Pelion account you need an API key.
First you will neet to use your Pelion account to create an API key.
Now we need to apply that API key to your Node-Red flow.
Diff: main.cpp
- Revision:
- 12:1f1a50e973db
- Parent:
- 11:8df4529f060d
- Child:
- 13:42b49a0caade
--- a/main.cpp Mon Dec 10 10:42:29 2018 +0000
+++ b/main.cpp Mon Dec 10 17:19:20 2018 +0000
@@ -29,12 +29,12 @@
// #include "VL53L0X.h"
static DevI2C devI2c(PB_11,PB_10);
-static HTS221Sensor hum_temp(&devI2c);
-static LPS22HBSensor press_temp(&devI2c);
-static LSM6DSLSensor acc_gyro(&devI2c,LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW,PD_11); // low address
-static LIS3MDL magnetometer(&devI2c);
+static HTS221Sensor sen_hum_temp(&devI2c);
+static LPS22HBSensor sen_press_temp(&devI2c);
+static LSM6DSLSensor sen_acc_gyro(&devI2c,LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW,PD_11); // low address
+static LIS3MDL sen_mag(&devI2c);
static DigitalOut shutdown_pin(PC_6);
-// static VL53L0X range(&devI2c, &shutdown_pin, PC_7);
+// static VL53L0X sen_distance(&devI2c, &shutdown_pin, PC_7);
InterruptIn button(USER_BUTTON);
#define SENSORS_POLL_INTERVAL 1.0
@@ -56,14 +56,19 @@
DigitalOut led(LED1);
// Declaring pointers for access to Pelion Client resources outside of main()
-MbedCloudClientResource *button_res;
-MbedCloudClientResource *led_res;
+MbedCloudClientResource *res_button;
+MbedCloudClientResource *res_led;
+// Additional resources for sensor readings
+MbedCloudClientResource *res_humidity;
+MbedCloudClientResource *res_temperature;
#ifdef SENSORS_AND_BUTTONS
-// Additional resources for sensor readings
-MbedCloudClientResource *humidity_res;
-MbedCloudClientResource *temperature_res;
-MbedCloudClientResource *distance_res;
+MbedCloudClientResource *res_pressure;
+MbedCloudClientResource *res_temperature2;
+MbedCloudClientResource *res_magnometer;
+MbedCloudClientResource *res_accelerometer;
+MbedCloudClientResource *res_gyroscope;
+MbedCloudClientResource *res_distance;
#endif /* SENSORS_AND_BUTTONS */
// When the device is registered, this variable will be used to access various useful information, like device ID etc.
@@ -87,16 +92,16 @@
* @param size Size of the body
*/
void led_post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
- printf("POST received. Going to blink LED pattern: %s\n", led_res->get_value().c_str());
- led = atoi(led_res->get_value().c_str());
+ printf("POST received. Going to blink LED pattern: %s\n", res_led->get_value().c_str());
+ led = atoi(res_led->get_value().c_str());
}
/**
* Button function triggered by the physical button press or by timer depending on SENSORS_AND_BUTTONS macro.
*/
void button_press() {
- int v = button_res->get_value_int() + 1;
- button_res->set_value(v);
+ int v = res_button->get_value_int() + 1;
+ res_button->set_value(v);
printf("Button clicked %d times\n", v);
}
@@ -126,32 +131,32 @@
uint8_t id;
// Initialize sensors
- hum_temp.init(NULL);
- press_temp.init(NULL);
- acc_gyro.init(NULL);
- magnetometer.init(NULL);
+ sen_hum_temp.init(NULL);
+ sen_press_temp.init(NULL);
+ sen_acc_gyro.init(NULL);
+ sen_mag.init(NULL);
// range.init_sensor(VL53L0X_DEFAULT_ADDRESS);
/// Call sensors enable routines
- hum_temp.enable();
- press_temp.enable();
- //magnetometer.enable();
- acc_gyro.enable_x();
- acc_gyro.enable_g();
+ sen_hum_temp.enable();
+ sen_press_temp.enable();
+ //sen_mag.enable();
+ sen_acc_gyro.enable_x();
+ sen_acc_gyro.enable_g();
printf("\033[2J\033[20A");
- printf ("\r\n--- Sensors configuration ---\r\n\r\n");
+ printf ("\r\nSensors configuration:\r\n");
- hum_temp.read_id(&id);
+ sen_hum_temp.read_id(&id);
printf("HTS221 humidity & temperature = 0x%X\r\n", id);
- press_temp.read_id(&id);
+ sen_press_temp.read_id(&id);
printf("LPS22HB pressure & temperature = 0x%X\r\n", id);
- magnetometer.read_id(&id);
+ sen_mag.read_id(&id);
printf("LIS3MDL magnetometer = 0x%X\r\n", id);
- acc_gyro.read_id(&id);
+ sen_acc_gyro.read_id(&id);
printf("LSM6DSL accelerometer & gyroscope = 0x%X\r\n", id);
- printf("\n\r--- Reading sensor values ---\n\r"); ;
+ printf("\r\n"); ;
}
/**
@@ -159,44 +164,43 @@
* This function is called periodically.
*/
void sensors_update() {
- float value1, value2;
+ float fval1, fval2;
int32_t axes[3];
- uint32_t distance;
+ uint32_t uval;
printf("\r\n");
- value1 = value2 = 0.0;
- hum_temp.get_temperature(&value1);
- hum_temp.get_humidity(&value2);
+ fval1 = fval2 = 0.0;
+ sen_hum_temp.get_temperature(&fval1);
+ sen_hum_temp.get_humidity(&fval2);
if (endpointInfo) {
- temperature_res->set_value(value1);
- humidity_res->set_value(value2);
+ res_temperature->set_value(fval1);
+ res_humidity->set_value(fval2);
}
- printf("HTS221: [temp] %.2f C, [hum] %.2f%%\r\n", value1, value2);
+ printf("HTS221 temp: %7.2f C, humidity: %7.2f %%\r\n", fval1, fval2);
- value1 = value2 = 0.0;
- press_temp.get_temperature(&value1);
- // press_temp.get_pressure(&value2);
- printf("LPS22HB: [temp] %.2f C, [press] %.2f mbar\r\n", value1, value2);
- printf("Mag/Acc/Gyro readings: x, y, z\r\n");
+ fval1 = fval2 = 0.0;
+ sen_press_temp.get_temperature(&fval1);
+ sen_press_temp.get_pressure(&fval2);
+ printf("LPS22HB temp: %7.2f C, pressure: %7.2f mbar \r\n", fval1, fval2);
- magnetometer.get_m_axes(axes);
- printf("LIS3MDL [mag/mgauss]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]);
- acc_gyro.get_x_axes(axes);
- printf("LSM6DSL [acc/mg]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]);
- acc_gyro.get_g_axes(axes);
- printf("LSM6DSL [gyro/mdps]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]);
+ sen_mag.get_m_axes(axes);
+ printf("LIS3MDL mag: %7ld x, %7ld y, %7ld z [mgauss] \r\n", axes[0], axes[1], axes[2]);
+ sen_acc_gyro.get_x_axes(axes);
+ printf("LSM6DSL acc: %7ld x, %7ld y, %7ld z [mg] \r\n", axes[0], axes[1], axes[2]);
+ sen_acc_gyro.get_g_axes(axes);
+ printf("LSM6DSL gyro: %7ld x, %7ld y, %7ld z [mdps] \r\n", axes[0], axes[1], axes[2]);
- // if (range.get_distance(&distance) == VL53L0X_ERROR_NONE) {
- // printf("VL53L0X [mm]: %6ld\r\n", distance);
+ // if (range.get_distance(&uval) == VL53L0X_ERROR_NONE) {
+ // printf("VL53L0X [mm]: %6ld\r\n", uval);
// if (endpointInfo) {
- // distance_res->set_value((int)distance);
+ // res_distance->set_value((int)uval);
// }
// } else {
// printf("VL53L0X [mm]: --\r\n");
// }
- printf("\033[7A");
+ printf("\033[6A");
}
#endif /* SENSORS_AND_BUTTONS */
@@ -257,34 +261,34 @@
}
// Creating resources, which can be written or read from the cloud
- button_res = client.create_resource("3200/0/5501", "button_count");
- button_res->set_value(0);
- button_res->methods(M2MMethod::GET);
- button_res->observable(true);
- button_res->attach_notification_callback(button_callback);
+ res_button = client.create_resource("3200/0/5501", "button_count");
+ res_button->set_value(0);
+ res_button->methods(M2MMethod::GET);
+ res_button->observable(true);
+ res_button->attach_notification_callback(button_callback);
#ifdef SENSORS_AND_BUTTONS
// Sensor resources
- temperature_res = client.create_resource("3303/0/5700", "temperature");
- temperature_res->set_value(0);
- temperature_res->methods(M2MMethod::GET);
- temperature_res->observable(true);
+ res_temperature = client.create_resource("3303/0/5700", "temperature");
+ res_temperature->set_value(0);
+ res_temperature->methods(M2MMethod::GET);
+ res_temperature->observable(true);
- humidity_res = client.create_resource("3304/0/5700", "humidity");
- humidity_res->set_value(0);
- humidity_res->methods(M2MMethod::GET);
- humidity_res->observable(true);
+ res_humidity = client.create_resource("3304/0/5700", "humidity");
+ res_humidity->set_value(0);
+ res_humidity->methods(M2MMethod::GET);
+ res_humidity->observable(true);
- // distance_res = client.create_resource("3330/0/5700", "distance");
- // distance_res->set_value(0);
- // distance_res->methods(M2MMethod::GET);
- // distance_res->observable(true);
+ // res_distance = client.create_resource("3330/0/5700", "distance");
+ // res_distance->set_value(0);
+ // res_distance->methods(M2MMethod::GET);
+ // res_distance->observable(true);
#endif /* SENSORS_AND_BUTTONS */
- // led_res = client.create_resource("3201/0/5853", "led_state");
- // led_res->set_value(1);
- // led_res->methods(M2MMethod::GET | M2MMethod::PUT);
- // led_res->attach_put_callback(led_put_callback);
+ // res_led = client.create_resource("3201/0/5853", "led_state");
+ // res_led->set_value(1);
+ // res_led->methods(M2MMethod::GET | M2MMethod::PUT);
+ // res_led->attach_put_callback(led_put_callback);
printf("Initialized Pelion Client. Registering...\n");
@@ -294,6 +298,11 @@
// Register with Pelion DM
client.register_and_connect();
+ int i = 600; // wait 60 seconds
+ while (i-- > 0 && !client.is_client_registered()) {
+ wait_ms(100);
+ }
+
// Placeholder for callback to update local resource when GET comes.
// The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
#ifdef SENSORS_AND_BUTTONS