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:
- 17:fc98adcf835a
- Parent:
- 16:70374ab2404f
- Child:
- 20:a9aab92d378b
--- a/main.cpp Tue Dec 11 00:25:58 2018 +0000
+++ b/main.cpp Sun Dec 16 13:29:53 2018 +0000
@@ -92,7 +92,7 @@
* @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", res_led->get_value().c_str());
+ printf("POST received. Payload: %s\n", res_led->get_value().c_str());
led = atoi(res_led->get_value().c_str());
}
@@ -119,7 +119,7 @@
* @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
*/
void registered(const ConnectorClientEndpointInfo *endpoint) {
- printf("Connected to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
+ printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
endpointInfo = endpoint;
}
@@ -144,18 +144,18 @@
sen_acc_gyro.enable_g();
printf("\033[2J\033[20A");
- printf ("\r\nSensors configuration:\r\n");
+ printf ("\nSensors configuration:\n");
sen_hum_temp.read_id(&id);
- printf("HTS221 humidity & temperature = 0x%X\r\n", id);
+ printf("HTS221 humidity & temperature = 0x%X\n", id);
sen_press_temp.read_id(&id);
- printf("LPS22HB pressure & temperature = 0x%X\r\n", id);
+ printf("LPS22HB pressure & temperature = 0x%X\n", id);
sen_mag.read_id(&id);
- printf("LIS3MDL magnetometer = 0x%X\r\n", id);
+ printf("LIS3MDL magnetometer = 0x%X\n", id);
sen_acc_gyro.read_id(&id);
- printf("LSM6DSL accelerometer & gyroscope = 0x%X\r\n", id);
+ printf("LSM6DSL accelerometer & gyroscope = 0x%X\n", id);
- printf("\r\n"); ;
+ printf("\n"); ;
}
/**
@@ -167,12 +167,12 @@
int32_t axes[3];
uint32_t uval;
- printf("\r\n");
+ printf("\n");
fval1 = fval2 = 0.0;
sen_hum_temp.get_humidity(&fval1);
sen_hum_temp.get_temperature(&fval2);
- printf("HTS221 temp: %7.2f C, humidity: %7.2f %%\r\n", fval1, fval2);
+ printf("HTS221 temp: %7.2f C, humidity: %7.2f %%\n", fval1, fval2);
if (endpointInfo) {
res_humidity->set_value(fval1);
res_temperature->set_value(fval2);
@@ -181,7 +181,7 @@
fval1 = fval2 = 0.0;
sen_press_temp.get_pressure(&fval1);
sen_press_temp.get_temperature(&fval2);
- printf("LPS22HB temp: %7.2f C, pressure: %7.2f mbar \r\n", fval1, fval2);
+ printf("LPS22HB temp: %7.2f C, pressure: %7.2f mbar \n", fval1, fval2);
#ifdef SEND_ALL_SENSORS
if (endpointInfo) {
res_pressure->set_value(fval1);
@@ -190,13 +190,13 @@
#endif /* SEND_ALL_SENSORS */
sen_mag.get_m_axes(axes);
- printf("LIS3MDL mag: %7ld x, %7ld y, %7ld z [mgauss] \r\n", axes[0], axes[1], axes[2]);
+ printf("LIS3MDL mag: %7ld x, %7ld y, %7ld z [mgauss] \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]);
+ printf("LSM6DSL acc: %7ld x, %7ld y, %7ld z [mg] \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]);
+ printf("LSM6DSL gyro: %7ld x, %7ld y, %7ld z [mdps] \n", axes[0], axes[1], axes[2]);
#ifdef SEND_ALL_SENSORS
if (endpointInfo) {
res_gyroscope_x->set_value((float)axes[0]);
@@ -206,12 +206,12 @@
#endif /* SEND_ALL_SENSORS */
// if (sen_distance.get_distance(&uval) == VL53L0X_ERROR_NONE) {
-// printf("VL53L0X [mm]: %6ld\r\n", uval);
+// printf("VL53L0X [mm]: %6ld\n", uval);
// #ifdef SEND_ALL_SENSORS
// if (endpointInfo) res_distance->set_value((float)uval);
// #endif /* SEND_ALL_SENSORS */
// } else {
-// printf("VL53L0X [mm]: --\r\n");
+// printf("VL53L0X [mm]: --\n");
// #ifdef SEND_ALL_SENSORS
// if (endpointInfo) res_distance->set_value(99999.9);
// #endif /* SEND_ALL_SENSORS */
@@ -221,11 +221,16 @@
}
int main(void) {
- printf("Starting Simple Pelion Device Management Client example\n");
+ printf("\nStarting Simple Pelion Device Management Client example\n");
// If the User button is pressed ons start, then format storage.
+ DigitalIn *user_button = new DigitalIn(BUTTON1);
+#if TARGET_DISCO_L475VG_IOT01A
+ // The user button on DISCO_L475VG_IOT01A works the other way around
const int PRESSED = 0;
- DigitalIn *user_button = new DigitalIn(BUTTON1);
+#else
+ const int PRESSED = 1;
+#endif
if (user_button->read() == PRESSED) {
printf("User button is pushed on start. Formatting the storage...\n");
int storage_status = fs.reformat(&sd);
@@ -265,6 +270,8 @@
printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
+ printf("Initializing Pelion Device Management Client...\n");
+
// SimpleMbedCloudClient handles registering over LwM2M to Pelion DM
SimpleMbedCloudClient client(net, bd, &fs);
int client_status = client.init();
@@ -336,7 +343,7 @@
// Register with Pelion DM
client.register_and_connect();
- int i = 600; // wait 60 seconds
+ int i = 600; // wait up 60 seconds before attaching sensors and button events
while (i-- > 0 && !client.is_client_registered()) {
wait_ms(100);
}