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:
- 28:0e774865873d
- Parent:
- 20:a9aab92d378b
- Child:
- 29:6ff737b67e7d
--- a/main.cpp Tue Dec 18 23:51:31 2018 +0000
+++ b/main.cpp Mon Mar 04 22:11:02 2019 +0000
@@ -15,7 +15,9 @@
// See the License for the specific language governing permissions and
// limitations under the License.
// ----------------------------------------------------------------------------
+
#ifndef MBED_TEST_MODE
+
#include "mbed.h"
#include "simple-mbed-cloud-client.h"
#include "LittleFileSystem.h"
@@ -23,18 +25,18 @@
#include "LPS22HBSensor.h"
#include "LSM6DSLSensor.h"
#include "lis3mdl_class.h"
-// #include "VL53L0X.h"
+#include "VL53L0X.h"
static DevI2C devI2c(PB_11,PB_10);
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 sen_distance(&devI2c, &shutdown_pin, PC_7);
+static DigitalOut shutdown_pin(PC_6);
+static VL53L0X sen_distance(&devI2c, &shutdown_pin, PC_7);
#define SENSORS_POLL_INTERVAL 1.0
-//#define SEND_ALL_SENSORS
+#define SEND_ALL_SENSORS
// An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
// This is great because things such as network operations are illegal in ISR, so updating a resource in a button's fall() function is not allowed
@@ -57,18 +59,31 @@
MbedCloudClientResource *res_button;
MbedCloudClientResource *res_led;
+#ifdef SEND_ALL_SENSORS
+// Temperature reading from microcontroller
+AnalogIn adc_temp(ADC_TEMP);
+// Voltage reference reading from microcontroller
+AnalogIn adc_vref(ADC_VREF);
+#endif
+
// Additional resources for sensor readings
MbedCloudClientResource *res_humidity;
MbedCloudClientResource *res_temperature;
#ifdef SEND_ALL_SENSORS
MbedCloudClientResource *res_pressure;
MbedCloudClientResource *res_temperature2;
-MbedCloudClientResource *res_magnometer;
-MbedCloudClientResource *res_accelerometer;
+MbedCloudClientResource *res_magnometer_x;
+MbedCloudClientResource *res_magnometer_y;
+MbedCloudClientResource *res_magnometer_z;
+MbedCloudClientResource *res_accelerometer_x;
+MbedCloudClientResource *res_accelerometer_y;
+MbedCloudClientResource *res_accelerometer_z;
MbedCloudClientResource *res_gyroscope_x;
MbedCloudClientResource *res_gyroscope_y;
MbedCloudClientResource *res_gyroscope_z;
MbedCloudClientResource *res_distance;
+MbedCloudClientResource *res_adc_temp;
+MbedCloudClientResource *res_adc_voltage;
#endif /* SEND_ALL_SENSORS */
// When the device is registered, this variable will be used to access various useful information, like device ID etc.
@@ -102,7 +117,7 @@
void button_press() {
int v = res_button->get_value_int() + 1;
res_button->set_value(v);
- printf("Button clicked %d times\n", v);
+ printf("Button clicked %d times \n", v);
}
/**
@@ -134,7 +149,7 @@
sen_press_temp.init(NULL);
sen_acc_gyro.init(NULL);
sen_mag.init(NULL);
- // sen_distance.init_sensor(VL53L0X_DEFAULT_ADDRESS);
+ sen_distance.init_sensor(VL53L0X_DEFAULT_ADDRESS);
/// Call sensors enable routines
sen_hum_temp.enable();
@@ -163,76 +178,66 @@
* This function is called periodically.
*/
void sensors_update() {
- float fval1, fval2;
- int32_t axes[3];
- uint32_t uval;
+ float t1_val, t2_val, t3_val, h_val, p_val, v_val = 0.0;
+ int32_t m_axes[3], a_axes[3], g_axes[3];
+ uint32_t d_val, vl_res;
- printf("\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 %%\n", fval1, fval2);
- if (endpointInfo) {
- res_humidity->set_value(fval1);
- res_temperature->set_value(fval2);
+ sen_hum_temp.get_humidity(&h_val);
+ sen_hum_temp.get_temperature(&t1_val);
+ sen_press_temp.get_pressure(&p_val);
+ sen_press_temp.get_temperature(&t2_val);
+ sen_mag.get_m_axes(m_axes);
+ sen_acc_gyro.get_x_axes(a_axes);
+ sen_acc_gyro.get_g_axes(g_axes);
+ vl_res = sen_distance.get_distance(&d_val);
+ t3_val = adc_temp.read()*100;
+ v_val = adc_vref.read();
+
+ printf("ADC temp: %5.4f C, vref: %5.4f V \n", t3_val, v_val);
+ printf("HTS221 temp: %7.2f C, humidity: %7.2f %% \n", t1_val, h_val);
+ printf("LPS22HB temp: %7.2f C, pressure: %7.2f mbar \n", t2_val, p_val);
+ printf("LIS3MDL mag: %7ld x, %7ld y, %7ld z [mgauss] \n", m_axes[0], m_axes[1], m_axes[2]);
+ printf("LSM6DSL acc: %7ld x, %7ld y, %7ld z [mg] \n", a_axes[0], a_axes[1], a_axes[2]);
+ printf("LSM6DSL gyro: %7ld x, %7ld y, %7ld z [mdps] \n", g_axes[0], g_axes[1], g_axes[2]);
+ if (vl_res == VL53L0X_ERROR_NONE) {
+ printf("VL53L0X dist: %7ld [mm]\n", d_val);
+ } else {
+ printf("VL53L0X dist: -- \n");
}
- 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 \n", fval1, fval2);
-#ifdef SEND_ALL_SENSORS
+ printf("\r\033[8A");
+
if (endpointInfo) {
- res_pressure->set_value(fval1);
- res_temperature2->set_value(fval2);
- }
-#endif /* SEND_ALL_SENSORS */
-
- sen_mag.get_m_axes(axes);
- 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] \n", axes[0], axes[1], axes[2]);
-
- sen_acc_gyro.get_g_axes(axes);
- printf("LSM6DSL gyro: %7ld x, %7ld y, %7ld z [mdps] \n", axes[0], axes[1], axes[2]);
+ res_humidity->set_value(h_val);
+ res_temperature->set_value(t1_val);
#ifdef SEND_ALL_SENSORS
- if (endpointInfo) {
- res_gyroscope_x->set_value((float)axes[0]);
- res_gyroscope_y->set_value((float)axes[1]);
- res_gyroscope_z->set_value((float)axes[2]);
- }
+ res_pressure->set_value(p_val);
+ res_temperature2->set_value(t2_val);
+ res_magnometer_x->set_value((float)m_axes[0]);
+ res_magnometer_y->set_value((float)m_axes[1]);
+ res_magnometer_z->set_value((float)m_axes[2]);
+ res_accelerometer_x->set_value((float)a_axes[0]);
+ res_accelerometer_y->set_value((float)a_axes[1]);
+ res_accelerometer_z->set_value((float)a_axes[2]);
+ res_gyroscope_x->set_value((float)g_axes[0]);
+ res_gyroscope_y->set_value((float)g_axes[1]);
+ res_gyroscope_z->set_value((float)g_axes[2]);
+ res_distance->set_value((float)d_val);
+ res_adc_temp->set_value(t3_val);
+ res_adc_voltage->set_value(v_val);
#endif /* SEND_ALL_SENSORS */
-
-// if (sen_distance.get_distance(&uval) == VL53L0X_ERROR_NONE) {
-// 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]: --\n");
-// #ifdef SEND_ALL_SENSORS
-// if (endpointInfo) res_distance->set_value(99999.9);
-// #endif /* SEND_ALL_SENSORS */
-// }
-
- printf("\033[6A");
+ }
}
int main(void) {
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;
-#else
- const int PRESSED = 1;
-#endif
- if (user_button->read() == PRESSED) {
+ if (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE) {
printf("User button is pushed on start. Formatting the storage...\n");
+ bd->erase(0, bd->size());
int storage_status = fs.reformat(&sd);
if (storage_status != 0) {
if (sd.erase(0, sd.size()) == 0) {
@@ -245,6 +250,8 @@
if (storage_status != 0) {
printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
}
+ } else {
+ printf("You can hold the user button during boot to format the storage and change the device identity.\n");
}
sensors_init();
@@ -299,33 +306,73 @@
res_humidity->observable(true);
#ifdef SEND_ALL_SENSORS
- res_pressure = client.create_resource("3323/1/5700", "pressure");
- res_pressure->set_value(0);
- res_pressure->methods(M2MMethod::GET);
- res_pressure->observable(true);
-
res_temperature2 = client.create_resource("3303/1/5700", "temperature");
res_temperature2->set_value(0);
res_temperature2->methods(M2MMethod::GET);
res_temperature2->observable(true);
- res_gyroscope_x = client.create_resource("3334/1/5702", "gyroscope_x");
+ res_adc_temp = client.create_resource("3303/2/5700", "temperature");
+ res_adc_temp->set_value(0);
+ res_adc_temp->methods(M2MMethod::GET);
+ res_adc_temp->observable(true);
+
+ res_accelerometer_x = client.create_resource("3313/0/5702", "accelerometer_x");
+ res_accelerometer_x->set_value(0);
+ res_accelerometer_x->methods(M2MMethod::GET);
+ res_accelerometer_x->observable(true);
+
+ res_accelerometer_y = client.create_resource("3313/0/5703", "accelerometer_y");
+ res_accelerometer_y->set_value(0);
+ res_accelerometer_y->methods(M2MMethod::GET);
+ res_accelerometer_y->observable(true);
+
+ res_accelerometer_z = client.create_resource("3313/0/5704", "accelerometer_z");
+ res_accelerometer_z->set_value(0);
+ res_accelerometer_z->methods(M2MMethod::GET);
+ res_accelerometer_z->observable(true);
+
+ res_magnometer_x = client.create_resource("3314/0/5702", "magnometer_x");
+ res_magnometer_x->set_value(0);
+ res_magnometer_x->methods(M2MMethod::GET);
+ res_magnometer_x->observable(true);
+
+ res_magnometer_y = client.create_resource("3314/0/5703", "magnometer_y");
+ res_magnometer_y->set_value(0);
+ res_magnometer_y->methods(M2MMethod::GET);
+ res_magnometer_y->observable(true);
+
+ res_magnometer_z = client.create_resource("3314/0/5704", "magnometer_z");
+ res_magnometer_z->set_value(0);
+ res_magnometer_z->methods(M2MMethod::GET);
+ res_magnometer_z->observable(true);
+
+ res_gyroscope_x = client.create_resource("3334/0/5702", "gyroscope_x");
res_gyroscope_x->set_value(0);
res_gyroscope_x->methods(M2MMethod::GET);
res_gyroscope_x->observable(true);
- res_gyroscope_y = client.create_resource("3334/1/5703", "gyroscope_y");
+ res_gyroscope_y = client.create_resource("3334/0/5703", "gyroscope_y");
res_gyroscope_y->set_value(0);
res_gyroscope_y->methods(M2MMethod::GET);
res_gyroscope_y->observable(true);
- res_gyroscope_z = client.create_resource("3334/1/5704", "gyroscope_z");
+ res_gyroscope_z = client.create_resource("3334/0/5704", "gyroscope_z");
res_gyroscope_z->set_value(0);
res_gyroscope_z->methods(M2MMethod::GET);
res_gyroscope_z->observable(true);
+ res_adc_voltage = client.create_resource("3316/0/5700", "voltage");
+ res_adc_voltage->set_value(0);
+ res_adc_voltage->methods(M2MMethod::GET);
+ res_adc_voltage->observable(true);
+
+ res_pressure = client.create_resource("3323/0/5700", "pressure");
+ res_pressure->set_value(0);
+ res_pressure->methods(M2MMethod::GET);
+ res_pressure->observable(true);
+
res_distance = client.create_resource("3330/0/5700", "distance");
- res_distance->set_value(0);
+ res_distance->set_value((float)999.9);
res_distance->methods(M2MMethod::GET);
res_distance->observable(true);
@@ -357,4 +404,5 @@
// You can easily run the eventQueue in a separate thread if required
eventQueue.dispatch_forever();
}
+
#endif