Differences
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iothings:laboratoare:2022:lab7 [2023/11/20 21:37] dan.tudose [Sparrow BLE Service] |
iothings:laboratoare:2022:lab7 [2023/11/20 22:15] (current) dan.tudose [Web BLE Application] |
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| Line 127: | Line 127: | ||
| #include <BLEUtils.h> | #include <BLEUtils.h> | ||
| #include <BLE2902.h> | #include <BLE2902.h> | ||
| - | #include <Adafruit_Sensor.h> | + | #include "Zanshin_BME680.h" |
| - | #include <Adafruit_BME280.h> | + | |
| //BLE server name | //BLE server name | ||
| - | #define bleServerName "ESP32_BME280" | + | #define bleServerName "Sparrow_BME680" |
| // Default UUID for Environmental Sensing Service | // Default UUID for Environmental Sensing Service | ||
| Line 151: | Line 150: | ||
| // Create a sensor object | // Create a sensor object | ||
| - | Adafruit_BME280 bme; | + | BME680_Class BME680; |
| - | + | ||
| - | // Init BME280 | + | |
| - | void initBME(){ | + | |
| - | if (!bme.begin(0x76)) { | + | |
| - | Serial.println("Could not find a valid BME280 sensor, check wiring!"); | + | |
| - | while (1); | + | |
| - | } | + | |
| - | } | + | |
| bool deviceConnected = false; | bool deviceConnected = false; | ||
| Line 180: | Line 171: | ||
| // Start BME sensor | // Start BME sensor | ||
| - | initBME(); | + | while (!BME680.begin(I2C_STANDARD_MODE)) { // Start BME680 using I2C, use first device found |
| + | Serial.print(F("- Unable to find BME680. Trying again in 5 seconds.\n")); | ||
| + | delay(5000); | ||
| + | } // of loop until device is located | ||
| + | Serial.print(F("- Setting 16x oversampling for all sensors\n")); | ||
| + | BME680.setOversampling(TemperatureSensor, Oversample16); // Use enumerated type values | ||
| + | BME680.setOversampling(HumiditySensor, Oversample16); // Use enumerated type values | ||
| + | BME680.setOversampling(PressureSensor, Oversample16); // Use enumerated type values | ||
| + | Serial.print(F("- Setting IIR filter to a value of 4 samples\n")); | ||
| + | BME680.setIIRFilter(IIR4); // Use enumerated type values | ||
| + | Serial.print(F("- Setting gas measurement to 320\xC2\xB0\x43 for 150ms\n")); // "degC" symbols | ||
| + | BME680.setGas(320, 150); // 320 deg.C for 150 milliseconds | ||
| // Create the BLE Device | // Create the BLE Device | ||
| Line 212: | Line 214: | ||
| void loop() { | void loop() { | ||
| if (deviceConnected) { | if (deviceConnected) { | ||
| - | // Read temperature as Celsius (the default) | + | |
| - | float t = bme.readTemperature(); | + | static int32_t temp, hum, pres, gas; // BME readings |
| - | // Read humidity | + | |
| - | float h = bme.readHumidity(); | + | BME680.getSensorData(temp, hum, pres, gas); // Get readings |
| - | // Read pressure | + | |
| - | float p = bme.readPressure()/100.0F; | + | float t = (float)((int8_t)(temp / 100)); |
| + | t += (float)((uint8_t)(temp % 100))/100.0; | ||
| + | |||
| + | float h = (float)((int8_t)(hum / 1000)); | ||
| + | h += (float)((uint16_t)(hum % 1000)))/1000.0; | ||
| + | |||
| + | float p = (float)((int16_t)(pres / 100)); | ||
| + | p += (float)((uint8_t)(pres % 100))/100.0; | ||
| | | ||
| //Notify temperature reading | //Notify temperature reading | ||
| Line 251: | Line 260: | ||
| </code> | </code> | ||
| + | Upload the code to your board. After uploading, open the Serial Monitor, and restart the Sparrow by pressing the RST/EN button. | ||
| + | |||
| + | You should get a //"Waiting a client connection to notify..."// message in the Serial Monitor. | ||
| + | |||
| + | Then, go to your smartphone, open the nRF Connect app from Nordic, and start scanning for new devices. You should find a device called **Sparrow_BME680**, this is the BLE server name you defined earlier. | ||
| + | |||
| + | Connect to it. You’ll see that it displays the Environmental Sensing service with the temperature, humidity, and pressure characteristics. Click on the down arrows to activate the notifications. | ||
| + | |||
| + | Then, click on the second icon (the one that looks like a " mark) at the left to change the format. You can change to unsigned int for all characteristics. You’ll start seeing the temperature, humidity, and pressure values being reported every 10 seconds. | ||
| + | |||
| + | ===== Web BLE Application ===== | ||
| + | |||
| + | Follow the tutorial [[https://randomnerdtutorials.com/esp32-web-bluetooth/| here]] to learn how to create a Web application that connects directly to your Sparrow ESP32 board. You can use the web app just like a normal phone application to send and receive information over BLE from your device. | ||
| + | |||
| + | <note important>Web BLE is not currently supported by iOS phones </note> | ||
| + | |||
| + | Build the application in the tutorial and deploy the web page in your GitHub account. | ||
| + | |||
| + | === Assignment === | ||
| + | <note> Modify the web page and the BLE app to display the BME680 sensor data (temperature, pressure and humidity). </note> | ||
