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iothings:proiecte:2022sric:weatherly-local-station [2023/06/01 20:51] andreea.miu [Arduino code] |
iothings:proiecte:2022sric:weatherly-local-station [2023/06/01 21:45] (current) andreea.miu [Introduction] |
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| The purpose of this project is to provide a proof-of-concept for adding local weather stations to standard weather applications, in order to have a more granular approach on weather based on customizable location and measured data. | The purpose of this project is to provide a proof-of-concept for adding local weather stations to standard weather applications, in order to have a more granular approach on weather based on customizable location and measured data. | ||
| + | I have also uploaded this project on [[https://github.com/miuAndreea/Weatherly|Github]], for easier access to the full code and to provide the possibility of testing and reproducing the application. | ||
| + | |||
| + | ===== Project demo ===== | ||
| + | |||
| + | A demo video of the application running can be found at the following [[https://drive.google.com/file/d/1CsQ8dCcg7jKgNMY-_ueiRhcQsAjqJyS8/view|link]]. | ||
| ===== Hardware Setup ===== | ===== Hardware Setup ===== | ||
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| * SDI/SDA of BME280 - IO21 / GPIO pin 21 of ESP32 (default GPIO ppin for I2C SDA) | * SDI/SDA of BME280 - IO21 / GPIO pin 21 of ESP32 (default GPIO ppin for I2C SDA) | ||
| + | ==== Physical setup ==== | ||
| + | The physical setup is easily reproducible. This allows for scalability if creating multiple local weather stations is desired. The BME280 sensor used comes with female-to-male jumper wires that form a connection port suitable for the sensor. The female end of each wire can be connected to the ESP32 board pins, according to the schematics described above. | ||
| + | |||
| + | {{weatherly-fizic.jpeg?500 |}} | ||
| ===== Software Setup ===== | ===== Software Setup ===== | ||
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| ==== Arduino code ==== | ==== Arduino code ==== | ||
| - | The Arduino code consists of a few key elements used, from both a Firebase connection perspective, and a BME280 sensor perspective. The full code can be found at the Github link provided in the references section. | + | The Arduino code consists of a few key elements used, from both a Firebase connection perspective, and a BME280 sensor perspective. The full code can be found on [[https://github.com/miuAndreea/Weatherly/|this]] Github repository. |
| In order to measure altitude correctly, BME280 needs a reference pressure for sea level: | In order to measure altitude correctly, BME280 needs a reference pressure for sea level: | ||
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| The Android application used is part of a larger project, which also provides access to global weather forecast using an API. By using the data collected by the BME280 sensor and stored in the Firebase database, the granularity of data (across a city, for example) is increased. The screenshots below illustrate how the app can be navigated in order to access the local weather station in Bucharest. A different forecast can also be retrieved for Bucharest using the API, thus providing two points of data collection in Bucharest. | The Android application used is part of a larger project, which also provides access to global weather forecast using an API. By using the data collected by the BME280 sensor and stored in the Firebase database, the granularity of data (across a city, for example) is increased. The screenshots below illustrate how the app can be navigated in order to access the local weather station in Bucharest. A different forecast can also be retrieved for Bucharest using the API, thus providing two points of data collection in Bucharest. | ||
| + | For developing the application, I used Android Studio, and Java as the programming language. | ||
| + | |||
| + | After configuring the connection to Firebase using Android Studio's Firebase plugin, the nodes and values of the nodes can be retrieved in real-time using a //ValueEventListener//. For example, getting the temperature value and showing it in a //TextView// can be done in the below manner: | ||
| + | |||
| + | <code> | ||
| + | databaseReference = FirebaseDatabase.getInstance().getReference(); | ||
| + | |||
| + | // Event listener | ||
| + | databaseReference.addValueEventListener( | ||
| + | new ValueEventListener() { | ||
| + | @Override | ||
| + | public void onDataChange(@NonNull DataSnapshot snapshot) { | ||
| + | temp_val = | ||
| + | snapshot.child("temperature").getValue(Float.class); | ||
| + | temperatureTxt.setText(temp_val.toString() + "°C"); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | The full application can be viewed using [[https://github.com/miuAndreea/Weatherly/|this link]]. Below are some screenshots that illustrate how to navigate the app for viewing information from the local weather station. | ||
| {{ weatherly-app-1.png?500 |}} | {{ weatherly-app-1.png?500 |}} | ||
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| ===== References ===== | ===== References ===== | ||
| * https://easyeda.com/editor | * https://easyeda.com/editor | ||
| + | * https://github.com/miuAndreea/Weatherly/ | ||
| + | * https://www.waveshare.com/bme280-environmental-sensor.htm | ||
| + | * https://ocw.cs.pub.ro/courses/iothings/laboratoare/2022/lab4 | ||
| + | * https://ocw.cs.pub.ro/courses/smd | ||
| + | * https://firebase.google.com/docs/database/android/read-and-write | ||
