This tutorial is originally created by Vincent Dupuis.
My final project for the FabAcademy2016 is a bluetooth low energy (BLE) weather station with its associated smartphone (in my case iphone) app. In this page I summarize the different steps that have been required to obtained a fully functionnal prototype. More details can be found on the PROJECT DEVELOPMENT page. The general scheme is the following:
It consists of sensors (Temperature, Humidity, Pressure) sending data to a fabduino which itself sends the same data using bluetooth low energy (BLE) to a smartphone app. Here is the final result for the weather station:
and here is a screenshot of the smartphone app:
Of course with a bit more time I could have get rid of the cable, integrate the fabduino, the regulator, sensors and bluetooth transceiver on the same board but I chose to prioritize a functionnal prototype. Creating the smartphone app took also a very significant amount of time.
Video
Here is a video showing the prototype working with its app.
Bill Of Materials (BOM)
Sensors
- Grove Temperature and Humidity Sensor Pro - $14.90
- Grove Barometer (High-Accuracy) - $19.90
Bluetooth Low Energy Transceiver
- HM10 module - $9.90
Fabduino - Fabkit 0.4
The BOM in excel format can be found here.
Cables
- jumpers
- grove cables
Power
- 4 AAA rechargeable batteries
- battery casing
- LM7805 + 2 electrolytic capacitors 10 uF + 2 pin headers
Casing
- acrylic sheet 600 mm x 300 mm, 3 mm thick
Files
CAD
- Inkscape svg file final_project.svg
- OpenSCAD file final_project.scad
- Inkscape svg file final_project_box.svg
Fabduino
- Fabkit v0.4 Eagle schematic fabkit-v0.4.sch
- Fabkit v0.4 Eagle board layout fabkit-v0.4.brd
Regulator board
- KiCAD project file regulator.pro
- KiCAD schematic file regulator.sch
- KiCAD board file regulator.kicad_pcb.sch
Firmware and libraries
- Grove - Temperature and Humidity Sensor Pro library for the arduino IDE Humidity_Temperature_Sensor_pro.zip
- Grove - Barometer (High-Accuracy) library for the arduino IDE Grove_Barometer_HP20x-master.zip
- Firmware (arduino sketch) dht22_barometer_ble_bytes_fabduino_wo_serial.ino
Cordova app
- archive of www folder containins html, css and js files www.zip
Dissemination
This project is licensed under a Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.
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