UF Smart Devices

Embedded

Full Software design here

We made a breadboard using various components like a LoRa UART RN2483A, an SSD1306 I2C Screen and a Gaz Sensor MQ5 from Seeed Studio. The goal would be to communicate using the LoRa chip to ChirpStack by sending the sensor data directly to the gateway. We decided to use an ESP32 for this project, because it has a wide variety of pins that can be dynamic allocated on each gpio. Plus, espidf is a framework we are familiar with.

Hardware

Full LTSpice simulation and EasyEDA design here

The goal in this part would be to create a fully working PCB with everything we designed so far. Our own gaz sensor will be used. The first step would be to emulate on LTSpice the behavior of such a sensor. With this we can then design a board with the correct schematic on EasyEDA.

Node Red

Full Node-Red setup here

We would need to create a node-red flow to actually gather the data and show it on a dashboard. To do this we would have to connect using a MQTT Broker, Chirpstack has the ability to resend, via a given topic the data gathered by the device.

App Inventor

Using the AppInventor we have designed a mobile application that can directly communicate with a bluetooth receiver and power on a LED. You can see the application from the files as well as the source file for the embedded part.