### DESCRIPTION

Communication Module using XBEE and LoRa modules.

It uses an Arduino compatible microcontroller (STM32F103) which can be programmed using Arduino IDE as the board include a micro USB. This board is meant to be used in ambiental and IoT metering applications. It supports a lot of features such as solar panel, battery controller, GPS, pressure, temperature an even a Crypo authentication IC in applications that require more security when communicating in certains LoRa or XBEE network.

This node or gateway board can be mounted on top of a raspberry pi to act as the gateway instead of a standard remote node. This project was tested during a research project at PUCPR brazilian university.

The BOM is targeted to achieve a very low price, and to use all the MCU pins, for this reason the Layout is really beautiful.

### TECHNICAL DETAILS / COMPONENTS

• MCU STM32F103C8T6

• Barometric Pressure;

• Relative Air Humidity;

• Light Sensor (LUX);

• Temperature Sensor oC;

• Inflammable gas sensor (MQ-2);

• Conector for soil mosure sensor;

• Rain sensor Conector;

• Wind direction and speed sensors connectors;

• LoRa SX1278/Compatible Radio Connectivity

• XBEE Radio Connectivity;

• Crypto Authentication dedicated IC;

• Low power GPS/BDS included;

• Sleep mode allowing consption under 1mA

• Selection switch to allow GPS and XBEE configuration;

• Battery charger circuit fot 4.2V lition cell.

• Solar panel 12V switch circuit.

• Usb connection for easy programming and firmware debug.

• External Serial connection other boards communication.

• 1 Wire communicatino support (PJON SWBB).

• Status LED

### LEARN / TOPIC / BUILD INSTRUCTIONS

This project uses the board support package from Roger Clark: https://github.com/rogerclarkmelbourne/Arduino_STM32

See photos of the mounted board