Bravo: An Evaluation Kit for Cellular LPWA

The example program leverages most hardware building blocks embedded in the Bravo board: 

• The ME910 modem, supporting GSM, NB-IoT and Cat M1 cellular technologies  
• A GNSS receiver embedded in the ME910 module  
• Bosch environmental sensors (temperature, acceleration)  
• LEDs 

The application is ideal for demonstrating the board’s features and capabilities. You can use it to begin developing a tracker with environmental sensors and a user-activated alarm. 

Furthermore, the application loads data to the OneEdge cloud, allowing the user to display device position and environmental data. 

The application uses the following software components: 

• Arduino ME310 library: This function set makes module configuration and usage easier. It avoids direct use of AT commands to interact with the cellular module. Please note that, despite its name, it is suitable to control ME310 and ME910 modules. 
• Custom AT command (AT#BSENS): The BSENS command was developed using the IoT AppZone. To be available in the device, this command requires an AppZone binary to be downloaded on the ME910 module, as described in the application notes. 

The application performs the following tasks: 

• ME910 modem setup with GNSS enabled 
• BHI160 and BME680 sensors setup: They are connected to the ME910 I2C bus and controlled through the BSENS AT command 

Once the peripherals are ready, the example application will cycle between the following operations: 

• Button status read: The application will start or stop tracking if the button has been pressed. 
• Sensor read: It will retrieve the temperature, humidity, pressure values and acceleration events. Maximums and variations are also recorded and uploaded to the cloud.   
• Data sending: Environmental data is sent to the OneEdge server with positioning information. 

Before running the application, please ensure the following steps are completed: 

1. Connect the Bravo board to the Arduino Zero board with the Berg connectors  
2. Connect a temporary pushbutton to the Arduino board GPIO, as described in detail in the application notes  
3. Check and update the ME910C1 firmware if necessary 
4. Download and install the BSENS application on the ME910C1 to handle Bosch sensors through the provided custom AT command 
5. Set up the IoT Portal on OneEdge and import thing definitions  
6. Configure the Arduino source code with your SIM card’s APN and the GPIO used to handle the external pushbutton 

SIM card requirements: 

• Please note that not all SIM cards are suitable for NB-IoT and Cat M1 networks. If your SIM is not enabled for these technologies, the modem will camp on a GSM network as a fallback if available. 
• Please check with your provider if the SIM card has a number associated with it and can send SMS messages. If in doubt, insert it in a cellular phone and try sending an SMS.