How to equip Spresense with Bluetooth Low Energy (BLE)
Connectivity based on Bluetooth Low Energy (BLE) is ideal when only local connectivity is needed and the amount of data to be transferred is limited and only sent periodically. This connectivity option consumes very little power.
To equip the Spresense development board with BLE, we simply plug the add-on board (created by Rohm) onto the main board of Spresense.
In this tutorial we'll be doing a simple serial communications test using BLE. Here is the list of components we'll use in the steps below:
- Spresense main board
- BLE add-on board (made by Rohm)
- A USB micro cable
- A smartphone
Note: To use the UART pins on the main board when attached to the extension board, connect a 2.54mm pitch jumper to pin 1 and 2 on JP10 of the extension board to disable the extension board UART. For more details see How to use the UART.