Previously, I’ve shown how to enable Bluetooth Low Energy (BLE) connections using Python. In the past few months, I have been furiously learning JavaScript for an upcoming set of tutorials dealing with the Intel® Edison. Along the way, I needed to make a demo using BLE and JavaScript, which invariably led me to the bleno module.
Bleno is a great tool, but I found some of the examples a little confusing to follow (I get easily lost when a program is split into more than 2 files without a well-documented API). As a result, I constructed a simple echo server demo program that illustrates how characteristics work in BLE.