Summary
This chapter explained an important feature of ESP32, BLE. BLE has many advantages over other wireless protocols. Probably the key advantage is the compatibility with mobile devices. Every mobile device manufacturer supports BLE in their designs, which eliminates the need for a separate gateway device to communicate with the sensor network. Therefore, it is super easy to develop impressive IoT products with powerful GUI applications for end users. Although BLE is a massive subject, we had a good start in this chapter by covering beacons, a standalone GATT server device, and setting up a BLE Mesh network for multiple IoT devices, which are extremely useful when local connectivity is needed.
In the next chapter, we will develop a full-fledged smart home by employing ESP32's networking capabilities.