Connecting Waspmote to a smartphone
Last updated
Last updated
It is also possible to connect a smartphone (compatible with the Bluetooth 4.0 standard) with the BLE module using one of the multiple commercial applications available. With them, it is easy to scan and connect to the BLE module, and perform the basic operations on the characteristics defined in the BLE module profile.
In this guide, the app \"Light blue\" is used for iOS, and the app \"nRF Master control\" is used for Android, but similar apps can be used to perform same actions. Both can be found in respective app markets.
NOTE: During the next sections we will see examples of applications that can be used to get sensor data sent directly by Waspmote + BLE module to the smartphone. However, the final idea is that the Developer programs his own app so that the information can be stored and shown as desired. The next sections are shown as a quick proof of concept of the capabilities of this technology.
Scanning for BLE devices
It is easy to scan other BLE modules by pressing the scan button. Each scanned device shows its MAC address and the RSSI. Be sure that the slave is visible and connectable by your smartphone, as described in previous sections.
Connecting to a BLE device
When the desired BLE module is found, it can be connected. The smartphone will be the master and the BLE module will become the slave.
Receiving data from a remote BLE device
If the connection is established successfully, now the user can navigate through the profile of the slave.
If the characteristic is readable, the user can easily access to the value of the characteristic.
Sending data to a remote BLE device
If the characteristic is writable, then the user can enter a new value and write it onto the characteristic.
Subscribing to a characteristic
If the characteristic is notifiable, the user can subscribe to it to know when it changes.
Once the smartphone is subscribed, the value of the characteristic will be updated in the smartphone every time it is changed by the slave.
