Bluetooth Low Energy

Description
Bluetooth Low Energy, or BLE, is used to wirelessly connect two devices to one another. The BLE component allows you to find and connect to BLE devices and to communicate directly with them.
BLE functionality can't be tested with the Thunkable Live app on iOS. 
To test the BLE functionality in your app on iOS, please download your app.
Add a Bluetooth component to Thunkable
To add a Bluetooth component to your app:
Go to your Blocks tab
Find the Advanced drawer of blocks. Click the drop-down menu icon to show the Advanced invisible components
Click the ⊕ icon next to the Bluetooth drawer
You will see a dialog to create your Bluetooth component. Click Submit to create the component, or Delete to dismiss the dialog without creating the component.
Deleting your Bluetooth Component
Once you have added at least one Bluetooth component to your app, you will be able to view all of your Bluetooth components under the Bluetooth drawer in the Advanced section of the Blocks tab. 
To delete a Bluetooth component, click on the ⚙ icon next to the component's name to bring up the properties dialog and click Delete.
Functions
Version 1 of the BLE component in Thunkable ✕ contains 5 functions, each of which are documented in greater detail below.
​Scan​
​Connect to Device Id​
​Connect to Device Name​
​Receive​
​Transmit​
Scan
This function is used to scan for nearby BLE or Bluetooth enabled devices. Scanning happens for 10 seconds. Once scanning has successfully completed then a list of the available device ids and a list of available names will be returned. If the scanning function can not be completed then an error will be returned.
Parameter
Type
Description
Device Ids
List
Returns a list of the IDs of the available devices
Device Names
List
Returns a list of the names of the available devices
error
String
Returns an error message from the function
Connect to Device Id
The Connect to Device Id function allows your app to connect to a BLE enabled device based in the Id of that device.
Parameter
Type
Description
Device Id
String
Expects a text string with the device id you want to connect to
Device Name
String
Returns the name of the device you have just connected to
error
String
Returns an error message from the function
Connect to Device Name
When you know the name of the BLE device that you want to connect to you can use the Connect to Device Name block to connect directly to it. Please note that device names are not unique and it is relatively easy to change the name of a BLE device.
Parameter
Type
Description
Device Name
String
Expects a text block with the name of the device to connect to
Device Id
String
Returns the Id of the device that you have just connected to
error
String
Returns an error message from the function
Receive
If you have a BLE device that is capable of sending data to another device then you will need to use the Receive function in your app in order to listen to, or receive, data coming from the BLE device.
You need to be connected to another Bluetooth device in order to use this block.
You can receive a String or a Byte Array.
Parameter
Type
Description
characteristic UUID
String
Expects a text block with a 32-bit UUID for the BLE type, service or profile required
data
String
Returns a string containing the information received from the BLE device
error
String
Returns an error message from the function
Transmit
Should you need to send data to a BLE device then you can use the Transmit function to send that information. 
You need to be connected to another Bluetooth device in order to use this block.
You can transmit a String or a Byte Array.
Parameter
Type
Description
characteristic UUID
String
Expects a text block with a 32-bit UUID for the BLE type, service or profile required
data
String
Expects a text block with the message that you want to send to your BLE device
error
String
Returns an error message from the function
Disconnect
If connected to another Bluetooth device, this block will disconnect your app from the device.

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Outline

Description

Add a Bluetooth component to Thunkable

Deleting your Bluetooth Component

Functions

Scan

Connect to Device Id

Connect to Device Name

Receive

Transmit

Disconnect