How to send value to thunkable x app via ble using a rn4020

[H_i_CH_n_Nguy_n]

I am doing a project that use rn4020 ( a BLE microchip) with arduino and try to send data ( numeric) to thunkable x app. But i donnot know how to star
Can anyone show me how to get the uuid of rn4020: i try to use the ble scanner app but it return many uuid.
And please show me how to write the arduino code in which can send value to tunkable x app.
Thank all in advance

[domhnallohanlon]

Hey @H_i_CH_n_Nguy_n

You can try something like light blue to give you all the details about your BLE device(s)

BLE Characteristic UUID issues

I created an app: Thunkable This app is using BLE to talk to an HM-10 module on arduino. When I scan, I find my device. When I connect, it reports that it is connected. When I try to send a string I get the error: “Can’t write the characteristic provided”. I attached screen shots of my block, lightblue screen shot, error message. I used lightblue to find the Advertised Service UUIDs. Is that the correct ID?[SurfBleBlock] [image000000 (1)] [image000000]

Hope that helps!