# BLE - missing a Receive Callback Function on cross plataform

**URL:** <https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677>\
**Category:** Questions about Thunkable X\
**Tags:** bluetooth\
**Created:** [August 19, 2019, 7:15pm UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677 "2019-08-19T19:15:30Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Pedro\_Cavaglieri](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@Pedro\_Cavaglieri](https://community.thunkable.com/u/Pedro_Cavaglieri)\
**Post date:** [August 19, 2019, 7:15pm UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677/1 "2019-08-19T19:15:30Z")

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First of all, thank you for adding the Bluetooth\_Low\_Energy on the Cross plataform.

It works well for IOS and ANDROID, I’ve tested my APP communicating with the MCU ESP32 and I am very happy with the results.  
But one thing that is missing is a CALLBACK function for data receive. On my APP I had to create a timer that fires periodically and when it fires I call the receive function. It is not a good practice because I lose some packets. On my Classic APP I use the callback and I’ve never lost a packet.

It would be great if you add this callback function.

Thank you so much.

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**Author:** ![kufirre](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/kufirre/32/45596_2.png) [@kufirre](https://community.thunkable.com/u/kufirre)\
**Post date:** [October 24, 2019, 8:32am UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677/2 "2019-10-24T08:32:45Z")

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Hi Pedro,

Where you able to receive data from the ESP32 on iOS?

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**Author:** ![Pedro\_Cavaglieri](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@Pedro\_Cavaglieri](https://community.thunkable.com/u/Pedro_Cavaglieri)\
**Post date:** [January 3, 2021, 8:04pm UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677/3 "2021-01-03T20:04:52Z")

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Yes, I had no problem with it

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**Author:** ![ats378847hmzi](https://avatars.discourse-cdn.com/v4/letter/a/c37758/32.png) [@ats378847hmzi](https://community.thunkable.com/u/ats378847hmzi)\
**Post date:** [February 4, 2021, 11:49am UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677/4 "2021-02-04T11:49:39Z")

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So there will be no Callback Function that is sad. How Pedro wrote with a timer is a poor way to do it.

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**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\
**Post date:** [November 8, 2024, 12:08pm UTC](https://community.thunkable.com/t/ble-missing-a-receive-callback-function-on-cross-plataform/187677/5 "2024-11-08T12:08:33Z")

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