# I tried to make app for transmit a message to Arduino using Bluetooth but bluetooth is not connecting and it not transmitting the message

**URL:** <https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436>\
**Category:** BLE / BlueTooth\
**Tags:** design, beginner, aia\
**Created:** [May 14, 2022, 6:35pm UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436 "2022-05-14T18:35:26Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![prajwalsunilkanse777](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@prajwalsunilkanse777](https://community.thunkable.com/u/prajwalsunilkanse777)\
**Post date:** [May 14, 2022, 6:35pm UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436/1 "2022-05-14T18:35:26Z")

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![Screenshot 2022-05-14 23.57.22](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/5/050d6f981aeebd07995af2b99e36127b7d7b822d.png)  
thats my block but it didnt connected and not transmitting??? any one help me?

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**Author:** ![jared](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/jared/32/138473_2.png) [@jared](https://community.thunkable.com/u/jared)\
**Post date:** [May 15, 2022, 3:18am UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436/2 "2022-05-15T03:18:33Z")

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Is that the name of your device as it appears in the scan label?

are you able. to see this device via [LightBlue](https://play.google.com/store/apps/details?id=com.punchthrough.lightblueexplorer&hl=en_US&gl=US)?

> <https://play.google.com/store/apps/details?id=com.punchthrough.lightblueexplorer&hl=en_US&gl=US>
>
> Bluetooth Low Energy (BLE) tool created by and for developers and enthusiast...

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**Author:** ![prajwalsunilkanse777](https://avatars.discourse-cdn.com/v4/letter/p/54ee81/32.png) [@prajwalsunilkanse777](https://community.thunkable.com/u/prajwalsunilkanse777)\
**Post date:** [May 15, 2022, 5:32am UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436/3 "2022-05-15T05:32:34Z")

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no it not connecting

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**Author:** ![muneer](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/muneer/32/75210_2.png) [@muneer](https://community.thunkable.com/u/muneer)\
**Post date:** [May 15, 2022, 1:10pm UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436/4 "2022-05-15T13:10:56Z")

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Your code does not use the error green block to see what kind of error is being generated from the `Connect to Device Name` block.

Without displaying the error how would you know what is the problem with your code?

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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, 1:13pm UTC](https://community.thunkable.com/t/i-tried-to-make-app-for-transmit-a-message-to-arduino-using-bluetooth-but-bluetooth-is-not-connecting-and-it-not-transmitting-the-message/1876436/5 "2024-11-08T13:13:16Z")

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