# BLE / BlueTooth **URL:** https://community.thunkable.com/c/thunkable/ble-bluetooth/77.md [Latest](https://community.thunkable.com/latest.md) · [Categories](https://community.thunkable.com/categories.md) · [Tags](https://community.thunkable.com/tags.md) --- ## [About the BLE / BlueTooth category](https://community.thunkable.com/t/about-the-ble-bluetooth-category/1876609)
**Author:** [@jared](https://community.thunkable.com/u/jared)\ **Replies:** 3\ **Last updated:** [November 14, 2023, 8:36pm UTC](https://community.thunkable.com/t/about-the-ble-bluetooth-category/1876609 "2023-11-14T20:36:00Z")
This area is dedicated to using/implementing BLE with your Thunkable App. --- ## [BLE - transmit without response](https://community.thunkable.com/t/ble-transmit-without-response/4108517)
**Author:** [@steve\_synopsis](https://community.thunkable.com/u/steve_synopsis)\ **Replies:** 0\ **Last updated:** [March 31, 2026, 9:37pm UTC](https://community.thunkable.com/t/ble-transmit-without-response/4108517 "2026-03-31T21:37:08Z")
Hi, Can someone give a definitive answer as to whether the Transmit blocks in BLE use Transmit with Response or Transmit without Response. Thanks --- ## [BLE connect to Device Id works with Android, not with iOS](https://community.thunkable.com/t/ble-connect-to-device-id-works-with-android-not-with-ios/4107730)
**Author:** [@tintin4000](https://community.thunkable.com/u/tintin4000)\ **Replies:** 6\ **Last updated:** [October 16, 2025, 4:14pm UTC](https://community.thunkable.com/t/ble-connect-to-device-id-works-with-android-not-with-ios/4107730 "2025-10-16T16:14:54Z")
I am connecting my Thunkable App to an ESP32-S3 using its mac address as its device name. Everything is working fine on Android, but after downloading the app on iOS 26, I got a message ‘“Invalid UUIDs or IDs were passe… --- ## [Color Builder and Pattern Selector](https://community.thunkable.com/t/color-builder-and-pattern-selector/4062040)
**Author:** [@rhino-led](https://community.thunkable.com/u/rhino-led)\ **Replies:** 1\ **Last updated:** [August 8, 2025, 3:57pm UTC](https://community.thunkable.com/t/color-builder-and-pattern-selector/4062040 "2025-08-08T15:57:48Z")
Hi everyone, I’m building an app with a color picker where users can create custom patterns. Here’s what I want to achieve: Users can select up to 10 colors (hex values). Users can choose an animation from a list … --- ## [Unable to connect to Device](https://community.thunkable.com/t/unable-to-connect-to-device/3820102)
**Author:** [@hellos5lu97](https://community.thunkable.com/u/hellos5lu97)\ **Replies:** 2\ **Last updated:** [May 12, 2025, 10:15pm UTC](https://community.thunkable.com/t/unable-to-connect-to-device/3820102 "2025-05-12T22:15:25Z")
I’ve been trying to get my app to connect a Bluetooth device using Thunkable. It’s a very simple app. All it does is scan for a particular device name and connect to it. However, I can’t seem to get it to connect. I foll… --- ## [Envoi et réception de 3 Bytes entre ThunkableX et ESP32](https://community.thunkable.com/t/envoi-et-reception-de-3-bytes-entre-thunkablex-et-esp32/3793541)
**Author:** [@fithol](https://community.thunkable.com/u/fithol)\ **Replies:** 0\ **Last updated:** [May 2, 2025, 4:27pm UTC](https://community.thunkable.com/t/envoi-et-reception-de-3-bytes-entre-thunkablex-et-esp32/3793541 "2025-05-02T16:27:28Z")
Bonjour de Belgique , Je suis déja un vieux Monsieur de 73 ans et j’essaye d’utiliser ThunkableX (débutant) pour l’envoi et la réception de Bytes. Le seul moyen que j’ai trouver est par un string, jusque là pas de probl… --- ## [\[SOLVED\] Difficulty Receiving Strings Over Bluetooth](https://community.thunkable.com/t/solved-difficulty-receiving-strings-over-bluetooth/3755073)
**Author:** [@4001.group16zwb6dn](https://community.thunkable.com/u/4001.group16zwb6dn)\ **Replies:** 3\ **Last updated:** [April 21, 2025, 6:04pm UTC](https://community.thunkable.com/t/solved-difficulty-receiving-strings-over-bluetooth/3755073 "2025-04-21T18:04:10Z")
Hello, I am trying to receive 4 numbers in Thunkable through BLE. I send all 4 values in 1 string, separated by commas. The string is read properly on nRF Connect, and the Arduino code is attached. I’m confident that th… --- ## [How to connect thunkable app and ESP32 through bluetooth?,](https://community.thunkable.com/t/how-to-connect-thunkable-app-and-esp32-through-bluetooth/3756909)
**Author:** [@ambayalejandrojerich](https://community.thunkable.com/u/ambayalejandrojerich)\ **Replies:** 0\ **Last updated:** [April 20, 2025, 4:47pm UTC](https://community.thunkable.com/t/how-to-connect-thunkable-app-and-esp32-through-bluetooth/3756909 "2025-04-20T16:47:58Z")
Hi, I’m a beginner in using thunkable and really need help, we have a project using ESP32 with wireless communication and control. I want to make an app where I can input the time for taking my med. Please help me --- ## [BLE Receive String Fails](https://community.thunkable.com/t/ble-receive-string-fails/3697592)
**Author:** [@jgustafson05pf1zos](https://community.thunkable.com/u/jgustafson05pf1zos)\ **Replies:** 1\ **Last updated:** [April 1, 2025, 11:08pm UTC](https://community.thunkable.com/t/ble-receive-string-fails/3697592 "2025-04-01T23:08:51Z")
In my project I am able to transmit data just fine, but for some reason the receive string block always fails. I have confirmed the UUID is correct, and I have confirmed in my code that just a simple string of 3 comma se… --- ## [Help connecting and displaying BLE on thunkable live!](https://community.thunkable.com/t/help-connecting-and-displaying-ble-on-thunkable-live/3680984)
**Author:** [@leilamaria09rdc6nl](https://community.thunkable.com/u/leilamaria09rdc6nl)\ **Replies:** 0\ **Last updated:** [March 22, 2025, 8:50pm UTC](https://community.thunkable.com/t/help-connecting-and-displaying-ble-on-thunkable-live/3680984 "2025-03-22T20:50:42Z")
Hi! I am trying to connect my esp32 to my app through BLE on one screen, and then display the data from the esp32 onto another screen. So far, the bluetooth connects, but on my other screen where I try to display the dat… --- ## [Displaying parsed Bluetooth string data in a label](https://community.thunkable.com/t/displaying-parsed-bluetooth-string-data-in-a-label/3647736)
**Author:** [@praxiumsafetyaxylbj](https://community.thunkable.com/u/praxiumsafetyaxylbj)\ **Replies:** 2\ **Last updated:** [March 11, 2025, 8:14pm UTC](https://community.thunkable.com/t/displaying-parsed-bluetooth-string-data-in-a-label/3647736 "2025-03-11T20:14:57Z")
I have created a code which successfully reads and displays parsed Bluetooth data into a simple list. The data string is made up of three numbers (example “0,0,0” or “1000,2000,500”). The issue I am having, is assigning … --- ## [Receiving data from BLE device (HM-10 bluetooth module)](https://community.thunkable.com/t/receiving-data-from-ble-device-hm-10-bluetooth-module/3312074)
**Author:** [@kayleep0702yrni0i](https://community.thunkable.com/u/kayleep0702yrni0i)\ **Replies:** 4\ **Last updated:** [March 10, 2025, 1:20pm UTC](https://community.thunkable.com/t/receiving-data-from-ble-device-hm-10-bluetooth-module/3312074 "2025-03-10T13:20:56Z")
Hello, My group is currently working on a project where we need to be receiving constant outputted data from a BLE device. We are using the HM-10 Bluetooth module connected with our Arduino. So far we have been able to … --- ## [Ble connect to arduino problems](https://community.thunkable.com/t/ble-connect-to-arduino-problems/3591764)
**Author:** [@jernej.zupanc37zfze9](https://community.thunkable.com/u/jernej.zupanc37zfze9)\ **Replies:** 19\ **Last updated:** [February 21, 2025, 10:20am UTC](https://community.thunkable.com/t/ble-connect-to-arduino-problems/3591764 "2025-02-21T10:20:19Z")
I have a problem with the connection between the arduino esp32 wroom and the thunkable app via bluetooth low energy. Does anyone have any idea why this is not working as it should. Thanks for help in advance. And if you … --- ## [How to make charts that can be real-time updated on thunkable using bluetooth?](https://community.thunkable.com/t/how-to-make-charts-that-can-be-real-time-updated-on-thunkable-using-bluetooth/3538849)
**Author:** [@robotassistedtherapy](https://community.thunkable.com/u/robotassistedtherapy)\ **Replies:** 1\ **Last updated:** [February 6, 2025, 9:41pm UTC](https://community.thunkable.com/t/how-to-make-charts-that-can-be-real-time-updated-on-thunkable-using-bluetooth/3538849 "2025-02-06T21:41:15Z")
Im working on an app that will be used for rehab purposes connected to an arduino using BLE .Im looking to find a way to make charts that will update in real time with the new information from each direction(position,ang… --- ## [BLE max transmit](https://community.thunkable.com/t/ble-max-transmit/3446908)
**Author:** [@ocorbo](https://community.thunkable.com/u/ocorbo)\ **Replies:** 1\ **Last updated:** [January 3, 2025, 6:02pm UTC](https://community.thunkable.com/t/ble-max-transmit/3446908 "2025-01-03T18:02:06Z")
Hello, until now I’ve only been using the ‘Transmit String’ block and by splitting my messages into less than 20 characters, i manage to send larger messages to my microcontroller.I would be interested in trying it with … --- ## [Como separa texto de string](https://community.thunkable.com/t/como-separa-texto-de-string/3439016)
**Author:** [@raiknupfer665tjuw4](https://community.thunkable.com/u/raiknupfer665tjuw4)\ **Replies:** 1\ **Last updated:** [December 28, 2024, 11:12pm UTC](https://community.thunkable.com/t/como-separa-texto-de-string/3439016 "2024-12-28T23:12:14Z")
LED1: 0.0m, LED2: 0.0m, LED3: 0.0m, LED4: 0.0m, LED5: 0.0m, LED6: 0.0m, LED7: 0.0m, LED8: 0.0m, LED9: 0.0m, LED10: 0.0m SEPARA POR , PARA CADA LEGENDA SERIA LED1: 0.0m --- ## [Get data from HC-05](https://community.thunkable.com/t/get-data-from-hc-05/3435172)
**Author:** [@1771764231rbfiwe](https://community.thunkable.com/u/1771764231rbfiwe)\ **Replies:** 3\ **Last updated:** [December 26, 2024, 2:09pm UTC](https://community.thunkable.com/t/get-data-from-hc-05/3435172 "2024-12-26T14:09:59Z")
Hope to seek some directional advice as I am currently not able to get data from HC-05.I’m now working a project to dedect heartrate but I don’t know how to set blocks to achieve my goal.I will appreciate it that if soom… --- ## [Pairing with Silicon Labs modules](https://community.thunkable.com/t/pairing-with-silicon-labs-modules/3420514)
**Author:** [@marcello.belli9e0svz](https://community.thunkable.com/u/marcello.belli9e0svz)\ **Replies:** 1\ **Last updated:** [December 19, 2024, 7:39pm UTC](https://community.thunkable.com/t/pairing-with-silicon-labs-modules/3420514 "2024-12-19T19:39:02Z")
I’m testing thunkable with Silicon Labs modules implementing the Bluetooth Xpress service, which is an UART over BLE data streaming. Such modules require encription pairing, while bonding is an option. I can easily sca… --- ## [Pleading for assistance with ESC/POS commands via BLE](https://community.thunkable.com/t/pleading-for-assistance-with-esc-pos-commands-via-ble/3384182)
**Author:** [@steve\_synopsis](https://community.thunkable.com/u/steve_synopsis)\ **Replies:** 2\ **Last updated:** [December 5, 2024, 7:45pm UTC](https://community.thunkable.com/t/pleading-for-assistance-with-esc-pos-commands-via-ble/3384182 "2024-12-05T19:45:47Z")
I have been working on a project for a while which utilises a ESC/POS compatible BLE printer. I can get text printed fine, but cannot get any hex commands to change font, bold, underline, LF, etc. to work. The last tim… --- ## [Receive BLE advertising frames with Thunkable](https://community.thunkable.com/t/receive-ble-advertising-frames-with-thunkable/3371818)
**Author:** [@jan2912op29h](https://community.thunkable.com/u/jan2912op29h)\ **Replies:** 0\ **Last updated:** [November 27, 2024, 2:08pm UTC](https://community.thunkable.com/t/receive-ble-advertising-frames-with-thunkable/3371818 "2024-11-27T14:08:14Z")
What options does Thunkable have to receive BLE advertising frames? The idea is to build an app that always listens for these frames and prints/processes them when a frame is received. Does one of you have experience wit… --- ## [BLE Characteristic UUID issues sending Data](https://community.thunkable.com/t/ble-characteristic-uuid-issues-sending-data/3334160)
**Author:** [@rhino-led](https://community.thunkable.com/u/rhino-led)\ **Replies:** 11\ **Last updated:** [November 26, 2024, 8:47pm UTC](https://community.thunkable.com/t/ble-characteristic-uuid-issues-sending-data/3334160 "2024-11-26T20:47:16Z")
I’m still having issues trying to send hexidecimal commands to my bluetooth app i’m writing. I get the error above, In one post this was a bug but I still can’t get it to work. #include \ #include \ **Author:** [@rhino-led](https://community.thunkable.com/u/rhino-led)\ **Replies:** 20\ **Last updated:** [November 14, 2024, 12:47am UTC](https://community.thunkable.com/t/scanning-for-bluetooth-and-filtering-results/3316850 "2024-11-14T00:47:49Z") I have found some threads about this but never could get any of them to work. What am i doing wrong? I’ve tried several combos of this and can’t get anything to display bluetooth results that have names. I don’t want bla… --- ## [Testing BLE on IOS](https://community.thunkable.com/t/testing-ble-on-ios/3315526)
**Author:** [@rhino-led](https://community.thunkable.com/u/rhino-led)\ **Replies:** 7\ **Last updated:** [November 1, 2024, 8:49pm UTC](https://community.thunkable.com/t/testing-ble-on-ios/3315526 "2024-11-01T20:49:31Z")
I have an apple developer account. and a paid service to thunkable. I am creating an app to send data back and forth to my custom BLE controller. I can see the scan and see my controller via the thunkable live app, but … --- ## [Ble not working and nothing chage](https://community.thunkable.com/t/ble-not-working-and-nothing-chage/3265354)
**Author:** [@Arebolledo](https://community.thunkable.com/u/Arebolledo)\ **Replies:** 11\ **Last updated:** [October 23, 2024, 6:16pm UTC](https://community.thunkable.com/t/ble-not-working-and-nothing-chage/3265354 "2024-10-23T18:16:21Z")
hi there i have a code does just work and then not work anymore and i not touch nothing and the codes not conect to the device, i just conect to app inventor for reading ble and work i’ts not hardware problem and i can r… --- ## [Help with Bluetooth Connection Between Thunkable App and Arduino](https://community.thunkable.com/t/help-with-bluetooth-connection-between-thunkable-app-and-arduino/3276394)
**Author:** [@pablogomes012001v8nw](https://community.thunkable.com/u/pablogomes012001v8nw)\ **Replies:** 4\ **Last updated:** [October 18, 2024, 9:32pm UTC](https://community.thunkable.com/t/help-with-bluetooth-connection-between-thunkable-app-and-arduino/3276394 "2024-10-18T21:32:05Z")
Hello everyone, I’m currently working on an app using Thunkable, and I’m trying to set up a Bluetooth connection with my Arduino using a Bluetooth module. I have searched everywhere but haven’t found clear instructions … --- ## [BLE Device Connection Issue in APK](https://community.thunkable.com/t/ble-device-connection-issue-in-apk/3272664)
**Author:** [@toptothetop1u2iv1y](https://community.thunkable.com/u/toptothetop1u2iv1y)\ **Replies:** 2\ **Last updated:** [October 15, 2024, 8:51pm UTC](https://community.thunkable.com/t/ble-device-connection-issue-in-apk/3272664 "2024-10-15T20:51:14Z")
Hello, I’m currently working on a project using BLE (Bluetooth Low Energy). In the live app, the BLE device connects without any issues. However, when I download the APK, the device no longer connects. I recall that it … --- ## [Has anyone integrated sensor readings from a rasberry pi zero?](https://community.thunkable.com/t/has-anyone-integrated-sensor-readings-from-a-rasberry-pi-zero/3241048)
**Author:** [@dalexxvtxvz](https://community.thunkable.com/u/dalexxvtxvz)\ **Replies:** 1\ **Last updated:** [October 2, 2024, 1:28pm UTC](https://community.thunkable.com/t/has-anyone-integrated-sensor-readings-from-a-rasberry-pi-zero/3241048 "2024-10-02T13:28:49Z")
Rasberry pi zero intergration. --- ## [Parsing ble string with delimiter and no empty strings](https://community.thunkable.com/t/parsing-ble-string-with-delimiter-and-no-empty-strings/3204726)
**Author:** [@ocorbo](https://community.thunkable.com/u/ocorbo)\ **Replies:** 3\ **Last updated:** [September 22, 2024, 10:43am UTC](https://community.thunkable.com/t/parsing-ble-string-with-delimiter-and-no-empty-strings/3204726 "2024-09-22T10:43:32Z")
hi everybody, so i’d like to parse a BLE string sent from an esp32 that has this form (^9^^FIZZ23010,-39^^H). the ‘^’ is the delimiter. the problem i have is that everytime there 2x ‘^’ back to back it create an empty it… --- ## [\[SOLVED\] Only show BLE device with a certain name](https://community.thunkable.com/t/solved-only-show-ble-device-with-a-certain-name/3186906)
**Author:** [@ocorbo](https://community.thunkable.com/u/ocorbo)\ **Replies:** 6\ **Last updated:** [September 16, 2024, 10:58pm UTC](https://community.thunkable.com/t/solved-only-show-ble-device-with-a-certain-name/3186906 "2024-09-16T22:58:26Z")
i was able to get this far. id like to be able to only show devices that has “pdstal” in their name. How could i acheive that ? --- ## [Filter and connect to a specific Bluetooth device from the List Viewer](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943)
**Author:** [@thunkable28](https://community.thunkable.com/u/thunkable28)\ **Replies:** 4\ **Last updated:** [September 6, 2024, 9:31pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943 "2024-09-06T21:31:21Z")
Hello Thunkable community, I am working on a BLE app where the App first scans for all the discoverable devices and then user connects to a specific device from the ListViewer. The block implementation to discover the B… [Next page](https://community.thunkable.com/c/thunkable/ble-bluetooth/77.md?page=1)