How many times did I say 'BLE'?

I’ve been struggling with an ESP-32 BLE project for a long time. It’s a project for reading devices for medical missions to 3rd world locations. I’ve read dozens of articles, PDFs, etc. All were too low-level or high-level. From this I understand all the theory, but putting it into practice has been too much. This is the first resource that gave me hardcore practical information. I’m excited that now I understand how I can make it work! Thank you so much for this help!

Super helpful to have this info in a short video I've been able to rewatch whenever i need to write BLE code. Thanks!

best BLE tutorial i have seen so far !!

Amazing clear guide! Im looking into building my own vertical hydroponic garden and using audrinos in order to compile data on the garden and make sure its recieving proper amounts of water and nutrients. Please keep it up!!

Thank you so much, for the through explanation of the BLE basics, even though I knew most of it, you clarified some of questions I had.

Very good detail description of BLE on ESp 32

Thanks for your clear instruction. How about making a BLE beacon. Do you have any project that touched on subject ?

This is a very helpful tutorial for newbies. Thank you very much for your effort.

best tutorial on this topic by far! many thanks!

Thanks for a great tutorial! May I ask where do I find the XML that defines a pre-defined standard characteristic like the temperature (8:30 in the video) I do not find it anywhere in bluetooth site. The service XML does not have this info. Thanks!

Great video thanks. Question. Am I able to send a bluetooth classic throttle signal over serialBT from a transmitter ESP32 to a receiver ESP32 whist also sending temperature readings back to the transmitter ESP32? If so! Would I use BLE for this? Can I even use BT and BLE at the same time?

Great video and everything was explained very well.

Thanks very much for this! Your explanation was very useful. Thanks for telling us about chars too.

Good video, how can I make a simple process a resend some data to the phone? For example, a humidity sensor and a light sensor send data to a device, and then the device sends these data to my phone via Bluetooth. Can a ESP32 be configured as Client and server at the same time? Thanks

Really good explanation!! Thank you!

Best tutorial also I want to know that is connection remain connected when esp32 wakes up from deep sleep (i use deep sleep for very low battery power consumption (1mA) )??

Thank you so much for this tutorial!!!

Superb explanation boss and thanks for this tutorial.

Gracias!!! muy buena explicacion!

nice vedio im trying to use float variable and i want to perform read and write value using BLE but im not able to do that can you exeplian me . thanks

im having an extremely hard time making this work on a psoc 6 board, the code is kinda similar but some of the concepts differ a little bit, if possible, could you do a tutorial with a board of the psoc 6 family using Eclipse IDE?

sir, can we consider RSSI value without pairing one with another BLE and perform action based on RSSI value?

Best BLE tutorial... 👌🙌

Very helpful, thank you!

Trying to get a 2nd ESP32 to act as a client for the BLE switch (server). Any suggestions on what code to load on the client side?

Thank you so much This is helpful

What should I put in the ESP32 disconnect function in order to let the ESP32 be advertised for a new connection? Its seems the code in the setup is executed one time and when I disconnect client device (a MIT appinventor custom app) I cannot reconnect again. The ESP32 server is stopped - maybe you have a link to correct configuration for a MIT app disconnect command?

How could I do to read the Slope in Zwift (bike simulator) and the said a motor move to position 1 to 10?

how to configure wifi by using ble in esp32 using arduino? Do you have any video in this regard?

Hello, great tutorial, can you help with idea? Can you connect to the zwift cycling program as a fitness machine ftms and receive or obtain the gradient or resistance level. I have been trying for months. Thanks for any help.

Good job, thanks a lot! ✌🏼🇧🇷

Hi, I'm making an android app like mojipic with ble. Can you help me? I have to convent gifs to c array and then show it on a led panel with arduino

I loaded your app into MIT App Inventor, compiled and put it on my Pixel 3A phone. I also loaded your switch code onto my ESP32 board. There seems to be something wrong with the App as it always comes back with "No Devices Found". Running a "BLE Scanner" app I can find the ESP32 and see that the switch program is working. Running an app I wrote on MIT App Inventor for a different BLE module, I was able to see the ESP32, but could not connect because it was looking for a different service ID. I even tried loading your APK, and it was unable to find any devices. Not sure what is wrong, but something seems broken as both my APP and the BLE scanner can see the ESP32, but your APP does not.

Amazing content bro.

Excellent! Thanks

The BLE Viewer App does not see any devices at all, the nRF Connect works fine as sees all BLEs in the area

Hi, I want to send an int type array of lenght 34 over BLE and recieve it using matlab. can you please help me out here how to proceed!

how to transfer data between two ble server and client plzhelpme in tht

Hi there. I hope you are still active. I need to build a bluetooth scanner which fires a relay when a specific bluetooth device is in the proximity. I have a firebeetle and the arduino IDE. I am lost from that point on. I can't find the board in the list, I cannot seem to connect. Yes, I am a n00b

You can send more than a single byte in a characteristics value. Using the setvalue byte array parameter is not a workaround, it's a feature

Hello, thanks for the tutorial! but i've got some problem that my potentiometer analog value is always 255 (shown in the serial monitor), or the value at the characteristic is always FF at the nRF Connect App. I use GPIO14 from ESP32 DOIT DEVKIT V1 Board. Can you help me please? thanks

What was the dev tools you mentioned you created the Android app in?

Hi , I would like to replace HM10 by the ESP32 BLE so that the existing Android and IOS app's can be used without the need of the HM10. Can you or someone here give some advice please? I changed the UUID's already but that seems not enough. How to modify the code to replace the HM10? Thx.

How to receive integer data from an iphone BLE app? I was able to receive just 1 digit in ASCII. No matter the length of my data is it only take the first digit in consideration. But if I send whole string like name then it is fine. This is the receiving code" if (rxValue.length() > 0) { Serial.println("*********"); Serial.print("Received Value: "); for (int i = 0; i < rxValue.length(); i++) x = (rxValue[i]); Serial.println(x); I want to assign any value I send from my iphone

How to set multiple characteristics in one service?

Hi, thanks for the wonderful tutorial, I am trying to connect my ESP32 board to Chrome using web Bluetooth, however, the chrome is not able to detect it, can you please help what might be the problem? It works well with nrfConnect

What app are you using on your Android phone to see the BLE device with characteristics and values being sent?

Please clarify: This sets up the ESP32 as a BLE Server in Broadcast mode? THANKS

Hey, nice Video. Im trying atm to communicate with a bluetooth radiator-valve atm. If i scan for ble devices with the examplecode given by the IDE, i can find it. But i was hopeing i could use your video to find out which data i can request or just get from the device. There is an existing project on github already, but i want to build my own. I need abit of help. Do you have any idea?

Will this code also work if I use other hardware? I am using the dht22 as a sensor and I have the bluefruit spi friend as a bluetooth device both connected to the arduino

Thank you for your BLE videos. I have an ESP32 and I have tried your BLE examples and they all work on my phone. I am struggling to get the BLE Client to work as I want to be able to have another ESP32 read these values. Here is what happens when I run your BLE_everything_to_string program on another client BLE which I am using the built in BLE_client app: Starting Arduino BLE Client application... BLE Advertised Device found: Name: , Address: 4b:41:58:c8:94:f2, manufacturer data: 4c0010050818237b8e BLE Advertised Device found: Name: , Address: 1e:44:1e:8d:54:08, manufacturer data: 0600010920021f0f72b658f8fa6a56054b76f656467d07548b169b875d BLE Advertised Device found: Name: , Address: 4a:f7:2c:59:b5:ec, manufacturer data: 4c001005421c6e4d8a BLE Advertised Device found: Name: , Address: 7f:79:4e:7f:82:4e, manufacturer data: 4c0010050818237b8e BLE Advertised Device found: Name: , Address: 57:b1:e4:c9:d2:82, manufacturer data: 4c001005401c7dd543 BLE Advertised Device found: Name: , Address: 7b:d8:62:bc:e9:84, manufacturer data: 4c001005241c548cdc, txPower: 8 As you can see I do not see the Device Name or any of the messages like this is a string as I am seeing them on my phone app but not on the BLE_client. Any help would be appreciated!

Thanks for great tutorial but BLE_Viewer2.apk is not able to detect my esp32 ble device

Hi! Do you know any method to limit on the server the number of incomming connections (clients) to one? Thank you.

8:26 how do I access this page to view how data for different pre defined characteristics needs to be formatted for a guide for an incoming project.

How can I send json data via bluetooth?

I'm am to able to convert incoming Lora data packet to char at initialization sir how I can send seprate sensor value to custom app I have tried all the stuff. I want to send my Lora reciver data packet which is coming from node to reciver to my custom app sir how I can achieve that

I appreciate your video. But it would help if the sound was better. It is hard to understand you because of the room reverberations. Move the mic closer to you. Or use some soft items to absorb the sound of the room.

Nice one

Not working, I'm using a huzzah32 board with ds18b20 and I am not able to get any temp readings using this code. i can connect via ble but will not give me any temp values on the app or on the serial monitor ive tried many different pins. Any help please?

Do you do freelance works?

Is it possible to extend its range?

Can you guide me

Didn't work at all.... Couldnt connect to iOS (iphone XS) or Windows 10. 2 months looking for a solution and nothing... I guess I'll go back to Arduino....

hello the app is not connecting to ESP32 always responds no device found

Oh boy... Finally, an Indian boy comes to rescue the BLE developer. Thanks.

bruh too much object

Can you guide me