RE: How to transfer sensor data from ESP32 peripheral server to ESP32 central client

[aaronchan1992]

Hi,
I am working on a parking project based on esp32. Can you provide me with some guidelines and tips on how I can send data from an esp32 server to another esp32 client using ble advertising. As of now, I am able to do ble pairing which connect the server to the client by tallying the UUID and bluetooth mac address. Beyond it I really need your help.

Thank you.

ESP32 ble.zip

[chegewara]

https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLETests/Arduino/BLE_iBeacon/BLE_iBeacon.ino

You dont have to use BLEBeacon class, its more about those lines:
https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLETests/Arduino/BLE_iBeacon/BLE_iBeacon.ino#L67-L68

[aaronchan1992]

Thanks for sharing me the code. I intend to use the hall effect and a ultrasonic sensor to detect the presence of vehicle on the server. Then it can pass the data to the client esp32 board. Then lastly on the client side I want to push the parking availability data to a webserver using the wifi AP. Is it possible?

[chegewara]

Sure, it is possible.

[aaronchan1992]

Hi may I know do you have a working code to demonstrate the BLE communication between the server peripheral and central client to give me a better understanding. I need some good references to help me get started with my project. Thank you.

[chegewara]

Examples included in snippets library are good start.

[aaronchan1992]

From the code it is merely a ble advertising function performed from the server side right, so on the client side I can still use my original code for ble pairing right? From it didn't exactly show how can the client retrieve the data from my server. Do I need to create a gatt profile and descriptor for the server. Can you elaborate more on it. Thanks

[aaronchan1992]