Transferring data through a device connection

[rodrigovaras]

This is more question about the usage for transferring data on paired device,
I look on this repo: https://github.com/inthehand/32feet and found a chaotic organization and design.
This code is so much better and I'm looking into using on a Raspberry Pi running Unbuntu.

Would be possible to have a similar API contract to use the same code against other platforms?
On this repo API what is the proper way to transfer block of data ? The idea I have is forwarding a phone app that receive a MQTT block of raw data and pass it to the raspberry PI. Also, the reverse will happen.

Do I need to use the 'Characteristic' interface to send and receive data ? Which GUID should i pass ? (the data source id ?) or should i create my own ?
I would need to write code in Windows and Android/iOS to do the reverse on the other side hence my question to find another library that does this but on non linux platforms.

Thanks.

[DamianSuess]

@rodrigovaras, I love the enthusiasm! Let's see if we can get you moving. But first, I'm going to move this over to the Discussions area, as this is an inquiry and not an issue with the library.

[DamianSuess]

Would be possible to have a similar API contract to use the same code against other platforms? On this repo API what is the proper way to transfer block of data ?

• Yes, I've used .NET MAUI apps, ESP32, and Nordic nrf52 to communicate to/from Raspberry Pi, Linux VMs (via VirtualBox), and Linux PCs in the healthcare sector.
• For transmission it depends on your project's needs and battery consumption. I mostly have used the BLE Notifications with this library due to its passive nature. Just got to be mindful of data sizes (i.e. <255) between platforms.

Do I need to use the 'Characteristic' interface to send and receive data?

• For BLE, yes. There must be a Service with a Characteristic configured on the BLE Server side.

Which GUID should i pass ? (the data source id ?) or should i create my own?

• The GUID for this Characteristic is configured by the BLE Server you're using/created.
• For instance, with .NET MAUI (and, Xamarin) I've use, Plugin.BLE and Shiny.BluetoothLE.
• Arduino and ESP32 BLE Servers, there are plenty of samples out there
  • ESP32 FreeRTOS - https://github.com/DamianSuess/EspBleLibrary
  • Arduino and other samples - https://github.com/DamianSuess/Learn.BluetoothLE