BLE without internet connection

Need Help With My Project
1

Hi Guys. I have one question. In my project iam using BLE connection to my ESP32. When i have internet connection everything working fine. But when i go offline i can recieve data from my device to my phone with:


Blynk.virtualWrite(V1, temperature);

but i cannot set anything for example:


BLYNK_WRITE(V2)
{
  int val = param.asInt(); 
  thermostatON = val;
    
}

when i have internet connection i can set thermostatON without problem .

Thanks for answers.

2

Search and you shall find :slight_smile: BT/BLE and it’s still relevant need for Internet has been discussed many times in this forum.

Blynk is not a standalone App, it uses a server system:
APP <-Network-> SERVER <-Network-> MCU

With BT/BLE the App also acts like a go between from the MCU and the Server:
MCU <- BT/BLE -> APP <- Network -> SERVER

Thus some form of connection between the Phone (APP) and the Server (Cloud or Local) is still needed… No Server No Service!

When dealing with the Cloud, that is via the Internet

When dealing with a Local Server, that you have setup yourself, that could be as simple as a adhoc WiFi link, or full home network link, between the Phone and something running the Server, like a Raspberry Pi or PC