Can't connect to ESP32 BLE via Service UUID

[mrdc]

Hello,

I'm trying to connect to ESP32-Wroom from my iOS app via BLE using Service UUID, but I get an error that no device is connected. I can connect via BLE DeviceName or via DeviceUUID.

Hardware:

Board: ESP32 DevKit (38pin) (ESP32D0WDQ6 (revision 1))
Core Installation/update date: ESP32 by Espressif v1.0.4
IDE name: Arduino IDE
Flash Frequency: 80Mhz
PSRAM enabled: no
Upload Speed: 921600
Computer OS: Win

Code was here

[chegewara]

This looks like issue with iPhone app.

[lyusupov]

@chegewara

Shouldn't that:

  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMinPreferred(0x12);

be actually coded like this:

  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMaxPreferred(0x12);

?

[mrdc]

be actually coded like this:

Probably yes, I've taken this code (marked as working) from one of issues.

[chegewara]

@chegewara

Shouldn't that:

  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMinPreferred(0x12);

be actually coded like this:

  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMaxPreferred(0x12);

?

Yes, its typo.

[mrdc]

Makes no difference - iOS app can still connect via DeviceName but via Service UUID.

[chegewara]

Check service UUID, maybe you have typo in iOS app.

[mrdc]

I've checked - it's copy paste from ESP32 sources...

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[stale]

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