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h2zero / NimBLE-Arduino

A fork of the NimBLE library structured for compilation with Arduino, for use with ESP32, nRF5x.
https://h2zero.github.io/NimBLE-Arduino/
Apache License 2.0
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Reconnect after Board reboot #542

Open mr-deamon opened 1 year ago

mr-deamon commented 1 year ago

Hi there I now tried to get this to run a full afternoon :)

I'll try to get my ESP32C3 (no classic BT, this might have been easier?!) act as a ble-server (with security) and have an android phone connect to it. This connection should be automatically re-established, as soon they come close enough. If i switch off and on the phones BT it works (reconnect), if i reboot the ESP it doesn't. Android keeps listing the server in "saved devices" but not in the "connected" list.

My goal: i have a button which should only work, if a previously joined device (my phone) is nearby. no data exchange, nothing, just "if successfully authorized and connect, forward the key-press. if not, do nothing.

any ideas? would greatly appreciate it! chris

h2zero commented 1 year ago

Sounds like you need to enable bonding on the esp32.

Here is an example that uses it: https://github.com/h2zero/NimBLE-Arduino/blob/remote-attr-index/examples/NimBLE_Secure_Server/NimBLE_Secure_Server.ino

mr-deamon commented 1 year ago

Thank you. It's finally working on android with this code: https://gist.github.com/mr-deamon/b1c8b82cfefffac89e0f75b08a7292ee

But ios does not show the pin-prompt. I tried 1000 things, but it remains the same, ios simply connects (without bonding, strangely). Any ideas why? This should be working on android and ios the same way... Thanks Chris

JanB97 commented 1 year ago

For me this doesn't work at all. The ESP show one bound device after reconnecting but I am completely unable to connect again unless I remove the esp from my phone and pair again. I am using android. Is there anything I am missing? I tried the secure server example and the code from @mr-deamon .

pmmcmullen94 commented 1 year ago

For me this doesn't work at all. The ESP show one bound device after reconnecting but I am completely unable to connect again unless I remove the esp from my phone and pair again. I am using android. Is there anything I am missing? I tried the secure server example and the code from @mr-deamon .

I'm having the same issue. In windows, it connects fine but then cycles between "Paired" "Connected" "Paired" "Connected" and I have to completely forget the device and readd. For my iPhone, it'll connect fine the first time but then I have to forget the device to readd it.

I'm using auth and whitelisting. It requires a pin code to be entered to start up

h2zero commented 1 month ago

its been some time for this, sorry for the lack of response.

try: NimBLEDevice::setSecurityInitKey(3); and let me know if it helps.