how to get faster reconnects from deep sleep about nimble-arduino

[toaster-robotics]

I was able to get the reconnect down to ~0.75 seconds by specifying the NimBLERemoteCharacteristic to subscribe to. I have it pared down to 3 NimBLERemoteCharacteristic or 3 handles (23, 31, 35). The bulk of the reconnect time is subscribing to the characteristics. One (23) takes ~0.05 seconds to subscribe. But the next two (31, 35) take ~0.35 seconds each. I couldn't get it to go any faster.
One strange thing is that I only need two (23, 31) of the characteristics to catch button presses. But for some reason, if I don't subscribe to the third one (35) I never receive notifications on the other two. If I can get this part figured out then I can cut the time down to ~0.4 seconds.

[tapir]

Is there a sample code you can share? I'm exactly in the same boat except light sleep instead of deep. Also may I ask how did you manage to wake up from deep sleep with so many keys? AFAIK waking up from deep sleep is only possible with RTC pins which are very limited.

[toaster-robotics]

@tapir , I just made my code into a library. I can't speak for your device. But the remote I'm using wakes with any button press. I have done 0 modifications to the remote. I've only been working on the ESP32 as a client. I don't touch the server. The remote goes for close to $1 on Aliexpress if you want to check it out.

I'm kinda thinking to achieve near instantaneous reconnects from sleep (like on a firestick remote) there would need to be changes to the BLE remote code. But I don't plan on attempting that because: 1. I'm treating it as a off-the-shelf part and 2. I would have no idea how to do that.