Turn Bluetooth on and off

[jeremypoulter]

Related to #165 I am also working on Low power, is it possible to stop the Bluetooth once started?

[hathach]

indeed, there should be a Bluefruit.stop() . We will include it in the next release. Thanks for posting the issue.

[jeremypoulter]

If you can post some direction more than happy to do a PR

[hathach]

It is essentially revert of the Bluefruit.begin()

https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/libraries/Bluefruit52Lib/src/bluefruit.cpp#L235

free up all resources task stack memory, delete task etc ... then call sd_softdevice_disable ( counter-part of sd_softdevice_enable )

[jeremypoulter]

I was thinking about that, but was thinking that is a bit drastic and was hoping for more of a pause and turn off the radio rather than tear down the full stack, Essentially this is for an off mode, I don't want to do the full power off as I need the RTC to keep running, but do want to shut down everything else.

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On 27 July 2018 at 09:51, hathach ***@***.***> wrote: It is essentially revert of the Bluefruit.begin() https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/libraries/ Bluefruit52Lib/src/bluefruit.cpp#L235 free up all resources task stack memory, delete task etc ... then call sd_softdevice_disable ( counter-part of sd_softdevice_enable ) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#167 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AF1WgKa2Od0EIZrIylNi7O1kKdDD4cCxks5uKtSKgaJpZM4VijyX> .

[hathach]

Ah I guess I got what you mean now, it is some sort of Bluefruit.pause() rather, I don't have any particular ideas now. But I think you could disable the BLE stack without disable the whole SoftDevice. Too bad, I am currently too busy with nrf52840, if you don't mind checking out the S132 specifications and docs, it may have something stated there. I will try to go back to 52832 a bit after getting 52840 a bit more stable.

[pbecchi]

From the test I did for issue #165 ,power consumption depend mainly from advertising, if you stop advertising the uA should go back to ≤10 when you are in low power mode...... eg.delay()!

[hathach]

@pbecchi Yeah, I will note this for upcoming tutorial as well. You want to disable auto start advertising on timeout, using low/fast interval theme, and start advertising base only when you thing needed button press or after large enough delay etc ..) depending on usage.

[jappavoo]

Any updates on this? For my use a full stop would be great.

[hathach]

I have't got time to work on this

[joshysav]

Sorry @hathach , any updates? :|

[MuckYu]

Would also like to see a .pause function.

Right now I use .stop to stop the BLE for a short time before enabling it again.

[glenne]

I need this as well. @MuckYu , Where did you find a .stop() method? Are you referring to just Advertising.stop() as opposed to Bluefruit.stop()?

@hathach , any update on stopping BLE altogether? I need to go into a deep sleep waiting on a button press.

[MuckYu]

Sorry used this a long time ago and don't remember the exact details. I believe in my case I tried to scan an RFID chip and send the code via bluetooth. But somehow it started sending the code while it was still scanning the RFID chip => weird chunks coming via Bluetooth. So I had to STOP the bluetooth function for just a second and send the whole RFID chip code once it reconnects. Below are some snippets from the code I used. "Bluefruit.Advertising.stop();" It should basically stop the bluetooth function and if you have auto-restart enabled it will reconnect. void startAdv(void) { // Advertising packet Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE); Bluefruit.Advertising.addTxPower(); // Include bleuart 128-bit uuid Bluefruit.Advertising.addService(bleuart); // Secondary Scan Response packet (optional) // Since there is no room for 'Name' in Advertising packet Bluefruit.ScanResponse.addName(); /* Start Advertising * - Enable auto advertising if disconnected * - Interval: fast mode = 20 ms, slow mode = 152.5 ms * - Timeout for fast mode is 30 seconds * - Start(timeout) with timeout = 0 will advertise forever (until connected) * * For recommended advertising interval * https://developer.apple.com/library/content/qa/qa1931/_index.html */ Bluefruit.Advertising.restartOnDisconnect(true); Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds } Hope this helps Am Do., 28. Jan. 2021 um 02:41 Uhr schrieb Glenn Engel < [email protected]>:

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I need this as well. @MuckYu <https://github.com/MuckYu> , Where did you find a .stop() method? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#167 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AHJN7VESBM7WUJNSGNJ6RZ3S4C6DXANCNFSM4FMKHSLQ> .

[ando600]

Hi, is there a way to stop the BLE service? I have a need similar to glenee.

Is there a workaround that I can do to fix this? Even if it's not included in the library, I really need to put the device in low power mode, and Bluefruit.begin causes the device to exit low power mode immediately, which does not work for my needs.

Thanks,
Andrew

[mittlc]

Dear Adafruit team,
is there any news on this issue?

I am looking for a way to stop the Bluefruit device and start it back up (Bluefruit.begin()) later to try to work around compatibility issues with my gps module, which seem to be blocked as soon as i start using the BLE.

I am looking for this on the Client side, and i already tried to disconnect from the peripheral and stop the scanning for the peripheral - but this doesn´t fix the issue, why i would like to try to disable the entire Bluefruit alltogether and start it back up.

[glenne]

I use the following before going to deep sleep. Maybe it'll help you. After deep sleep and waiting on a button press, it comes up like coming out of reset and reconfigures everything.

static void disconnectBle() {
  uint16_t connections = Bluefruit.connected();
  for (uint16_t conn = 0; conn < connections; conn++) {
    Bluefruit.disconnect(conn);
  }
}

void ble_sleep(void) {
  Bluefruit.Advertising.restartOnDisconnect(false);
  disconnectBle();
  Bluefruit.Advertising.stop();
}

After setting some lines hi-z and setting up a power-up interrupt I use

sd_power_system_off();

Maybe the ble_sleep() is sufficient for your needs followed by restarting advertising when you want to start again.

[mittlc]

Thanks @glenne,
Disconnecting on the client Side was actually sufficient. The issue was related to timing and to many activities at once. As soon as i introduced some time for each Operation GPS and Bluetooth go along just fine.