Bluetooth 5 Long Range support

[hathach]

ref https://www.nordicsemi.com/eng/Products/Bluetooth-5
ref https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/

Update 1: iOS 13.4 could enable long range feature on compatible device https://www.reddit.com/r/iOSBeta/comments/fcww2x/feature_ios_134_beta_enables_ble_long_range/

Update 2: advertising on Coded PHY https://devzone.nordicsemi.com/f/nordic-q-a/49799/issue-regarding-nrf52840-long-range-mode

Update 3: SDK example is ble_app_att_mtu_throughput

Update 4: nRF Connect App on Android support seem to support Long Range already !!

Update : list of mobile device that is known to support Long Range, source
https://devzone.nordicsemi.com/f/nordic-q-a/33060/is-there-any-smartphone-with-supporting-of-bluetooth-5-long-range-feature/221305#221305

Apple Iphone XS
Apple Iphone XS MAX
Apple Iphone XR
Apple Iphone 11
Apple Iphone 11 PRO
Apple Iphone 11 PRO MAX

Samsung Galaxy S10
Samsung Galaxy S10E
Samsung Galaxy S10+
Samsung Galaxy Note 10
Samsung Galaxy Note 10 PLUS
Samsung Galaxy Fold 

OnePlus 6
OnePlus 7 
OnePlus 7 PRO

Google Pixel 4 XL 
Google Pixel 4 

Huawei P30
Huawei P30 Pro
Huawei Mate 20
Huawei Mate 20 Pro

Edit:

Xiaomi Mi 9

[lefedor]

https://www.nordicsemi.com/eng/Products/Bluetooth-5
Have interest in this myself.
Want mention that long range is not in the nRF52832 feature list, only for the nRF52840.

[hathach]

@lefedor nrf52840 is coming to Adafruit store soon enough :D

[mharper]

I have a relatively immediate need for this feature and have a nRF52840 Feather landing here in a few days. @hathach if you can give me a vector or two on how to implement this, I can do it.

[hathach]

This is new to me as well, you need to dive into Nordic docs and code to get it work. Please let us know what you figure out.

[mharper]

Acknowledged. Will let you know what I find out.

[mharper]

Based on what I've pieced together so far, the best example of how to do this is in the nRF SDK example found here:

examples/ble_central_and_peripheral/experimental/ble_app_att_mtu_throughput

Relevant struct: ble_gap_phys_t
Therein lie: tx_phys and rx_phys. The value to use there for extended range appears to be BLE_GAP_PHY_CODED.
Relevant API call: sd_ble_gap_phy_update

So in the context of bluefruit.cpp, I imagine the call might look like this to set the PHY:

bool AdafruitBluefruit::setPhy(int8_t phy) {
  ble_gap_phys_t phys;
  phys.tx_phys = phy;
  phys.rx_phys = phy;
  VERIFY_STATUS( sd_ble_gap_phy_update(_conn_hdl, &phys), false );
  return true;
}

Enabling extended range would then look like:

Bluefruit.setPhy(BLE_GAP_PHY_CODED);

You can set the PHY to any one of:

• BLE_GAP_PHY_AUTO
• BLE_GAP_PHY_1MBPS
• BLE_GAP_PHY_2MBPS
• BLE_GAP_PHY_CODED (nRF52840 only)

[syed93uthman]

this feature will help in my project alot. Thanks

[hathach]

@mharper thank you very much for your findings. I will do some simple tests here, but currently occupied by usb work.

[jps2000]

any chance of progress here?
thanks

[ladyada]

@jps2000 no ETA

[mharper]

Sorry, folks. I was able to solve my problem by cranking up the tx power, so I haven't revisited this.

[hathach]

@mharper you have nothing to sorry about 😉😉. We are busy with usb as well. Also long range need a bit of field testing imho. We are in no hurry, still lots of other work to do.