How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

RE: How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

haakonsh — Fri, 18 Aug 2023 11:31:58 GMT

Can you share your code?

And what are the params your are trying to update to?

RE: How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

Aaron_BC — Thu, 17 Aug 2023 21:53:12 GMT

I have successfully received packets with CODED_PHY modulation in my project using this example as a guide: https://github.com/jimmywong2003/nrf52811-ble-long-range-demo . However, I am now seeing an error occur occasionally while testing at long range in the ble_evt_handler() at BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST event, where

ret_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(ret_code);

returns me error code NRF_ERROR_INVALID_STATE. Most of the time this function gets called successfully, but sometimes at long range, around -90 db rssi, the app_error_check fails and causes a soft reset.

RE: How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

haakonsh — Thu, 17 Aug 2023 08:39:44 GMT

Can you share your code or the content of the parameters sendt to sd_ble_gap_adv_set_configure?

RE: How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

Aaron_BC — Mon, 14 Aug 2023 21:08:08 GMT

I have set these parameters in my ble_advertising_start() function:

p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;

p_advertising->adv_modes_config.ble_adv_secondary_phy = BLE_GAP_PHY_CODED;

p_advertising->adv_params.primary_phy = BLE_GAP_PHY_CODED;

p_advertising->adv_modes_config.ble_adv_extended_enabled = true;

I am now getting an error when calling sd_ble_gap_adv_set_configure(), with return code == 7, which I believe to be NRF_ERROR_INVALID_PARAM.

RE: How to enable BLE long range mode (125 KBPS) on central and peripheral with nrf52840 and sdk 15.3.0?

haakonsh — Thu, 10 Aug 2023 13:28:40 GMT

If the peripheral does not advertise with CODED_PHY modulation then a central using CODED_PHY modulation will not be able to receive any packets.

See: sd_ble_gap_adv_set_configure, ble_gap_adv_params_t, primary_phy/secondary_phy, and ble_advertising_modes_config_set.