Hi Vikrant,

 

As I said before:

«Feel free to supply the correct h/w Tx Power enumeration to callers of https://github.com/zephyrproject-rtos/zephyr/blob/master/subsys/bluetooth/controller/hal/nrf5/radio/radio.c#L112”

 

Please review the callers of “radio_tx_power_set”

 

One for sure is https://github.com/zephyrproject-rtos/zephyr/blob/master/subsys/bluetooth/controller/ll_sw/ctrl.c#L5902

 

Supply 0x08 instead of 0 as the current param.

 

Regards,

Vinayak

 

 

From: Vikrant More [mailto:vikrant8051@...]
Sent: Thursday, March 08, 2018 9:56 AM
To: Chettimada, Vinayak Kariappa <vinayak.kariappa.chettimada@nordicsemi.no>
Cc: zephyr-devel@lists.zephyrproject.org; zephyr-users@lists.zephyrproject.org; Cufi, Carles <Carles.Cufi@...>
Subject: Re: [Zephyr-users] increasing nRF52 Bluetooth range

 

Hello Vinayak,

    NRF_RADIO->TXPOWER = 0x8;  //+8dBm

    err = bt_enable(bt_ready);
    if (err) {
        printk("Bluetooth init failed (err %d)\n", err);
        return;
    }

    bt_conn_cb_register(&conn_callbacks);
    bt_conn_auth_cb_register(&auth_cb_display);

I modified power to +8 dBM as per your suggestion but didn't find any improvement in the range.

Am I missing something besides this ?

Thank You !!

 

On Thu, Mar 8, 2018 at 1:57 PM, Chettimada, Vinayak Kariappa <vinayak.kariappa.chettimada@nordicsemi.no> wrote:

Hi Vikrant,

 

The Zephyr BLE controller does not implement the Tx power set interface in the upstream code, hence Zephyr controller operates with +0dBm transmit power.

Feel free to supply the correct h/w Tx Power enumeration to callers of https://github.com/zephyrproject-rtos/zephyr/blob/master/subsys/bluetooth/controller/hal/nrf5/radio/radio.c#L112

 

nRF52840 supports +8dBm and Zephyr controller supports external power amplifiers too using the PA/LNA GPIO lines, in case you want your h/w design to have external chips to get further tx power.

 

Regards,

Vinayak

 

From: zephyr-users-bounces@lists.zephyrproject.org [mailto:zephyr-users-bounces@lists.zephyrproject.org] On Behalf Of Vikrant More
Sent: Thursday, March 08, 2018 7:53 AM
To: zephyr-devel@lists.zephyrproject.org; zephyr-users@lists.zephyrproject.org; Cufi, Carles <Carles.Cufi@...>
Subject: [Zephyr-users] increasing nRF52 Bluetooth range

 

Hello,

Recently while doing demo test in my office, I found that

range of silicon labs SoC with max. +10dbm power = 2 * range of nRF52 with max. +8 dbm power

Silicon labs demo kit was executing own stack.

 

Is this because of only +2dbm difference ?

How to increase nRF52 range by configuring Zephyr ?

Thank You !!