Zigbee TxPower setting

[sjf]

Hi,

I'm trying to increase Zigbee Tx Power to +8dBm by using the function nrf_802154_tx_power_set().

Digging into the code, I see that it is calling nrf_802154_pib_tx_power_set() and that it just sets the variable m_data.tx_power. But It does not seem that any other action is taken.

Here my questions about this topic:

1. What is the command to set Zigbee Tx Power without SoftDevice?

2. What is the command to set Zigbee Tx Power with SoftDevice?

3. When does the Zigbee Tx Power has to be set? Before starting Zigbee Stack?

Thanks in advance.

Regards,

S

[Edvin]

Hello,

If you want to change the output power with the zigbee stack, you should use that function, nrf_802154_tx_power_set(). This function is implemented in the 802.15.4 library that the zboss stack uses, located in external/zboss/lib/keil/nrf52833/nrf_radio_driver.lib (or equivalent, depending on what IDE you are using.

How do you determine that nothing happens?

Best regards,

Edvin

[sjf]

Hi, 

I'm calling nrf_802154_tx_power_set() with 0, 8 and -8 before and after starting the stack on the coordinator and on the end device.

When calling the function zb_zdo_get_diag_data() on both sides, It always return the same range of values (-60 aprox) no matter the tx power setting....

[sjf]

By the way, the value retrieved by nrf_802154_tx_power_get() is always 8 even when nrf_802154_tx_power_set()  is called with another parameter. 

[Edvin]

I just tested this, but I don't get the same behavior as you. I tested both examples with and without the softdevice.

Try to add the following snippet, and monitor the log:

    int8_t power = nrf_802154_tx_power_get();
    NRF_LOG_INFO("power: %d", power);
    power = 8;
    nrf_802154_tx_power_set(power);
    int8_t power2 = nrf_802154_tx_power_get();
    NRF_LOG_INFO("power2: %d", power2);

e.g. right before the while loop in main().

If it didn't work, how did you call nrf_802154_tx_power_get()

[sjf]

My example does not use SoftDevice. What about yours? 

[Edvin]

Edvin said:

I tested both examples with and without the softdevice.

 Both.