CC2540 TX Power Settings

Fabrizio Renzulli

Other Parts Discussed in Thread: CC2540

I have just bought the CC2540 Mini Development Kit and started to check some BTLE performances: operative range, data throughput, etc.

I would like to know if the currently TX power used by LL Master (USB Dongle programmed with HostTestRelease firmware) and LL Slave (KeyFob programmed with KeyFobDemo firmware) is 0dBm and if there is a way to change the default setting.

Fabrizio Renzulli.

over 13 years ago

0 Willis1 over 13 years ago

TI__Genius 17975 points

Yes, the Tx power default value is 0dBm for master and slave builds.. Use the function HCI_EXT_SetTxPowerCmd to change it. The function prototype and description can be found in hci.h.

0 El dorado over 12 years ago in reply to Willis1

Intellectual 270 points

Hi,

as far as I know, the TX powers can be set: -23dbm, -6dbm, 0 dbm and +4dbm; What If I need i.e. -10dBm tx power? Can this be done?

Regards

0 Chatto over 12 years ago in reply to El dorado

TI__Genius 12545 points

The four output power settings should be sufficient. Making a -10dBm power level would be possible, however there isn't any reason to. The current saving from a -6dBm to a -10dBm would be negligible.

0 Anna Mannila over 12 years ago in reply to Willis1

Prodigy 40 points

Where should I call this function so as not to mess anything up? From my application's init-function of from the main before starting the system?

0 Willis1 over 12 years ago in reply to Anna Mannila

TI__Genius 17975 points

If you are just changing it once, the easiest thing to do is to set it in the init-function; however the stack does allow you to change it any time (even during a connection) without causing any issues.

0 Kieron Gillespie over 10 years ago in reply to Willis1

Prodigy 30 points

What if one needs to enter in a custom value into the TXPOWER register? None of the setting provided by the API are applicable to my situation and I need to but a custom value into the TXPOWER. Is there anyway to do this in the TI BLE Stack?

0 Aleksandar Milanovic50 over 7 years ago in reply to Kieron Gillespie

Intellectual 360 points

Is there anyone who can answer this question directly ? IS THERE A WAY TO SET CC2540- txpower REGISTER TO VALUES OTHER THAN +4..0..-6..-23DB . PLEASE STOP UNSWERVING QUESTIONS BY SAYING YOU DO NOT NEED TO .. LIKE WAS THE CASE ABOVE

many thanks ...

ALEX

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CC2540 TX Power Settings