CC2642R: How to modify the tx power in real time?

user5292307

Prodigy 150 points

Part Number: CC2642R
Other Parts Discussed in Thread: SYSCONFIG, ENERGYTRACE

hi all,

i can change tx power by call HCI_EXT_SetTxPowerCmd() In SimplePeripheral_init().

but i call HCI_EXT_SetTxPowerCmd() after adv, RSSI will not change.

I want to change the tx power in real-time without reboot. Is there any function I can use?

SDK simplelink_cc13x2_26x2_sdk_4_10_00_78

Demo: simple_peripheral_oad_onchip

over 3 years ago

0 Ammar N over 3 years ago

TI__Mastermind 25810 points

Hello,

This API should work in real time. What status does the API return? Things you can try:

Use HCI_LE_ReadTxPowerCmd() to read after setting.
First verify that the TX Power changes when setting the TX power in SysConfig.

I've assigned an expert to follow up.

See the following related posts:

https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/482692?CC2640-HCI-EXT-SetTxPowerCmd-failing-to-set-TX-Power

https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/839904#pi320995=2

https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/803951?RTOS-LAUNCHXL-CC26X2R1-How-to-set-the-CC2642-TX-Power

0 user5292307 over 3 years ago in reply to Ammar N

Prodigy 150 points

Hi Ammar N,

HCI_EXT_SetTxPowerCmd works fine.

I change txpower by call HCI_EXT_SetTxPowerCmd , then msut reopen adv.

call HCI_LE_ReadTxPowerCmd() only get max txpower and min txpower, can't get current tx power.

0 Jenny T over 3 years ago in reply to user5292307

TI__Expert 4435 points

Hello,

As Ammar has stated I believe this API should work in real time too. Do you have access to a power analyzer that might help confirm the modification in TX power? In addition another test you can do is modify the TX power and use EnergyTrace (under the Tools tab in CCS) to visualize changes in current and power consumption. Note that this will not display the TX power specifically, but the energy measurements of the device as a whole. Large changes in TX power might also effect these measurements. However, I still strongly recommend using a power analyzer to verify that your TX power has successfully changed. Thanks!

Best Regards,

Jenny

Bluetooth®︎

Bluetooth forum

CC2642R: How to modify the tx power in real time?