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niels5750
Level 1
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Level 1

Hi,

we are doing an ble mesh application using CYBT-483056-02. In the  Vendor Specific example it is possible to set the tx power (wiced_bt_mesh_core_adv_tx_power) in the range 0-4 (5 steps). How does these 5 steps map into tx power in dBm?

Best regards,
Niels

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1 Solution
AnjanaM_61
Moderator
Moderator First comment on KBA 5 questions asked First question asked
Moderator

Hello @niels5750 

Please find the test results from our HW team: 

The following table lists CYBT-483056-02 “tx_power” with different “wiced_bt_mesh_core_adv_tx_power” value (0~4).

Application: Mesh_Snip_Vendor_Specific

wiced_bt_mesh_core_adv_tx_power

0

1

2

3

4

Tx power (dBm)

8

11

17

19

19

Note : 

Please note that the value of TX power may be varied due to SMA connector soldering, cable loss difference, etc.  1-2 dB difference is reasonable. 

Regards,
Anjana

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4 Replies
AnjanaM_61
Moderator
Moderator First comment on KBA 5 questions asked First question asked
Moderator

Hello @niels5750 ,

For the API wiced_bt_mesh_core_adv_tx_power -  0 means minimum power and 4 is the max. Actual power table is on the controller. 

The max tx power for this module is 20dBm -  https://www.cypress.com/file/511686/download 

The module uses CYW20719B2 module for which the minimum Tx power value is near to -22 dB . https://community.infineon.com/t5/Resource-Library/CYW20719B2-Product-Guide/ta-p/251238 

Please let me know if it is critical for you to get the exact power table values.

Regards,
Anjana 

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niels5750
Level 1
5 sign-ins First reply posted First question asked
Level 1

Hi Anjana,

Thank you very much for your answer.

A relationship between dBm and wiced_bt_mesh_core_adv_tx_power  setting would be nice to know, but frankly I just need to know which wiced_bt_mesh_core_adv_tx_power setting I can use and still comply to the ETSI norm here in Europe.

Best regards,
Niels Andersen
Elcanic A/S

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AnjanaM_61
Moderator
Moderator First comment on KBA 5 questions asked First question asked
Moderator

Hello @niels5750 

We are checking this internally. Will update you asap.

Regards,

Anjana

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AnjanaM_61
Moderator
Moderator First comment on KBA 5 questions asked First question asked
Moderator

Hello @niels5750 

Please find the test results from our HW team: 

The following table lists CYBT-483056-02 “tx_power” with different “wiced_bt_mesh_core_adv_tx_power” value (0~4).

Application: Mesh_Snip_Vendor_Specific

wiced_bt_mesh_core_adv_tx_power

0

1

2

3

4

Tx power (dBm)

8

11

17

19

19

Note : 

Please note that the value of TX power may be varied due to SMA connector soldering, cable loss difference, etc.  1-2 dB difference is reasonable. 

Regards,
Anjana