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Hi,
Can you please provide the command to set BLE TX Power on CYW43455 module?
When we ran below command for reading the LE_Read_Advertising_Channel_Tx_Power we are observing 12dbm.
hcitool -i hci0 cmd 0x08 0x0007
< HCI Command: ogf 0x08, ocf 0x0007, plen 0
> HCI Event: 0x0e plen 5
01 07 20 00 0C
btmon output:
< HCI Command: LE Read Advertising... (0x08|0x0007) plen 0 #1 [hci0] 32.775675
> HCI Event: Command Complete (0x0e) plen 5 #2 [hci0] 32.776624
LE Read Advertising Channel TX Power (0x08|0x0007) ncmd 1
Status: Success (0x00)
TX power: 12 dbm (0x0c)
Can we decrease the Tx Power while advertising the Data ?
CYW4343W HCI Vendor Specific Command to set BLE TX Power
In above link SheetalJ_96 mentioned below information:
"The output power level for BLE is fixed; It is set to 4dBm for adv packets."
But we are observing 12 dbm. Is there any way to decrease the TX Power ?
GauravS_31 SheetalJ_96 DheerajP_41 VictorZ_46 VinayakS_26
Solved! Go to Solution.
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Hi,
Sorry for the delayed response.
To modify the Tx Power of this chip, you will have to open a Salesforce case (Login | Salesforce ), and need to attach a request document (CRRQ) with all the Tx power requirements filled. Our Engineers will tune the power based on the document in the FW files and release it to you.
Thanks,
-Dheeraj
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HI,
Could you please try Set_Transmit_Power command (OCF=0x026, OGF=0x3F) command.
Please check the tread. CYBT-423028-02 BT module (CYW20719 radio): How can transmit power be controlled?
I believe the Tx power table start from 12 dbm.
Thanks,
-Dheeraj
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Hello DheerajP_41,
Thank you for your response.
Note: We are trying to Configure Tx Power of BLE in Advertising mode.
Steps Followed:
1. hciattach /dev/ttyS1 bcm43xx 3000000 flow -t 20
2. sleep 3
3. hciconfig hci0 up
4. Sleep 5
5. At this step trying to Set TX Power
We have tried the "Set_Transmit_Power command" but getting error as below.
Connection Handle used as 0xfe
hcitool -i hci0 cmd 0x3f 0x026 0xfe 08
< HCI Command: ogf 0x3f, ocf 0x0026, plen 2
FE 08
> HCI Event: 0x0e plen 4
01 26 FC 12
btmon output:
< HCI Command: Vendor (0x3f|0x0026) plen 2 #1 [hci0] 2.976667
fe 08 ..
> HCI Event: Command Complete (0x0e) plen 4 #2 [hci0] 2.978336
Vendor (0x3f|0x0026) ncmd 1
Status: Invalid HCI Command Parameters (0x12)
Also Tried another command to set Tx Power from below link but still not successful.
BLE tx output power control in HCI mode
Commands Used:
1. Connection Handle used as 0xfe
hcitool -i hci0 cmd 0x3f 0x1a5 0x00 04 0xfe
< HCI Command: ogf 0x3f, ocf 0x01a5, plen 3
00 04 FE
> HCI Event: 0x0e plen 4
01 A5 FD 01
btmon output:
< HCI Command: Vendor (0x3f|0x01a5) plen 3 #3 [hci0] 553.309604
00 04 fe ...
> HCI Event: Command Complete (0x0e) plen 4 #4 [hci0] 553.310783
Vendor (0x3f|0x01a5) ncmd 1
Status: Unknown HCI Command (0x01)
2. Connection Handle used as 0x00
hcitool -i hci0 cmd 0x3f 0x1a5 0x00 04 0x00
< HCI Command: ogf 0x3f, ocf 0x01a5, plen 3
00 04 00
> HCI Event: 0x0e plen 4
01 A5 FD 01
btmon output:
< HCI Command: Vendor (0x3f|0x01a5) plen 3 #5 [hci0] 1230.167687
00 04 00 ...
> HCI Event: Command Complete (0x0e) plen 4 #6 [hci0] 1230.168858
Vendor (0x3f|0x01a5) ncmd 1
Status: Unknown HCI Command (0x01)
Please help us to get commands for controlling BLE TX Power on CYW43455 module.
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Hi,
Sorry for the delayed response.
To modify the Tx Power of this chip, you will have to open a Salesforce case (Login | Salesforce ), and need to attach a request document (CRRQ) with all the Tx power requirements filled. Our Engineers will tune the power based on the document in the FW files and release it to you.
Thanks,
-Dheeraj