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927***950
Hello,
I’m currently developing a program for the GR5513BENDU processor and encountering an issue with the Bluetooth Low Energy (BLE) transmit power setting. I’m attempting to set the maximum transmit power to 7 dBm using the ble_gap_tx_power_set function. However, when I read back the power using the ble_gap_tx_power_get function, it returns a value of 4 dBm. For some reason, I’m unable to set the power higher than 4 dBm.
Has anyone else faced this issue or can provide insight into why the transmit power cannot be set above 4 dBm despite the function allowing for a higher value?
Any help or suggestions would be greatly appreciated.
Thank you!
zhongchengzhi
Hi,
1. What's your SDK version?
2. did you set the advertising or connetion TX power level?
927***950
Hi,
ble_gap_tx_power_set(BLE_GAP_ACTIVITY_ROLE_ADV, 0, 7) and ble_gap_tx_power_set(BLE_GAP_ACTIVITY_ROLE_CON, 0, 7)I'm using make for building the project.
zhongchengzhi
Hi, have you tried the 3 dBm, what will happen?
927***950
In both modes, when setting the BLE transmission power to 3dBm, the function ble_gap_tx_power_get returns 3.
zhongchengzhi
Hi,
1. Is your chip calibrated? Could you dump "int16_t tx_power_offset" this variable?
2. You can use the instrument to measure the output power level, if the measured Tx power level is OK, you can ignore the ble_gap_tx_power_get return value.
927***950
1) I do not know if my chip is calibrated. The dump of the int16_t tx_power_offset variable returns 0x0000.
2) Unfortunately, I do not have a device for measuring the output power
zhongchengzhi
Could you use the attachment file replace the ble_app_cts example same name file, compile and run, then show me the log?
927***950
APP_I: Goodix BLE SDK V2.0.1 (commit 3b19832f)
APP_I: Local Board EA:CB:3E:CF:00:05.
APP_I: Current Time example started.
APP_D: (First tx_power_offset: 0)ADV status: 00, error: 0
APP_D: First error_code: 0, tx_pwr: 7
APP_D: (Second tx_power_offset: 12)ADV status: 00, error: 0
APP_D: Second error_code: 0, tx_pwr: 4
APP_D: (Third tx_power_offset: 0)ADV status: 00, error: 0
APP_D: Third error_code: 0, tx_pwr: 7
APP_I: (tx_power_offset: 0)status: 0, tx_pwr: 7
APP_I: (tx_power_offset: 0)status: 0, tx_pwr: 7
APP_I: (tx_power_offset: 0)status: 0, tx_pwr: 7
APP_I: (tx_power_offset: 0)status: 0, tx_pwr: 7
zhongchengzhi
I see the ble_gap_tx_power_get return value is 7 dBm, not you said 4 dBm, so what's the difference?
927***950
Yes, I can see that in the ble_app_cts project, setting the output power to 7 dBm is working. However, in my project, it's giving such logs:
(First tx_power_offset: 0)ADV status: 00, error: 0
First error_code: 0, tx_pwr: 4
(Second tx_power_offset: 12)ADV status: 00, error: 0
Second error_code: 0, tx_pwr: 1
(Third tx_power_offset: 0)ADV status: 00, error: 0
Third error_code: 0, tx_pwr: 4I don't see a significant difference in the configuration of these two projects yet.
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