how to do simple data transfer using bluetooth serail terminal?
how to do simple data transfer using bluetooth serail terminal?
Hello,
You could use the BLE NUS peripheral and central examples to do such a transfer between your devices.
The examples will relay anything they receive over UART to their connected peer over BLE, and the peer will output the messages received over BLE out on its UART, and visa versa.
Test this according to the example documentation, and let me know if you encounter any issues or questions.
Best regards,
Karl
i go through the nsu code but which api was used to transfer the data?
venkatesha kj said:i have set the transmit power to 4dbm but in nrf connect app rssi level was -45dbm when i am near to the device will the tx power set to 4dbm or not?
No, the +4 dBm is what the radio will be outputting - so the RSSI on the receiving device will always be lower than the power it was sent with. -45 dBm is a normal value for a close device.
venkatesha kj said:and am using s140 can i set Supported tx_power values: -40dBm, -20dBm, -16dBm, -12dBm, -8dBm, -4dBm, 0dBm, +3dBm and +4dBm.
* In addition, on some chips following values are supported: +2dBm, +5dBm, +6dBm, +7dBm and +8dBm. any of the tx power level?
The possible TXPOWER levels depends on which SoC you are using, not which SoftDevice you are using. You could see which power levels are supported in the TXPOWER register of the device you are working with.
Best regards,
Karl
RSSI actually indicates the received strength right then if the transmited signal strength is 4dbm then why rssi shows -45dbm?
The RSSI is the received signal strength indicator. The signal will always be received weaker than what it was transferred as on the other side of the link.
Best regards,
Karl
err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, tx_power_level);
if tx power set to 4dbm it increases the transmission range right?
Yes, compared to +0dBm it will increase the transmission range.
Yes, compared to +0dBm it will increase the transmission range.
but it was not increased in my case?
-40dBm, -20dBm, -16dBm, -12dBm, -8dBm, -4dBm, 0dBm, +3dBm and +4dBm.
* In addition, on some chips following values are supported: +2dBm, +5dBm, +6dBm, +7dBm and +8dBm.
can i use any of the above transmission power levels for nrf52840 development kit?
venkatesha kj said:but it was not increased in my case?
It is not guaranteed - it depends on a lot of external factors in the environement.
venkatesha kj said:can i use any of the above transmission power levels for nrf52840 development kit?
You can use the values specified as valid for the TXPOWER register in the documentation for the SoC you are working with, which I linked earlier.
Best regards,
Karl
how to check the rssi level of the central device in the pheripheral device?
i want to scan the central device and check the rssi level of the central device how do i do that?