Hello, I just bought two Arduino Nano 33 BLE boards to test the nina-306 u-blox bluetooth module. The datasheet on their website explain that this module reachs up to 1400m. I just modified two examples to create a service with one board and connect the other one by switching on a led when both boards are connected. Unfortunately the range of the connection is very short. Therefore I decided to use a nRF52840-DK board as debugger to program the boards with segger software. I chose this way because Arduino doesn't allow to change the TX power of the module in a simply way. So I downloaded the official nRF52840 FW examples.
I added the following code to the advertising init function on the central board to increase the TX power of the advertising:
sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TXPOWER);
I also added the following code to the scan init function on the peripheral board to increase the TX power of the scanning:
sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_SCAN_INIT, BLE_CONN_HANDLE_INVALID, TXPOWER);
I also added the following code to the ble_evt_handler function (connected case) on both boards to increase the TX power of the connection:
sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_CONN, p_gap_evt->conn_handle, TXPOWER);
I did the same on two nRF52840-DK boards to check the differences. Unfortunately with the evaluation boards I olny reached around 60m between the two boards on the oudside (no obstacles between them) and with the Arduino Nano 33 BLE in only reached about half the distance (around 33m). Why there is such a big difference between the two boards?
I know that 1400m is too high but I thought to reach almost 200m, is it possible with these Arduino boards?
Thank you very much