Peripheral UART example show echo text, how to fix it?

RE: Peripheral UART example show echo text, how to fix it?

hmolesworth — Wed, 06 Dec 2023 06:03:24 GMT

You're welcome, thanks for letting me know it helped; trick is to enable the same feature on the peripheral and they will happily chat for hours :-)

RE: Peripheral UART example show echo text, how to fix it?

William.SportsArt — Wed, 06 Dec 2023 03:43:32 GMT

Hi,

Thank you for your reply.

You are right, the echo text was from Central.

I disabled ECHOBACK_BLE_UART_DATA and tested again, the result is as follows. (Figure 1)

Thank you.

RE: Peripheral UART example show echo text, how to fix it?

hmolesworth — Wed, 06 Dec 2023 03:28:29 GMT

Ain't the peripheral, it be central .. check this setting; central has an option to echo everything received over BLE from the peripheral back to the peripheral over BLE just as though someone sent a new command:

on Central:
    if (ECHOBACK_BLE_UART_DATA)
    {
        // Send data back to the peripheral.
        do
        {
            ret_val = ble_nus_c_string_send(&m_ble_nus_c, p_data, data_len);

RE: Peripheral UART example show echo text, how to fix it?

William.SportsArt — Wed, 06 Dec 2023 02:37:19 GMT

Hi Jorgen,

Thank you for your reply.

I'm using examples from the SDK without any modifications.

I tried switching central & peripheral firmware to both development boards, and the echo text issue was also switched.

Thus, the echo text issue happens in the peripheral firmware.

How does peripheral firmware have this issue? How to fix it?

Thank you.

RE: Peripheral UART example show echo text, how to fix it?

Jørgen Holmefjord — Tue, 05 Dec 2023 12:45:33 GMT

Hi,

Are you using the examples from the SDK without any modifications?

Have you tried switching which board runs which firmware, to see if the behavior follows the FW or the board?

I'm not familiar with this serial terminal software, but some softwares have a feature to local echo text, is this enabled in one of the terminals but not the other?

Best regards,
Jørgen