NRF_ERROR_INVALID_STATE before android app (central) connected to peripheral ble 52832

[zap]

I am sorry to ask a stupid question as i supposed to fix firmware issue with my zero knowledge.

Before android app (central) connected to peripheral ble 52832, If I press/touch watch sensor, I got NRF_ERROR_INVALID_STATE error and then firmware stopped working.

But after connection is established between devices, it is working. Only the issue occur before connection is made.

I use external driver st7735, nrf52832, pca10040 board, sdk 15.3, s132 and ses arm 4.22.

I want to do is to keep firmware working until connection is made ( to ignore event from the sensor unless the connection is made between android app and peripheral ble device).

Is there a possible way to prevent that case?

[Simon]

I think the reason you are getting this error is because you are trying to notify a value without a valid connection. Since notifications are only supported while connected, you will get an error.

A solution for this could be to simply ignore the error, like it's done in the ble_app_uart peripheral example:

err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
    if ((err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != NRF_ERROR_RESOURCES) &&
        (err_code != NRF_ERROR_NOT_FOUND))
    {
        APP_ERROR_CHECK(err_code);
    }

Best regards,

Simon

[zap]

I cannot find ble_app_uart in project

[Simon]

It is located here: nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_uart

[zap]

Hi simon, I only use ble_app_proximity example project.