nRF52840 device ERROR 12290 when device out of range

RE: nRF52840 device ERROR 12290 when device out of range

masterLee — Wed, 14 Apr 2021 07:25:12 GMT

Hi Amanda,

I will try your suggestion. By the way, in case someone finds it helpful I found an other "solution" with this issue.

Before I transmit a new packet I read the rssi value and if it is for example < -95 dBm I don't transmit to the central.

So, no data are sent when the connection signal strength is very weak (and probably about to be lost). I know that this solution is not the best because it limits the range of transmission but it works for now.

Thank you for your time

RE: nRF52840 device ERROR 12290 when device out of range

Amanda Hsieh — Tue, 13 Apr 2021 12:32:53 GMT

Hi Kostoulas,

ERROR 12290 is 0x3002 in hex, which corresponds to BLE_ERROR_INVALID_CONN_HANDLE. It seems that you got into the function that tries to send the data before the disconnect happened and invalidated the connection handle with a faster sample rate, while with a slow sample rate you have not yet seen the issue as it is less likely to happen.

You should anyway handle the error in a better way than passing it to the error handler, i.e.,

if(err_code != BLE_ERROR_INVALID_CONN_HANDLE)
{
  APP_ERROR_CHECK(err_code);
}

-Amanda H.