Notification/Indication calback with content containing "0d"

[Fredovsky]

A BLE device sends through indications or notifications a message of the following type : 76 40 0d 33 43 33 34 36 34 20

Because the message contains "0d", the callback parameter length is wrong (2 instead of 10 in this example), and I am unable to display the full message using :

void notifyCB(NimBLERemoteCharacteristic* pRemoteCharacteristic, uint8_t* pData, size_t length, bool isNotify){
    std::string str = "Message = " + std::string((char*)pData, length);
    Serial.println(str.c_str());
}

I am using the code from the NimBLE_Client example.

Any help appreciated.

[Fredovsky]

Issue fixed using the following :

for(uint8_t i = 0; i<length; i++)
    {
        Serial.print(" ");
        Serial.printf("%02x", pData[i]); // Prints 2 digits hex value

    }

Variable length is correct, just the std::string((char*)pData, length) returns a truncated string if it contains 0d

[chegewara]

Actually this is the problematic line Serial.println(str.c_str());