calc stddev :param data: input array :type data: NDArray[Shape["*"], Float64] :return: stddev :rtype: float

send string to a board, use this method carefully and only if you understand what you are doing

<summary> send string to a board, use this method carefully and only if you understand what you are doing </summary> <param name="config"></param>

Use this method carefully and only if you understand what you are doing, do NOT use it to start or stop streaming

send string to a board, dont use it

<summary> send raw bytes to device, dont use it </summary> <param name="bytes"></param>

if you use this board as a reference, more likely you dont need to implement this method

some devices may implement it but there is no requirement to have this method and we do not recommend anybody to use it

Use this method carefully and only if you understand what you are doing.

* Get the conjugate of the complex number * @returns The conjugate of the complex number: a + (-bi)