var (
ErrNoCode = errors.New("can not process request: switch has no code entry")
ErrBlocked = errors.New("can not process request now: sender busy")
ErrDisabled = errors.New("hardware is currently disabled")
)
If the sender's hardware is not blocked, the code corresponding to the function's input is sent
Returns an error if the sender is uninitialized or the switch has no entry in the config file