SR_PRIV int receive_data_VOLTCRAFT_VC820(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_VOLTCRAFT_VC830(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_VOLTCRAFT_VC840(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_VOLTCRAFT_VC820(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_VOLTCRAFT_VC830(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_VOLTCRAFT_VC840(int fd, int revents, void *cb_data);