+SR_PRIV int brymen_packet_request(struct sr_serial_dev_inst *serial);
+
+SR_PRIV int brymen_packet_length(const uint8_t *buf, int *len);
+SR_PRIV gboolean brymen_packet_is_valid(const uint8_t *buf);
+
+SR_PRIV int brymen_parse(const uint8_t *buf, float *floatval,
+ struct sr_datafeed_analog *analog, void *info);
+
+SR_PRIV int brymen_stream_detect(struct sr_serial_dev_inst *serial,
+ uint8_t *buf, size_t *buflen,
+ packet_length_t get_packet_size,
+ packet_valid_callback is_valid,
+ uint64_t timeout_ms, int baudrate);