protocol.h

typedef enum {
	PROTO_UPLOAD_IN_PROGRESS = 0,
	PROTO_UPLOAD_DONE,
	PROTO_UPLOAD_FAILED,
	PROTO_UPLOAD_NO_CONNECTION
} proto_upload_status_t;

typedef struct {
    uint8_t data_id;
    proto_upload_status_t status;
    uint32_t transmitted_size;
} proto_upload_info_t;

/**
Sending:
data_id			0				0x00
status			PROTO_UPLOAD_NO_CONNECTION	0x03
transmitted_size	0				0x00

Receiving:
data_id			0				0x00
status			PROTO_UPLOAD_IN_PROGRESS	0x00
transmitted_size	3				0x03
*/