DEFAULT_DISTANCE = 50

TAG = "tag"
COORD = "coord"
ACROSS = "across"
CAL_NUM = "cal_num"
RECORD = "record_time"
DIST_MES = "dist_mes"
HEART_RATE = 'heart_rate'
BLOOD_OXYGEN = 'blood_oxygen'
ANCHOR = "anchor"
ANCHOR_ID = "anchor_id"
DIST = "distance"
RSSI = "rssi"
RELIABILITY = "reliability"
LAST_RECORD_TIME = "last_record_time"
IS_SUCCESSFUL = "is_successful"
FORGOT_TIME = 0.7
FILTER_DISTANCE = 1500
ACROSS_DISTANCE = 500
FILTER_RSSI = -85
ACROSS_RSSI = -80


MODE_DETECT = "det"
MODE_POSITIONING = "pos"
MODE_FREE = "fre"