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diff --git a/lib/OwnTracks/Waypoint.hs b/lib/OwnTracks/Waypoint.hs
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+{-# LANGUAGE DeriveAnyClass     #-}
+{-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE DerivingVia        #-}
+
+module OwnTracks.Waypoint
+-- | https://owntracks.org/booklet/tech/json/
+  (Waypoint(..)) where
+
+import           Data.Aeson
+import           Data.Aeson.Types       (Parser)
+import           Data.ByteString        (ByteString)
+import           Data.ByteString.Base64
+import           Data.Functor           ((<&>))
+import           Data.Text              (Text)
+import qualified Data.Text              as T
+import           Data.Text.Encoding     (encodeUtf8)
+import           Data.Time              (UTCTime, defaultTimeLocale, formatTime,
+                                         parseTimeM)
+import           Database.Persist
+import           GHC.Generics           (Generic)
+
+
+data Waypoint = Waypoint
+  { waypointDescription :: Text
+  -- ^ Name of the waypoint that is included in the sent transition message, copied into the location message inregions array when a current position is within a region. (iOS,Android,string/required)
+  , waypointLatitude    :: Maybe Double
+  -- ^ Latitude (iOS,Android/float/degree/optional)
+  , waypointLongitude   :: Maybe Double
+  -- ^ Longitude (iOS,Android/float/degree/optional)
+  , waypointRadius      :: Maybe Int
+  -- ^ Radius around the latitude and longitude coordinates (iOS,Android/integer/meters/optional)
+  , waypointTimestamp   :: UTCTime
+  -- ^ Timestamp of creation of region, copied into the wtst element of the transition message (iOS,Android/integer/epoch/required)
+  , waypointUUID        :: Maybe Text
+  -- ^ UUID of the BLE Beacon (iOS/string/optional)
+  , waypointBLEMajor    :: Maybe Int
+  -- ^ Major number of the BLE Beacon (iOS/integer/optional)
+  , waypointBLEMinor    :: Maybe Int
+  -- ^  Minor number of the BLE Beacon_(iOS/integer/optional)_
+  , waypointRegionId    :: Maybe Text
+  -- ^  region ID, created automatically, copied into the location payload inrids array (iOS/string)
+  } deriving (Show, Eq, Generic)
+
+instance FromJSON Waypoint where
+  parseJSON (Object o) = Waypoint
+    <$> o .: "desc"
+    <*> o .:? "lat"
+    <*> o .:? "lon"
+    <*> o .:? "rad"
+    <*> (o .: "tst" >>= parseUnixTime)
+    <*> o .:? "uuid"
+    <*> o .:? "major"
+    <*> o .:? "minor"
+    <*> o .:? "rid"
+    where parseUnixTime :: Int -> Parser UTCTime
+          parseUnixTime = parseTimeM False defaultTimeLocale "%s" . show
+
+instance ToJSON Waypoint where
+  toJSON Waypoint{..} = object
+    [ "desc" .= waypointDescription
+    , "lat" .= waypointLatitude
+    , "lon" .= waypointLongitude
+    , "rad" .= waypointRadius
+    , "tst" .= formatTime defaultTimeLocale "%s" waypointTimestamp
+    , "uuid" .= waypointUUID
+    , "major" .= waypointBLEMajor
+    , "minor" .= waypointBLEMinor
+    , "rid" .= waypointRegionId
+    ]