diff --git a/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerDoc.java b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerDoc.java
new file mode 100644
index 0000000..cab7823
--- /dev/null
+++ b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerDoc.java
@@ -0,0 +1,61 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * @author bertrik
+ *
+ */
+public abstract class ListenerDoc {
+
+    private final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+    private final JsonNodeFactory factory = new JsonNodeFactory(false);
+
+    private final String type;
+    private final Date date;
+
+    /**
+     * Constructor.
+     * 
+     * @param type the document type
+     * @param date the date
+     */
+    protected ListenerDoc(String type, Date date) {
+        this.type = type;
+        this.date = date;
+    }
+
+    /**
+     * @return the JSON representation
+     */
+    public String format() {
+        final ObjectNode topNode = factory.objectNode();
+        topNode.set("type", factory.textNode(type));
+        topNode.set("time_created", factory.textNode(dateFormat.format(date)));
+        topNode.set("time_uploaded", factory.textNode(dateFormat.format(date)));
+        topNode.set("data", createDataNode());
+
+        return topNode.toString();
+    }
+
+    /**
+     * @return the json node factory
+     */
+    protected final JsonNodeFactory factory() {
+        return factory;
+    }
+
+    /**
+     * Creates the sub-type specific 'data' part of the listener doc.
+     * 
+     * @return the 'data' node contents
+     */
+    abstract JsonNode createDataNode();
+
+}
diff --git a/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInformationDoc.java b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInformationDoc.java
new file mode 100644
index 0000000..6020ea7
--- /dev/null
+++ b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInformationDoc.java
@@ -0,0 +1,33 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Listener information doc.
+ */
+public final class ListenerInformationDoc extends ListenerDoc {
+
+	private final String callSign;
+
+	/**
+	 * Constructor.
+	 * 
+	 * @param date the date
+	 * @param callSign the listener call sign
+	 */
+	public ListenerInformationDoc(Date date, String callSign) {
+		super("listener_information", date);
+		this.callSign = callSign;
+	}
+
+	@Override
+	protected JsonNode createDataNode() {
+		final ObjectNode node = factory().objectNode();
+		node.set("callsign", factory().textNode(callSign));
+		return node;
+	}
+	
+}
diff --git a/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDoc.java b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDoc.java
new file mode 100644
index 0000000..6c7ec13
--- /dev/null
+++ b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDoc.java
@@ -0,0 +1,38 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import nl.sikken.bertrik.hab.habitat.IHabReceiver;
+
+/**
+ * Listener telemetry doc.
+ */
+public final class ListenerTelemetryDoc extends ListenerDoc {
+
+	private final IHabReceiver receiver;
+
+	/**
+	 * Constructor.
+	 * 
+	 * @param date the date
+	 * @param receiver the receiver info
+	 */
+	public ListenerTelemetryDoc(Date date, IHabReceiver receiver) {
+		super("listener_telemetry", date);
+		this.receiver = receiver;
+	}
+
+	@Override
+	protected JsonNode createDataNode() {
+		final ObjectNode node = factory().objectNode();
+		node.set("callsign", factory().textNode(receiver.getCallsign()));
+		node.set("latitude", factory().numberNode(receiver.getLocation().getLat()));
+		node.set("longitude", factory().numberNode(receiver.getLocation().getLon()));
+		node.set("altitude", factory().numberNode(receiver.getLocation().getAlt()));
+		return node;
+	}
+
+}
diff --git a/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/PayloadTelemetryDoc.java b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/PayloadTelemetryDoc.java
new file mode 100644
index 0000000..8fedf3e
--- /dev/null
+++ b/workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/docs/PayloadTelemetryDoc.java
@@ -0,0 +1,60 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * @author bertrik
+ *
+ */
+public final class PayloadTelemetryDoc {
+	
+	private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+	
+	private final String callSign;
+	private final byte[] rawBytes;
+	private final Date dateCreated;
+	private final Date dateUploaded;
+
+	/**
+	 * Constructor.
+	 * @param date the date
+	 * @param callSign the receiver call sign
+	 * @param rawBytes the raw telemetry string as bytes
+	 */
+	public PayloadTelemetryDoc(Date date, String callSign, byte[] rawBytes) {
+		this.callSign = callSign;
+		this.rawBytes = rawBytes;
+		this.dateCreated = date;
+		this.dateUploaded = date;
+	}
+
+	/**
+	 * @return the payload telemetry doc as JSON string
+	 */
+	public String format() {
+		final JsonNodeFactory factory = new JsonNodeFactory(false);
+		final ObjectNode topNode = factory.objectNode();
+		
+		// create data node
+		final ObjectNode dataNode = factory.objectNode();
+		dataNode.set("_raw", factory.binaryNode(rawBytes));
+		
+		// create receivers node
+		final ObjectNode receiverNode = factory.objectNode();
+		receiverNode.set("time_created", factory.textNode(dateFormat.format(dateCreated)));
+		receiverNode.set("time_uploaded", factory.textNode(dateFormat.format(dateUploaded)));
+		final ObjectNode receiversNode = factory.objectNode();
+		receiversNode.set(callSign, receiverNode);
+		
+		// put it together in the top node
+		topNode.set("data", dataNode);
+		topNode.set("receivers", receiversNode);
+
+		return topNode.toString();
+	}
+}
diff --git a/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInfoDocTest.java b/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInfoDocTest.java
new file mode 100644
index 0000000..8e2f90a
--- /dev/null
+++ b/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerInfoDocTest.java
@@ -0,0 +1,25 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.util.Date;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Unit tests for ListenerInfoDoc
+ */
+public final class ListenerInfoDocTest {
+	
+	/**
+	 * Verifies basic formatting.
+	 */
+	@Test
+	public void testFormat() {
+		final Date date = new Date();
+		final ListenerInformationDoc doc = new ListenerInformationDoc(date, "BERTRIK");
+		final String json = doc.format();
+		
+		Assert.assertNotNull(json);
+	}
+
+}
diff --git a/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDocTest.java b/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDocTest.java
new file mode 100644
index 0000000..a34e9d8
--- /dev/null
+++ b/workspace/ttnhabbridge/src/test/java/nl/sikken/bertrik/hab/habitat/docs/ListenerTelemetryDocTest.java
@@ -0,0 +1,43 @@
+package nl.sikken.bertrik.hab.habitat.docs;
+
+import java.util.Date;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import nl.sikken.bertrik.hab.habitat.IHabReceiver;
+import nl.sikken.bertrik.hab.habitat.Location;
+
+/**
+ * Unit tests for ListenerTelemetryDoc.
+ */
+public final class ListenerTelemetryDocTest {
+
+	/**
+	 * Verifies basic formatting.
+	 */
+	@Test
+	public void testFormat() {
+		final Date date = new Date();
+		final IHabReceiver receiver = createHabReceiver("BERTRIK", new Location(1.23, 4.56, 7.8));
+		final ListenerTelemetryDoc doc = new ListenerTelemetryDoc(date, receiver);
+		final String json = doc.format();
+
+		Assert.assertNotNull(json);
+	}
+
+	private IHabReceiver createHabReceiver(String callSign, Location location) {
+		return new IHabReceiver() {
+			@Override
+			public Location getLocation() {
+				return location;
+			}
+
+			@Override
+			public String getCallsign() {
+				return callSign;
+			}
+		};
+	}
+
+}