diff --git a/wip/topic b/wip/topic
deleted file mode 100644
index 6d99061..0000000
--- a/wip/topic
+++ /dev/null
@@ -1,15 +0,0 @@
-moip/channel/name
-             mopp/
-moip/channel/name
-             cwcom/
-
-moip/channel/name
-             durations/
-
-moip/listchannels
-
-"durations": [60, -60, 180, -60, 180, -60]
-... WIP
-
-channel = mtc.kob..._wire1
-channel = udp_mopp.... 
diff --git a/wip/topic.md b/wip/topic.md
new file mode 100644
index 0000000..031ed46
--- /dev/null
+++ b/wip/topic.md
@@ -0,0 +1,67 @@
+
+# JSON Payload Documentation
+
+## Outline
+
++ version: protocol version
++ sender: optional string with name of sender
++ receiver: optional string with name of receiver
++ at least one of the three 
+  1. raw_payload_mopp: optional mopp encoded binary data
+  2. raw_payload_cwcom: optional cwcom encoded binary data
+  3. durations: optional int-array with durations of the individual morse signals
++ wpm: optional integer with words-per-minute
++ relayed: optional string with name of the server, where this packes has been relayed from
++ channel: optional string with name of the channel / frequency / wire
+
+## Version 1
+
+The payload for version 1 has the following structure:
+
+```json
+{
+  "version": 1,
+  "raw_payload_mopp": "Base64 of encoded raw MOPP data",
+  "durations": [60, -60, 180, -60, 380, -60],
+}
+```
+
+## Versions later
+
+```json
+{
+  "version": 2,
+  "sender": "Optional string with name of the sender",
+  "receiver": "Optional string with name of the receiver",
+  "raw_payload_mopp": "Base64 of encoded raw MOPP data",
+  "raw_payload_cwcom": "Base64 of encoded raw CWCom data",
+  "durations": [60, -60, 180, -60, 380, -60],
+}
+```
+
+
+
+# WIP Channels
+
+
+moip/channel/name
+             mopp/
+moip/channel/name
+             cwcom/
+
+moip/channel/name
+             durations/
+
+moip/listchannels
+
+"durations": [60, -60, 180, -60, 180, -60]
+... WIP
+
+mosquitto_pub -h broker.hivemq.com -t  /moip/udp2mqtt/durations -m '{ "durations": [60, -60, 180, -60, 380, -60] }'
+
+
+
+
+channel = mtc.kob..._wire1
+channel = udp_mopp.... 
+