--- a/README.design	Tue Dec 10 20:13:00 2019 +0100
+++ b/README.design	Fri Dec 13 16:49:50 2019 +0100
@@ -66,3 +66,19 @@
 
 https://github.com/beerjson/beerjson
 
+
+--- iSpindel ---
+MQTT mode: 
+ ispindel/<name>/tilt Tilt
+ ispindel/<name>/temperature 20.1250
+ ispindel/<name>/temp_units C
+ ispindel/<name>/battery Volt
+ ispindel/<name>/gravity Gravity
+ ispindel/<name>/interval 900
+ ispindel/<name>/RSSI WiFi.RSSI()
+
+Default name: "iSpindel000"
+
+When data is received add a timestamp.
+What about add data to a fermenter. Assign a ispindel?? 
+