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--- humidity_monitoring [2017/05/19 10:20] – created tomgle
+++ humidity_monitoring [2017/06/09 10:32] (current) – tomgle
@@ Line 2: / Line 2: @@
 The crawl space temperature and humidity are monitored via a DHT-22 probe dangling from the joists.  This passes through the floor into the control room where it is attached to a Huzzah gathering Temperature and Humidity and sending the data via WiFi to the MQTT broker.\\
-The monitor is pictured here:{{::crawl_space_monitor.jpg|}}\\
+The MQTT topics are on Google Docs in the following spreadsheet:\\
+[[https://docs.google.com/spreadsheets/d/1fnR15K5wrnArtJH7ZCU0acrIlH9RIHi7XJ_q_XNXhys/edit#gid=0|Google Docs Topic definitions]]\\
+The monitor is pictured here:\\
+{{::crawl_space_monitor.jpg|}}\\
+Wiring the DHT device:\\
+Color code used:  VDD = white/brown stripe, Data = blue, Common = brown\\
+V+ is shown as VDD below.\\
+{{:info:dht22_hookup.jpg|}}
-The topics are on Google Docs in the following spreadsheet: