diff --git a/Projects-using-ArduinoJson.md b/Projects-using-ArduinoJson.md
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--- a/Projects-using-ArduinoJson.md
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@@ -155,4 +155,10 @@ by Lieven Merckx
 
 * https://sites.google.com/site/limero314/esp8266-to-stm32
 
-![](https://sites.google.com/site/limero314/_/rsrc/1471561415630/esp8266-to-stm32/WiBo%20prototype.JPG?height=240&width=320)
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+![](https://sites.google.com/site/limero314/_/rsrc/1471561415630/esp8266-to-stm32/WiBo%20prototype.JPG?height=240&width=320)
+
+# DRO<img src="https://raw.githubusercontent.com/devinrayolsen/DRO-Matic/development/images/hydro-hyphen.png" width="64">Matic OS
+
+> An Arduino based hydroponics Operating System built for any scale hydroponic farm that wants to fully automate nutrient and PH dosing. The DRO-Matic (automatic hydroponics) has been built to allow users to create, configure and share projects called "crops" by interfacing with an external MicroSD card. A single DRO-Matic crop disk size (SD card) can very, but in extreme instances large crop configurations were found to be under 3MB.
+
+* https://github.com/devinrayolsen/DRO-Matic
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