Corrected PDF kinbk and started Digital Outputs

Author: swatzy

www/en/modules/ROOT/pages/grove-digital-outputs.adoc

@@ -4,7 +4,7 @@
 .Overview
 :page-toclevels: 2
 ****
-This example uses the grove button module but the source code is also applicable for other similar Grove Modules.
+This example uses the LED module and the Relay module, the source code is also applicable for other similar Grove Modules.
 
 The GPIO Pins used are [D16,D17],[D18,D19],[D20,D21]
 
@@ -16,7 +16,9 @@ image::GroveDigitalConnectionsPico.png[]
 .Hardware Details
 :page-toclevels: 2
 ****
-https://wiki.seeedstudio.com/Grove-Dual-Button/#features[Grove Dual Button]
+https://wiki.seeedstudio.com/Grove-Red_LED/[Grove LED]
+
+https://wiki.seeedstudio.com/Grove-Relay/[Grove Relay]
 ****
 
 .Demo Video

www/en/modules/ROOT/pages/index.adoc

@@ -1,19 +1,15 @@
 = Course overview
 
-In this section, add:
+This material is aimed at providing examples employing the CTI firmware, mainly implemented using the Grove platform. 
 
-- an overview of the content
-- the goals
-- the people targeted
-- the prerequisite knowledge
-- the recommended courses to take before and after
+The focus is to provide enough toys to enable a prospective engineer or hobbyist to start building things.
 
-NOTE: This page is the entry point of the course. 
+Some Electronics knowledge would be useful, but hopefully the wealth of material available for these platforms can fill in the gaps. Videos will be provided to offer some real-world experience.
 
 == Download
 
 // do not include the PDF download link in the PDF itself. See 
 
 ifeval::["{backend}" != "pdf"]
-* {site-url}/{page-component-name}/{page-component-version}/{page-component-name}.pdf[PDF version of the course]
+* {site-url}/{page-component-name}/{page-component-version}/_exports/{page-component-name}.pdf[here]
 endif::[]