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diff --git a/avclan/metadata.md b/avclan/metadata.md
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--- /dev/null
+++ b/avclan/metadata.md
@@ -0,0 +1,33 @@
+# Test devices on bus:
+
+Head Unit:
+
+OE no. 86120-02380 	
+Ref no. CQ-TS7471LC 
+ID no. W58814 	  	
+Type: W58814 	  	
+Toyota code: e13 	
+Datecode: 022018 	
+Manufacturer: Panasonic 
+
+Uses addresses 0x160 and 0x190
+
+CD Changer 1
+
+Front: TM0461
+Type: 74833 	  	  	 
+OE no. 08601-00911 	  	  	 
+Ref no. CX-CS0722FC 	  	  	 
+Toyota code: e13 	  	  	 
+Datecode: 020209 	  	  	 
+Manufacturer: Panasonic
+
+Uses address 0x360
+
+CD Changer 2
+
+APPS2Car
+https://www.wiki-tech.com
+
+Uses address 0x240
+  	  	  	  	 
\ No newline at end of file