diff --git a/readme.md b/readme.md
index 09ef9e1..794406b 100644
--- a/readme.md
+++ b/readme.md
@@ -2,9 +2,11 @@ V Box
 =====
 custom boxmod chipset from scratch
 
+[firmware](https://figureslibres.io/gitea/bachir/vbox-firmware)
+
 # schematic
 
-![schematics](./schematics-v0.2.png)
+![schematics](./schematics-v0.3.1.png)
 
 # 3D
 ![front](./boxmod-3Dview-front.png)
diff --git a/schematics-v0.3.1.pdf b/schematics-v0.3.1.pdf
new file mode 100644
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