diff --git a/docs/protocol_gpio.md b/docs/protocol_gpio.md
new file mode 100644
index 0000000..e69de29
diff --git a/rpc/gpio.go b/rpc/gpio.go
new file mode 100644
index 0000000..9ab1e3e
--- /dev/null
+++ b/rpc/gpio.go
@@ -0,0 +1 @@
+package rpc