diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c795b05
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
index 852c02c..216b363 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "pico-keys-sdk"]
 	path = pico-keys-sdk
-	url = https://github.com/polhenarejos/pico-keys-sdk
+	url = git@github.com:fbuirey/pico-keys-sdk.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1cc83a2..497a4f5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -131,6 +131,12 @@ target_compile_options(pico_fido PUBLIC
     -Werror
     )
 
+
+if(CUST_BUTTON_PIN)
+    target_compile_definitions(pico_fido PUBLIC CUST_BUTTON_PIN=${CUST_BUTTON_PIN})
+endif()
+message(STATUS "CUST_BUTTON_PIN is set to: ${CUST_BUTTON_PIN}")
+
 string(FIND ${CMAKE_C_COMPILER} ":" COMPILER_COLON)
 if (${COMPILER_COLON} GREATER_EQUAL 0)
         target_compile_options(pico_fido PUBLIC
diff --git a/pico-keys-sdk b/pico-keys-sdk
index 05fe059..92c2f0b 160000
--- a/pico-keys-sdk
+++ b/pico-keys-sdk
@@ -1 +1 @@
-Subproject commit 05fe0596ef004313e166b1e2f900e9af351dd26c
+Subproject commit 92c2f0b4a5b46a1ae926cd2ba17878cb3f9fe702