diff --git a/doc/imu/AK8975.pdf b/doc/imu/AK8975.pdf
new file mode 100644
index 0000000..95109b5
Binary files /dev/null and b/doc/imu/AK8975.pdf differ
diff --git a/src/main.c b/src/main.c
index e8ef969..20839b6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,7 +16,7 @@ static int usage(void) {
   return -1;
 }
 
-static void i2c_scanner(struct mgos_i2c *i2c, bool dumpregs) {
+void i2c_scanner(struct mgos_i2c *i2c, bool dumpregs) {
   int i;
 
   if (!i2c) {
@@ -118,7 +118,6 @@ int main(int argc, char **argv, char **environ) {
   tests_destroy();
 
   return 0;
-
   (void)argc;
   (void)argv;
   (void)environ;