README: fix submodule initialization

RIOT-OS · Sep 20, 2022 · e0e2e40 · e0e2e40
1 parent 5955c6f
commit e0e2e40
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -25,7 +25,15 @@ cd applications
 RIOTBASE="../RIOT" BOARD=samr21-xpro make -C sniffer flash
 ```
 
-Alternatively, you can step into the submodule and check out the current master:
+Alternatively you can use RIOT as a submodule. To initialize the submodule, from the
+root of the repository run:
+
+```sh
+git submodule update --init --recursive
+```
+
+If you want to use master then simply step into the submodule and checkout master or
+any other desired branch.
 
 ```sh
 cd RIOT