diff --git a/nmcli-with-gsm.md b/nmcli-with-gsm.md
index b265be5..42bfd19 100644
--- a/nmcli-with-gsm.md
+++ b/nmcli-with-gsm.md
@@ -166,3 +166,27 @@ mmcli -m 0 --start -o 0
 mmcli -m 0 --accept -o 1
 ```
 
+# Powon 4G ext
+echo "pulling up gpio 34"
+sudo gpio mode 34 out
+sudo gpio write 34 1
+
+echo "pulling up 33 to reset "
+sudo gpio mode 33 out
+sudo gpio write 33 1
+
+sleep 5
+sudo gpio write 33 0
+echo "pulling back 33"
+
+## cm4 version
+
+sudo gpio mode 24 out
+sudo gpio write 24 1
+
+sudo gpio mode 15 out
+sudo gpio write 15 1
+
+sleep 5
+sudo gpio write 15 0
+