renamed and led test

README.md

@@ -33,4 +33,27 @@ apt install build-essential raspberrypi-kernel-headers git
 ```
 
 
+## Test LEDs:
 
+
+GPIO26 is red, GPIO21 is blue:
+
+Blue on:
+```
+pinctrl set 21 op dh
+```
+
+Blue off:
+```
+pinctrl set 21 op dl
+```
+
+Red on:
+```
+pinctrl set 26 op dh
+```
+
+Red off:
+```
+pinctrl set 26 op dl
+```