diff --git a/README.md b/README.md
index 1401c0c..5c76dad 100644
--- a/README.md
+++ b/README.md
@@ -118,15 +118,25 @@ sudo adduser debian plugdev
 sudo adduser debian video
 ```
 
-## ZWO ASI183MC Pro.
+## ASI ZWO ASI183MC Pro.
+
+Download SDK from ASI. It is under a permissive license,
+for the binaries, but where is the source?
+It appears it is proprietary software. There are libre
+implementations, such as for INDI.
+
+
+* https://astronomy-imaging-camera.com/software-drivers
 
-Set up udev:
 ```
-echo 'SUBSYSTEM=="usb", ATTRS{idVendor}=="03c3", ATTRS{idProduct}=="183f", \
-  MODE="0660", GROUP="plugdev"' | \
-  sudo tee /etc/udev/rules.d/50-zwo.rules
+tar xf ASI_linux_mac_SDK_V1.26.tar.bz2
+cd ASI_linux_mac_SDK_V1.26/
+
+# Set up permissions with udev:
+cat lib/asi.rules | sudo tee /etc/udev/rules.d/50-asi.rules
 ```
 
+
 ## Web Cam
 Perhaps like this using a web cam and OpenCV