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-rw-r--r--fun/idual/README.md23
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diff --git a/fun/idual/README.md b/fun/idual/README.md
index b0ece099c34d..922047617f25 100644
--- a/fun/idual/README.md
+++ b/fun/idual/README.md
@@ -9,3 +9,26 @@ The supported colour codes of the iDual remote are stored in
 
 The point of this is to make it possible for me to automate my lights
 in the morning, so that I can actually get out of bed.
+
+## Capturing codes
+
+Capturing codes is relatively easy, assuming that the broadlink device
+is set up:
+
+```python
+import broadlink
+import base64
+
+devices = broadlink.discover(timeout=5)
+devices[0].auth()
+```
+
+For each code, the procedure is as follows:
+
+```python
+devices[0].find_rf_packet()
+# wait until this returns True
+
+devices[0].check_data()
+# this will return the code
+```