--- a/MIGRATION	Wed Mar 27 18:59:39 2024 +0100
+++ b/MIGRATION	Tue Apr 02 15:03:12 2024 +0200
@@ -41,3 +41,20 @@
 
 Add pigpio library and make it testable by the configure script.
 
+
+	Flow one-wire.
+	--------------
+
+States:
+  1. Init state.
+  2. Check for exit.
+     Scan for devices. Add to one-wire list.
+  3. Check for exit.
+     Read all DS2413 devices programmed as input.
+  4. Check for exit.
+     Read one temperture sensor from list and update device.
+  5. Check for exit.
+     Check for missing devices not in one wire table.
+     Goto 2.
+  6. Exit state.
+