diff --git a/collector/poll.py b/collector/poll.py
new file mode 100644
index 0000000..183ccbd
--- /dev/null
+++ b/collector/poll.py
@@ -0,0 +1,3 @@
+#!/usr/bin/env python3
+# Poll holding registers and ship them to the metrics endpoint.
+REGISTERS = range(40001, 40033)