Index: references
===================================================================
--- references	(revision 37261)
+++ references	(revision 37262)
@@ -1 +1,5 @@
 https://diyodemag.com/projects/air_quality_monitor_v2_an_arduino_nano-based_air_quality_monitor_datalogger_and_clock
+
+https://rsgb.org/main/blog/publications/radcom/2023/01/19/radcom-february-2023-vol-99-no-2/
+	text references and screenshot
+	lightning detector: https://github.com/erichVK5/erichVK5-lightning-detector