1 files changed, 5 insertions, 0 deletions
diff --git a/datalog.h b/datalog.h
index da715e8..57a6b9f 100644
--- a/datalog.h
+++ b/datalog.h
@@ -9,6 +9,11 @@ const int mySD_SCLK=14;
 const int mySD_MISO=2;
 const int mySD_MOSI=15;
 
+/*
+  we write fixed-length CSV lines because, at some point in the
+  future, I may need to seek "10 measurements back" or something like
+  that; also, it's easier to read
+ */
 //                      12345, 12345, 12345, 12345, 123456, 123456, 123456, 123456, 12345\n
 const char csvHeader[]=" secs,   co2,  temp, humid,    pm1,  pm2.5,    pm4,   pm10,  batt\n";
 const char csvFormat[]="% 5lu, % 5u, % 5.1f, % 5.1f, % 6.1f, % 6.1f, % 6.1f, % 6.1f, % 5.2f\n";