diff --git a/README.md b/README.md index 0639f5e..e4a472a 100644 --- a/README.md +++ b/README.md @@ -14,6 +14,10 @@ https://revspace.nl/MHZ19 ## Implementation +``` +C ppm = 5000 * (T_high - 2 ms) / (T_high + T_low - 4ms) +``` + The implementation is mostly based on https://forum.arduino.cc/index.php?topic=525459.msg3587557#msg3587557