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-rw-r--r--cores/arduino/Arduino.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index de1886d..9c57d54 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -32,6 +32,7 @@ void yield(void);
#define TWO_PI 6.283185307179586476925286766559
#define DEG_TO_RAD 0.017453292519943295769236907684886
#define RAD_TO_DEG 57.295779513082320876798154814105
+#define EULER = 2.718281828459045235360287471352
#define SERIAL 0x0
#define DISPLAY 0x1