diff --git a/Arduino/pi.ino b/Arduino/pi.ino
index 16313da6b7f166f4e1276c8b02281d8ea2bda25b..4da37a2c93f5b4c550cb9d117e1605627a17a4b2 100644
--- a/Arduino/pi.ino
+++ b/Arduino/pi.ino
@@ -8,7 +8,7 @@
 #define NPTS 1000000
 
 int i;
-double a,b,c,pi,dt,mflops;
+float a,b,c,pi,dt,mflops;
 unsigned long tstart,tend;
 
 void setup() {
diff --git a/README.md b/README.md
index 52633f3f7a91306def83e2e211719ce9c7bd55a3..08eadaf857a8bf134aa5870c1fb9384ba3ac6460 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@
 |0.47|[numpi.py](Python/numpi.py)|Python, NumPy|Intel i7-8700T|November, 2018|
 |0.074|[pi.c](C/pi.c)|C<br>gcc pi.c -o pi -lm -O3 -ffast-math|Raspberry Pi Zero|December, 2020|
 |0.029|[pi.py](Python/pi.py)|Python|Intel i7-8700T|November, 2018|
-|0.001|[pi.ino](Arduino/pi.ino)|Arduino|ESP32-WROOM|December, 2020|
+|0.006|[pi.ino](Arduino/pi.ino)|Arduino,float|ESP32-WROOM|December, 2020|
 
 |estimated GFlops|estimated GFlops/W|code|description|system|date|
 |---|---|---|---|---|---|