diff --git a/test/test.ino b/test/test.ino
index 705d181..164cca5 100644
--- a/test/test.ino
+++ b/test/test.ino
@@ -1,6 +1,6 @@
 float v = 0;
 float a = 0;
-float w = 0;
+char buf[50];
 
 void setup() {
   Serial.begin(115200);
@@ -9,12 +9,8 @@ void setup() {
 void loop() {
   v = random(0, 5600) / 100.0;
   a = random(0, 5000) / 100.0;
-  w = v * a;
-  Serial.print("v = ");
-  Serial.println(v);
-  Serial.print("a = ");
-  Serial.println(a);
-  Serial.print("w = ");
-  Serial.println(w);
+  Serial.print(v, 2);
+  Serial.print(",");
+  Serial.println(a, 2);
   delay(500);
 }