diff --git a/arduino.wa b/arduino.wa
index 4e42b07cd825cb7501a6739735454ecf925bb8bd..04aa687df8ef12a39d92fc248a86d963ae77c2de 100644
--- a/arduino.wa
+++ b/arduino.wa
@@ -5,7 +5,7 @@ import "syscall/arduino"
 var LED = arduino.GetPinLED()
 
 fn init() {
-	arduino.PinMode(LED, 1)
+	arduino.PinMode(LED, arduino.OUTPUT)
 	arduino.Println("Wa/Arduino is running 😎")
 }
 
diff --git a/internal/app/waruntime/arduino.go b/internal/app/waruntime/arduino.go
index 9c10d3f418fbd4c6b505bbf86a04477fcb810a9c..8d3dedac4c9b47a2afa806ce730f4f0f1bdd0963 100644
--- a/internal/app/waruntime/arduino.go
+++ b/internal/app/waruntime/arduino.go
@@ -32,17 +32,24 @@ func ArduinoInstantiate(ctx context.Context, rt wazero.Runtime) (api.Closer, err
 		Export("delay").
 		NewFunctionBuilder().
 		WithFunc(func(ctx context.Context, pin, mode int32) {
-			if mode == 0 {
-				fmt.Printf("arduino.pinMode(%d, %s)\n", pin, "LOW")
-			} else {
-				fmt.Printf("arduino.pinMode(%d, %s)\n", pin, "HIGH")
+			switch mode {
+			case 0:
+				fmt.Printf("arduino.pinMode(%d, %s)\n", pin, "INPUT")
+			case 1:
+				fmt.Printf("arduino.pinMode(%d, %s)\n", pin, "OUTPUT")
+			default:
+				fmt.Printf("arduino.pinMode(%d, %s)\n", pin, "INPUT_PULLUP")
 			}
 		}).
 		WithParameterNames("pin", "mode").
 		Export("pinMode").
 		NewFunctionBuilder().
 		WithFunc(func(ctx context.Context, pin, value int32) {
-			fmt.Printf("arduino.digitalWrite(%d, %d)\n", pin, value)
+			if value == 0 {
+				fmt.Printf("arduino.digitalWrite(%d, %s)\n", pin, "LOW")
+			} else {
+				fmt.Printf("arduino.digitalWrite(%d, %s)\n", pin, "HIGH")
+			}
 		}).
 		WithParameterNames("pin", "value").
 		Export("digitalWrite").