try nodelay on loop

platformio.ini

@@ -13,7 +13,7 @@ platform = https://github.com/maxgerhardt/platform-raspberrypi.git
 board = pico
 framework = arduino
 platform_packages = 
-	framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#c64a4a58d793ee6d24c7df7ff3ec35adac3bbb45
+	framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#lw
 board_build.core = earlephilhower
 upload_port = /run/media/amelia/RPI-RP2/
 debug_tool = cmsis-dap

src/main.cpp

@@ -133,7 +133,7 @@ void loop() {
     // as all local functions count from 0
     //delay(0);
     Serial.println("Got valid packet of size " + String(size) + " at " + String(millis()/1000.0));
-    delayMicroseconds(5000);
+    //delayMicroseconds(1000);
     nopackets = 0;
   }
   else {