diff --git a/script/cpu-usage.py b/script/cpu-net-monitor.py
similarity index 71%
rename from script/cpu-usage.py
rename to script/cpu-net-monitor.py
index c3e1cba..a507889 100755
--- a/script/cpu-usage.py
+++ b/script/cpu-net-monitor.py
@@ -13,9 +13,14 @@ def cpu_load_serial_driver(device:str, retry_interval:float=5.0):
 			avg_usage_to_serial(port)
 		except serial.SerialException as e:
 			print(f"[!] Could not connect to device: {str(e)}", file=sys.stderr)
+		else:
+			port.close()
 		sleep(retry_interval)
 
 def avg_usage_to_serial(port:serial.Serial):
+	net = psutil.net_io_counters()
+	net_tx = net.bytes_sent
+	net_rx = net.bytes_recv
 	port.write(struct.pack("BB", 0, 0))
 	port.flush()
 	while True:
@@ -27,6 +32,15 @@ def avg_usage_to_serial(port:serial.Serial):
 		except serial.SerialException as e:
 			print(f"[!] Failed writing payload to device: {str(e)}", file=sys.stderr)
 			break
+		net = psutil.net_io_counters()
+		try:
+			port.write(struct.pack("BBBB", 2, 2, int(net.bytes_sent > net_tx), int(net.bytes_recv > net_rx)))
+			port.flush()
+		except serial.SerialException as e:
+			print(f"[!] Failed writing payload to device: {str(e)}", file=sys.stderr)
+			break
+		net_rx = net.bytes_recv
+		net_tx = net.bytes_sent
 
 
 if __name__ == "__main__":
diff --git a/src/main.rs b/src/main.rs
index 632b49a..4d74a23 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,6 +23,8 @@ fn main() -> ! {
 	let timer2 = Timer2Pwm::new(dp.TC2, Prescaler::Direct);
 	let pins = arduino_hal::pins!(dp);
 	let mut led_load = pins.d6.into_output();
+	let mut led_rx = pins.d5.into_output(); // green
+	let mut led_tx = pins.d4.into_output(); // red
 	let button = pins.d2.into_pull_up_input();
 	let mut cpu_leds = FourLedDisplay::new(
 		pins.d3.into_output().into_pwm(&timer2),
@@ -36,6 +38,8 @@ fn main() -> ! {
 	let mut serial = arduino_hal::default_serial!(dp, pins, 57600);
 
 	led_load.set_high();
+	led_rx.set_high();
+	led_tx.set_high();
 	
 	// prepare display
 	let mut display: GraphicsMode<_> = Builder::new().with_size(sh1106::prelude::DisplaySize::Display128x64).connect_i2c(i2c).into();
@@ -58,6 +62,8 @@ fn main() -> ! {
 	cpu_leds.set(4, 255);
 
 	led_load.set_low();
+	led_tx.set_low();
+	led_rx.set_low();
 
 	let mut pkt_builder = PacketBuilder::new();
 
@@ -83,6 +89,12 @@ fn main() -> ! {
 								cpu_leds.set_many(payload[0], payload[1], payload[2], payload[3]);
 							}
 						},
+						PacketId::NetStatePacket => {
+							if let Some(payload) = pkt.payload && payload.len() == 2 {
+								if payload[0] == 0 { led_tx.set_low() } else { led_tx.set_high() };
+								if payload[1] == 0 { led_rx.set_low() } else { led_rx.set_high() };
+							}
+						},
 						_ => {}, // TODO log it?
 					}
 				}
diff --git a/src/packet.rs b/src/packet.rs
index 1f9a5ae..5e85e3d 100644
--- a/src/packet.rs
+++ b/src/packet.rs
@@ -5,6 +5,7 @@ pub enum PacketId {
 	Invalid = 0xFF,
 	Reset = 0x00,
 	SetLedsPacket = 0x01,
+	NetStatePacket = 0x02,
 }
 
 impl From<u8> for PacketId {
@@ -12,6 +13,7 @@ impl From<u8> for PacketId {
 		match x {
 			0 => PacketId::Reset,
 			1 => PacketId::SetLedsPacket,
+			2 => PacketId::NetStatePacket,
 			_ => PacketId::Invalid,
 		}
 	}
@@ -53,7 +55,7 @@ impl PacketBuilder {
 			PacketBuilderStep::ID => {
 				let id = PacketId::from(byte);
 				match id {
-					PacketId::SetLedsPacket | PacketId::Reset => {
+					PacketId::SetLedsPacket | PacketId::Reset | PacketId::NetStatePacket => {
 						self.id = id;
 						self.step = PacketBuilderStep::SIZE;
 					},