diff --git a/.cargo/config.toml b/.cargo/config.toml
index eca373c..640b867 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,5 +1,5 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
-runner = "elf2uf2-rs -d -s"
+runner = "elf2uf2-rs -d -s -t"
 
 [build]
 target = "thumbv6m-none-eabi"        # Cortex-M0 and Cortex-M0+
diff --git a/Cargo.lock b/Cargo.lock
index a232ae9..591ca26 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -409,6 +409,7 @@ checksum = "0ef3bac31ec146321248a169e9c7b5799f1e0b3829c7a9b324cb4600a7438f59"
 dependencies = [
  "cortex-m",
  "critical-section",
+ "defmt",
  "num-traits",
 ]
 
@@ -418,6 +419,7 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed041cc19a603d657124fddefdcbe5ef8bd60e77d972793ebb57de93394f5949"
 dependencies = [
+ "defmt",
  "document-features",
  "embassy-net-driver",
  "embassy-sync",
@@ -434,6 +436,9 @@ name = "embassy-net-driver"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "524eb3c489760508f71360112bca70f6e53173e6fe48fc5f0efd0f5ab217751d"
+dependencies = [
+ "defmt",
+]
 
 [[package]]
 name = "embassy-net-driver-channel"
@@ -457,6 +462,7 @@ dependencies = [
  "cortex-m",
  "cortex-m-rt",
  "critical-section",
+ "defmt",
  "document-features",
  "embassy-embedded-hal",
  "embassy-futures",
@@ -553,6 +559,9 @@ name = "embassy-usb-driver"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fc247028eae04174b6635104a35b1ed336aabef4654f5e87a8f32327d231970"
+dependencies = [
+ "defmt",
+]
 
 [[package]]
 name = "embassy-usb-logger"
@@ -818,6 +827,7 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
 dependencies = [
+ "defmt",
  "hash32",
  "stable_deref_trait",
 ]
@@ -1407,6 +1417,7 @@ dependencies = [
  "bitflags 1.3.2",
  "byteorder",
  "cfg-if",
+ "defmt",
  "heapless",
  "managed",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 8fd360e..f3c2bc6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,11 +4,11 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-embassy-executor = {version="*", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt"]}
-embassy-rp = {version ="*", features = ["rp2040", "time-driver", "critical-section-impl"] }
+embassy-executor = {version="*", features = ["defmt", "task-arena-size-98304", "arch-cortex-m", "executor-thread", "executor-interrupt"]}
+embassy-rp = {version ="*", features = ["defmt", "unstable-pac", "rp2040", "time-driver", "critical-section-impl"] }
 embassy-time = "*"
 embassy-usb-logger = "*"
-embassy-net = {version = "*", features = ["proto-ipv4", "tcp", "dhcpv4", "dns"]}
+embassy-net = {version = "*", features = ["defmt", "proto-ipv4", "tcp", "dhcpv4", "dns"]}
 cyw43-pio = "*"
 cyw43 = "*"
 
diff --git a/src/main.rs b/src/main.rs
index be27756..cdf78cb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,8 +2,9 @@
 #![no_main]
 #![allow(async_fn_in_trait)]
 
+use core::str::from_utf8;
 use cyw43_pio::{PioSpi, DEFAULT_CLOCK_DIVIDER};
-use defmt::*;
+use log::{info, warn};
 use embassy_executor::Spawner;
 use embassy_net::tcp::TcpSocket;
 use embassy_net::{Config, StackResources};
@@ -67,7 +68,7 @@ async fn main(spawner: Spawner) {
     static STATE: StaticCell<cyw43::State> = StaticCell::new();
     let state = STATE.init(cyw43::State::new());
     let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
-    unwrap!(spawner.spawn(cyw43_task(runner)));
+    spawner.spawn(cyw43_task(runner)).unwrap();
 
     control.init(clm).await;
     control
@@ -76,7 +77,7 @@ async fn main(spawner: Spawner) {
 
     // Use a link-local address for communication without DHCP server
     let config = Config::ipv4_static(embassy_net::StaticConfigV4 {
-        address: embassy_net::Ipv4Cidr::new(embassy_net::Ipv4Address::new(169, 254, 1, 1), 16),
+        address: embassy_net::Ipv4Cidr::new(embassy_net::Ipv4Address::new(192, 254, 0, 2), 16),
         dns_servers: heapless::Vec::new(),
         gateway: None,
     });
@@ -88,8 +89,51 @@ async fn main(spawner: Spawner) {
     static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
     let (stack, runner) = embassy_net::new(net_device, config, RESOURCES.init(StackResources::new()), seed);
 
-    unwrap!(spawner.spawn(net_task(runner)));
+    spawner.spawn(net_task(runner)).unwrap();
 
     //control.start_ap_open("cyw43", 5).await;
     control.start_ap_wpa2("cyw43", "password", 5).await;
+
+    let mut rx_buffer = [0; 4096];
+    let mut tx_buffer = [0; 4096];
+    let mut buf = [0; 4096];
+
+    loop {
+        let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
+        socket.set_timeout(Some(Duration::from_secs(10)));
+
+        control.gpio_set(0, false).await;
+        info!("Listening on TCP:1234...");
+        if let Err(e) = socket.accept(1234).await {
+            warn!("accept error: {:?}", e);
+            continue;
+        }
+
+        info!("Received connection from {:?}", socket.remote_endpoint());
+        control.gpio_set(0, true).await;
+
+        loop {
+            let n = match socket.read(&mut buf).await {
+                Ok(0) => {
+                    warn!("read EOF");
+                    break;
+                }
+                Ok(n) => n,
+                Err(e) => {
+                    warn!("read error: {:?}", e);
+                    break;
+                }
+            };
+
+            info!("rxd {}", from_utf8(&buf[..n]).unwrap());
+
+            match socket.write_all(&buf[..n]).await {
+                Ok(()) => {}
+                Err(e) => {
+                    warn!("write error: {:?}", e);
+                    break;
+                }
+            };
+        }
+    }
 }