diff --git a/Cargo.lock b/Cargo.lock
index ba42cdb..36f026a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1003,6 +1003,15 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
+[[package]]
+name = "cobs"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa961b519f0b462e3a3b4a34b64d119eeaca1d59af726fe450bbba07a9fc0a1"
+dependencies = [
+ "thiserror 2.0.17",
+]
+
 [[package]]
 name = "color-eyre"
 version = "0.6.5"
@@ -1344,6 +1353,18 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
+[[package]]
+name = "embedded-io"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
+
+[[package]]
+name = "embedded-io"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+
 [[package]]
 name = "encase"
 version = "0.11.2"
@@ -2324,6 +2345,18 @@ dependencies = [
  "portable-atomic",
 ]
 
+[[package]]
+name = "postcard"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6764c3b5dd454e283a30e6dfe78e9b31096d9e32036b5d1eaac7a6119ccb9a24"
+dependencies = [
+ "cobs",
+ "embedded-io 0.4.0",
+ "embedded-io 0.6.1",
+ "serde",
+]
+
 [[package]]
 name = "powerfmt"
 version = "0.2.0"
@@ -2811,6 +2844,10 @@ dependencies = [
 [[package]]
 name = "striker-proto"
 version = "0.1.0"
+dependencies = [
+ "postcard",
+ "serde",
+]
 
 [[package]]
 name = "strsim"
diff --git a/Cargo.toml b/Cargo.toml
index 4042be6..408b463 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,10 @@ edition = "2024"
 repository = "https://tangled.org/sachy.dev/striker"
 license = "MIT OR Apache-2.0"
 
+[workspace.dependencies]
+serde = { version = "1.0.210", default-features = false }
+postcard = { version = "1.1.3", default-features = false }
+
 [package]
 name = "striker"
 version = "0.1.0"
diff --git a/striker-proto/Cargo.toml b/striker-proto/Cargo.toml
index 6d8d66d..8ed27a9 100644
--- a/striker-proto/Cargo.toml
+++ b/striker-proto/Cargo.toml
@@ -7,3 +7,5 @@ repository.workspace = true
 license.workspace = true
 
 [dependencies]
+serde = { workspace = true, features = ["alloc"] }
+postcard = { workspace = true, features = ["alloc"] }
diff --git a/striker-proto/src/lib.rs b/striker-proto/src/lib.rs
index b93cf3f..f05881a 100644
--- a/striker-proto/src/lib.rs
+++ b/striker-proto/src/lib.rs
@@ -1,14 +1,38 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct StrikerRequest {
+    pub request: Request,
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum Request {
+    Ping,
+}
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum StrikerResponse {
+    Response {
+        response: Response,
+    },
+    Update(Update),
+}
 
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum Response {
+    Pong,
 }
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum Update {
+    Warning {
+        timestamp: i64,
+        level: u16,
+    },
+    Strike {
+        timestamp: i64,
+        peaks: Vec<u16>,
+        samples: Vec<i16>,
+        average: u16,
+    },
+}
+
+