diff --git a/cmd/load/main.go b/cmd/load/main.go
index 759cda7..84765da 100644
--- a/cmd/load/main.go
+++ b/cmd/load/main.go
@@ -82,6 +82,9 @@ func run(buildDir string) error {
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "warning: Info request failed: %v\n", err)
 		} else {
+			fmt.Printf("Board ID: %02X%02X%02X%02X%02X%02X%02X%02X\n",
+				info.BoardID[0], info.BoardID[1], info.BoardID[2], info.BoardID[3],
+				info.BoardID[4], info.BoardID[5], info.BoardID[6], info.BoardID[7])
 			fmt.Printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
 				info.MAC[0], info.MAC[1], info.MAC[2],
 				info.MAC[3], info.MAC[4], info.MAC[5])
diff --git a/include/protocol.h b/include/protocol.h
index 961ac35..3611a26 100644
--- a/include/protocol.h
+++ b/include/protocol.h
@@ -5,10 +5,21 @@
 #include <tuple>
 #include <vector>
 
-struct ResponsePICOBOOT {
+struct Envelope {
+    static constexpr int8_t ext_id = 0;
+    uint32_t message_id;
+    uint32_t checksum;
+    std::vector<uint8_t> payload;
+    auto as_tuple() const { return std::tie(message_id, checksum, payload); }
+    auto as_tuple() { return std::tie(message_id, checksum, payload); }
+};
+
+struct DeviceError {
     static constexpr int8_t ext_id = 1;
-    auto as_tuple() const { return std::tie(); }
-    auto as_tuple() { return std::tie(); }
+    uint32_t code;
+    std::string message;
+    auto as_tuple() const { return std::tie(code, message); }
+    auto as_tuple() { return std::tie(code, message); }
 };
 
 struct RequestPICOBOOT {
@@ -17,6 +28,12 @@ struct RequestPICOBOOT {
     auto as_tuple() { return std::tie(); }
 };
 
+struct ResponsePICOBOOT {
+    static constexpr int8_t ext_id = 3;
+    auto as_tuple() const { return std::tie(); }
+    auto as_tuple() { return std::tie(); }
+};
+
 struct RequestInfo {
     static constexpr int8_t ext_id = 4;
     auto as_tuple() const { return std::tie(); }
@@ -25,24 +42,8 @@ struct RequestInfo {
 
 struct ResponseInfo {
     static constexpr int8_t ext_id = 5;
+    std::array<uint8_t, 8> board_id;
     std::array<uint8_t, 6> mac;
-    auto as_tuple() const { return std::tie(mac); }
-    auto as_tuple() { return std::tie(mac); }
-};
-
-struct DeviceError {
-    static constexpr int8_t ext_id = 3;
-    uint32_t code;
-    std::string message;
-    auto as_tuple() const { return std::tie(code, message); }
-    auto as_tuple() { return std::tie(code, message); }
-};
-
-struct Envelope {
-    static constexpr int8_t ext_id = 0;
-    uint32_t message_id;
-    uint32_t checksum;
-    std::vector<uint8_t> payload;
-    auto as_tuple() const { return std::tie(message_id, checksum, payload); }
-    auto as_tuple() { return std::tie(message_id, checksum, payload); }
+    auto as_tuple() const { return std::tie(board_id, mac); }
+    auto as_tuple() { return std::tie(board_id, mac); }
 };
diff --git a/lib/client/types.go b/lib/client/types.go
index c3cb7fe..dd790b7 100644
--- a/lib/client/types.go
+++ b/lib/client/types.go
@@ -2,12 +2,13 @@ package client
 
 import "github.com/theater/picomap/lib/msgpack"
 
-type ResponsePICOBOOT struct{}
 type RequestPICOBOOT struct{}
+type ResponsePICOBOOT struct{}
 
 type RequestInfo struct{}
 type ResponseInfo struct {
-	MAC [6]byte
+	BoardID [8]byte
+	MAC     [6]byte
 }
 
 type DeviceError struct {
@@ -27,9 +28,9 @@ type Envelope struct {
 
 func init() {
 	msgpack.RegisterExt(0, (*Envelope)(nil))
-	msgpack.RegisterExt(1, (*ResponsePICOBOOT)(nil))
+	msgpack.RegisterExt(1, (*DeviceError)(nil))
 	msgpack.RegisterExt(2, (*RequestPICOBOOT)(nil))
-	msgpack.RegisterExt(3, (*DeviceError)(nil))
+	msgpack.RegisterExt(3, (*ResponsePICOBOOT)(nil))
 	msgpack.RegisterExt(4, (*RequestInfo)(nil))
 	msgpack.RegisterExt(5, (*ResponseInfo)(nil))
 }
diff --git a/picomap.cpp b/picomap.cpp
index 979262f..5068f08 100644
--- a/picomap.cpp
+++ b/picomap.cpp
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include "pico/stdlib.h"
 #include "pico/bootrom.h"
+#include "pico/unique_id.h"
 #include "device.h"
 
 extern "C" {
@@ -25,6 +26,7 @@ static bool w6300_init() {
 
 int main() {
     stdio_init_all();
+    stdio_set_translate_crlf(&stdio_usb, false);
 
     if (!w6300_init()) {
         printf("W6300 init failed\n");
@@ -54,6 +56,9 @@ int main() {
             break;
         case RequestInfo::ext_id: {
             ResponseInfo info;
+            pico_unique_board_id_t uid;
+            pico_get_unique_board_id(&uid);
+            std::copy(uid.id, uid.id + 8, info.board_id.begin());
             getSHAR(info.mac.data());
             send_bytes(encode_response(msg->message_id, info));
             break;