4 files changed, 79 insertions, 1 deletions
diff --git a/fw/CMakeLists.txt b/fw/CMakeLists.txt
index cffb6a1..b7a3783 100644
--- a/fw/CMakeLists.txt
+++ b/fw/CMakeLists.txt
@@ -23,6 +23,7 @@ target_sources(app
 		"${CMAKE_CURRENT_SOURCE_DIR}/src/syslog.c"
 		"${CMAKE_CURRENT_SOURCE_DIR}/src/mac.c"
 		"${CMAKE_CURRENT_SOURCE_DIR}/src/http.c"
+		"${CMAKE_CURRENT_SOURCE_DIR}/src/heart.c"
 )
 
 zephyr_linker_sources(SECTIONS sections-rom.ld)
diff --git a/fw/prj.conf b/fw/prj.conf
index bd761fc..7984caa 100644
--- a/fw/prj.conf
+++ b/fw/prj.conf
@@ -20,10 +20,15 @@ CONFIG_LOG_MODE_DEFERRED=y
 
 CONFIG_POSIX_C_LANG_SUPPORT_R=y
 
-CONFIG_HTTP_SERVER=y
 CONFIG_HTTP_PARSER=y
 CONFIG_HTTP_PARSER_URL=y
 
+CONFIG_HTTP_SERVER=y
+
 CONFIG_FILE_SYSTEM=y
 
 CONFIG_EVENTFD=y
+
+CONFIG_ZBUS=y
+CONFIG_ZBUS_MSG_SUBSCRIBER=y
+CONFIG_HEAP_MEM_POOL_SIZE=2048
diff --git a/fw/src/heart.c b/fw/src/heart.c
new file mode 100644
index 0000000..6bcced6
--- /dev/null
+++ b/fw/src/heart.c
@@ -0,0 +1,52 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+
+#include <stdbool.h>
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+
+#include "heart.h"
+
+
+LOG_MODULE_REGISTER(heart);
+
+
+#define HEART_PERIOD          K_MSEC(1000)
+#define HEART_STACK_SIZE               500
+#define HEART_PRIO       K_PRIO_PREEMPT(8)
+
+
+ZBUS_CHAN_DEFINE(
+	heartbeat_channel,
+	struct heartbeat,
+	NULL,
+	NULL,
+	ZBUS_OBSERVERS_EMPTY,
+	ZBUS_MSG_INIT(.ttl_ms = 0)
+);
+
+
+static void heart_thread_function(void *ptr1, void *ptr2, void *ptr3) {
+	LOG_INF("Starting to beat");
+
+	struct heartbeat heartbeat = {.ttl_ms = 1100};
+
+	while (true) {
+		LOG_DBG("Heart beat");
+		int ret = zbus_chan_pub(&heartbeat_channel, &heartbeat, K_FOREVER);
+		if (ret < 0) {
+			LOG_ERR("Could not publish heartbeat");
+		}
+		k_sleep(HEART_PERIOD);
+	}
+}
+
+
+K_THREAD_DEFINE(heart_thread, HEART_STACK_SIZE,
+                heart_thread_function, NULL, NULL, NULL,
+                HEART_PRIO, 0, 0);
diff --git a/fw/src/heart.h b/fw/src/heart.h
new file mode 100644
index 0000000..cd32c15
--- /dev/null
+++ b/fw/src/heart.h
@@ -0,0 +1,20 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef SRC_HEART_H
+#define SRC_HEART_H
+
+
+#include <zephyr/zbus/zbus.h>
+
+
+struct heartbeat {
+	uint32_t ttl_ms;
+};
+
+ZBUS_CHAN_DECLARE(heartbeat_channel);
+
+#endif // !SRC_HEART_H