samples: mgmt: hawkbit: add custom attributes

Extend sample for the custom attributes

Signed-off-by: Fin Maaß <[email protected]>

samples/subsys/mgmt/hawkbit/prj.conf

@@ -58,3 +58,6 @@ CONFIG_LOG_BUFFER_SIZE=4096
 
 #Generate HEX output
 CONFIG_BUILD_OUTPUT_HEX=y
+
+#Use custom attributes for hawkBit
+CONFIG_HAWKBIT_CUSTOM_ATTRIBUTES=y

samples/subsys/mgmt/hawkbit/src/main.c

@@ -10,6 +10,7 @@
 #include <zephyr/sys/printk.h>
 #include <zephyr/sys/reboot.h>
 #include <zephyr/logging/log.h>
+#include <zephyr/data/json.h>
 
 #include "dhcp.h"
 
@@ -20,6 +21,40 @@
 
 LOG_MODULE_REGISTER(main);
 
+#ifdef CONFIG_HAWKBIT_CUSTOM_ATTRIBUTES
+struct hawkbit_cfg_data {
+	const char *VIN;
+	const char *customAttr;
+};
+
+struct hawkbit_cfg {
+	const char *mode;
+	struct hawkbit_cfg_data data;
+};
+
+static const struct json_obj_descr json_cfg_data_descr[] = {
+	JSON_OBJ_DESCR_PRIM(struct hawkbit_cfg_data, VIN, JSON_TOK_STRING),
+	JSON_OBJ_DESCR_PRIM(struct hawkbit_cfg_data, customAttr, JSON_TOK_STRING),
+};
+
+static const struct json_obj_descr json_cfg_descr[] = {
+	JSON_OBJ_DESCR_PRIM(struct hawkbit_cfg, mode, JSON_TOK_STRING),
+	JSON_OBJ_DESCR_OBJECT(struct hawkbit_cfg, data, json_cfg_data_descr),
+};
+
+int hawkbit_new_config_data_cb(const char *device_id, uint8_t *buffer, const size_t buffer_size)
+{
+	struct hawkbit_cfg cfg = {
+		.mode = "merge",
+		.data.VIN = device_id,
+		.data.customAttr = "Hello World!",
+	};
+
+	return json_obj_encode_buf(json_cfg_descr, ARRAY_SIZE(json_cfg_descr), &cfg, buffer,
+				   buffer_size);
+}
+#endif /* CONFIG_HAWKBIT_CUSTOM_ATTRIBUTES */
+
 int main(void)
 {
 	int ret = -1;
@@ -33,6 +68,12 @@ int main(void)
 	tls_credential_add(CA_CERTIFICATE_TAG, TLS_CREDENTIAL_CA_CERTIFICATE,
 			   ca_certificate, sizeof(ca_certificate));
 #endif
+#ifdef CONFIG_HAWKBIT_CUSTOM_ATTRIBUTES
+	ret = hawkbit_set_custom_data_cb(hawkbit_new_config_data_cb);
+	if (ret < 0) {
+		LOG_ERR("Failed to set custom data callback");
+	}
+#endif /* CONFIG_HAWKBIT_CUSTOM_ATTRIBUTES */
 
 	ret = hawkbit_init();