How to add multiple elements in a server node?

Question

I am experimenting with the mesh light-switch example. I want to control two LEDs on a single node using the SimpleOnOff model. I know I should add a separate element and add the second SimpleOnOff model in it, but how do I do it? Is there any sample code which you can point me to?

Prasad · Accepted Answer

Finally I was able to get it working... Here are the changes! 
 diff --git a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/provisioner/src/node_setup.c b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/provisioner/src/node_setup.c
index d9a6576..7ed5c85 100644
--- a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/provisioner/src/node_setup.c
+++ b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/provisioner/src/node_setup.c
@@ -144,6 +144,7 @@ static const config_steps_t server1_server2_config_steps[] =
 NODE_SETUP_CONFIG_APPKEY_ADD,
 NODE_SETUP_CONFIG_APPKEY_BIND_HEALTH,
 NODE_SETUP_CONFIG_APPKEY_BIND_ONOFF_SERVER,
+ NODE_SETUP_CONFIG_APPKEY_BIND_ONOFF_SERVER,
 NODE_SETUP_CONFIG_PUBLICATION_HEALTH,
 NODE_SETUP_CONFIG_PUBLICATION_ONOFF_SERVER1_2,
 NODE_SETUP_CONFIG_SUBSCRIPTION_ONOFF_SERVER,
@@ -340,6 +341,7 @@ static void config_step_execute(void)
 {
 uint32_t status;
 static uint16_t model_element_addr = 0;
+ static bool next_element = false;
 
 /* This example configures the provisioned nodes in the following way
 * Node 0: Client node (Switch)
@@ -394,16 +396,34 @@ static void config_step_execute(void)
 /* Bind the On/Off server to the application key: */
 case NODE_SETUP_CONFIG_APPKEY_BIND_ONOFF_SERVER:
 {
- __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "App key bind: Simple On/Off server
");
- access_model_id_t model_id;
- model_id.company_id = ACCESS_COMPANY_ID_NORDIC;
- model_id.model_id = SIMPLE_ON_OFF_SERVER_MODEL_ID;
- uint16_t element_address = m_current_node_addr;
- retry_on_fail(config_client_model_app_bind(element_address, m_appkey_idx, model_id));
-
- static const uint8_t exp_status[] = {ACCESS_STATUS_SUCCESS};
- expected_status_set(CONFIG_OPCODE_MODEL_APP_STATUS, sizeof(exp_status), exp_status);
- break;
+ if (!next_element)
+ {
+ __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "Configure first element
");
+ access_model_id_t model_id;
+ model_id.company_id = ACCESS_COMPANY_ID_NORDIC;
+ model_id.model_id = SIMPLE_ON_OFF_SERVER_MODEL_ID;
+ uint16_t element_address = m_current_node_addr;
+ retry_on_fail(config_client_model_app_bind(element_address, m_appkey_idx, model_id));
+
+ static const uint8_t exp_status[] = {ACCESS_STATUS_SUCCESS};
+ expected_status_set(CONFIG_OPCODE_MODEL_APP_STATUS, sizeof(exp_status), exp_status);
+ next_element = true;
+ break;
+ }
+ else
+ {
+ __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "Configure next element
");
+ access_model_id_t model_id;
+ model_id.company_id = ACCESS_COMPANY_ID_NORDIC;
+ model_id.model_id = SIMPLE_ON_OFF_SERVER_MODEL_ID;
+ uint16_t element_address = m_current_node_addr + 1;
+ retry_on_fail(config_client_model_app_bind(element_address, m_appkey_idx, model_id));
+
+ static const uint8_t exp_status[] = {ACCESS_STATUS_SUCCESS};
+ expected_status_set(CONFIG_OPCODE_MODEL_APP_STATUS, sizeof(exp_status), exp_status);
+ next_element = false;
+ break;
+ }
 }
 
 /* Bind the On/Off client to the application key: */
diff --git a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/include/nrf_mesh_config_app.h b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/include/nrf_mesh_config_app.h
index 9d70cc1..312ba5f 100644
--- a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/include/nrf_mesh_config_app.h
+++ b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/include/nrf_mesh_config_app.h
@@ -82,7 +82,7 @@
 * @note This value has to be greater than two to fit the configuration and health models,
 * plus the number of models needed by the application.
 */
-#define ACCESS_MODEL_COUNT (3)
+#define ACCESS_MODEL_COUNT (4)
 
 /**
 * The number of elements in the application.
@@ -90,7 +90,7 @@
 * @warning If the application is to support multiple _instances_ of the _same_ model, they cannot
 * belong in the same element and a separate element is needed for the new instance.
 */
-#define ACCESS_ELEMENT_COUNT (1)
+#define ACCESS_ELEMENT_COUNT (2)
 
 /**
 * The number of allocated subscription lists for the application.
diff --git a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/src/main.c b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/src/main.c
index 1048083..1367e26 100644
--- a/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/src/main.c
+++ b/Tools/nrf5_SDK_for_Mesh_v2.0.1_src/examples/light_switch/server/src/main.c
@@ -57,12 +57,17 @@
 #define RTT_INPUT_POLL_PERIOD_MS (100)
 #define LED_PIN_NUMBER (BSP_LED_0)
 #define LED_PIN_MASK (1u << LED_PIN_NUMBER)
+#define LED_PIN_NUMBER_1 (BSP_LED_1)
+#define LED_PIN_MASK_1 (1u << LED_PIN_NUMBER_1)
+
 #define LED_BLINK_INTERVAL_MS (200)
 #define LED_BLINK_CNT_START (2)
 #define LED_BLINK_CNT_RESET (3)
 #define LED_BLINK_CNT_PROV (4)
 
 static simple_on_off_server_t m_server;
+static simple_on_off_server_t m_server1;
+
 static bool m_device_provisioned;
 
 static void provisioning_complete_cb(void)
@@ -89,6 +94,21 @@ static bool on_off_server_set_cb(const simple_on_off_server_t * p_server, bool v
 return value;
 }
 
+
+static bool on_off_server_get_cb_1(const simple_on_off_server_t * p_server)
+{
+ return hal_led_pin_get(LED_PIN_NUMBER_1);
+}
+
+static bool on_off_server_set_cb_1(const simple_on_off_server_t * p_server, bool value)
+{
+ __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "Got SET command to %u
", value);
+ hal_led_pin_set(LED_PIN_NUMBER_1, value);
+ return value;
+}
+
+
+
 static void node_reset(void)
 {
 __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- Node reset -----
");
@@ -122,6 +142,16 @@ static void button_event_handler(uint32_t button_number)
 break;
 }
 
+ case 1:
+ {
+ uint8_t value = !hal_led_pin_get(LED_PIN_NUMBER_1);
+ __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "User action 
");
+ hal_led_pin_set(LED_PIN_NUMBER_1, value);
+ (void)simple_on_off_server_status_publish(&m_server1, value);
+ break;
+ }
+
+
 /* Initiate node reset */
 case 3:
 {
@@ -151,7 +181,10 @@ static void models_init_cb(void)
 m_server.get_cb = on_off_server_get_cb;
 m_server.set_cb = on_off_server_set_cb;
 ERROR_CHECK(simple_on_off_server_init(&m_server, 0));
- ERROR_CHECK(access_model_subscription_list_alloc(m_server.model_handle));
+
+ m_server1.get_cb = on_off_server_get_cb_1;
+ m_server1.set_cb = on_off_server_set_cb_1;
+ ERROR_CHECK(simple_on_off_server_init(&m_server1, 1));
 }
 
 static void mesh_init(void)
 
 Note that these changes are just to demonstrate the regions of code that you need to change for adding multiple elements. I just checked this with only 1 server board. The light switch client application already has multiple nodes in it(for 4 switches), I found it very helpful.

How to add multiple elements in a server node?

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