Add example.

examples/mesh/basic_on_off_level_server/main/main.cpp

@@ -0,0 +1,66 @@
+#include "NimBLEDevice.h"
+#include "driver/gpio.h"
+
+extern "C" {void app_main(void);}
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+
+// LED pins
+#define LEDR GPIO_NUM_16
+#define LEDG GPIO_NUM_17
+#define LEDB GPIO_NUM_18
+#define OUTPUT_PIN (1ULL<<LEDG)
+
+static uint8_t onOffVal = 0; 
+static int16_t levelVal = 0; 
+
+class onOffSrvModelCallbacks : public NimBLEMeshModelCallbacks {
+    void setOnOff(uint8_t val) {
+        printf("on/off set val %d\n", val);
+        onOffVal = val;
+        gpio_set_level(LEDG, !onOffVal);
+    }
+
+    uint8_t getOnOff() {
+        printf("on/off get val %d", onOffVal);
+        return onOffVal;
+    }
+};
+
+class levelSrvModelCallbacks : public NimBLEMeshModelCallbacks {
+    void setLevel(int16_t val) {
+        printf("Level set val %d\n", val);
+        levelVal = val;
+    }
+
+    void setDelta(int16_t val) {
+        printf("Level set delta %d\n", val);
+        levelVal += val;
+    }
+
+    int16_t getLevel() {
+        printf("Level get val %d\n", levelVal);
+        return levelVal;
+    }
+};
+
+
+void app_main(void) {
+    gpio_config_t io_conf;
+    io_conf.intr_type = (gpio_int_type_t)GPIO_PIN_INTR_DISABLE;
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    io_conf.pin_bit_mask = OUTPUT_PIN;
+    io_conf.pull_down_en = (gpio_pulldown_t)0;
+    io_conf.pull_up_en = (gpio_pullup_t)0;
+    gpio_config(&io_conf);
+    
+    gpio_set_level(LEDG, 1);
+  
+    NimBLEDevice::init("");
+    NimBLEMeshNode *pMesh = NimBLEDevice::createMeshNode(NimBLEUUID(SERVICE_UUID),0);
+    NimBLEMeshElement* pElem = pMesh->getElement();
+    pElem->createModel(BT_MESH_MODEL_ID_GEN_ONOFF_SRV, new onOffSrvModelCallbacks());
+    //pElem = pMesh->createElement();
+    pElem->createModel(BT_MESH_MODEL_ID_GEN_LEVEL_SRV, new levelSrvModelCallbacks());
+    pMesh->start();
+}