feat(zigbee): Add stop/start methods

Author: P-R-O-C-H-Y

docs/en/zigbee/zigbee_core.rst

@@ -51,6 +51,24 @@ This function will return ``true`` if initialization successful, ``false`` other
         * Zigbee mode to ``Zigbee ED (end device)``.
         * Partition scheme to ``Zigbee xMB with spiffs`` (where ``x`` is the number of MB of selected flash size).
 
+start
+^^^^^
+Starts the Zigbee stack again, if it was stopped by calling ``stop()``.
+
+.. code-block:: arduino
+
+    void start();
+
+
+stop
+^^^^
+Stops the Zigbee stack. This can be used after calling ``begin()`` to stop the Zigbee stack.
+Usage example is to save power or when you need the radio to be available for other tasks.
+
+.. code-block:: arduino
+
+    void stop();
+
 Network Status
 **************
 

libraries/Zigbee/src/ZigbeeCore.cpp

@@ -765,6 +765,24 @@ void ZigbeeCore::setNVRAMChannelMask(uint32_t mask) {
   log_v("Channel mask set to 0x%08x", mask);
 }
 
+void ZigbeeCore::stop() {
+  if (started()) {
+    vTaskSuspend(xTaskGetHandle("Zigbee_main"));
+    log_v("Zigbee stack stopped");
+    _started = false;
+  }
+  return;
+}
+
+void ZigbeeCore::start() {
+  if (!started()) {
+    vTaskResume(xTaskGetHandle("Zigbee_main"));
+    log_v("Zigbee stack started");
+    _started = true;
+  }
+  return;
+}
+
 // Function to convert enum value to string
 const char *ZigbeeCore::getDeviceTypeString(esp_zb_ha_standard_devices_t deviceId) {
   switch (deviceId) {

libraries/Zigbee/src/ZigbeeCore.h

@@ -139,6 +139,8 @@ class ZigbeeCore {
   bool begin(zigbee_role_t role = ZIGBEE_END_DEVICE, bool erase_nvs = false);
   bool begin(esp_zb_cfg_t *role_cfg, bool erase_nvs = false);
   // bool end();
+  void stop();
+  void start();
 
   bool started() {
     return _started;