diff --git a/code/nrf-connect/samples/zigbee/src/main.c b/code/nrf-connect/samples/zigbee/src/main.c
index 1b6b06d..2c06d60 100644
--- a/code/nrf-connect/samples/zigbee/src/main.c
+++ b/code/nrf-connect/samples/zigbee/src/main.c
@@ -11,6 +11,7 @@
 
 #include <dk_buttons_and_leds.h>
 #include <prstlib/adc.h>
+#include <prstlib/shtc3.h>
 #include <zb_nrf_platform.h>
 #include <zboss_api.h>
 #include <zboss_api_addons.h>
@@ -51,10 +52,12 @@ LOG_MODULE_REGISTER(app, LOG_LEVEL_INF);
 /* Main application customizable context.
  * Stores all settings and static values.
  */
+
 struct zb_device_ctx {
   zb_zcl_basic_attrs_ext_t basic_attr;
   zb_zcl_identify_attrs_t identify_attr;
   zb_zcl_temp_measurement_attrs_t temp_measure_attrs;
+  prst_rel_humidity_attrs_t rel_humidity_attrs;
 };
 
 /* Zigbee device application context storage. */
@@ -84,11 +87,18 @@ ZB_ZCL_DECLARE_TEMP_MEASUREMENT_ATTRIB_LIST(temp_measurement_attr_list,
                                             &dev_ctx.temp_measure_attrs.max_measure_value,
                                             &dev_ctx.temp_measure_attrs.tolerance);
 
+ZB_ZCL_DECLARE_REL_HUMIDITY_MEASUREMENT_ATTRIB_LIST(
+    rel_humi_attr_list,
+    &dev_ctx.rel_humidity_attrs.rel_humidity,
+    &dev_ctx.rel_humidity_attrs.min_val,
+    &dev_ctx.rel_humidity_attrs.max_val);
+
 ZB_DECLARE_RANGE_EXTENDER_CLUSTER_LIST(
     app_template_clusters,
     basic_attr_list,
     identify_attr_list,
-    temp_measurement_attr_list);
+    temp_measurement_attr_list,
+    rel_humi_attr_list);
 
 ZB_DECLARE_RANGE_EXTENDER_EP(
     app_template_ep,
@@ -120,6 +130,11 @@ static void app_clusters_attr_init(void) {
                       ZB_ZCL_CLUSTER_SERVER_ROLE, ZB_ZCL_ATTR_TEMP_MEASUREMENT_VALUE_ID,
                       (zb_uint8_t*)&temperature_value, ZB_FALSE);
 
+  static zb_int16_t rel_humidity = 3 * (UINT16_MAX / 4);
+  zb_zcl_set_attr_val(APP_TEMPLATE_ENDPOINT, ZB_ZCL_CLUSTER_ID_REL_HUMIDITY_MEASUREMENT,
+                      ZB_ZCL_CLUSTER_SERVER_ROLE, ZB_ZCL_ATTR_REL_HUMIDITY_MEASUREMENT_VALUE_ID,
+                      (zb_uint8_t*)&rel_humidity, ZB_FALSE);
+
   /* Identify cluster attributes data. */
   dev_ctx.identify_attr.identify_time =
       ZB_ZCL_IDENTIFY_IDENTIFY_TIME_DEFAULT_VALUE;
diff --git a/code/nrf-connect/samples/zigbee/src/zb_range_extender.h b/code/nrf-connect/samples/zigbee/src/zb_range_extender.h
index 58b9013..6ebf33e 100644
--- a/code/nrf-connect/samples/zigbee/src/zb_range_extender.h
+++ b/code/nrf-connect/samples/zigbee/src/zb_range_extender.h
@@ -24,7 +24,7 @@
 /** @cond internals_doc */
 
 /** Range extender IN (server) clusters number */
-#define ZB_RANGE_EXTENDER_IN_CLUSTER_NUM 3
+#define ZB_RANGE_EXTENDER_IN_CLUSTER_NUM 4
 
 /** Range extender OUT (client) clusters number */
 #define ZB_RANGE_EXTENDER_OUT_CLUSTER_NUM 0
@@ -37,13 +37,16 @@
 
 typedef struct {
   zb_uint16_t rel_humidity;
-} prst_rel_humidity_t;
+  zb_uint16_t min_val;
+  zb_uint16_t max_val;
+} prst_rel_humidity_attrs_t;
 
 #define ZB_DECLARE_RANGE_EXTENDER_CLUSTER_LIST(                             \
     cluster_list_name,                                                      \
     basic_attr_list,                                                        \
     identify_attr_list,                                                     \
-    temp_measurement_attr_list)                                             \
+    temp_measurement_attr_list,                                             \
+    rel_humidity_attr_list)                                                 \
   zb_zcl_cluster_desc_t cluster_list_name[] =                               \
       {                                                                     \
           ZB_ZCL_CLUSTER_DESC(                                              \
@@ -63,6 +66,12 @@ typedef struct {
               ZB_ZCL_ARRAY_SIZE(temp_measurement_attr_list, zb_zcl_attr_t), \
               (temp_measurement_attr_list),                                 \
               ZB_ZCL_CLUSTER_SERVER_ROLE,                                   \
+              ZB_ZCL_MANUF_CODE_INVALID),                                   \
+          ZB_ZCL_CLUSTER_DESC(                                              \
+              ZB_ZCL_CLUSTER_ID_REL_HUMIDITY_MEASUREMENT,                   \
+              ZB_ZCL_ARRAY_SIZE(rel_humidity_attr_list, zb_zcl_attr_t),     \
+              (rel_humi_attr_list),                                         \
+              ZB_ZCL_CLUSTER_SERVER_ROLE,                                   \
               ZB_ZCL_MANUF_CODE_INVALID)}
 
 /** @cond internals_doc */
@@ -87,7 +96,9 @@ typedef struct {
           in_clust_num,                                                                        \
           out_clust_num,                                                                       \
           {ZB_ZCL_CLUSTER_ID_BASIC,                                                            \
-           ZB_ZCL_CLUSTER_ID_IDENTIFY, ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT}}
+           ZB_ZCL_CLUSTER_ID_IDENTIFY,                                                         \
+           ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT,                                                 \
+           ZB_ZCL_CLUSTER_ID_REL_HUMIDITY_MEASUREMENT}}
 
 /** @endcond */ /* internals_doc */