diff --git a/sys/auto_init/auto_init.c b/sys/auto_init/auto_init.c
index 883ed40eef..e4d06852d0 100644
--- a/sys/auto_init/auto_init.c
+++ b/sys/auto_init/auto_init.c
@@ -429,6 +429,11 @@ auto_init_mpu9150();
     auto_init_mma7660();
 #endif
 
+#ifdef MODULE_SHT3X
+    extern void auto_init_sht3x(void);
+    auto_init_sht3x();
+#endif
+
 #endif /* MODULE_AUTO_INIT_SAUL */
 
 #ifdef MODULE_AUTO_INIT_GNRC_RPL
diff --git a/sys/auto_init/saul/auto_init_sht3x.c b/sys/auto_init/saul/auto_init_sht3x.c
new file mode 100644
index 0000000000..8093166eca
--- /dev/null
+++ b/sys/auto_init/saul/auto_init_sht3x.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2018 Gunar Schorcht
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     sys_auto_init_saul
+ * @brief       Auto initialization of Sensirion SHT30/SHT31/SHT35 device driver
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ * @file
+ */
+
+#ifdef MODULE_SHT3X
+
+#include "assert.h"
+#include "log.h"
+#include "saul_reg.h"
+#include "sht3x.h"
+#include "sht3x_params.h"
+
+/**
+ * @brief   Define the number of configured sensors
+ */
+#define SHT3X_NUM      (sizeof(sht3x_params) / sizeof(sht3x_params[0]))
+
+/**
+ * @brief   Allocation of memory for device descriptors
+ */
+sht3x_dev_t sht3x_devs[SHT3X_NUM];
+
+/**
+ * @brief   Memory for the SAUL registry entries
+ */
+static saul_reg_t saul_entries[SHT3X_NUM * 2];
+
+/**
+ * @brief   Define the number of saul info
+ */
+#define SHT3X_INFO_NUM (sizeof(sht3x_saul_info) / sizeof(sht3x_saul_info[0]))
+
+/**
+ * @name    Reference the driver structs.
+ * @{
+ */
+extern const saul_driver_t sht3x_saul_driver_temperature;
+extern const saul_driver_t sht3x_saul_driver_humidity;
+/** @} */
+
+void auto_init_sht3x(void)
+{
+    assert(SHT3X_INFO_NUM == SHT3X_NUM);
+
+    for (unsigned i = 0; i < SHT3X_NUM; i++) {
+        LOG_DEBUG("[auto_init_saul] initializing sht3x #%u\n", i);
+
+        if (sht3x_init(&sht3x_devs[i],
+                       &sht3x_params[i]) != SHT3X_OK) {
+            LOG_ERROR("[auto_init_saul] error initializing sht3x #%u\n", i);
+            continue;
+        }
+
+        /* temperature */
+        saul_entries[(i * 2)].dev = &(sht3x_devs[i]);
+        saul_entries[(i * 2)].name = sht3x_saul_info[i].name;
+        saul_entries[(i * 2)].driver = &sht3x_saul_driver_temperature;
+
+        /* relative humidity */
+        saul_entries[(i * 2) + 1].dev = &(sht3x_devs[i]);
+        saul_entries[(i * 2) + 1].name = sht3x_saul_info[i].name;
+        saul_entries[(i * 2) + 1].driver = &sht3x_saul_driver_humidity;
+
+        /* register to saul */
+        saul_reg_add(&(saul_entries[(i * 2)]));
+        saul_reg_add(&(saul_entries[(i * 2) + 1]));
+    }
+}
+#else
+typedef int dont_be_pedantic;
+#endif /* MODULE_SHT3X */