diff --git a/nrf5/modules/ubluepy/modubluepy.h b/nrf5/modules/ubluepy/modubluepy.h
index aef5408542..685a54b5e9 100644
--- a/nrf5/modules/ubluepy/modubluepy.h
+++ b/nrf5/modules/ubluepy/modubluepy.h
@@ -37,6 +37,9 @@ p.advertise(device_name="MicroPython")
 
 DB setup:
 
+def event_handler(id, length, data):
+    print("BLE event:", id, " length: ", length)
+
 from ubluepy import Service, Characteristic, UUID, Peripheral
 u0 = UUID("6e400001-b5a3-f393-e0a9-e50e24dcca9e")
 s = Service(u0)
@@ -44,6 +47,7 @@ u1 = UUID("6e400002-b5a3-f393-e0a9-e50e24dcca9e")
 c = Characteristic(u1)
 s.addCharacteristic(c)
 p = Peripheral()
+p.setConnectionHandler(event_handler)
 p.advertise(device_name="micr", services=[s])
 */
 
@@ -104,6 +108,6 @@ typedef struct _ubluepy_advertise_data_t {
     uint8_t    num_of_services;
 } ubluepy_advertise_data_t;
 
-
+typedef void (*ubluepy_evt_callback_t)(mp_obj_t self, uint16_t event_id, uint16_t length, uint8_t * data);
 
 #endif // UBLUEPY_H__
diff --git a/nrf5/modules/ubluepy/ubluepy_peripheral.c b/nrf5/modules/ubluepy/ubluepy_peripheral.c
index 12d50fe96f..aa55b8ff48 100644
--- a/nrf5/modules/ubluepy/ubluepy_peripheral.c
+++ b/nrf5/modules/ubluepy/ubluepy_peripheral.c
@@ -39,6 +39,25 @@ STATIC void ubluepy_peripheral_print(const mp_print_t *print, mp_obj_t o, mp_pri
     mp_printf(print, "Peripheral");
 }
 
+STATIC void event_handler(mp_obj_t self_in, uint16_t event_id, uint16_t length, uint8_t * data) {
+    ubluepy_peripheral_obj_t *self = MP_OBJ_TO_PTR(self_in);
+
+    mp_obj_t args[3];
+    mp_uint_t num_of_args = 3;
+    args[0] = MP_OBJ_NEW_SMALL_INT(event_id);
+    args[1] = MP_OBJ_NEW_SMALL_INT(length);
+    if (data != NULL) {
+        args[2] = mp_obj_new_bytearray_by_ref(length, data);
+    } else {
+        args[2] = mp_const_none;
+    }
+
+    // for now hard-code all events to conn_handler
+    mp_call_function_n_kw(self->conn_handler, num_of_args, 0, args);
+
+    (void)self;
+}
+
 STATIC mp_obj_t ubluepy_peripheral_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
     enum {
         ARG_NEW_DEVICE_ADDR,
@@ -46,8 +65,8 @@ STATIC mp_obj_t ubluepy_peripheral_make_new(const mp_obj_type_t *type, size_t n_
     };
 
     static const mp_arg_t allowed_args[] = {
-        { ARG_NEW_DEVICE_ADDR, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
-        { ARG_NEW_ADDR_TYPE,   MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { ARG_NEW_DEVICE_ADDR, MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { ARG_NEW_ADDR_TYPE,   MP_ARG_OBJ, {.u_obj = mp_const_none} },
     };
 
     // parse args
@@ -57,21 +76,11 @@ STATIC mp_obj_t ubluepy_peripheral_make_new(const mp_obj_type_t *type, size_t n_
     ubluepy_peripheral_obj_t *s = m_new_obj(ubluepy_peripheral_obj_t);
     s->base.type = type;
 
+	sd_event_handler_set(MP_OBJ_FROM_PTR(s), event_handler);
+
     return MP_OBJ_FROM_PTR(s);
 }
 
-#if 0
-static void peripheral_delegate(void) {
-    // delegate
-    mp_obj_t args[3];
-    mp_uint_t num_of_args = 3;
-    args[0] = type;
-    args[1] = MP_OBJ_NEW_SMALL_INT(size);
-    args[2] = mp_obj_new_bytearray_by_ref(size, evt_data);
-    mp_call_function_n_kw(delegate->handleConnection, num_of_args, 0, args);
-}
-#endif
-
 /// \method withDelegate(DefaultDelegate)
 /// Set delegate instance for handling Bluetooth LE events.
 ///
diff --git a/nrf5/sdk/softdevice.c b/nrf5/sdk/softdevice.c
index 9efe8f8327..0cfd2beb27 100644
--- a/nrf5/sdk/softdevice.c
+++ b/nrf5/sdk/softdevice.c
@@ -41,7 +41,10 @@ if (sd_enabled() == 0) { \
     (void)sd_enable(); \
 }
 
-bool m_adv_in_progress = false;
+static bool m_adv_in_progress = false;
+
+static ubluepy_evt_callback_t ubluepy_event_handler;
+static mp_obj_t               mp_observer;
 
 #if (BLUETOOTH_SD != 100) && (BLUETOOTH_SD != 110)
 #include "nrf_nvic.h"
@@ -445,6 +448,11 @@ bool sd_advertise_data(ubluepy_advertise_data_t * p_adv_params) {
     return true;
 }
 
+void sd_event_handler_set(mp_obj_t obj, ubluepy_evt_callback_t evt_handler) {
+    mp_observer = obj;
+    ubluepy_event_handler = evt_handler;
+}
+
 static void ble_evt_handler(ble_evt_t * p_ble_evt) {
 // S132 event ranges.
 // Common 0x01 -> 0x0F
@@ -455,6 +463,7 @@ static void ble_evt_handler(ble_evt_t * p_ble_evt) {
 
     switch (p_ble_evt->header.evt_id) {
         case BLE_GAP_EVT_CONNECTED:
+            ubluepy_event_handler(mp_observer, BLE_GAP_EVT_CONNECTED, p_ble_evt->header.evt_len - sizeof(uint16_t), NULL);
             printf("GAP CONNECT\n");
             break;
 
diff --git a/nrf5/sdk/softdevice.h b/nrf5/sdk/softdevice.h
index ba79d89866..f17395e517 100644
--- a/nrf5/sdk/softdevice.h
+++ b/nrf5/sdk/softdevice.h
@@ -49,4 +49,7 @@ bool sd_service_add(ubluepy_service_obj_t * p_service_obj);
 bool sd_characteristic_add(ubluepy_characteristic_obj_t * p_char_obj);
 
 bool sd_advertise_data(ubluepy_advertise_data_t * p_adv_params);
+
+void sd_event_handler_set(mp_obj_t obs, ubluepy_evt_callback_t evt_handler);
+
 #endif // BLUETOOTH_LE_DRIVER_H__