diff --git a/ports/nrf/bluetooth/ble_drv.h b/ports/nrf/bluetooth/ble_drv.h
index cdb4c9b033..133d77b48d 100644
--- a/ports/nrf/bluetooth/ble_drv.h
+++ b/ports/nrf/bluetooth/ble_drv.h
@@ -30,10 +30,6 @@
 
 #include "ble.h"
 
-#if (BLUETOOTH_SD == 132) && (BLE_API_VERSION == 2)
-#define NRF52
-#endif
-
 #define MAX_TX_IN_PROGRESS 10
 
 #ifndef BLE_GATT_ATT_MTU_DEFAULT
@@ -43,6 +39,7 @@
 #define BLE_CONN_CFG_TAG_CUSTOM 1
 
 #define MSEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000) / (RESOLUTION))
+#define SEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000000) / (RESOLUTION))
 // 0.625 msecs (625 usecs)
 #define ADV_INTERVAL_UNIT_FLOAT_SECS (0.000625)
 #define UNIT_0_625_MS (625)
diff --git a/ports/nrf/common-hal/bleio/Scanner.c b/ports/nrf/common-hal/bleio/Scanner.c
index d2e19b5f9f..d4479515e7 100644
--- a/ports/nrf/common-hal/bleio/Scanner.c
+++ b/ports/nrf/common-hal/bleio/Scanner.c
@@ -36,14 +36,12 @@
 #include "shared-bindings/bleio/Scanner.h"
 #include "shared-module/bleio/ScanEntry.h"
 
-#if (BLUETOOTH_SD == 140)
 static uint8_t m_scan_buffer_data[BLE_GAP_SCAN_BUFFER_MIN];
 
 static ble_data_t m_scan_buffer = {
     m_scan_buffer_data,
     BLE_GAP_SCAN_BUFFER_MIN
 };
-#endif
 
 STATIC void on_ble_evt(ble_evt_t *ble_evt, void *scanner_in) {
     bleio_scanner_obj_t *scanner = (bleio_scanner_obj_t*)scanner_in;
@@ -61,48 +59,34 @@ STATIC void on_ble_evt(ble_evt_t *ble_evt, void *scanner_in) {
     entry->address.type = report->peer_addr.addr_type;
     memcpy(entry->address.value, report->peer_addr.addr, BLEIO_ADDRESS_BYTES);
 
-#if (BLUETOOTH_SD == 140)
     entry->data = mp_obj_new_bytearray(report->data.len, report->data.p_data);
-#else
-    entry->data = mp_obj_new_bytearray(report->dlen, report->data);
-#endif
 
     mp_obj_list_append(scanner->adv_reports, entry);
 
-#if (BLUETOOTH_SD == 140)
     const uint32_t err_code = sd_ble_gap_scan_start(NULL, &m_scan_buffer);
     if (err_code != NRF_SUCCESS) {
         mp_raise_OSError_msg_varg(translate("Failed to continue scanning, err 0x%04x"), err_code);
     }
-#endif
 }
 
-void common_hal_bleio_scanner_scan(bleio_scanner_obj_t *self, mp_int_t timeout) {
+void common_hal_bleio_scanner_scan(bleio_scanner_obj_t *self, mp_float_t timeout, mp_float_t interval, mp_float_t window) {
     ble_drv_add_event_handler(on_ble_evt, self);
 
     ble_gap_scan_params_t scan_params = {
-        .interval = MSEC_TO_UNITS(self->interval, UNIT_0_625_MS),
-        .window = MSEC_TO_UNITS(self->window, UNIT_0_625_MS),
-#if (BLUETOOTH_SD == 140)
+        .interval = SEC_TO_UNITS(interval, UNIT_0_625_MS),
+        .window = SEC_TO_UNITS(window, UNIT_0_625_MS),
         .scan_phys = BLE_GAP_PHY_1MBPS,
-#endif
     };
 
     common_hal_bleio_adapter_set_enabled(true);
 
     uint32_t err_code;
-#if (BLUETOOTH_SD == 140)
     err_code = sd_ble_gap_scan_start(&scan_params, &m_scan_buffer);
-#else
-    err_code = sd_ble_gap_scan_start(&scan_params);
-#endif
 
     if (err_code != NRF_SUCCESS) {
         mp_raise_OSError_msg_varg(translate("Failed to start scanning, err 0x%04x"), err_code);
     }
 
-    if (timeout > 0) {
-        mp_hal_delay_ms(timeout);
-        sd_ble_gap_scan_stop();
-    }
+    mp_hal_delay_ms(timeout * 1000);
+    sd_ble_gap_scan_stop();
 }
diff --git a/shared-bindings/bleio/Scanner.c b/shared-bindings/bleio/Scanner.c
index 73b6e6a0b2..5615ce1030 100644
--- a/shared-bindings/bleio/Scanner.c
+++ b/shared-bindings/bleio/Scanner.c
@@ -30,8 +30,12 @@
 #include "shared-bindings/bleio/ScanEntry.h"
 #include "shared-bindings/bleio/Scanner.h"
 
-#define DEFAULT_INTERVAL 100
-#define DEFAULT_WINDOW 100
+#define INTERVAL_DEFAULT (0.1f)
+#define INTERVAL_MIN (0.0025f)
+#define INTERVAL_MIN_STRING "0.0025"
+#define INTERVAL_MAX (40.959375f)
+#define INTERVAL_MAX_STRING "40.959375"
+#define WINDOW_DEFAULT (0.1f)
 
 //| .. currentmodule:: bleio
 //|
@@ -45,109 +49,76 @@
 //|    import bleio
 //|    scanner = bleio.Scanner()
 //|    entries = scanner.scan(2.5)  # Scan for 2.5 seconds
-//|    print(entries)
 //|
 
 //| .. class:: Scanner()
 //|
 //|   Create a new Scanner object.
 //|
-
-//|   .. attribute:: interval
-//|
-//|     The interval (in seconds) between the start of two consecutive scan windows.
-//|     Allowed values are between 0.010 and 10.24 sec.
-//|
-
-//|   .. attribute:: window
-//|
-//|     The duration (in seconds) in which a single BLE channel is scanned.
-//|     Allowed values are between 0.010 and 10.24 sec.
-//|
-
-//|   .. method:: scan(timeout)
-//|
-//|     Performs a BLE scan.
-//|
-//|     :param float timeout: the scan timeout in seconds
-//|     :returns: advertising packets found
-//|     :rtype: list of :py:class:`bleio.ScanEntry`
-//|
 STATIC mp_obj_t bleio_scanner_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *all_args, mp_map_t *kw_args) {
     mp_arg_check_num(n_args, kw_args, 0, 0, false);
 
-
     bleio_scanner_obj_t *self = m_new_obj(bleio_scanner_obj_t);
     self->base.type = type;
 
-    self->interval = DEFAULT_INTERVAL;
-    self->window = DEFAULT_WINDOW;
-
     return MP_OBJ_FROM_PTR(self);
 }
 
-STATIC mp_obj_t bleio_scanner_get_interval(mp_obj_t self_in) {
-    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(self_in);
+//|   .. method:: scan(timeout, \*, interval=0.1, window=0.1)
+//|
+//|     Performs a BLE scan.
+//|
+//|     :param float timeout: the scan timeout in seconds
+//|     :param float interval: the interval (in seconds) between the start of two consecutive scan windows
+//|        Must be in the range 0.0025 - 40.959375 seconds.
+//|     :param float window: the duration (in seconds) to scan a single BLE channel
+//|        `window` must be <= `interval`.
+//|     :returns: advertising packets found
+//|     :rtype: list of :py:class:`bleio.ScanEntry`
+//|
+STATIC mp_obj_t bleio_scanner_scan(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_timeout, ARG_interval, ARG_window };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_timeout,  MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_interval, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_window,   MP_ARG_KW_ONLY | MP_ARG_INT, {.u_obj = MP_OBJ_NULL} },
+    };
 
-    return mp_obj_new_int(self->interval);
-}
-MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanner_get_interval_obj, bleio_scanner_get_interval);
+    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-static mp_obj_t bleio_scanner_set_interval(mp_obj_t self_in, mp_obj_t value) {
-    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    const mp_float_t timeout = mp_obj_get_float(args[ARG_timeout].u_obj);
 
-    self->interval = mp_obj_get_int(value);
+    if (args[ARG_interval].u_obj == MP_OBJ_NULL) {
+        args[ARG_interval].u_obj = mp_obj_new_float(INTERVAL_DEFAULT);
+    }
 
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(bleio_scanner_set_interval_obj, bleio_scanner_set_interval);
+    if (args[ARG_window].u_obj == MP_OBJ_NULL) {
+        args[ARG_window].u_obj = mp_obj_new_float(WINDOW_DEFAULT);
+    }
 
-const mp_obj_property_t bleio_scanner_interval_obj = {
-    .base.type = &mp_type_property,
-    .proxy = { (mp_obj_t)&bleio_scanner_get_interval_obj,
-               (mp_obj_t)&bleio_scanner_set_interval_obj,
-               (mp_obj_t)&mp_const_none_obj },
-};
+    const mp_float_t interval = mp_obj_float_get(args[ARG_interval].u_obj);
+    if (interval < INTERVAL_MIN || interval > INTERVAL_MAX) {
+        mp_raise_ValueError_varg(translate("interval must be in range %s-%s"), INTERVAL_MIN_STRING, INTERVAL_MAX_STRING);
+    }
 
-STATIC mp_obj_t scanner_scan(mp_obj_t self_in, mp_obj_t timeout_in) {
-    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(self_in);
-    const mp_int_t timeout = mp_obj_get_int(timeout_in);
+    const mp_float_t window = mp_obj_float_get(args[ARG_window].u_obj);
+    if (window > interval) {
+        mp_raise_ValueError(translate("window must be <= interval"));
+    }
 
     self->adv_reports = mp_obj_new_list(0, NULL);
 
-    common_hal_bleio_scanner_scan(self, timeout);
+    common_hal_bleio_scanner_scan(self, timeout, interval, window);
 
     return self->adv_reports;
 }
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(bleio_scanner_scan_obj, scanner_scan);
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bleio_scanner_scan_obj, 2, bleio_scanner_scan);
 
-STATIC mp_obj_t bleio_scanner_get_window(mp_obj_t self_in) {
-    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(self_in);
-
-    return mp_obj_new_int(self->window);
-}
-MP_DEFINE_CONST_FUN_OBJ_1(bleio_scanner_get_window_obj, bleio_scanner_get_window);
-
-static mp_obj_t bleio_scanner_set_window(mp_obj_t self_in, mp_obj_t value) {
-    bleio_scanner_obj_t *self = MP_OBJ_TO_PTR(self_in);
-
-    self->window = mp_obj_get_int(value);
-
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(bleio_scanner_set_window_obj, bleio_scanner_set_window);
-
-const mp_obj_property_t bleio_scanner_window_obj = {
-    .base.type = &mp_type_property,
-    .proxy = { (mp_obj_t)&bleio_scanner_get_window_obj,
-               (mp_obj_t)&bleio_scanner_set_window_obj,
-               (mp_obj_t)&mp_const_none_obj },
-};
 
 STATIC const mp_rom_map_elem_t bleio_scanner_locals_dict_table[] = {
-    { MP_ROM_QSTR(MP_QSTR_interval), MP_ROM_PTR(&bleio_scanner_interval_obj) },
     { MP_ROM_QSTR(MP_QSTR_scan), MP_ROM_PTR(&bleio_scanner_scan_obj) },
-    { MP_ROM_QSTR(MP_QSTR_window), MP_ROM_PTR(&bleio_scanner_window_obj) },
 };
 
 STATIC MP_DEFINE_CONST_DICT(bleio_scanner_locals_dict, bleio_scanner_locals_dict_table);
@@ -155,7 +126,6 @@ STATIC MP_DEFINE_CONST_DICT(bleio_scanner_locals_dict, bleio_scanner_locals_dict
 const mp_obj_type_t bleio_scanner_type = {
     { &mp_type_type },
     .name = MP_QSTR_Scanner,
-    .print = bleio_scanner_print,
     .make_new = bleio_scanner_make_new,
     .locals_dict = (mp_obj_dict_t*)&bleio_scanner_locals_dict
 };
diff --git a/shared-bindings/bleio/Scanner.h b/shared-bindings/bleio/Scanner.h
index c72136389b..54c09675ba 100644
--- a/shared-bindings/bleio/Scanner.h
+++ b/shared-bindings/bleio/Scanner.h
@@ -33,7 +33,7 @@
 
 extern const mp_obj_type_t bleio_scanner_type;
 
-extern void common_hal_bleio_scanner_scan(bleio_scanner_obj_t *self, mp_int_t timeout);
+void common_hal_bleio_scanner_scan(bleio_scanner_obj_t *self, mp_float_t timeout, mp_float_t interval, mp_float_t window);
 extern void common_hal_bleio_scanner_stop(bleio_scanner_obj_t *self);
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_BLEIO_SCANNER_H
diff --git a/shared-bindings/bleio/__init__.c b/shared-bindings/bleio/__init__.c
index 7348655acc..907d211016 100644
--- a/shared-bindings/bleio/__init__.c
+++ b/shared-bindings/bleio/__init__.c
@@ -64,8 +64,8 @@
 //     Descriptor
 //     Device
 //|     Peripheral
-//    ScanEntry
-//    Scanner
+//|    ScanEntry
+//|    Scanner
 //|     Service
 //|     UUID
 //|
@@ -86,8 +86,8 @@ STATIC const mp_rom_map_elem_t bleio_module_globals_table[] = {
 //    { MP_ROM_QSTR(MP_QSTR_Descriptor),        MP_ROM_PTR(&bleio_descriptor_type) },
     { MP_ROM_QSTR(MP_QSTR_Peripheral),        MP_ROM_PTR(&bleio_peripheral_type) },
 // Hide work-in-progress.
-//    { MP_ROM_QSTR(MP_QSTR_ScanEntry),         MP_ROM_PTR(&bleio_scanentry_type) },
-//    { MP_ROM_QSTR(MP_QSTR_Scanner),           MP_ROM_PTR(&bleio_scanner_type) },
+    { MP_ROM_QSTR(MP_QSTR_ScanEntry),         MP_ROM_PTR(&bleio_scanentry_type) },
+    { MP_ROM_QSTR(MP_QSTR_Scanner),           MP_ROM_PTR(&bleio_scanner_type) },
     { MP_ROM_QSTR(MP_QSTR_Service),           MP_ROM_PTR(&bleio_service_type) },
     { MP_ROM_QSTR(MP_QSTR_UUID),              MP_ROM_PTR(&bleio_uuid_type) },