diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index 6ee4d816a5..d7f95091c8 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-12-10 16:56+0530\n"
+"POT-Creation-Date: 2020-12-17 19:42+0530\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -936,6 +936,10 @@ msgstr ""
 msgid "Filters too complex"
 msgstr ""
 
+#: ports/esp32s2/common-hal/dualbank/__init__.c
+msgid "Firmware image is invalid"
+msgstr ""
+
 #: ports/cxd56/common-hal/camera/Camera.c
 msgid "Format not supported"
 msgstr ""
@@ -1420,10 +1424,6 @@ msgstr ""
 msgid "Not settable"
 msgstr ""
 
-#: ports/esp32s2/common-hal/ota/__init__.c
-msgid "OTA Update Failed"
-msgstr ""
-
 #: shared-bindings/util.c
 msgid ""
 "Object has been deinitialized and can no longer be used. Create a new object."
@@ -1911,10 +1911,6 @@ msgstr ""
 msgid "Unable to read color palette data"
 msgstr ""
 
-#: ports/esp32s2/common-hal/ota/__init__.c
-msgid "Unable to switch boot partition"
-msgstr ""
-
 #: shared-bindings/nvm/ByteArray.c
 msgid "Unable to write to nvm."
 msgstr ""
@@ -1983,6 +1979,10 @@ msgstr ""
 msgid "Unsupported pull value."
 msgstr ""
 
+#: ports/esp32s2/common-hal/dualbank/__init__.c
+msgid "Update Failed"
+msgstr ""
+
 #: ports/nrf/common-hal/_bleio/Characteristic.c
 #: ports/nrf/common-hal/_bleio/Descriptor.c
 msgid "Value length != required fixed length"
@@ -3210,7 +3210,7 @@ msgstr ""
 msgid "offset is too large"
 msgstr ""
 
-#: shared-bindings/ota/__init__.c
+#: shared-bindings/dualbank/__init__.c
 msgid "offset must be >= 0"
 msgstr ""
 
diff --git a/ports/esp32s2/common-hal/ota/__init__.c b/ports/esp32s2/common-hal/dualbank/__init__.c
similarity index 76%
rename from ports/esp32s2/common-hal/ota/__init__.c
rename to ports/esp32s2/common-hal/dualbank/__init__.c
index 5ea25fb5d4..0f468a036b 100644
--- a/ports/esp32s2/common-hal/ota/__init__.c
+++ b/ports/esp32s2/common-hal/dualbank/__init__.c
@@ -24,8 +24,8 @@
  * THE SOFTWARE.
  */
 
-#include "common-hal/ota/__init__.h"
-#include "shared-bindings/ota/__init__.h"
+#include "common-hal/dualbank/__init__.h"
+#include "shared-bindings/dualbank/__init__.h"
 
 #include <string.h>
 
@@ -35,21 +35,24 @@
 static const esp_partition_t *update_partition = NULL;
 static esp_ota_handle_t update_handle = 0;
 
-static bool ota_inited = false;
-static const char *TAG = "OTA";
+static const char *TAG = "dualbank";
 
-void ota_reset(void) {
-    update_handle = 0;
-    update_partition = NULL;
-    ota_inited = false;
+void dualbank_reset(void) {
+    // should use `abort` instead of `end`
+    // but not in idf v4.2
+    // esp_ota_abort(update_handle);
+    if (esp_ota_end(update_handle) == ESP_OK) {
+        update_handle = 0;
+        update_partition = NULL;
+    }
 }
 
 static void __attribute__((noreturn)) task_fatal_error(void) {
     ESP_LOGE(TAG, "Exiting task due to fatal error...");
-    mp_raise_RuntimeError(translate("OTA Update Failed"));
+    mp_raise_RuntimeError(translate("Update Failed"));
 }
 
-void common_hal_ota_flash(const void *buf, const size_t len, const int32_t offset) {
+void common_hal_dualbank_flash(const void *buf, const size_t len, const size_t offset) {
     esp_err_t err;
 
     const esp_partition_t *running = esp_ota_get_running_partition();
@@ -67,7 +70,7 @@ void common_hal_ota_flash(const void *buf, const size_t len, const int32_t offse
         assert(update_partition != NULL);
     }
 
-    if (!ota_inited) {
+    if (update_handle == 0) {
         if (len > sizeof(esp_image_header_t) + sizeof(esp_image_segment_header_t) + sizeof(esp_app_desc_t)) {
             esp_app_desc_t new_app_info;
             memcpy(&new_app_info, &((char *)buf)[sizeof(esp_image_header_t) + sizeof(esp_image_segment_header_t)], sizeof(esp_app_desc_t));
@@ -102,14 +105,13 @@ void common_hal_ota_flash(const void *buf, const size_t len, const int32_t offse
                 ESP_LOGE(TAG, "esp_ota_begin failed (%s)", esp_err_to_name(err));
                 task_fatal_error();
             }
-            ota_inited = true;
         } else {
             ESP_LOGE(TAG, "received package is not fit len");
             task_fatal_error();
         }
     }
 
-    if (offset == -1) {
+    if (offset == 0) {
         err = esp_ota_write(update_handle, buf, len);
     } else {
         err = esp_ota_write_with_offset(update_handle, buf, len, offset);
@@ -120,31 +122,18 @@ void common_hal_ota_flash(const void *buf, const size_t len, const int32_t offse
     }
 }
 
-void common_hal_ota_finish(void) {
-    if (ota_inited) {
-        esp_err_t err;
-
-        err = esp_ota_end(update_handle);
-        if (err != ESP_OK) {
-            if (err == ESP_ERR_OTA_VALIDATE_FAILED) {
-                ESP_LOGE(TAG, "Image validation failed, image is corrupted");
-            }
-            ESP_LOGE(TAG, "esp_ota_end failed (%s)!", esp_err_to_name(err));
-            task_fatal_error();
+void common_hal_dualbank_switch(void) {
+    if (esp_ota_end(update_handle) == ESP_OK) {
+        update_handle = 0;
+        update_partition = NULL;
+    }
+    esp_err_t err = esp_ota_set_boot_partition(esp_ota_get_next_update_partition(NULL));
+    if (err != ESP_OK) {
+        if (err == ESP_ERR_OTA_VALIDATE_FAILED) {
+            ESP_LOGE(TAG, "Image validation failed, image is corrupted");
+            mp_raise_RuntimeError(translate("Firmware image is invalid"));
         }
-
-        err = esp_ota_set_boot_partition(update_partition);
-        if (err != ESP_OK) {
-            ESP_LOGE(TAG, "esp_ota_set_boot_partition failed (%s)!", esp_err_to_name(err));
-            task_fatal_error();
-        }
-
-        ota_reset();
-    }
-}
-
-void common_hal_ota_switch(void) {
-    if (esp_ota_set_boot_partition(esp_ota_get_next_update_partition(NULL)) != ESP_OK) {
-        mp_raise_RuntimeError(translate("Unable to switch boot partition"));
+        ESP_LOGE(TAG, "esp_ota_set_boot_partition failed (%s)!", esp_err_to_name(err));
+        task_fatal_error();
     }
 }
diff --git a/ports/esp32s2/common-hal/ota/__init__.h b/ports/esp32s2/common-hal/dualbank/__init__.h
similarity index 84%
rename from ports/esp32s2/common-hal/ota/__init__.h
rename to ports/esp32s2/common-hal/dualbank/__init__.h
index 983b57e3f2..8b18336c94 100644
--- a/ports/esp32s2/common-hal/ota/__init__.h
+++ b/ports/esp32s2/common-hal/dualbank/__init__.h
@@ -24,9 +24,9 @@
  * THE SOFTWARE.
  */
 
-#ifndef MICROPY_INCLUDED_ESP32S2_COMMON_HAL_OTA___INIT___H
-#define MICROPY_INCLUDED_ESP32S2_COMMON_HAL_OTA___INIT___H
+#ifndef MICROPY_INCLUDED_ESP32S2_COMMON_HAL_DUALBANK___INIT___H
+#define MICROPY_INCLUDED_ESP32S2_COMMON_HAL_DUALBANK___INIT___H
 
-extern void ota_reset(void);
+extern void dualbank_reset(void);
 
-#endif //MICROPY_INCLUDED_ESP32S2_COMMON_HAL_OTA___INIT___H
+#endif //MICROPY_INCLUDED_ESP32S2_COMMON_HAL_DUALBANK___INIT___H
diff --git a/ports/esp32s2/mpconfigport.mk b/ports/esp32s2/mpconfigport.mk
index da231107fb..2ad8afb51c 100644
--- a/ports/esp32s2/mpconfigport.mk
+++ b/ports/esp32s2/mpconfigport.mk
@@ -19,11 +19,11 @@ CIRCUITPY_AUDIOBUSIO = 0
 CIRCUITPY_AUDIOIO = 0
 CIRCUITPY_CANIO = 1
 CIRCUITPY_COUNTIO = 1
+CIRCUITPY_DUALBANK = 1
 CIRCUITPY_FREQUENCYIO = 1
 CIRCUITPY_I2CPERIPHERAL = 0
 CIRCUITPY_ROTARYIO = 1
 CIRCUITPY_NVM = 1
-CIRCUITPY_OTA = 1
 # We don't have enough endpoints to include MIDI.
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_WIFI = 1
diff --git a/ports/esp32s2/supervisor/port.c b/ports/esp32s2/supervisor/port.c
index 201d9962e2..a56ac61c81 100644
--- a/ports/esp32s2/supervisor/port.c
+++ b/ports/esp32s2/supervisor/port.c
@@ -41,7 +41,7 @@
 #include "common-hal/busio/I2C.h"
 #include "common-hal/busio/SPI.h"
 #include "common-hal/busio/UART.h"
-#include "common-hal/ota/__init__.h"
+#include "common-hal/dualbank/__init__.h"
 #include "common-hal/ps2io/Ps2.h"
 #include "common-hal/pulseio/PulseIn.h"
 #include "common-hal/pwmio/PWMOut.h"
@@ -124,8 +124,8 @@ void reset_port(void) {
     analogout_reset();
 #endif
 
-#if CIRCUITPY_OTA
-    ota_reset();
+#if CIRCUITPY_DUALBANK
+    dualbank_reset();
 #endif
 
 #if CIRCUITPY_PS2IO
diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 68e806d4b2..a871479141 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -205,8 +205,8 @@ endif
 ifeq ($(CIRCUITPY_OS),1)
 SRC_PATTERNS += os/%
 endif
-ifeq ($(CIRCUITPY_OTA),1)
-SRC_PATTERNS += ota/%
+ifeq ($(CIRCUITPY_DUALBANK),1)
+SRC_PATTERNS += dualbank/%
 endif
 ifeq ($(CIRCUITPY_PIXELBUF),1)
 SRC_PATTERNS += _pixelbuf/%
@@ -350,7 +350,7 @@ SRC_COMMON_HAL_ALL = \
 	nvm/ByteArray.c \
 	nvm/__init__.c \
 	os/__init__.c \
-	ota/__init__.c \
+	dualbank/__init__.c \
 	ps2io/Ps2.c \
 	ps2io/__init__.c \
 	pulseio/PulseIn.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index 6a0daa7e9b..08c92a77ef 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -539,11 +539,11 @@ extern const struct _mp_obj_module_t os_module;
 #define OS_MODULE_ALT_NAME
 #endif
 
-#if CIRCUITPY_OTA
-extern const struct _mp_obj_module_t ota_module;
-#define OTA_MODULE           { MP_OBJ_NEW_QSTR(MP_QSTR_ota), (mp_obj_t)&ota_module },
+#if CIRCUITPY_DUALBANK
+extern const struct _mp_obj_module_t dualbank_module;
+#define DUALBANK_MODULE           { MP_OBJ_NEW_QSTR(MP_QSTR_dualbank), (mp_obj_t)&dualbank_module },
 #else
-#define OTA_MODULE
+#define DUALBANK_MODULE
 #endif
 
 #if CIRCUITPY_PEW
@@ -834,7 +834,7 @@ extern const struct _mp_obj_module_t wifi_module;
     NETWORK_MODULE \
       SOCKET_MODULE \
       WIZNET_MODULE \
-    OTA_MODULE \
+    DUALBANK_MODULE \
     PEW_MODULE \
     PIXELBUF_MODULE \
     PS2IO_MODULE \
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index 09074bf53c..af1dccf024 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -179,8 +179,8 @@ CFLAGS += -DCIRCUITPY_NVM=$(CIRCUITPY_NVM)
 CIRCUITPY_OS ?= 1
 CFLAGS += -DCIRCUITPY_OS=$(CIRCUITPY_OS)
 
-CIRCUITPY_OTA ?= 0
-CFLAGS += -DCIRCUITPY_OTA=$(CIRCUITPY_OTA)
+CIRCUITPY_DUALBANK ?= 0
+CFLAGS += -DCIRCUITPY_DUALBANK=$(CIRCUITPY_DUALBANK)
 
 CIRCUITPY_PIXELBUF ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_PIXELBUF=$(CIRCUITPY_PIXELBUF)
diff --git a/shared-bindings/ota/__init__.c b/shared-bindings/dualbank/__init__.c
similarity index 55%
rename from shared-bindings/ota/__init__.c
rename to shared-bindings/dualbank/__init__.c
index 8ecc6d9c41..8021ab18b9 100644
--- a/shared-bindings/ota/__init__.c
+++ b/shared-bindings/dualbank/__init__.c
@@ -24,19 +24,20 @@
  * THE SOFTWARE.
  */
 
-#include "shared-bindings/ota/__init__.h"
+#include "shared-bindings/dualbank/__init__.h"
 
-//| """OTA Module
+//| """DUALBANK Module
 //|
-//| The `ota` module implements over-the-air update.
+//| The `dualbank` module adds ability to update and switch
+//| between the two app partitions.
 //|
-//| There are two identical ota partitions ota_0/1, these
-//| contain different firmware versions.
+//| There are two identical partitions, these contain different
+//| firmware versions.
 //| Having two partitions enables rollback functionality.
 //|
 //| The two partitions are defined as boot partition and
-//| next-update partition. Calling `ota.flash()` writes the
-//| next-update partition.
+//| next-update partition. Calling `dualbank.flash()` writes
+//| the next-update partition.
 //|
 //| After the next-update partition is written a validation
 //| check is performed and on a successful validation this
@@ -47,81 +48,68 @@
 //|
 //| .. code-block:: python
 //|
-//|     import ota
+//|     import dualbank
 //|
-//|     ota.flash(buffer, offset)
-//|     ota.finish()
+//|     dualbank.flash(buffer, offset)
+//|     dualbank.switch()
 //| """
 //| ...
 //|
 
-//| def switch() -> None:
-//|     """Switches the boot partition. On next reset,
-//|        firmware will be loaded from the partition
-//|        just switched over to."""
-//|     ...
-//|
-STATIC mp_obj_t ota_switch(void) {
-    common_hal_ota_switch();
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_0(ota_switch_obj, ota_switch);
-
-//| def finish() -> None:
-//|     """Validates flashed firmware, sets next boot partition.
-//|         **Must be called** after the firmware has been
-//|         completely written into the flash using `ota.flash()`.
-//|
-//|         This is to be called only once per update."""
-//|     ...
-//|
-STATIC mp_obj_t ota_finish(void) {
-    common_hal_ota_finish();
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_0(ota_finish_obj, ota_finish);
-
 //| def flash(*buffer: ReadableBuffer, offset: int=0) -> None:
-//|     """Writes one of two OTA partitions at the given offset.
-//|
-//|     The default offset is 0. It is necessary to provide the
-//|     offset when writing in discontinous chunks.
+//|     """Writes one of two app partitions at the given offset.
 //|
 //|     This can be called multiple times when flashing the firmware
-//|     in small chunks."""
+//|     in small chunks.
+//|     """
 //|     ...
 //|
-STATIC mp_obj_t ota_flash(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+STATIC mp_obj_t dualbank_flash(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     enum { ARG_buffer, ARG_offset };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED },
-        { MP_QSTR_offset, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = -1} },
+        { MP_QSTR_offset, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 0} },
     };
 
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    if (args[ARG_offset].u_int < -1) {
+    if (args[ARG_offset].u_int < 0) {
         mp_raise_ValueError(translate("offset must be >= 0"));
     }
 
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
 
-    common_hal_ota_flash(bufinfo.buf, bufinfo.len, args[ARG_offset].u_int);
+    common_hal_dualbank_flash(bufinfo.buf, bufinfo.len, args[ARG_offset].u_int);
     return mp_const_none;
 }
-STATIC MP_DEFINE_CONST_FUN_OBJ_KW(ota_flash_obj, 0, ota_flash);
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(dualbank_flash_obj, 0, dualbank_flash);
 
-STATIC const mp_rom_map_elem_t ota_module_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ota) },
-    { MP_ROM_QSTR(MP_QSTR_switch), MP_ROM_PTR(&ota_switch_obj) },
-    { MP_ROM_QSTR(MP_QSTR_finish), MP_ROM_PTR(&ota_finish_obj) },
-    { MP_ROM_QSTR(MP_QSTR_flash), MP_ROM_PTR(&ota_flash_obj) },
+//| def switch() -> None:
+//|     """Switches the boot partition.
+//|
+//|     On next reset, firmware will be loaded from the partition
+//|     just switched over to.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t dualbank_switch(void) {
+    common_hal_dualbank_switch();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(dualbank_switch_obj, dualbank_switch);
+
+STATIC const mp_rom_map_elem_t dualbank_module_globals_table[] = {
+    // module name
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_dualbank) },
+    // module functions
+    { MP_ROM_QSTR(MP_QSTR_flash), MP_ROM_PTR(&dualbank_flash_obj) },
+    { MP_ROM_QSTR(MP_QSTR_switch), MP_ROM_PTR(&dualbank_switch_obj) },
 };
-STATIC MP_DEFINE_CONST_DICT(ota_module_globals, ota_module_globals_table);
+STATIC MP_DEFINE_CONST_DICT(dualbank_module_globals, dualbank_module_globals_table);
 
-const mp_obj_module_t ota_module = {
+const mp_obj_module_t dualbank_module = {
     .base = { &mp_type_module },
-    .globals = (mp_obj_dict_t*)&ota_module_globals,
+    .globals = (mp_obj_dict_t*)&dualbank_module_globals,
 };
diff --git a/shared-bindings/ota/__init__.h b/shared-bindings/dualbank/__init__.h
similarity index 78%
rename from shared-bindings/ota/__init__.h
rename to shared-bindings/dualbank/__init__.h
index 82273f975a..7edbc6d68a 100644
--- a/shared-bindings/ota/__init__.h
+++ b/shared-bindings/dualbank/__init__.h
@@ -24,13 +24,12 @@
  * THE SOFTWARE.
  */
 
-#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_OTA___INIT___H
-#define MICROPY_INCLUDED_SHARED_BINDINGS_OTA___INIT___H
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H
 
 #include "py/runtime.h"
 
-extern void common_hal_ota_switch(void);
-extern void common_hal_ota_finish(void);
-extern void common_hal_ota_flash(const void *buf, const size_t len, const int32_t offset);
+extern void common_hal_dualbank_switch(void);
+extern void common_hal_dualbank_flash(const void *buf, const size_t len, const size_t offset);
 
-#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_OTA___INIT___H
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H