diff --git a/ports/esp32/esponewire.c b/ports/esp32/esponewire.c
deleted file mode 100644
index 781616cbe..000000000
--- a/ports/esp32/esponewire.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2015-2017 Damien P. George
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "py/mphal.h"
-#include "esp8266/esponewire.h"
-
-#define TIMING_RESET1 (0)
-#define TIMING_RESET2 (1)
-#define TIMING_RESET3 (2)
-#define TIMING_READ1 (3)
-#define TIMING_READ2 (4)
-#define TIMING_READ3 (5)
-#define TIMING_WRITE1 (6)
-#define TIMING_WRITE2 (7)
-#define TIMING_WRITE3 (8)
-
-uint16_t esp_onewire_timings[9] = {480, 40, 420, 5, 5, 40, 10, 50, 10};
-
-#define DELAY_US mp_hal_delay_us_fast
-
-int esp_onewire_reset(mp_hal_pin_obj_t pin) {
-    mp_hal_pin_write(pin, 0);
-    DELAY_US(esp_onewire_timings[TIMING_RESET1]);
-    uint32_t i = MICROPY_BEGIN_ATOMIC_SECTION();
-    mp_hal_pin_write(pin, 1);
-    DELAY_US(esp_onewire_timings[TIMING_RESET2]);
-    int status = !mp_hal_pin_read(pin);
-    MICROPY_END_ATOMIC_SECTION(i);
-    DELAY_US(esp_onewire_timings[TIMING_RESET3]);
-    return status;
-}
-
-int esp_onewire_readbit(mp_hal_pin_obj_t pin) {
-    mp_hal_pin_write(pin, 1);
-    uint32_t i = MICROPY_BEGIN_ATOMIC_SECTION();
-    mp_hal_pin_write(pin, 0);
-    DELAY_US(esp_onewire_timings[TIMING_READ1]);
-    mp_hal_pin_write(pin, 1);
-    DELAY_US(esp_onewire_timings[TIMING_READ2]);
-    int value = mp_hal_pin_read(pin);
-    MICROPY_END_ATOMIC_SECTION(i);
-    DELAY_US(esp_onewire_timings[TIMING_READ3]);
-    return value;
-}
-
-void esp_onewire_writebit(mp_hal_pin_obj_t pin, int value) {
-    uint32_t i = MICROPY_BEGIN_ATOMIC_SECTION();
-    mp_hal_pin_write(pin, 0);
-    DELAY_US(esp_onewire_timings[TIMING_WRITE1]);
-    if (value) {
-        mp_hal_pin_write(pin, 1);
-    }
-    DELAY_US(esp_onewire_timings[TIMING_WRITE2]);
-    mp_hal_pin_write(pin, 1);
-    DELAY_US(esp_onewire_timings[TIMING_WRITE3]);
-    MICROPY_END_ATOMIC_SECTION(i);
-}