Option to ignore CRC for EFuse MAC address (#2399)

* Accept changes as proposed by black.

* Added test and implemented optional correctly.

* Disable PHY RF full calibration (because it calls the breaking MAC retrieval function).

* Disable CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE instead of enable, dummy!

* Rename CONF_IGNORE_EFUSE_MAC_CRC to CONF_ESP32_IGNORE_EFUSE_MAC_CRC.

* Removed unused import.

* Fix ordering of constants.

* Moved all MAC address logic to core helpers.

* Use pretty MAC address for the log.

* Use standard MAC formatter function for debug component.

* Fix clang-formatting.

* Fix clang-formatting.

* Brought wording of comments in line with other function-describing comments.

* Processed code review by @OttoWinter

* Add USE_ESP32_IGNORE_EFUSE_MAC_CRC to defines.h

Co-authored-by: Maurice Makaay <mmakaay1@xs4all.net>

esphome/components/debug/debug_component.cpp

@@ -104,10 +104,7 @@ void DebugComponent::dump_config() {
 
   ESP_LOGD(TAG, "ESP-IDF Version: %s", esp_get_idf_version());
 
-  uint64_t chip_mac = 0LL;
+  ESP_LOGD(TAG, "EFuse MAC: %s", get_mac_address_pretty().c_str());
-  esp_efuse_mac_get_default((uint8_t *) (&chip_mac));
-  std::string mac = uint64_to_string(chip_mac);
-  ESP_LOGD(TAG, "EFuse MAC: %s", mac.c_str());
 
   const char *reset_reason;
   switch (rtc_get_reset_reason(0)) {

esphome/components/esp32/__init__.py

@@ -10,6 +10,8 @@ from esphome.const import (
     CONF_TYPE,
     CONF_VARIANT,
     CONF_VERSION,
+    CONF_ADVANCED,
+    CONF_IGNORE_EFUSE_MAC_CRC,
     KEY_CORE,
     KEY_FRAMEWORK_VERSION,
     KEY_TARGET_FRAMEWORK,
@@ -230,6 +232,11 @@ ESP_IDF_FRAMEWORK_SCHEMA = cv.All(
                 cv.string_strict: cv.string_strict
             },
             cv.Optional(CONF_PLATFORM_VERSION): cv.string_strict,
+            cv.Optional(CONF_ADVANCED, default={}): cv.Schema(
+                {
+                    cv.Optional(CONF_IGNORE_EFUSE_MAC_CRC, default=False): cv.boolean,
+                }
+            ),
         }
     ),
     _esp_idf_check_versions,
@@ -295,6 +302,12 @@ async def to_code(config):
         for name, value in conf[CONF_SDKCONFIG_OPTIONS].items():
             add_idf_sdkconfig_option(name, RawSdkconfigValue(value))
 
+        if conf[CONF_ADVANCED][CONF_IGNORE_EFUSE_MAC_CRC]:
+            cg.add_define("USE_ESP32_IGNORE_EFUSE_MAC_CRC")
+            add_idf_sdkconfig_option(
+                "CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE", False
+            )
+
     elif conf[CONF_TYPE] == FRAMEWORK_ARDUINO:
         cg.add_platformio_option(
             "platform", f"espressif32 @ {conf[CONF_PLATFORM_VERSION]}"

esphome/components/wifi/wifi_component_esp_idf.cpp

@@ -110,6 +110,12 @@ void event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, voi
 }
 
 void WiFiComponent::wifi_pre_setup_() {
+#ifdef USE_ESP32_IGNORE_EFUSE_MAC_CRC
+  uint8_t mac[6];
+  get_mac_address_raw(mac);
+  set_mac_address(mac);
+  ESP_LOGV(TAG, "Use EFuse MAC without checking CRC: %s", get_mac_address_pretty().c_str());
+#endif
   esp_err_t err = esp_netif_init();
   if (err != ERR_OK) {
     ESP_LOGE(TAG, "esp_netif_init failed: %s", esp_err_to_name(err));

esphome/const.py

@@ -42,6 +42,7 @@ CONF_ACTION_ID = "action_id"
 CONF_ACTIVE_POWER = "active_power"
 CONF_ADDRESS = "address"
 CONF_ADDRESSABLE_LIGHT_ID = "addressable_light_id"
+CONF_ADVANCED = "advanced"
 CONF_ALPHA = "alpha"
 CONF_ALTITUDE = "altitude"
 CONF_AND = "and"
@@ -281,6 +282,7 @@ CONF_IDLE_ACTION = "idle_action"
 CONF_IDLE_LEVEL = "idle_level"
 CONF_IDLE_TIME = "idle_time"
 CONF_IF = "if"
+CONF_IGNORE_EFUSE_MAC_CRC = "ignore_efuse_mac_crc"
 CONF_IIR_FILTER = "iir_filter"
 CONF_ILLUMINANCE = "illuminance"
 CONF_IMPEDANCE = "impedance"

esphome/core/defines.h

@@ -50,6 +50,7 @@
 #ifdef USE_ESP32
 #define USE_ESP32_BLE_SERVER
 #define USE_ESP32_CAMERA
+#define USE_ESP32_IGNORE_EFUSE_MAC_CRC
 #define USE_IMPROV
 #define USE_SOCKET_IMPL_BSD_SOCKETS
 

esphome/core/helpers.cpp

@@ -1,4 +1,5 @@
 #include "esphome/core/helpers.h"
+#include "esphome/core/defines.h"
 #include <cstdio>
 #include <algorithm>
 #include <cmath>
@@ -14,6 +15,10 @@
 #include <freertos/FreeRTOS.h>
 #include <freertos/portmacro.h>
 #endif
+#ifdef USE_ESP32_IGNORE_EFUSE_MAC_CRC
+#include "esp_efuse.h"
+#include "esp_efuse_table.h"
+#endif
 
 #include "esphome/core/log.h"
 #include "esphome/core/hal.h"
@@ -22,15 +27,27 @@ namespace esphome {
 
 static const char *const TAG = "helpers";
 
-std::string get_mac_address() {
+void get_mac_address_raw(uint8_t *mac) {
-  char tmp[20];
-  uint8_t mac[6];
 #ifdef USE_ESP32
+#ifdef USE_ESP32_IGNORE_EFUSE_MAC_CRC
+  // On some devices, the MAC address that is burnt into EFuse does not
+  // match the CRC that goes along with it. For those devices, this
+  // work-around reads and uses the MAC address as-is from EFuse,
+  // without doing the CRC check.
+  esp_efuse_read_field_blob(ESP_EFUSE_MAC_FACTORY, mac, 48);
+#else
   esp_efuse_mac_get_default(mac);
 #endif
+#endif
 #ifdef USE_ESP8266
   WiFi.macAddress(mac);
 #endif
+}
+
+std::string get_mac_address() {
+  char tmp[20];
+  uint8_t mac[6];
+  get_mac_address_raw(mac);
   sprintf(tmp, "%02x%02x%02x%02x%02x%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
   return std::string(tmp);
 }
@@ -38,16 +55,15 @@ std::string get_mac_address() {
 std::string get_mac_address_pretty() {
   char tmp[20];
   uint8_t mac[6];
-#ifdef USE_ESP32
+  get_mac_address_raw(mac);
-  esp_efuse_mac_get_default(mac);
-#endif
-#ifdef USE_ESP8266
-  WiFi.macAddress(mac);
-#endif
   sprintf(tmp, "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
   return std::string(tmp);
 }
 
+#ifdef USE_ESP32
+void set_mac_address(uint8_t *mac) { esp_base_mac_addr_set(mac); }
+#endif
+
 std::string generate_hostname(const std::string &base) { return base + std::string("-") + get_mac_address(); }
 
 uint32_t random_uint32() {

esphome/core/helpers.h

@@ -26,11 +26,21 @@ namespace esphome {
 /// The characters that are allowed in a hostname.
 extern const char *const HOSTNAME_CHARACTER_ALLOWLIST;
 
-/// Gets the MAC address as a string, this can be used as way to identify this ESP.
+/// Read the raw MAC address into the provided byte array (6 bytes).
+void get_mac_address_raw(uint8_t *mac);
+
+/// Get the MAC address as a string, using lower case hex notation.
+/// This can be used as way to identify this ESP.
 std::string get_mac_address();
 
+/// Get the MAC address as a string, using colon-separated upper case hex notation.
 std::string get_mac_address_pretty();
 
+#ifdef USE_ESP32
+/// Set the MAC address to use from the provided byte array (6 bytes).
+void set_mac_address(uint8_t *mac);
+#endif
+
 std::string to_string(const std::string &val);
 std::string to_string(int val);
 std::string to_string(long val);                // NOLINT

tests/test5.yaml

@@ -9,6 +9,8 @@ esp32:
   board: nodemcu-32s
   framework:
     type: esp-idf
+    advanced:
+      ignore_efuse_mac_crc: true 
 
 wifi:
   networks: