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@@ -164,7 +164,20 @@ esp_err_t esp_read_mac(uint8_t* mac, esp_mac_type_t type)
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case ESP_MAC_WIFI_SOFTAP:
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#if CONFIG_ESP_MAC_ADDR_UNIVERSE_WIFI_AP
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memcpy(mac, efuse_mac, 6);
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+ // as a result of some esp32s2 chips burned with one MAC address by mistake,
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+ // there are some MAC address are reserved for this bug fix.
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+ // related mistake MAC address is 0x7cdfa1003000~0x7cdfa1005fff,
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+ // reserved MAC address is 0x7cdfa1020000~0x7cdfa1022fff (MAC address + 0x1d000).
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+#ifdef CONFIG_IDF_TARGET_ESP32S2
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+ uint8_t mac_begin[6] = { 0x7c, 0xdf, 0xa1, 0x00, 0x30, 0x00 };
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+ uint8_t mac_end[6] = { 0x7c, 0xdf, 0xa1, 0x00, 0x5f, 0xff };
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+ if(memcmp(mac,mac_begin,6) >= 0 && memcmp(mac_end,mac,6) >=0 ){
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+ mac[3] += 0x02; // contain carry bit
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+ mac[4] += 0xd0;
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+ }
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+#else
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mac[5] += 1;
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+#endif // IDF_TARGET_ESP32S2
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#else
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esp_derive_local_mac(mac, efuse_mac);
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#endif
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ChenJianxing