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Add ESP.getChipId() function to get ESP32's ChipID. #322

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Merged
merged 2 commits into from
May 5, 2017
Merged

Add ESP.getChipId() function to get ESP32's ChipID. #322

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512b98b
Add ESP.getChipId() function to get ESP32's ChipID.
wemos Apr 21, 2017
80e612d
change getChipId() to getEfuseMac()
wemos May 2, 2017
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8 changes: 8 additions & 0 deletions cores/esp32/Esp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -212,3 +212,11 @@ bool EspClass::flashRead(uint32_t offset, uint32_t *data, size_t size)
{
return spi_flash_read(offset, (uint32_t*) data, size) == ESP_OK;
}


uint64_t EspClass::getChipId(void)
{
uint64_t _chipid;
esp_efuse_read_mac((uint8_t*) (&_chipid));
return _chipid;
}
2 changes: 2 additions & 0 deletions cores/esp32/Esp.h
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Expand Up @@ -76,6 +76,8 @@ class EspClass
bool flashWrite(uint32_t offset, uint32_t *data, size_t size);
bool flashRead(uint32_t offset, uint32_t *data, size_t size);

uint64_t getChipId();
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I would like you to rename the method to getEfuseMac() because the name is misleading :) I get that ESP8266 has this method and that the result could be interpreted as unique id of the chip, but still this is not the chip id that ESP8266 have.


};

extern EspClass ESP;
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14 changes: 14 additions & 0 deletions libraries/ESP32/examples/ChipID/GetChipID/GetChipID.ino
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@@ -0,0 +1,14 @@
uint64_t chipid;

void setup() {
Serial.begin(115200);
}

void loop() {
chipid=ESP.getChipId();//The chip ID is essentially its MAC address(length: 6 bytes).
Serial.printf("ESP32 Chip ID = %04X",(uint16_t)(chipid>>32));//print High 2 bytes
Serial.printf("%08X\n",(uint32_t)chipid);//print Low 4bytes.

delay(3000);

}