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4. USAGE
Your NodeMCU ESP32 is now ready to use. Simply connect it with an USB
cable to your computer.
The installed libraries provide many examples to gain you some insight into
the module.
These examples can be found in your Ardunio IDE in File
→
Example
→
ESP32.
The fastest and easiest way to test your NodeMCU ESP is the recall of device
number. Copy the following code or use the code example GetChipID from
the Arduino IDE:
uint64_t
chipid;
void
setup
() {
Serial.begin(
115200
);
}
void
loop
() {
chipid=ESP.getEfuseMac();
//The chip ID is essentially its MAC address(length:6bytes)
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
);
}
To upload, click on the upload button from the Arduino IDE and hold down
the BOOT button on the SBC NodeMCU ESP32. The upload is completed until
the writing has reached 100% and you willbe asked to reboot (hard reset
viaRTS pin
…)
with the EN key.
You can see the output of the test on the serial monitor.
