ESP32-PICOD4 custom board flashing

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kowshik1729

Joined May 10, 2020
14
Hello all,

I recently got a custom PCB made with ESP32-PICO-D4 as the MCU. I only have the following pins exposed outside for connecting wires

Rx, Tx, VCC, GND, IO 0(GPIO zero), and EN pins. I wanna know

1.) whether the bare IC's come with any bootloader in them such that I can directly flash programs into them using esptool?
2.) What lines do I need if I have to flash files using esp tool?
3.) What lines do I need if I need to burn the Arduino's bootloader into it?

Please let me know what should I do for performing above tasks. Thanks in advance.
 
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