usb-esp-programmer

Pinout — USB-C ESP Programmer (HC22002)

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Target header (programmer → target):

Signal	Direction	Connect to ESP
GND	—	GND
VCC	out (optional)	3V3 — only if powering the target from the programmer
TX	out	target RX
RX	in	target TX
EN (RST)	out	EN / reset (driven by the auto-reset circuit)
IO0 (BOOT)	out	IO0 / boot strap (driven by the auto-reset circuit)

• Logic level: 3.3 V.
• Cross TX↔RX (programmer TX goes to target RX, and vice-versa).
• A populated header + jumper cap selects the pull-up configuration (pre-set to a sensible default; move it only for non-standard targets).

(Exact header pin order/pitch and electrical limits: see the product page.)

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