ESP32 Project Verification Summary

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Verified the ESP32 part project as ESP32-WROOM-32E / ESP32-WROOM-32E-N4.
Overall result
The core part model looks mostly correct: symbol pin names/numbers match the Espressif datasheet for pins 1–38, and the extra pin/pad 39 is consistent with Espressif’s P_GND / exposed ground pad convention. The footprint appears broadly consistent with the official land pattern: 1.27 mm pitch, 18 × 25.5 mm module size, castellated edge pads, and additional ground pad geometry.
Issues found
  1. Structured metadata is incomplete
    • Missing or not exposed as structured properties:
      • Manufacturer: Espressif
      • MPN: ESP32-WROOM-32E-N4
      • Correct LCSC number appears to be C701341 from LCSC search, while project documentation mentions C2973652 — this needs correction/confirmation.
      • JLCPCB part class
      • Package/module size: 18.0 × 25.5 × 3.1 mm
      • Pin count / terminal count note
  2. Pin 39 needs clearer documentation
    • Datasheet table describes 38 pins, but Espressif reference material also shows P_GND / pad 39.
    • The part should explicitly document pin 39 as P_GND / exposed optional soldered ground pad, not just generic GND.
  3. Footprint pads are signal-named
    • The footprint data appears to use signal names like IO0, 3V3, EN, GND rather than numeric pad labels.
    • That is acceptable if the symbol-to-footprint mapping is correct, but numeric pad mapping should be documented to avoid future library ambiguity.
  4. Terminal metadata is improved but still mixed
    • Many pins now have reasonable pin types and descriptions.
    • Some terminal-level metadata still appears generic/unspecified, so automated review quality may be weaker than it should be.
  5. Antenna keepout needs visual verification
    • A zone/keepout-like rectangle exists near the antenna area, but its intent is under-documented.
    • Before production use, verify it matches Espressif’s antenna keepout guidance and that no copper, vias, or components intrude into the antenna region.
  6. Automated review unavailable
    • The review system returned “Project not found” / no review categories, so this verification is based on direct project search plus datasheet comparison, not a clean ERC/DRC pass.
Recommended fixes
  • Add structured properties for manufacturer, MPN, LCSC number, JLCPCB class, datasheet URL, module size, and pin count.
  • Resolve the LCSC discrepancy: project doc says C2973652, but LCSC search shows ESP32-WROOM-32E-N4 = C701341.
  • Rename or describe pin 39 as P_GND / exposed ground pad.
  • Add or improve terminal metadata for all pins: electrical type, alternate functions, strapping notes, NC notes, and input-only GPIO notes.
  • Document the footprint mapping clearly: datasheet pin number → symbol pin → footprint pad.
  • Verify and document the antenna keepout geometry against the Espressif recommended land pattern before using this part in a production PCB.
Fix metadata issues
Document pad mapping
Verify antenna keepout
Improve terminal metadata
Run full review
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IO33
RXD0
IO18
IO23
GND
3V3
GND
IO32
IO19
SENSOR_VN
IO22
IO35
NC
SENSOR_VP
IO34
TXD0
EN
GND
IO21
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ESP32-WROOM-32E

ESP32-WROOM-32E thumbnail
ESP32-WROOM-32E is a powerful, general-purpose Wi-Fi and Bluetooth MCU module from Espressif Systems. It is built around the ESP32 SoC and integrates a dual-core processor, wireless connectivity, flash memory, and numerous peripherals in a compact module suitable for IoT, industrial control, smart home, wearable, and wireless communication applications. KB ROM
520 KB SRAM 16 KB RTC SRAM for low-power operation - Integrated PCB antenna on the WROOM-32E version Optional 8 MB and 16 MB flash variants available on request Converter) TWAI® (CAN-compatible interface) T applications CE-RED SRRC Bluetooth BQB RoHS and REACH compliant devices Smart lighting systems Remote control and automation equipment 4 MB flash memory, extensive peripheral interfaces, and low-power operation in a compact package. Its strong wireless capabilities and rich I/O make it one of the most widely used modules for IoT and embedded system development. #Module #Esp32

Properties

ESPRESSIF(乐鑫)

U

ESP32-WROOM-32E

C2973652

WIFI-SMD_ESP32-WROOM-32E-A

WiFi Modules

Extended Part

espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf

parametric-v1

creativecommons.org/licenses/by/4.0/

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