ESP32 LCSC Part Validation

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Verified the ESP32 LCSC part project as ESP32-WROOM-32UE-N16 / LCSC C701346 against the available Espressif/LCSC metadata.
Issues found:
  1. Symbol has suspicious extra GND pin 39
    • Datasheet pin table is a 38-pin module.
    • Project symbol includes GND pin 39, likely intended to represent the center/thermal ground land array.
    • Recommended fix: do not present it as a normal datasheet pin unless the part model explicitly documents it as an exposed/ground pad group. Label it clearly as exposed/center GND land or remove it from the user-facing pin table.
  2. Terminal electrical metadata is too weak
    • All terminals appear to have Pin Type: Unspecified / Terminal Type: unspecified.
    • This affects 3V3, GND, EN, GPIOs, analog/input-only pins, UART pins, and NC pins.
    • Recommended fix: classify pins properly:
      • 3V3: power input
      • GND: ground/passive
      • EN: input/control
      • SENSOR_VP, SENSOR_VN, IO34, IO35: input-only / analog-capable
      • GPIOs: bidirectional
      • NC: no-connect
  3. NC pins are not formally encoded as no-connect
    • Pins 17–22 and 32 are named/grouped as NC, but metadata still appears unspecified.
    • Recommended fix: mark them as true no-connect terminals so ERC/part review handles them correctly.
  4. Footprint pad mapping is mostly consistent, but ambiguous
    • The perimeter pads match the ESP32-WROOM-32UE pin order and land pattern style.
    • However, repeated pad names like GND and NC make mapping ambiguous without explicit pad numbers.
    • Recommended fix: ensure footprint pads carry unique pin-number mapping internally, especially for GND pins 1/15/38, NC pins 17–22/32, and center GND lands.
  5. Footprint/documentation formatting issue
    • One GND pad position appears as -8.75 8.88 while others include mm.
    • Recommended fix: normalize coordinate/unit formatting to -8.75mm 8.88mm.
  6. Key metadata is partially missing
    • LCSC number and datasheet URL are present.
    • Manufacturer/MPN appear inferred rather than clearly set as explicit project properties.
    • Recommended fix: explicitly set:
      • Manufacturer: Espressif
      • MPN: ESP32-WROOM-32UE-N16
      • LCSC: C701346
      • Package/footprint: WIFI-SMD_ESP32-WROOM-32UE
      • Operating voltage: 3.0–3.6 V, nominal 3.3 V
      • Temperature: -40°C to +85°C
Overall: the part identity and main pin/footprint geometry look broadly correct, but the symbol/terminal metadata needs cleanup before this is a high-quality reusable library part.
Fix part metadata
Run part review
Check footprint geometry
Document verification
Prepare reusable component
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ESP32-WROOM-32UE-N16

ESP32-WROOM-32UE-N16 thumbnail
2.4GHz -98dBm SMD,19.2x18mm RF Transceiver Modules and Modems RoHS The ESP32-WROOM-32UE-N16 is a 2.4 GHz wireless MCU module built around the ESP32 SoC. It combines a dual-core processor, integrated Wi-Fi (802.11 b/g/n) and Bluetooth 4.2 (Classic + BLE), along with rich peripherals.
The “UE” variant specifically uses a U.FL / IPEX connector for an external antenna, making it ideal for applications that require better RF performance or flexible antenna placement (e.g., enclosed products or long-range communication).
The “N16” indicates 16 MB external flash memory, suitable for large firmware, OTA updates, and data-heavy applications. Processing Dual-core Xtensa LX6 32-bit CPU Clock speed up to 240 MHz Memory 16 MB Flash (N16 variant) ~520 KB SRAM + 448 KB ROM Connectivity Wi-Fi: 802.11 b/g/n (up to 150 Mbps) Bluetooth: v4.2 (BR/EDR + BLE) Frequency: 2.4 GHz band Antenna External antenna via U.FL connector Better range and flexibility vs PCB antenna Interfaces / Peripherals GPIO (≈26 usable pins) UART, SPI, I2C, I2S, SDIO ADC, DAC PWM (LED & motor control) Capacitive touch sensing Security Hardware encryption: AES, SHA, RSA Secure boot & flash encryption support Power Operating voltage: 3.0V – 3.6V (typ. 3.3V) Multiple low-power modes for battery applications Environmental Operating temperature: -40°C to +85°C Physical Surface-mount module (~38 pins / 52 pads depending on reference) Compact and RF-shielded design Typical Applications Smart home devices (IoT) Industrial automation Wireless sensors and data loggers Wearables and consumer electronics Remote monitoring systems #Module #ESP32

Properties

ESPRESSIF(乐鑫)

U

ESP32-WROOM-32UE-N16

C701346

WIFI-SMD_ESP32-WROOM-32UE

Extended Part

Module

lcsc.com/datasheet/C701346.pdf?spm=wm.sxq.inf.ggs___wm.ssy.bg.0.xh&lcsc_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRQFheUFNRR1hXUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D

parametric-v1

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