Part Information Review and Datasheet Update

Set Pin Description to "GPIO VSPI D" on IO23, Set Section to "GPIO" on IO23, and 16 more changes

Set IO23's Pin Description to "GPIO VSPI D"

Set IO23's Section to "GPIO"

Set IO23's Pin Group to "GPIO"

Set IO23's Pin Orientation to "Left"

Set IO23's Sub-symbol Designator Suffix to "GPIO"

Set GND's Pin Type to "Ground"

Set GND's Pin Description to "Ground pin 38"

Set GND's Section to "Ground"

Set GND's Pin Group to "GND_38"

Set GND's Pin Orientation to "Bottom"

Set GND's Sub-symbol Designator Suffix to "Power"

Set GND's Pin Number to "39"

Set GND's Pin Type to "Ground"

Set GND's Pin Description to "Exposed ground pad"

Set GND's Section to "Ground"

Set GND's Pin Group to "P_GND"

Set GND's Pin Orientation to "Bottom"

Set GND's Sub-symbol Designator Suffix to "Power"

Set GND's Pin Type to "Ground"

Set GND's Pin Description to "Ground pin 1"

Set GND's Section to "Ground"

Set GND's Pin Group to "GND_1"

Set GND's Pin Orientation to "Bottom"

Set GND's Sub-symbol Designator Suffix to "Power"

Set GND's Pin Type to "Ground"

Set GND's Pin Description to "Ground pin 15"

Set GND's Section to "Ground"

Set GND's Pin Group to "GND_15"

Set GND's Pin Orientation to "Bottom"

Set GND's Sub-symbol Designator Suffix to "Power"

a day

flux

0:02

Work done

Grouped the ESP32-WROOM-32E pins from the official datasheet into one primary function group per pin: Power/3V3, individual GND groups, Control/Boot, Analog/Touch, Clock/Crystal, GPIO, and Reserved/No Connect.
Updated terminal properties with Section, Pin Group, Pin Orientation, Sub-symbol Designator Suffix, and concise Pin Description; corrected GND pins to Ground type.
Removed duplicate exposed-pad schematic terminals so P_GND/39 is represented once.
Full grouping and validation details are documented in ESP32-WROOM-32E Pin Grouping.

Success criteria review

✅ All datasheet pins 1–38 plus P_GND/39 are covered once.
✅ Power, 3V3, individual GND, GPIO, control/boot, analog/touch, clock/crystal, and reserved pins are distinctly categorized.
✅ Project terminal metadata now reflects the grouping with no duplicate pin assignments.

Next steps

If you want, I can next clean up the remaining visible duplicate-style labels for GND/NC terminals or proceed to footprint/EPAD mapping cleanup.

Clean labels

Clean EPAD mapping

Run ERC check

Export documentation

a day

Refine this doc

Ask about this doc

ESP32-WROOM-32E Pin Grouping

Source: Espressif ESP32-WROOM-32E / ESP32-WROOM-32UE Datasheet v2.0, Table 3 Pin Definitions and Figure 9 Peripheral Schematics.

Grouping rule

Each terminal is assigned to exactly one primary functional group. Pins with multiple capabilities are placed in the most design-critical/common fixed-use group to avoid duplication:

Power: supply pins only.
Ground: each ground pin gets its own Pin Group: GND_1, GND_15, GND_38, P_GND.
Control/Boot: EN and ESP32 boot/strapping/JTAG-related pins.
Analog/Touch: ADC/DAC/touch-capable pins not selected as boot/control or clock/crystal.
Clock/Crystal: 32.768 kHz crystal pins IO32 and IO33.
GPIO: remaining general-purpose digital I/O / communication-capable pins.
Reserved/No Connect: NC pins.

Final one-to-one grouping

Pin #	Terminal	Primary group	Section	Pin Type	Pin Group	Pin Description
1	GND	GND_1	Ground	Ground	GND_1	Ground pin 1
2	3V3	Power	Power	Power In	3V3	3.3V power supply
3	EN	Control/Boot	Control/Boot	Input	Control_Boot	Chip enable input
4	SENSOR_VP	Analog/Touch	Analog/Touch	Input	Analog_Touch	ADC1 channel 0
5	SENSOR_VN	Analog/Touch	Analog/Touch	Input	Analog_Touch	ADC1 channel 3
6	IO34	Analog/Touch	Analog/Touch	Input	Analog_Touch	Input ADC1 channel 6
7	IO35	Analog/Touch	Analog/Touch	Input	Analog_Touch	Input ADC1 channel 7
8	IO32	Clock/Crystal	Clock/Crystal	Bi-Directional	Clock_Crystal	32k crystal input
9	IO33	Clock/Crystal	Clock/Crystal	Bi-Directional	Clock_Crystal	32k crystal output
10	IO25	Analog/Touch	Analog/Touch	Bi-Directional	Analog_Touch	DAC ADC GPIO
11	IO26	Analog/Touch	Analog/Touch	Bi-Directional	Analog_Touch	DAC ADC GPIO
12	IO27	Analog/Touch	Analog/Touch	Bi-Directional	Analog_Touch	ADC touch GPIO
13	IO14	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	JTAG SPI ADC touch
14	IO12	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap MTDI
15	GND	GND_15	Ground	Ground	GND_15	Ground pin 15
16	IO13	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	JTAG SPI ADC touch
17	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_17	No connect
18	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_18	No connect
19	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_19	No connect
20	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_20	No connect
21	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_21	No connect
22	NC	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_22	No connect
23	IO15	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap MTDO
24	IO2	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap GPIO2
25	IO0	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap GPIO0
26	IO4	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap GPIO4
27	IO16	GPIO	GPIO	Bi-Directional	GPIO	GPIO UART2 RX
28	IO17	GPIO	GPIO	Bi-Directional	GPIO	GPIO UART2 TX
29	IO5	Control/Boot	Control/Boot	Bi-Directional	Control_Boot	Boot strap GPIO5
30	IO18	GPIO	GPIO	Bi-Directional	GPIO	GPIO VSPI clock
31	IO19	GPIO	GPIO	Bi-Directional	GPIO	GPIO VSPI Q
32	NC32	Reserved/No Connect	Reserved/No Connect	Not Connected	NC_32	No connect
33	IO21	GPIO	GPIO	Bi-Directional	GPIO	GPIO VSPI HD
34	RXD0	GPIO	GPIO	Bi-Directional	GPIO	GPIO
35	TXD0	GPIO	GPIO	Bi-Directional	GPIO	GPIO
36	IO22	GPIO	GPIO	Bi-Directional	GPIO	GPIO VSPI WP
37	IO23	GPIO	GPIO	Bi-Directional	GPIO	GPIO VSPI D
38	GND	GND_38	Ground	Ground	GND_38	Ground pin 38
39	P_GND	P_GND	Ground	Ground	P_GND	Exposed ground pad

Validation

Datasheet pins 1–38 are present once.
Optional exposed pad P_GND/39 is present once.
Extra split schematic terminals 39_2 through 39_9 were removed to avoid duplicate grouping of the exposed pad.
All remaining terminals have Section, Pin Group, Pin Orientation, and Sub-symbol Designator Suffix set.
Ground terminals are now Pin Type = Ground instead of Power In.

Notes

The visible designators for duplicate GND and NC terminals still include Flux duplicate-instance suffixes in some cases, but the Pin Number and Pin Group metadata are unique and datasheet-derived. The underlying grouping is therefore one-to-one by pin number.

Grouping rule

Final one-to-one grouping

Validation

Notes

Reviews

Documents

ESP32-WROOM-32E Part Information Review

ESP32-WROOM-32E Pin Grouping

Assets

kicad_mod

ESP32-WROOM-32E__16MB_

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ESP32-WROOM-32E__16MB_

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step

ESP32-WROOM-32E__16MB_

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Project Name

ESP32-WROOM-32E (16MB)

Description

The ESP32-WROOM-32E (16MB) is a highly integrated Wi-Fi + Bluetooth + Bluetooth Low Energy (BLE) module developed by Espressif. It is based on the ESP32-D0WD-V3 chip and features a dual-core processor, rich peripherals, and large flash memory—making it ideal for IoT, embedded systems, and wireless applications.

This module is part of the upgraded WROOM-32E series, offering improved RF performance, better stability, and enhanced reliability compared to earlier versions like the 32D.

Key Features (16MB Variant) Processor & Memory Dual-core Xtensa® 32-bit LX6 CPU, up to 240 MHz 520 KB SRAM + 448 KB ROM 16 MB SPI Flash (large storage for firmware/data) Optional variants with PSRAM for memory-intensive tasks Connectivity 2.4 GHz Wi-Fi (802.11 b/g/n) Bluetooth v4.2 (BR/EDR + BLE) Integrated PCB antenna (no external antenna needed) Peripherals & Interfaces Up to 26–38 GPIOs (depending on usage) Supports: UART, SPI, I2C, I2S PWM (LED & motor control) ADC, DAC Capacitive touch sensors SD/SDIO/MMC, CAN (TWAI) Electrical & Physical Operating voltage: 3.0V – 3.6V Operating temperature: –40°C to +85°C (industrial range) Compact size: 18 × 25.5 × 3.1 mm Typical Applications Smart home devices (lighting, appliances) IoT sensors and gateways Industrial automation systems Wearables and smart gadgets Audio/voice processing (thanks to dual-core + large flash)

#module #ESP32 #16MB

Properties

Manufac… Number

ESP32-WROOM-32E__16MB_

Manufac…er Name

Espressif

Part Type

Integrated Circuits

Datasheet URL

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

Designator Prefix

Symbol Style

parametric-v1

Pricing & Availability

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Controls

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adrian95 / ESP32-WROOM-32E (16MB)

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