ESP32 Lite V1.0.0

Development Board

Code name: LOLIN32_LITE

ESP32 Lite V1.0.0 is a development board based on the ESP32 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.

About ESP32 Lite V1.0.0

The ESP32 Lite V1.0.0 is a compact generic ESP32 development board based on the ESP32-WROOM-32 module, offering a slim form factor similar to the LOLIN32 Lite. It features 4 MB of flash, runs up to 240 MHz, and provides Wi-Fi 802.11 b/g/n and Bluetooth 4.2 (BR/EDR + BLE) for wireless connectivity. 📡

Equipped with a CH340G USB-to-UART bridge, it supports programming and serial debugging via Micro-USB or Type-C ports, with auto-reset/boot functionality for easy flashing. :contentReference

This board is compatible with MicroPython and the Arduino IDE, making it versatile for various IoT projects. It includes 22 GPIOs with PWM support, 12-bit ADCs, dual 8-bit DACs, capacitive-touch pads, and interfaces for I²C, SPI, UART, SD-card, and RTC IO. ⚙️

Convenience features include RESET and BOOT buttons, and it's ideal for compact, battery-powered applications. ⚡️

Where to Buy ESP32 Lite V1.0.0

Starting from

Amazon.com Ships worldwide

View Price

Amazon.de Ships to EU

View Price

AliExpress Best value

View Price

Prices are subject to change. We earn from qualifying purchases as an Amazon Associate.

📋 Technical Specifications

Complete technical specification details for ESP32 Lite V1.0.0

🔌 USB

Type Micro-USB / Type-C

Serial Chip CH340G

🛰️ Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 4.2

BLE 4.2

🧠 Microcontroller

Model esp32

Clock Speed 240 MHz

Flash Size 4MB

Architecture xtensa

✨ Features & Pins

Digital IO 40

Analog Input 16

PWM 18

Interrupts 16

ESP32 Lite V1.0.0 Board Dimensions

Physical measurements for ESP32 Lite V1.0.0

ESP32 Lite V1.0.0 dimensions - height, width

Width 25.4mm

Length 58mm

Pin Gap 2.54mm

ESP32 Lite V1.0.0 Pinout Diagram

Complete pin reference for ESP32 Lite V1.0.0

The ESP32 Lite V1.0.0 pinout mirrors the LOLIN32 Lite, with 26 ESP32 GPIOs on two rows for shield compatibility.

Power rails: USB 5V or VIN as input, regulated 3V3 for peripherals, and GND for returns.

Serial: U0_TX (GPIO1) and U0_RX (GPIO3) for programming. Additional UART on GPIO17/16.

I²C: Default SDA (GPIO21) and SCL (GPIO22).

SPI: VSPI on GPIO23/19/18/5, HSPI on GPIO12-15.

Analog & touch: ADC1 on GPIO32-39, ADC2 shared, DAC on GPIO25/26, capacitive touch available.

All GPIOs support PWM. Boot-strap pins GPIO0/2/15 must be HIGH on reset.

✅ Safe Pins to Use

These pins are safe for general GPIO usage without boot or system conflicts

IO18

IO19

IO22

IO23

IO25

IO26

IO27

IO32

IO33

💡 Why Are These Pins Safe?

✓ No boot sequence involvement

✓ No flash/PSRAM connections

✓ No USB or JTAG conflicts

✓ Freely assignable without issues

⚠️ Pins to Avoid or Use with Caution

Reserved for critical functions. Misuse may cause boot failures, programming issues, or system conflicts.

🔄 Strapping Pins

Boot behavior & flash voltage

🐛 JTAG Debugging

Low-level debugging interface

🔌 USB Pins

USB Serial/JTAG communication

💾 Flash/SPI Pins

Memory & PSRAM connections

📡 UART Serial

Debugging & firmware uploads

PIN	Label	Why Avoid	Type
IO0	GPIO0	Must be HIGH during boot for normal startup; if held LOW on reset, forces flash programming mode.	🛠️ Strapping
IO2	GPIO2	If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure.	🛠️ Strapping
IO4	GPIO4	Sampled at reset for boot config; should not be driven at boot (affects boot mode timing).	🛠️ Strapping
IO5	GPIO5	Must be HIGH during boot; if pulled LOW at reset, alters SDIO slave timing and may prevent normal boot.	🛠️ Strapping
IO12	MTDI (GPIO12)	Keep LOW during boot (internal PD); pulling HIGH at reset selects 1.8V flash mode, causing flash brownout if 3.3V flash is used.	🛠️ Strapping
IO13	MTCK (GPIO13)	Used for JTAG debugging (TCK); avoid using as GPIO if JTAG is needed.	🪛 Other
IO14	MTMS (GPIO14)	Used for JTAG debugging (TMS); driving it as GPIO may interfere with JTAG or produce spurious signals at boot.	🪛 Other
IO15	MTDO (GPIO15)	Keep HIGH during boot (internal PU); if LOW on reset, bootloader log is silenced and boot mode may change.	🛠️ Strapping
IO16	GPIO16	Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules.	⚡ Flash
IO17	GPIO17	Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules.	⚡ Flash
IO34	GPIO34	Cannot be used as output (no drive capability); only suitable for analog/digital input.	🪛 Other
IO35	GPIO35	Cannot be used as output; only suitable for input.	🪛 Other
IO36	GPIO36 (SENSOR_VP)	Cannot be used as output; only suitable for input (e.g., analog read).	🪛 Other
IO39	GPIO39 (SENSOR_VN)	Cannot be used as output; only suitable for input.	🪛 Other

Useful Links

Datasheets and resources for ESP32 Lite V1.0.0

ESP32 Datasheet

Microcontroller reference

ESP32 Lite V1.0.0 Custom Pin Mapping

Pin configuration and GPIO mapping for ESP32 Lite V1.0.0

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Function	ESP Pin	I/O Type	Description
1	5V	5V	POWER INPUT	5V power input for the board
2	GND	GND	POWER GROUNT	Ground connection
3	3V3	3.3V	POWER OUTPUT	3.3V power output
5	IO0	GPIO0	BIDIRECTIONAL	GPIO, ADC
6	IO2	GPIO2	BIDIRECTIONAL	GPIO, ADC
7	IO4	GPIO4	BIDIRECTIONAL	GPIO, ADC
8	IO5	GPIO5	BIDIRECTIONAL	GPIO
9	IO12	GPIO12	BIDIRECTIONAL	GPIO, ADC
10	IO13	GPIO13	BIDIRECTIONAL	GPIO, ADC
11	IO14	GPIO14	BIDIRECTIONAL	GPIO, ADC
12	IO15	GPIO15	BIDIRECTIONAL	GPIO
13	IO16	GPIO16	BIDIRECTIONAL	GPIO
14	IO17	GPIO17	BIDIRECTIONAL	GPIO
15	IO18	GPIO18	BIDIRECTIONAL	GPIO
16	IO19	GPIO19	BIDIRECTIONAL	GPIO
17	IO22	GPIO22	BIDIRECTIONAL	GPIO
18	IO23	GPIO23	BIDIRECTIONAL	GPIO
19	IO25	GPIO25	BIDIRECTIONAL	GPIO, ADC
20	IO26	GPIO26	BIDIRECTIONAL	GPIO, ADC
21	IO27	GPIO27	BIDIRECTIONAL	GPIO, ADC
22	IO32	GPIO32	BIDIRECTIONAL	GPIO, ADC
23	IO33	GPIO33	BIDIRECTIONAL	GPIO, ADC
24	IO34	GPIO34	BIDIRECTIONAL	GPIO, ADC
25	IO35	GPIO35	BIDIRECTIONAL	GPIO, ADC
26	IO36	GPIO36	BIDIRECTIONAL	GPIO, ADC
27	IO39	GPIO39	BIDIRECTIONAL	GPIO, ADC

Legend

Function Pin role

GPIO ESP32 pin

I/O Direction

# Pin number

Pin Mappings

Complete pinout and GPIO mapping for ESP32 Lite V1.0.0

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
0	A11	T1
1			PWM	TX
2	A12	T2	PWM
3			PWM	RX
4	A10	T0	PWM
5			PWM	SS
12	A15	T5	PWM
13	A14	T4	PWM
14	A16	T6	PWM
15	A13	T3	PWM
18			PWM	SCK
19			PWM	SDA MISO
22			PWM	LED_BUILTIN
23			PWM	SCL MOSI
25	A18		PWM	DAC1
26	A19		PWM	DAC2
27	A17	T7	PWM
32	A4	T9	PWM
33	A5	T8	PWM
34	A6
35	A7
36	A0
39	A3

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for ESP32 Lite V1.0.0

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	dio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)