DOIT ESP32 DEVKIT V1 Development Board

Code name: ESP32_DEV

DOIT ESP32 DEVKIT V1 development board is based on esp32 microcontroller and uses xtensa architecture. This board has a maximum CPU frequency of 240 MHz and a flash size of 4MB.

⚡ Tech Specs 📌 Pinout 🔗 Useful Links 🗺️ Mappings 🛠️ Tools

About DOIT ESP32 DEVKIT V1

The DOIT ESP32 DEVKIT V1 is a versatile development board built around the proven Espressif ESP32-WROOM-32 module. It packs dual-core processing power, Wi-Fi 802.11 b/g/n and Bluetooth 4.2 (BR/EDR + BLE) into a slim, breadboard-friendly 30-pin package-perfect for rapid IoT prototyping. 📡

An on-board CP2102 USB-to-UART converter and auto-reset circuitry let you plug in, program, and debug over Micro-USB with zero fuss. 🔌

Power options are flexible: feed the board via VIN (5 V), the Micro-USB port, or tap the regulated 3V3 rail for low-power projects. A high-efficiency LDO keeps everything stable. ⚡️

Development conveniences include a dedicated EN (reset) button 🔁 and a BOOT (IO0) button for easy firmware flashing and download-mode entry. 🚀

With rich peripherals-ADC, DAC, PWM, capacitive-touch, I²C, SPI, UART and more-the DOIT ESP32 DEVKIT V1 is ready to drive sensors, displays, motors, or anything your next connected gadget requires. ⚙️

Where to Buy DOIT ESP32 DEVKIT V1

Starting from

5$ per unit

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DOIT ESP32 DEVKIT V1 Technical Specifications

🔌 USB

Type Micro-USB

Serial Chip CP2102

🛰️ 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

40 digital IO pins
16 external interrupt pins
16 analog input pins
19 PWM pins

View Full Datasheet

DOIT ESP32 DEVKIT V1 Dimensions

Width 23.37 mm

Length 51.45 mm

DOIT ESP32 DEVKIT V1 Pinout

The DOIT ESP32 DEVKIT V1 pinout exposes nearly the entire feature set of the ESP32 on two easy-to-breadboard rows of 15 pins each.

Power rails include VIN (5 V) for USB or external input, a regulated 3V3 output, and several GND pins for solid reference.

Serial I/O: TX0 (GPIO1) and RX0 (GPIO3) link to the CP2102 for USB programming, while TX2 (GPIO17) and RX2 (GPIO16) give you a second hardware UART for sensors or GPS modules.

I²C defaults to SDA (GPIO21) and SCL (GPIO22), but any open GPIO can be reassigned in software.

SPI comes in two flavors: the default VSPI bus (MOSI GPIO23, MISO GPIO19, SCK GPIO18, CS GPIO5) and an alternate HSPI bus on GPIO12–GPIO15 for additional devices.

Analog & touch: Eight ADC1 channels reside on GPIO32–GPIO39, usable even when Wi-Fi is active. Extra ADC2 channels (e.g., GPIO0, 2, 4, 12–15, 25–27) are shared with Wi-Fi. Dual 8-bit DAC outputs sit on GPIO25 and GPIO26. Many of these pads double as capacitive-touch sensors for sleek, button-free interfaces.

Every GPIO can source PWM signals for LED dimming or motor control. Keep an eye on boot-strap pins-GPIO0, GPIO2, and GPIO15-which must be held in the correct state (usually HIGH) during reset for normal startup.

From robust power handling to multiple high-speed buses, the DOIT ESP32 DEVKIT V1 pinout gives makers and professionals alike the flexibility to build anything from simple sensor nodes to fully fledged connected products-all on a compact, breadboard-friendly board.

✅ Safe Pins to Use

For general GPIO usage, these are the safest and most flexible choices:

🔹 IO18

🔹 IO19

🔹 IO21

🔹 IO22

🔹 IO23

🔹 IO25

🔹 IO26

🔹 IO27

🔹 IO32

🔹 IO33

Why Are These Pins Safe?

Not involved in bootstrapping → No impact on device boot mode or system startup
Not linked to flash memory or PSRAM → Won't interfere with storage or memory access
Not dedicated to USB or JTAG → Free for general use without affecting debugging
No special hardware connections → Freely assignable without internal conflicts

⚠️ Pins to Avoid or Use with Caution

Some pins are reserved for critical functions like bootstrapping, JTAG debugging, USB communication, and flash memory operations. Misusing these pins may lead to boot failures, programming issues, USB conflicts, or disruptions in flash storage.

Critical Pin Categories:

🛠️ Strapping Pins: Control boot behavior and flash voltage selection
🔗 JTAG Debugging Pins: Required for low-level debugging
🔌 USB Communication Pins: Used for USB Serial/JTAG communication
⚡ Flash Memory & SPI Pins: Connected to SPI flash memory and PSRAM
📡 UART Serial Communication Pins: Used for debugging and firmware uploads

PIN	Label	Reason	Function
IO1	U0TXD (GPIO1)	Connected to on-board USB-UART for uploading and logs; drives serial output at boot, so using as GPIO can disrupt programming or console.	🔌 USB
IO2	GPIO2	If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure.	🛠️ Strapping
IO3	U0RXD (GPIO3)	Used for receiving data from USB-UART (programming); also pulled HIGH at boot for console communication, so using as GPIO can disrupt uploads.	🔌 USB
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

DOIT ESP32 DEVKIT V1 Useful Links

🔗 Datasheet

https://www.javanelec.com/stfiles/getappdocument/1/true/f94d9c02-935a-4075-8484-f57aec67dcc0.pdf

🔗 ESP32 Datasheet

https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf

🔗 KiCad

https://github.com/tyme2tb/doit-esp32-devkit-v1/tree/main/kicad

🔗 Schematic

https://embedded-systems-design.github.io/overview-of-the-esp32-devkit-doit-v1/SchematicsforESP32.pdf

DOIT ESP32 DEVKIT V1 Pin Mappings

This development board provides 40 digital IO pins, out of which 16 can be used as external interrupt pins , 16 as analog input pins and 19 pins have Pulse-Width Modulation (PWM) .

Pin	Function	ESP Pin	Input/Output	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	IO1	GPIO1	BIDIRECTIONAL	GPIO
6	IO2	GPIO2	BIDIRECTIONAL	GPIO, ADC
7	IO3	GPIO3	BIDIRECTIONAL	GPIO
8	IO4	GPIO4	BIDIRECTIONAL	GPIO, ADC
9	IO5	GPIO5	BIDIRECTIONAL	GPIO
10	IO12	GPIO12	BIDIRECTIONAL	GPIO, ADC
11	IO13	GPIO13	BIDIRECTIONAL	GPIO, ADC
12	IO14	GPIO14	BIDIRECTIONAL	GPIO, ADC
13	IO15	GPIO15	BIDIRECTIONAL	GPIO, ADC
14	IO16	GPIO16	BIDIRECTIONAL	GPIO
15	IO17	GPIO17	BIDIRECTIONAL	GPIO
16	IO18	GPIO18	BIDIRECTIONAL	GPIO
17	IO19	GPIO19	BIDIRECTIONAL	GPIO
18	IO21	GPIO21	BIDIRECTIONAL	GPIO
19	IO22	GPIO22	BIDIRECTIONAL	GPIO
20	IO23	GPIO23	BIDIRECTIONAL	GPIO
21	IO25	GPIO25	BIDIRECTIONAL	GPIO, ADC
22	IO26	GPIO26	BIDIRECTIONAL	GPIO, ADC
23	IO27	GPIO27	BIDIRECTIONAL	GPIO, ADC
24	IO32	GPIO32	BIDIRECTIONAL	GPIO, ADC
25	IO33	GPIO33	BIDIRECTIONAL	GPIO, ADC
26	IO34	GPIO34	INPUT	GPIO, ADC
27	IO35	GPIO35	INPUT	GPIO, ADC
28	IO36	GPIO36	INPUT	GPIO, ADC
29	IO39	GPIO39	INPUT	GPIO, ADC

Function Pin Function

ESP Pin Pin on ESP32

I/O Input/Output Pin

Description Pin Description

DOIT ESP32 DEVKIT V1 Pins Mapping Arduino IDE

Below you can find the DOIT ESP32 DEVKIT V1 pinout. This development board provides 40 digital IO pins, out of which 16 can be used as external interrupt pins, 16 as analog input pins and 19 pins have Pulse-Width Modulation (PWM).

Pin	Analog	Touch	PWM	Other
0	A11	T1
1			PWM	TX
2	A12	T2	PWM	LED_BUILTIN
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	MISO
21			PWM	SDA
22			PWM	SCL
23			PWM	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

Analog Analog input pins

Touch Touch pins

Function Function pins

RX / TX Receive/Transmit

LED_BUILTIN Built-in LED

PWM Pulse-Width Modulation

Default Tools for DOIT ESP32 DEVKIT V1

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 B)
Maximum data size	320 Kb (327680 B)

The DOIT ESP32 DEVKIT V1 development board by default uses esptool_py uploader tool, esp_ota network uploader tool for Over-the-air (OTA) uploads and esptool_py bootloader tool. The bootloader starts at address "0x1000". Flash mode and boot mode for DOIT ESP32 DEVKIT V1 development board by default is dio and dio respectively.