TTGO T7 V1.3 Mini32

Development Board

Code name: TTGO_T7_V13_Mini32

ESP32 LILYGO

TTGO T7 V1.3 Mini32 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 TTGO T7 V1.3 Mini32

Compact ESP32 dev board with auto-reset and USB - ideal for space-saving Wi-Fi/BLE applications.

📋 Technical Specifications

Complete technical specification details for TTGO T7 V1.3 Mini32

🛰️ 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 19

Interrupts 16

TTGO T7 V1.3 Mini32 Pinout Diagram

Complete pin reference for TTGO T7 V1.3 Mini32

✅ Safe Pins to Use

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

OLED RST

OLED SDA

OLED SCL

SDCard CS

SDCard MOSI

SDCard MISO

SDCard SCLK

LORA MOSI

LORA MISO

LORA SCLK

LORA CS

LORA RST

LORA DIO0

DS3231 SDA

DS3231 SCL

LED_BUILTIN

ADC1_CH0

DAC1

DAC2

💡 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

Useful Links

Datasheets and resources for TTGO T7 V1.3 Mini32

ESP32 Datasheet

Microcontroller reference

TTGO T7 V1.3 Mini32 Custom Pin Mapping

Pin configuration and GPIO mapping for TTGO T7 V1.3 Mini32

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Function	ESP Pin	I/O Type	Description
1	OLED RST	GPIO16	output	OLED Reset
2	OLED SDA	GPIO21	bidirectional	I2C Data Line for OLED
3	OLED SCL	GPIO22	bidirectional	I2C Clock Line for OLED
4	SDCard CS	GPIO5	output	SPI Chip Select for SD Card
5	SDCard MOSI	GPIO23	bidirectional	SPI Master Out Slave In for SD Card
6	SDCard MISO	GPIO19	bidirectional	SPI Master In Slave Out for SD Card
7	SDCard SCLK	GPIO18	bidirectional	SPI Clock Line for SD Card
8	LORA MOSI	GPIO27	bidirectional	SPI Master Out Slave In for LoRa
9	LORA MISO	GPIO19	bidirectional	SPI Master In Slave Out for LoRa
10	LORA SCLK	GPIO5	bidirectional	SPI Clock Line for LoRa
11	LORA CS	GPIO18	output	SPI Chip Select for LoRa
12	LORA RST	GPIO14	output	LoRa Reset
13	LORA DIO0	GPIO26	input	LoRa Interrupt Pin
14	DS3231 SDA	GPIO21	bidirectional	I2C Data Line for DS3231 RTC
15	DS3231 SCL	GPIO22	bidirectional	I2C Clock Line for DS3231 RTC
16	LED_BUILTIN	GPIO2	output	Built-in LED
17	ADC1_CH0	GPIO36	input	Analog Input Channel 0
18	DAC1	GPIO25	output	Digital-to-Analog Converter 1
19	DAC2	GPIO26	output	Digital-to-Analog Converter 2

Legend

Function Pin role

GPIO ESP32 pin

I/O Direction

# Pin number

Pin Mappings

Complete pinout and GPIO mapping for TTGO T7 V1.3 Mini32

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	MISO
21			PWM	SDA
22			PWM	LED_BUILTIN 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

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 TTGO T7 V1.3 Mini32

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)