TTGO T-OI PLUS RISC-V ESP32-C3

Development Board

Code name: TTGO-T-OI-PLUS_DEV

ESP32C3 LILYGO

TTGO T-OI PLUS RISC-V ESP32-C3 is a development board based on the ESP32C3 microcontroller using RISCV32 architecture.

This board features a maximum CPU frequency of 160 MHz and 4MB flash memory.

About TTGO T-OI PLUS RISC-V ESP32-C3

LilyGO’s ESP32-C3 board with RISC-V core and USB-C - great for portable, low-cost IoT projects with BLE and Wi-Fi.

Technical Specifications

Complete technical specification details for TTGO T-OI PLUS RISC-V ESP32-C3

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32c3

Clock Speed 160 MHz

Flash Size 4MB

Architecture riscv32

✨ Features & Pins

Digital IO 12

Analog Input 3

Interrupts 12

Quick Setup

Copy-paste configs for TTGO T-OI PLUS RISC-V ESP32-C3 - auto‑generated from this board's exact hardware specs.

ESP32C3 160 MHz 4MB QIO RISC-V

In Arduino IDE 2 select Ttgo-t-oi-plus Dev from the esp32 by Espressif package. In PlatformIO use board = esp32-c3-devkitm-1. ESP32C3 · 160 MHz · 4MB · QIO · RISC-V.

Tools menu settings

Board (select in Arduino IDE) Ttgo-t-oi-plus Dev

CPU Frequency 160 MHz

Flash Size 4MB

Flash Mode QIO

Upload Speed 921600

Architecture RISC-V

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Ttgo-t-oi-plus Dev" for the TTGO T-OI PLUS RISC-V ESP32-C3.

platformio.ini


[env:ttgo-t-oi-plus]
platform  = espressif32
board     = esp32-c3-devkitm-1
framework = arduino

; Exact hardware config for TTGO T-OI PLUS RISC-V ESP32-C3
board_build.mcu        = esp32c3
board_build.f_cpu      = 160000000L
board_build.flash_size = 4MB
board_build.flash_mode = qio
board_upload.flash_size = 4MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-c3-devkitm-1
  framework:
    type: arduino   # or "esp-idf"

# TTGO T-OI PLUS RISC-V ESP32-C3 - 160 MHz ESP32C3
# Flash: 4MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32c3 \
  --baud 921600 \
  write_flash \
    --flash_mode qio \
    --flash_size 4MB \
    0x0 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x0

TTGO T-OI PLUS RISC-V ESP32-C3 Pinout Diagram

Complete pin reference for TTGO T-OI PLUS RISC-V ESP32-C3

Useful Links

Datasheets and resources for TTGO T-OI PLUS RISC-V ESP32-C3

ESP32C3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for TTGO T-OI PLUS RISC-V ESP32-C3

Digital I/O Pins

Interrupt Pins

Analog Inputs

Pin	Analog	Other
2	A1	BAT_ADC_PIN
3		LED_BUILTIN
4	A2	SCK
5	A3	MISO
6		MOSI
7		SS
18		SCL
19		SDA
20		RX
21		TX

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 T-OI PLUS RISC-V ESP32-C3

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	qio
Boot mode	qio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)