R2000 R1.1

R2000

A compact, round-bodied digital camera built around the ESP32-P4, designed for fun, accessible photography with a deliberate film-inspired aesthetic.

Overview

The R2000 is a hand-held digital camera on an 70mm circular PCB. Fixed-focus wide-angle lens, film-style filters, RGB flash, and a round touchscreen — all driven by an ESP32-P4 + ESP32-C6 SOM. It's a camera that prioritises feel and fun over clinical image quality.

Features

• 80mm round PCB — compact, pocketable form factor
• OV5640 MIPI CSI-2 sensor — 5MP, fixed focus, wide angle (~1.5m hyperfocal)
• 2.1" round ST7701S touchscreen — live viewfinder and menu UI via LVGL
• 3-channel RGB flash — independent R/G/B control for software-adjustable colour temperature
• Film aesthetic filters — colour grading, grain, vignette, and light leak applied in-camera
• microSD card storage — JPEG capture written directly from hardware encoder
• USB-C — charging and file transfer
• 1000mAh LiPo — onboard single-cell battery

Electrical Hardware

Core SOM

Guition JC-ESP32P4-M3-C6 — a dual-chip SOM combining:

• ESP32-P4 — main application processor, MIPI CSI camera input, RGB display output, hardware JPEG encode, SD/MMC
• ESP32-C6 — WiFi 6 / BLE 5 radio for wireless transfer and future remote control

Schematic

PCB

• LDO bank placed adjacent to OV5640 to keep power traces short
• MT3608 boost converter isolated from camera rails to reduce switching noise
• RGB panel interface traces serpentined for length matching
• SD card traces kept short with 10kΩ pull-ups on CMD and DAT lines

Camera

Display

Flash

Three independent channels let you tune the colour temperature of each shot in software — or go full auto white-balance assist by sampling the scene before firing.

Power

Battery: 1000mAh single-cell LiPo, ~503040 form factor, charged via TP5100.

Firmware

Stack

Task Architecture

Core 0                         Core 1
├── Camera capture task        ├── LVGL UI task
├── JPEG encode task           └── Touch polling task
└── SD write task

Both cores run in genuine parallel — the live viewfinder never stutters during a write.

Capture Pipeline

OV5640 sensor
  └── MIPI CSI-2 DMA → PSRAM framebuffer
        └── HW JPEG encoder
              └── SD write (FAT32)
                    └── JPEG file

Filters

• Colour grading — warm/cool/cross-process presets
• Grain simulation — luminance-dependent noise overlay
• Vignette — radial falloff, adjustable intensity
• Light leak — randomised edge flare, optional per-shot

Getting Started

Prerequisites

• ESP-IDF v5.3 or later (installation guide)
• KiCad 8.x for hardware files

Build Firmware

git clone https://github.com/yourusername/R2000.git
cd R2000/firmware

idf.py set-target esp32p4
idf.py menuconfig     # Set SD card GPIO, display config, etc.
idf.py build
idf.py -p /dev/ttyUSBx flash monitor

Hardware Assembly

1. Order PCB from JLCPCB using files in hardware/pcb/
2. Source components from hardware/bom/ — LCSC preferred for basic parts
3. Flash firmware before installing display and camera to simplify debug access

GPIO Map

See docs/gpio_map.md for the full 30-pin assignment covering RGB display, GT911 touch, OV5640 MIPI/I2C/XCLK, SD card, flash channels, and shutter button.

Design Philosophy

The R2000 isn't trying to be a precise instrument. No AF hunting, no deep menus, no lab-grade colour science. Wide angle and fixed focus means everything is sharp the moment you raise it. The filters are baked in, not bolted on. Round is unusual and that's the point.

If you want clinical accuracy, this is the wrong camera. If you want something that makes you actually want to take pictures, that's what this is for.

Status

License

Hardware and firmware released under MIT License.