The "Which Camera Should I Buy?" Problem
I've been down this rabbit hole more times than I'd like to admit.
You want to build a smart camera. Maybe a security system. Maybe a robot that sees. Maybe a face recognition doorbell.
But which board do you buy - ESP32 Camera Comparison?
The classic ESP32-CAM is cheap and everywhere. The Seeed Studio XIAO ESP32-S3 Sense is tiny and powerful. The DFRobot DFR1154 is feature-packed with night vision and audio.
I've tested all three. Hours of flashing. Countless debug sessions. A few moments of genuine frustration.
Now I'm going to tell you exactly which one you should buy.
The Contenders
| Board | Price (USD) | Key Feature | Best For |
|---|---|---|---|
| ESP32-CAM | $8-12 | Cheap, widely available | Basic streaming, budget projects |
| XIAO ESP32-S3 Sense | $15-20 | Ultra-compact, PSRAM, Seeed ecosystem | Wearables, tight spaces |
| DFRobot DFR1154 | $25-35 | Night vision, mic, speaker, amp | All-in-one AI, voice interaction |
Let's break down each one.
Round 1: ESP32-CAM – The Classic Workhorse
What It Is
The ESP32-CAM is the OG budget camera module. An ESP32 chip, an OV2640 camera, a microSD slot, and a few GPIO pins. That's it. No frills.
Specifications
| Feature | Spec |
|---|---|
| Processor | ESP32 (dual-core, 240 MHz) |
| PSRAM | 4MB |
| Camera | OV2640 (2MP, 1600x1200) |
| Audio | ❌ None |
| Night Vision | ❌ None |
| USB | Micro-USB (needs FTDI programmer) |
| Dimensions | 27×40.5mm |
| Price | $8-12 |
The Good
It's ridiculously cheap. At $8-12, you can buy three for the price of one DFR1154.
Huge community support. Every problem you'll encounter has been solved and posted on a forum somewhere.
Simple to get started. Flash the CameraWebServer example, enter your WiFi credentials, and you're streaming in minutes.
4MB PSRAM is enough for basic streaming. For 99% of hobby projects, you don't need more.
The Bad
No USB programming. You need an external FTDI programmer. That's an extra $5-10 and more wires to manage.
The FTDI connection is finicky. You have to connect GPIO 0 to GND to upload code. Every. Single. Time.
No onboard audio. Want sound? Add an external microphone and speaker module.
No night vision. The OV2640 sensor isn't IR-sensitive.
The image quality is decent but not great. It works. It's not winning any photography awards.
The Verdict
The ESP32-CAM is perfect for:
Learning camera basics without breaking the bank
Projects where price is the #1 concern
Simple streaming to a web browser
Skip it if you need audio, night vision, or a compact form factor.
Round 2: Seeed Studio XIAO ESP32-S3 Sense – The Tiny Powerhouse
What It Is
The XIAO ESP32-S3 Sense is Seeed Studio's ultra-compact camera module. It's part of their "XIAO" family – tiny development boards with big capabilities.
Specifications
| Feature | Spec |
|---|---|
| Processor | ESP32-S3 (dual-core, 240 MHz) |
| PSRAM | 8MB |
| Camera | OV2640 (or OV5640 optional) |
| Audio | ❌ None (needs expansion) |
| Night Vision | ❌ None |
| USB | USB-C (native programming) |
| Dimensions | 21×17.8mm (insanely small) |
| Price | $15-20 |
The Good
It's incredibly small. At 21×18mm, this is the smallest ESP32 camera module available. It fits anywhere.
USB-C programming. No FTDI adapter needed. Just plug and upload.
8MB PSRAM – double the ESP32-CAM. This matters for AI models and high-res images.
The Seeed ecosystem is excellent. Grove connectors, expansion boards, and great documentation.
ESP32-S3 chip means better AI acceleration (vector instructions) than the classic ESP32.
The Bad
No onboard audio. Like the ESP32-CAM, you'll need external modules for sound.
No night vision. Same OV2640 sensor as the classic.
The camera connector is fragile. It's a small ribbon cable that can break if you're not careful.
Limited GPIO breakout. The XIAO form factor means fewer pins accessible compared to the DFR1154.
Smaller community than ESP32-CAM. You'll find help, but not as much.
The Verdict
The XIAO ESP32-S3 Sense is perfect for:
Wearable projects (space is at a premium)
Applications where size matters more than features
Building portable camera systems
Skip it if you need audio, night vision, or easy expansion.
Round 3: DFRobot DFR1154 – The All-in-One AI Camera
What It Is
The DFRobot DFR1154 is a complete edge AI sensor hub. It has a camera, microphone, speaker amplifier, night vision, and an ambient light sensor – all on one board.
Specifications
| Feature | Spec |
|---|---|
| Processor | ESP32-S3 (dual-core, 240 MHz) |
| PSRAM | 8MB |
| Flash | 16MB |
| Camera | OV3660 (2MP, 160° wide angle) |
| Audio | ✅ I2S PDM microphone + MAX98357 amplifier |
| Night Vision | ✅ IR LEDs + ambient light sensor |
| USB | USB-C (native programming) |
| Dimensions | 42×42mm |
| Price | $25-35 |
[caption id="attachment_2738" align="alignnone" width="300"]
Say hello to your next edge AI project! 🤖📸 This is the DFRobot ESP32-S3 AI Camera V1.1, packed with an OV3660 camera sensor, built-in mic, and onboard LEDs. If you are looking to build low-cost face recognition, object tracking, or smart home automation, this tiny board packs a massive punch.[/caption]
The Good
Everything is onboard. Camera. Mic. Speaker amp. Night vision. IR LEDs. Light sensor. This is a complete system.
OV3660 camera is better than OV2640. Higher resolution, better low-light performance, and supports more professional embedded applications .
160° wide-angle lens captures more of the scene.
Night vision works in complete darkness using IR LEDs .
Built-in microphone and speaker amplifier mean you can build voice assistants and interactive systems without extra hardware .
Edge Impulse, YOLO, and OpenCV support for AI models .
Can integrate with ChatGPT for voice-controlled AI assistants .
Gravity connector for easy sensor expansion.
The Bad
The Gravity connector is confusing. It's UART-only, not I2C, which limits what sensors you can attach . Multiple users have reported this confusion.
Known WiFi sensitivity issue. Some units have trouble connecting to certain routers unless you set your 2.4GHz channel to 1 .
Setup is more complex. You'll need to downgrade your ESP32 board package to version 2.0.17 for audio libraries to work.
Serial monitor requires a USB-to-TTL adapter connected to the Gravity port . The USB-C port is for programming only.
Physically larger – 42×42mm won't fit in tiny enclosures.
Higher price. At $25-35, it's the most expensive of the three.
The Verdict
The DFRobot DFR1154 is perfect for:
All-in-one security cameras (night vision + audio)
Voice-activated smart assistants
Edge AI projects running locally
Applications where you want a complete system without extra modules
Skip it if you need ultra-compact size or want to keep costs minimal.
Head-to-Head Comparison
| Feature | ESP32-CAM | XIAO ESP32-S3 Sense | DFRobot DFR1154 |
|---|---|---|---|
| Processor | ESP32 | ESP32-S3 | ESP32-S3 |
| PSRAM | 4MB | 8MB | 8MB |
| Flash | 4MB | 8MB | 16MB |
| Camera Sensor | OV2640 | OV2640 | OV3660 |
| Camera FOV | ~66° | ~66° | 160° |
| Night Vision | ❌ | ❌ | ✅ (IR LEDs + ALS) |
| Microphone | ❌ | ❌ | ✅ (I2S PDM) |
| Speaker Amp | ❌ | ❌ | ✅ (MAX98357) |
| USB Programming | ❌ (needs FTDI) | ✅ (USB-C) | ✅ (USB-C) |
| Dimensions | 27×40.5mm | 21×17.8mm | 42×42mm |
| Price (USD) | $8-12 | $15-20 | $25-35 |
Which One Should You Buy?
Buy the ESP32-CAM if:
| Your Priority | Why |
|---|---|
| Budget | It's the cheapest. Buy three for the price of one DFR1154. |
| Learning | You're new to ESP32 cameras and want something simple. |
| Basic streaming | You just need a live feed in a browser. |
| Large community | Every problem has been solved before. |
Best for: RC car FPV, simple security camera, learning projects.
Buy the XIAO ESP32-S3 Sense if:
| Your Priority | Why |
|---|---|
| Size | It's tiny. Fits anywhere. |
| Portability | Wearables, drones, tight spaces. |
| ESP32-S3 | You want the newer chip and 8MB PSRAM. |
| USB-C | You hate FTDI adapters. |
Best for: Wearable cameras, drones, portable AI projects, tight enclosures.
Buy the DFRobot DFR1154 if:
| Your Priority | Why |
|---|---|
| All-in-one | You don't want to add external mic/speaker/IR modules. |
| Night vision | You need 24/7 monitoring in darkness. |
| Voice interaction | You're building a smart assistant or voice-controlled system. |
| Edge AI | You want to run models locally without the cloud . |
| Wide-angle | You need to see more of the scene (160° vs 66°). |
Best for: AI doorbells, baby monitors with cry detection, smart assistants, license plate recognition
Cost Breakdown (USD)
| Component | ESP32-CAM | XIAO ESP32-S3 Sense | DFRobot DFR1154 |
|---|---|---|---|
| Board | $8-12 | $15-20 | $25-35 |
| FTDI Programmer (if needed) | $5-10 | $0 | $0 |
| MicroSD Card (optional) | $5-10 | $5-10 | $5-10 |
| External Mic/Speaker (if needed) | $10-15 | $10-15 | $0 |
| Total | $18-37 | $15-30 | $25-35 |
The DFR1154's all-in-one design actually makes it competitive when you factor in the cost of adding external modules to the other boards.
Community Support & Learning Resources
All three boards are supported by ESP32's large developer community. However, the DFR1154 benefits from DFRobot's wiki, tutorials, and extensive sample code . With a decade of experience, DFRobot makes it easy to find examples for AI and voice projects.
For the XIAO Sense, Seeed Studio provides similar resources, including tutorials on using the OV5640 camera sensor and integrating with their Grove ecosystem.
What I'm Building Next
I'm currently using the DFRobot DFR1154 for a smart doorbell project. The onboard mic and speaker mean I can add two-way audio without extra hardware. The IR LEDs let it see visitors at night. And the wide-angle lens captures the whole porch.
The ESP32-CAM still has a place in my toolbox – it's my go-to for quick prototypes. The XIAO Sense is perfect for a wearable camera I'm designing.
Each board has its purpose. Choose the one that fits your project, not the one with the most features.
FAQs
Frequently Asked Questions
1. Can I run AI models (like face recognition) on all three boards?
Yes, but with different capabilities. The ESP32-CAM has 4MB PSRAM, which limits the size of models you can run. The XIAO ESP32-S3 Sense and DFRobot DFR1154 both have 8MB PSRAM, which is better for AI workloads. The DFR1154 is specifically designed for edge AI with support for Edge Impulse, YOLOv5, and OpenCV . One developer successfully trained an object classification model to distinguish between a pencil and hand cream using Edge Impulse on the DFR1154 . The ESP32-S3 chip (used in both the XIAO Sense and DFR1154) has vector instructions that accelerate machine learning tasks – something the classic ESP32 lacks.
2. Why is the DFRobot DFR1154 more expensive than the others?
You're paying for the all-in-one integration. The DFR1154 includes: OV3660 camera (better than OV2640) 160° wide-angle lens IR LEDs + ambient light sensor for night vision I2S PDM microphone MAX98357 speaker amplifier 16MB flash (double the others) Pre-soldered headers and components If you were to buy an ESP32-CAM and add all those features separately, you'd spend more money and end up with a mess of wires. The DFR1154's value is in its integration .
3. I heard the DFR1154 has WiFi issues. Is that true?
Some users have reported WiFi connectivity issues with the DFR1154, specifically with certain routers . The board may fail to connect or drop connections frequently. The fix: Manually set your 2.4GHz WiFi channel to Channel 1 in your router settings. This seems to resolve the issue for most users . If you don't have access to your router settings (e.g., dorm or office WiFi), this could be a problem. The ESP32-CAM and XIAO Sense don't have this issue.
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