In many DIY cybersecurity and embedded electronics projects, the Flipper Zero is well known for its ability to capture and transmit infrared (IR) signals. But what if you want to build a low-cost, IR-capable device using an ESP32 instead?
This article explains how different IR modules work, what features are required for remote-style communication, and why choosing the correct module is essential when building a Flipper-style IR system.
Understanding IR Modules
Infrared (IR) modules are commonly used for three different purposes:
- Receiving signals from remote controls
- Transmitting IR commands to devices
- Detecting nearby objects or surfaces
Although these modules all use infrared light, they are designed for very different tasks. Some are built for obstacle detection, while others are designed for data communication using modulated IR signals.
Why the HW-201 Cannot Replace a Flipper-Style IR Module
The HW-201 is a short-range obstacle detection sensor. Its operating principle is simple:
- The IR LED emits infrared light.
- The light reflects off a nearby object.
- The receiver detects the reflection.
- The module outputs a digital HIGH or LOW signal.
Key limitations
- It cannot read IR remote control protocols.
- It cannot transmit IR command signals.
- It only detects whether an object is present.
Typical HW-201 range
- 2 cm to 30 cm
Because of this limited functionality and short range, the HW-201 is not suitable for IR communication projects.
Requirements of a Flipper-Style IR System
To replicate the IR capabilities of a Flipper-style device, the system must support the following:
| Feature | Required |
|---|---|
| Receive IR signals | Yes |
| Transmit IR signals | Yes |
| Decode protocols | Yes |
| Store commands | Yes |
| Screen interface | Optional |
These features enable the device to capture, analyze, store, and replay IR commands.
Correct DIY IR Using ESP32
A proper IR communication setup using an ESP32 typically includes the following components:
Core components:
- ESP32 development board
- IR receiver (38 kHz infrared receiver module)
- IR transmitter (38 kHz infrared transmitter module)
Capabilities of this setup
- Capture signals from remote controls
- Decode IR protocols
- Store commands in memory
- Re-transmit stored commands to devices
This configuration provides the core functionality required for a Flipper-style IR system.
Recommended Single IR Module
If you prefer a single, plug-and-play module instead of separate components, a 38 kHz IR transmitter and receiver module is the most practical option.
Common names
- IR Transceiver Module
- IR Combo Module
- 38 kHz IR TX/RX Module
- IR Infrared Transmitter Module + 38 kHz Receiver Module
Key features
- Integrated IR receiver
- Integrated IR transmitter
- Direct GPIO control
- Compatible with ESP32 and Arduino
- Suitable for Flipper-style IR tools
Typical operating range
5–8 meters under normal conditions
10–12 meters with a driver circuit
This performance is comparable to a standard TV remote and similar to the IR capabilities of a Flipper Zero.
Typical Cost of a DIY Setup
| Component | Approx. price |
|---|---|
| ESP32 board | ₹400–₹600 |
| IR combo module | ₹110–₹200 |
| OLED display | ₹170–₹300 |
| Total | ₹680–₹1100 |
Final Recommendation
For a simple and effective Flipper-style IR project:
Recommended module:
38 kHz IR Transmitter and Receiver Module
Key advantages:
- Low cost
- Easy integration
- Full IR communication support
- Compatible with ESP32 platforms
Conclusion
When building a DIY IR system:
- Avoid obstacle sensors like the HW-201 for communication tasks.
- Use modules designed specifically for IR signal transmission and reception.
- For simplicity, a 38 kHz IR combo module is the best choice.
With an ESP32 and the right module, you can create a powerful, low-cost IR device capable of capturing, storing, and transmitting remote control signals.
Product Links
Below are example product links for the components mentioned in this article. You can purchase them from local electronics stores or trusted online suppliers.
ESP32 Development Board
38 kHz IR Transmitter + Receiver Combo Module
OLED Display (0.96" I2C)
Note:
You can also find these components at local electronics markets (such as Ritchie Street in Chennai) at lower prices.
When buying locally, ask for:
- ESP32 development board
- 38 kHz IR transmitter + receiver module
- 0.96" OLED display (I2C)