Recommended Free Tools
Choose a PIR sensor if your ESP32 display only needs to wake when someone moves. Choose an HLK-LD2410 mmWave presence module if the display should stay active while someone sits still. The radar’s advantage comes with a specified power supply, UART or status-pin integration, and detection-zone tuning; it is not a drop-in equivalent to every PIR board.
What is the practical difference between PIR and mmWave?
A passive infrared (PIR) sensor responds to changes in infrared energy associated with a warm object against its background. Texas Instruments’ sensor-technology comparison describes mmWave radar as measuring phase and frequency shifts in reflected millimeter waves; time-of-flight measurements are also used. In practical display projects, PIR commonly serves as a motion trigger, while the HLK-LD2410 is documented to report both moving and static human targets. Radar capabilities vary by model, so that behavior should not be assumed of every mmWave module.
Will it detect someone sitting still?
PIR: wake on movement
A PIR module is a good fit when the display can sleep after the user stops moving, or when the desired behavior is simply to wake the screen as someone approaches. TI’s broad technology comparison lists PIR range as 10–12 m and characterizes PIR as the lowest-cost and lowest-power option in its comparison table. Those entries are technology-level comparisons, not guarantees for a particular retail module or room installation.
HLK-LD2410: presence during stillness
The HLK-LD2410 manual says the module can sense static and slight human movement. That makes it the better match when someone sitting at a desk should continue to count as present even without obvious motion. The display firmware still needs to decide what to do with the sensor’s presence state—for example, when to dim or sleep after the room becomes unoccupied.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Compare power, wiring, and firmware effort
| Consideration | PIR motion sensor | HLK-LD2410 mmWave module |
|---|---|---|
| Best fit | Movement should wake or trigger the display. | Presence should persist while a person is still. |
| Power | TI’s technology comparison labels PIR the lowest-power option; actual module consumption is not stated there. | The HLK-LD2410 manual specifies a 5–12 V input. Plan for the chosen module’s supply rather than assuming the ESP32’s 3.3 V rail is suitable. |
| Controller interface | A simple digital trigger is common, but verify the specific PIR board’s pin behavior in its own documentation. | The manual documents a target-status output pin and serial data over UART at a default 256000 baud. |
| Firmware | Often suited to a simple trigger-based response; confirm the chosen board’s output logic and timing. | Use the status output for a basic detected/not-detected signal, or parse UART data for target state and distance-related auxiliary information. |
| Setup | Check the selected module’s documented coverage and mounting guidance. | Configure the farthest detection distance and sensitivity by distance gate for the intended area. |
How to connect an HLK-LD2410 to an ESP32
The HLK-LD2410 manual specifies VCC, ground, UART TX and RX, and an optional OUT target-status pin. It gives the module a 5–12 V power input, 3.3 V IO, and default serial settings of 256000 baud, one stop bit, and no parity. In a conventional UART connection, cross the data lines: sensor TX to ESP32 RX, and sensor RX to ESP32 TX. The manual specifies a high target-status level when a person is detected.
- Check the exact module and board. Confirm the LD2410 variant’s pinout and supply needs, and identify the ESP32 board’s available UART pins and suitable power source.
- Provide sensor power and a common ground. Supply the sensor within its specified 5–12 V input range; do not treat the 3.3 V IO specification as a 3.3 V power-input specification.
- Choose the interface. Connect OUT to a suitable ESP32 input for a simple target-status signal, or connect crossed TX/RX lines for serial data. Follow the board and module documentation for safe wiring.
- Set the UART configuration if using serial. Start with 256000 baud, one stop bit, and no parity, then configure the firmware to match.
- Test the detection area before setting display behavior. Confirm that the sensor reports presence where intended and that the display responds appropriately to both movement and stillness.
A public ESP32-C3 and LD2410C example powers the radar from 5 V and uses 3.3 V UART directly to the controller, with TX and RX crossed. Its README describes ESPHome 2024.2 or newer for the built-in component used in that example and also provides an Arduino sketch path. Treat it as one configuration example, not a wiring or software guarantee for every ESP32 board, sensor variant, or later release.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
How to choose and tune the detection zone
The room and mounting position matter as much as the sensor category. The LD2410 manual supports setting a farthest detection distance and sensitivity by distance gate, so tune those settings around the portion of the room where the display should respond. TI’s comparison notes that radar can detect motion beyond an intended area, including through walls; activity outside the target zone can therefore affect behavior. Check the chosen module’s documented coverage and adjustment options before relying on a stated range.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Physical fit and module variants
The base HLK-LD2410 is listed with a 1.27 mm pin pitch, which may call for an adapter or careful soldering during prototyping. Product suffixes can change features and connector format, so verify the exact variant’s pin spacing, connector, and power requirements before choosing parts. A specific retail PIR board is not established here; select one whose own documentation confirms its output behavior and electrical requirements.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsQuick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Which sensor should you use?
- Choose PIR when movement is enough to wake the display, low-power simplicity is the priority, and continued detection during stillness is unnecessary.
- Choose the HLK-LD2410 when the display must treat a seated, nearly motionless person as present and you can accommodate its power, interface, and tuning requirements.
- Before building, verify the exact module variant, ESP32 supply and UART availability, mounting location, and the area in which detection should occur.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
