SKU: 31988678635

Seeed XIAO BLE nRF52840 Sense

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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13

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Description

Seeed XIAO BLE nRF52840 SenseSeeed Studio XIAO Series are diminutive development boards, sharing a similar hardware structure, where the size is literally thumb sized. The code name "XIAO" here represents its half feature "Tiny", and the other half will be "Puissant". Compared to the regular XIAO BLE nRF52840 , this module adds two new sensors, an IMU and a Microphone. Features Versatile Microcontroller: Incorporate the Nordic nRF52840 chip with FPU, operating up to 64 MHz,

Seeed Studio XIAO Series are diminutive development boards, sharing a similar hardware structure, where the size is literally thumb-sized. The code name "XIAO" here represents its half feature "Tiny", and the other half will be "Puissant".

Compared to the regular XIAO BLE nRF52840 , this module adds two new sensors, an IMU and a Microphone.

Features

  • Versatile Microcontroller: Incorporate the Nordic nRF52840 chip with FPU, operating up to 64 MHz, mounted multiple development ports, supported by Arduino / CircuitPython
  • Wireless Capabilities: Implement Bluetooth 5.0, BLE functions with onboard antenna, also provide NFC connectivity
  • Elaborate Power Design: Provide ultra-low power consumption as 5 μA in deep sleep mode while supporting lithium battery charge management
  • Thumb-sized Design: 21 x 17.5mm, Seeed Studio XIAO series classic form-factor, suitable for wearable devices
  • Perfect for Production: Breadboard-friendly & SMD design, no components on the back

Seeed Studio XIAO nRF52840 Sense has an ultra-low power consumption of only 5 μA in the deep sleep mode, the embedded BQ25101 chip supports battery charge management which prolongs its use time. Moreover, Seeed Studio XIAO nRF52840 Sense supports the USB Type-C interface which can supply power and download code. It also has rich On-chip Memory of 1 MB flash and 256 kB RAM, and an Onboard Memory of 2 MB QSPI flash. There are 11 digital i/o that can be used as PWM pins and 6 analog i/o that can be used as ADC pins. It supports UART, IIC, and SPI all three common serial ports. 1 Reset button, 1 3-in-one LED, 1 Charge LED, and 1 Bluetooth antenna are on board, allowing developers to debug their code very easily.

As the advanced yet smaller version of the Seeed Studio XIAO nRF52840 , it carries two extra onboard sensors. One of them is a digital microphone created through Pulse Density Modulation(PDM) module on the nRF52840 chip. It can receive audio data in real-time which allows it can be used for audio recognition. The board can receive audio data through the MSM261D3526H1CPM microphone. The other one is 6-axis Inertial Measurement Unit(IMU) which can be applied in TinyML projects like gesture recognition.

The powerful performance makes it perfect for machine learning applications, and the tiny size allows it to be used in wearable devices and Internet of Things projects, not just for prototypes but the mass production. Furthermore, Seeed Studio XIAO nRF52840 is friendly to the communities for its strong software compatibilities, which supports Arduino, Micropython, and CircuitPython. Except for the software, flexible I/O allows it to speak to almost any external device.

Specification

To better support IoT and TinyML AI projects, there is an advanced version "Seeed Studio XIAO nRF52840 Sense" that carries an extra 6-axis IMU and a PDM microphone.

Item Seeed Studio XIAO nRF52840 Seeed Studio XIAO nRF52840 Sense
Processor Nordic nRF52840 The same as Seeed Studio XIAO nRF52840
ARM® Cortex®-M4 with FPU runs up to 64 MHz
Wireless Bluetooth 5.0/NFC The same as Seeed Studio XIAO nRF52840
On-chip Memory 1 MB flash and 256 kB RAM The same as Seeed Studio XIAO nRF52840
Onboard Memory 2 MB QSPI flash The same as Seeed Studio XIAO nRF52840
Interface 1xUART, 1xIIC, 1xSPI, 1xNFC, 1xSWD, The same as Seeed Studio XIAO nRF52840
11xGPIO(PWM), 6xADC
Sensors Onboard PDM digital microphone
Onboard 6-axis IMU
Dimensions 21 x 17.5mm The same as Seeed Studio XIAO nRF52840
Power Circuit operating voltage: 3.3V@200mA The same as Seeed Studio XIAO nRF52840
Charging current: 50mA/100mA
Input voltage (VIN): 5V
Standby power consumption: <5μA

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SKU: 31988678635

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Shell
West Palm Beach, US
★★★★★ 5
Great for Sensitive Skin
Color: Non-Tinted, Size: 1.7 Fl Oz (Pack of 1)
My face has always been sensitive to sunscreens, so I have to be careful with what I use on my face. (Others can cause burning sensations). This sunscreen is great. I had no issues, and unlike other sunscreens, sweat running didn't cause my eyes to burn or water which was great. Keeps my skin protected against the hot Florida sun, so it works!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
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Elizabeth
Louisville, US
★★★★★ 3
And the crowd goes mild
Color: Tinted, Size: 1.7 Fl Oz (Pack of 1)
I had heard such great things but I’m really left a little disappointed. I got the light tinted version, and it’s much darker than anticipated. And the smell is not great. It kind of smells like my grandpa’s trailer and not in a nice, nostalgic way. As a sunscreen though, I have no complaints. The protection is great and at the end of the day that’s what I really need out of this.
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Reviewed in the United States on June 2, 2026
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Verified Purchase
anony227
Charlottesville, US
★★★★★ 5
Instant relief and moisturized skin well!
Size: 3 Ounce (Pack of 1), Style: Cool Down Lotion
We used the Sun Bum Cool Down Aloe Vera Lotion after getting a little too much sun on vacation, and it worked so well. It gave instant cooling relief without any sticky or greasy feeling. The lotion absorbed quickly and actually soothed the burn instead of just sitting on top of the skin like some aloe gels do. The smell is light and tropical—really pleasant and not overpowering. After applying it a couple of times, our skin felt way less hot and tight, and it definitely helped prevent peeling. We’ll absolutely be bringing this with us on every beach trip from now on! Highly recommend if you’re looking for a sunburn solution that actually works and feels good to use.
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Reviewed in the United States on July 11, 2025
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Verified Purchase
Becca Silvernale
Massapequa, US
★★★★★ 5
Sun Bum Cool Down After Sun Lotion
Size: 8 Ounce (Pack of 1), Style: Cool Down Lotion
I would give this more stars if I could! As someone who spends as much time as possible soaking up the sun during the summer, I’ve found a true gem in Sun Bum’s Cool Down After Sun Lotion. This product has become my go-to for post-sun care, and it’s easy to see why—it’s like gold for sun-exposed skin! With its fantastic tropical scent, skin-loving formula, and high ratings on the Yuka app for its all-natural ingredients, this lotion is a standout. Here’s a detailed look at why I highly recommend it for anyone who loves summer adventures. Ingredients and Yuka Rating One of the standout features of Sun Bum’s Cool Down After Sun Lotion is its commitment to clean, natural ingredients, which has earned it excellent reviews on the Yuka app. According to the product description, it’s formulated with soothing aloe vera, vitamin E, and coconut oil, all of which work together to hydrate and nourish sun-exposed skin. These ingredients are free from harmful chemicals like parabens, sulfates, and dyes, making it a safe choice for those prioritizing non-toxic skincare. The Yuka app, known for analyzing product safety, rates this lotion highly for its clean, natural composition, which aligns perfectly with my preference for products that are good for both my skin and the environment. This clean formula gives me peace of mind, knowing I’m not applying anything harsh after a long day in the sun. Scent and Sensory Experience The scent of this lotion is nothing short of phenomenal—it truly smells like summer in a bottle! The tropical, coconut-adjacent fragrance is light and refreshing, evoking the feeling of a beach vacation. Unlike some overpowering or artificial-smelling products, Sun Bum’s scent is gentle yet nostalgic, making the application process a delight. It’s not just about function; this lotion elevates the entire post-sun care routine with its inviting aroma, which lingers subtly on the skin without being overwhelming. Performance and Skin Benefits When it comes to performance, Sun Bum Cool Down After Sun Lotion delivers exceptional results. After hours of playing in the sun—whether swimming, hiking, or lounging on the beach—my skin often feels dry, tight, or slightly irritated. This lotion instantly soothes and cools, providing immediate relief. The lightweight, non-greasy formula absorbs quickly, leaving no sticky residue, which is a huge plus compared to some heavier after-sun products I’ve tried. My skin drinks it up, feeling soft, hydrated, and revitalized after each use. The inclusion of aloe vera helps calm any redness or mild sunburn, while coconut oil and vitamin E lock in moisture, preventing peeling and keeping my skin smooth. I’ve noticed it helps maintain my summer glow without the flakiness that can come from sun exposure. Texture and Application The texture of this lotion is a perfect balance—not too thick like a heavy cream, but not runny like some gels. It has a smooth, serum-like consistency that glides onto the skin effortlessly and absorbs in seconds. I appreciate how a little goes a long way, making the 8-ounce bottle last through many applications. For an extra cooling effect, I sometimes store it in the fridge, which feels incredibly refreshing on warm, sun-kissed skin. The lotion applies evenly, and I’ve used it on both my body and face without any issues, even on my sensitive skin. Durability and Practicality I’ve been using this lotion consistently throughout the summer, and it’s held up beautifully as part of my daily post-sun routine. The bottle is sturdy and travel-friendly, fitting easily into my beach bag or backpack. While Sun Bum notes that shipping to certain areas like Hawaii or Alaska may be restricted due to alcohol content, I’ve had no issues purchasing it locally or online for mainland use. The formula remains effective even after multiple uses in a single day, and I’ve never experienced any separation or change in texture, which speaks to its quality. Comparison to Other After-Sun Products Compared to other after-sun lotions I’ve tried, Sun Bum’s Cool Down stands out for its lightweight feel and natural ingredients. Many gels can feel tacky or sticky, and some creams are too heavy for summer use, but this lotion strikes the perfect balance. Its Yuka-approved clean formula also sets it apart from competitors that may contain questionable chemicals. While some after-sun products focus solely on cooling, Sun Bum’s inclusion of nourishing ingredients like vitamin E and coconut oil makes it a more comprehensive solution for skin recovery. Pros Clean Ingredients: High Yuka rating for all-natural, non-toxic formula with aloe vera, vitamin E, and coconut oil. Fantastic Scent: Tropical, coconut-like fragrance that smells like summer without being overpowering. Lightweight and Non-Greasy: Absorbs quickly, leaving skin soft and hydrated without stickiness. Soothing and Hydrating: Calms redness, prevents peeling, and restores moisture after sun exposure. Versatile: Suitable for face and body, great for sensitive skin, and effective for mild sunburns. Travel-Friendly: Sturdy bottle perfect for beach bags or travel. Cons Price Point: Slightly more expensive than drugstore alternatives, but worth it for the quality and clean ingredients. Conclusion Sun Bum Cool Down After Sun Lotion is a must-have for anyone who loves spending time in the sun. Its clean, natural ingredients, delightful tropical scent, and lightweight, hydrating formula make it a standout in post-sun care. My skin absolutely loves it, and the high Yuka rating gives me confidence that I’m using a product that’s good for me and the environment. Whether you’re recovering from a beach day or just need to soothe sun-exposed skin, this lotion delivers on every front. It’s become an essential part of my summer routine, and I highly recommend it to anyone looking for a reliable, skin-loving after-sun product.
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Reviewed in the United States on July 2, 2025
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Verified Purchase
Julia Porter
Draper, US
★★★★★ 5
great!
Size: 8 Ounce (Pack of 1), Style: Cool Down Lotion
such an amazing lotion, it makes me feel great after being in the sun for a while, and i love the smell!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026

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