---
product_id: 84567201
title: "Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack"
brand: "smart"
price: "€ 38.55"
currency: EUR
in_stock: true
reviews_count: 2
category: "Luabby Smart"
url: https://www.desertcart.pt/products/84567201-nordic-ble-4-0-nrf51822-controller-chip-bluetooth-module-small
store_origin: PT
region: Portugal
---

# Low power BLE 4.0 nRF51822 chip Compact 18.5x9.1x2.0mm size 45m Class II Bluetooth range Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack

**Brand:** smart
**Price:** € 38.55
**Availability:** ✅ In Stock

## Summary

> 📶 Tiny chip, massive wireless potential — stay connected, stay ahead!

## Quick Answers

- **What is this?** Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack by smart
- **How much does it cost?** € 38.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/84567201-nordic-ble-4-0-nrf51822-controller-chip-bluetooth-module-small)

## Best For

- smart enthusiasts

## Why This Product

- Trusted smart brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Miniature Marvel:** Industry’s smallest BLE 4.0 module fits seamlessly into sleek, space-conscious designs.
- • **Robust Data Handling:** Handles up to 200-byte data packets with transparent transmission for fast, reliable communication.
- • **Versatile Compatibility:** Works flawlessly with iOS & Android, powering smart wearables, home devices, and IoT prototypes.
- • **Customizable Connectivity:** Supports AT commands to tweak baud rate, device name, and MAC address for tailored wireless control.
- • **Plug & Play UART Interface:** Standard UART (TTL) interface enables effortless integration with your MCU—no Bluetooth stack headaches.

## Overview

The Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module is a compact, low-power wireless solution featuring a 256KB flash and 16KB RAM, supporting transparent UART communication and AT command customization. With a small footprint of 18.5 x 9.1 x 2.0mm and a 45-meter Bluetooth range, it’s ideal for smart devices and IoT applications requiring efficient, reliable BLE connectivity.

## Description

Memory：256KB flash + 16KB RAM memory  Transparent transmission (Bridged method) easy to use and fast, no Bluetooth protocol stack development experience can use too. ； The user interface uses a standard UART (TTL) Interface, bidirectional data read, easy to operate； Supports serial AT commands, the user can modify the basic parameters like the serial port baud rate (default 9600bps), name, MAC address of the module, etc  Serial data packet length, single data packet can support data length up to 200byte；；  Serial hardware enable control, low-power control applications ；  With the support under the test mode but not connect the serial mode, mutual communication between test module and bluetooth master devices  Operating distance: 0~45m，class II level ；  Support System: IOS & Android；  Supply voltage：2.0～3.6V（3.3V typical）；  Module comes with PCB antenna, optional external antenna； Size：18.5×9.1×2.0mm Applications: Electronic scales Electronic cigarette Smart cups Smart bracelet Smart Watch Bluetooth toys Intelligent hardware Smart Home Package: BLE4.0 module X 5 pcs

Review: These modules as shipped do not fully work - The YTX chips come with firmware that provides a serial interface supposedly allowing BLE to work properly. There is a problem. These BLE modules can be configured (via AT command set), broadcast and connect just fine. You can send them BLE data packets and see it come out of the module Rx port. However, you cannot send any user BLE data out of the module. If there is some special character sequence to make that happen, it is not documented. ENABLE line high or low does not matter. I have a full-blown BLE sniffer (using Nordic nRF 51 DK) that confirms this using 2 different modules. I was able to reprogram one of them but that is not what I bought.
Review: These work as expected - These do what they are supposed to (accept firmware flashing and do what you tell them to) and have found homes in my custom electronics prototypes. Now, if only I could find better bundles for TI CC1101s.

## Features

- Nordic 51822 BLE 4.0 module
- YTX51822-S01 is a high performance ,low power radio transmit and receive system module based on Nordic BLE 4.0 nRF51822 controller chips.
- It has the smallest volume package in the industry, the size is 18.5 X 9.1X 2.0, suitable for most applications which pay more attention to the size.
- The module integrate the complete standard low energy Bluetooth 4.0 protocol stack S110 drive.
- Customer's MCU is connected to the module by UART port, it will automatically send a broadcast code after the module starts.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07H8KG4XF |
| Best Sellers Rank | #467 in Bluetooth Network Adapters |
| Customer Reviews | 2.7 2.7 out of 5 stars (4) |
| Date First Available | September 11, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.16 ounces |
| Item model number | YTX51822-S01 |
| Manufacturer | COOLTECH |
| Product Dimensions | 0.73 x 0.36 x 0.08 inches |

## Product Details

- **Brand:** Luabby Smart
- **Color:** YTX51822-S01 X 5PCS
- **Compatible Devices:** Desktop
- **Data Link Protocol:** Bluetooth
- **Data Transfer Rate:** 9600 Megabits Per Second
- **Hardware Interface:** Bluetooth
- **Item Weight:** 0.01 Pounds
- **Manufacturer:** COOLTECH
- **Product Dimensions:** 0.73"L x 0.36"W x 0.08"H

## Images

![Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack - Image 1](https://m.media-amazon.com/images/I/61vYDPKX0CL.jpg)
![Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack - Image 2](https://m.media-amazon.com/images/I/61odoj074qL.jpg)
![Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack - Image 3](https://m.media-amazon.com/images/I/41NynVFrmCL.jpg)
![Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack - Image 4](https://m.media-amazon.com/images/I/51cN0dEa7XL.jpg)
![Nordic BLE 4.0 nRF51822 Controller Chip Bluetooth Module Small Size 18.5 x 9.1x 2.0mm 5 Pack - Image 5](https://m.media-amazon.com/images/I/51AUEtF4duL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Where is the documentation for this device? The download link provided by Luabby Smart does not work - there is no way to download.**
A: Dear Customer, We just tried, this link is working :  https://pan.baidu.com/s/1Ts7OtkWe1s08YtV6Ly0YOw
If you cannot download, you can send e-mail to me.  My e-mail :  info@cooltech-hk.com
I will reply you by e-mail.

Thank you !

**Q: Where is the documentation for this device? The download link provided by "Lucy Wang" does not work - there is no way to download.**
A: This is likely the closest you'll find 


http://www.wireless-tag.com/wireless_module/BLE/WT51822-S4AT.html

**Q: I have written my own nrf51822 application. can i download it to the on-chip flash through the swdio and swdclk pins using st-link and keil tools?**
A: Sure, no problem! 
We have already led out the burning port : )

**Q: Do you have a pinout for the breakout?**
A: yes, we have the pinout diagram, will update on the listing soon

## Customer Reviews

### ⭐⭐ These modules as shipped do not fully work
*by M***R on December 4, 2020*

The YTX chips come with firmware that provides a serial interface supposedly allowing BLE to work properly. There is a problem. These BLE modules can be configured (via AT command set), broadcast and connect just fine. You can send them BLE data packets and see it come out of the module Rx port. However, you cannot send any user BLE data out of the module. If there is some special character sequence to make that happen, it is not documented. ENABLE line high or low does not matter. I have a full-blown BLE sniffer (using Nordic nRF 51 DK) that confirms this using 2 different modules. I was able to reprogram one of them but that is not what I bought.

### ⭐⭐⭐⭐⭐ These work as expected
*by A***A on July 18, 2019*

These do what they are supposed to (accept firmware flashing and do what you tell them to) and have found homes in my custom electronics prototypes. Now, if only I could find better bundles for TI CC1101s.

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-26*