# Bluetooth eInk Display Clock with Temperature Humidity Sensor - LYWSD02

**Type:** Product page · **SKU:** ADA5023 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/bluetooth-eink-display-clock-with-temperature-humidity-sensor-lywsd02.html ([markdown](https://core-electronics.com.au/bluetooth-eink-display-clock-with-temperature-humidity-sensor-lywsd02.html.md))

Here is a jolly cute Bluetooth-enabled sensor-and-digital-clock to monitor your room's temperature and humidity. Only 110mm x 55mm, we dig its medium-size form factor and minimal design.

## Pricing

- **Price:** $59.50 (inc GST) — $54.09 AUD, exc GST
- **Quantity discounts:** 10+ $52.47 (exc GST) · 50+ $51.38 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 31 and Sep 03.

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## Description

Here is a jolly cute Bluetooth-enabled sensor-and-digital-clock to monitor your room's temperature and humidity. Only 110mm x 55mm, Adafruit dig its medium-size form factor and minimal design. The shell is made of durable ABS material. Upfront you get a **3.5" x 1.25" (87mm x 32mm)** eInk display. These sensors are sold to work with the Mijia "Mi Home" App ([iOS](https://apps.apple.com/us/app/mi-home-xiaomi-smarthome/id957323480) and [Android](https://play.google.com/store/apps/details?id=com.xiaomi.smarthome&hl=en_US&gl=US)) - they emit the measured humidity and temperature over Bluetooth LE up to about 10 meters away.

And while it's totally fine to use it with the Mi app, Adafruit like this more for its use cases in general home automation and sensing projects!The sensor has two modes. One is advertising modes, where it sends out sensor data every few minutes. The advertisements are encrypted so not easy to read. You can also connect to it as a BLE device and read from the sensor characteristic, which thankfully is not encrypted. [You can use these with ESPHome / Home Assistant](https://esphome.io/components/sensor/xiaomi_ble.html#lywsd02) as a remote sensor node. They also work great just as an

E-Ink clock, [note that to set the time you should use this web-bluetooth page that will connect and fix the timezone](https://saso5.github.io/LYWSD02-clock-sync/).

Comes with 2 x CR2032 coin cell batteries (pre-installed), a magnet, and adhesive stickers, so you can mount the clock sensor anywhere you please.

### Technical Details

- For further support and information, please go to www.mi.com
- Materials: ABS + PC
- Rated Voltage: 3V
- Temperature Range: 0ºC ~ 60ºC
- Humidity Range: 0-99% RH
- Wireless Connectivity: Bluetooth 4.0, Bluetooth Low Energy
- Product Dimensions: 110.0mm x 55.0mm x 10.1mm / 4.3" x 2.2" x 0.4"
- Product Weight: 60.0g / 2.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/5/0/5023-00.jpg)