The BM22S4021-1 is a member of the BM22S402x-1 PIR sensor series and has been calibrated at factory. The trigger mode and triggered time of the product are configurable. Furthermore, it includes temperature compensation and ambient light detect (configure via software) functions.
PIR sensors (Passive Infrared Sensor) allow you to sense motion, almost always used to detect whether a human has moved in or out of the detection range.
They are small, inexpensive, low-power, easy to use, and don't wear out. For these reasons, they are commonly found in appliances and gadgets used in homes or businesses, such as security systems, automatic doors, intelligent lighting, garden lights, guest reception monitors, etc.
The BM22S402x-1 series integrate Fresnel lens, one PIR sensor, and DSP algorithms.The Fresnel lens is used to help focus the PIR sensor's field of view.
Compared to the HT7M21xx series, this series can be more suitable for your applications. Multiple parameters are configurable, such as sensitivity, trigger threshold, and triggered time, etc. It also supports UART interface to automatically output current status of the product every 50ms.
| Pin | Pin name | Function |
|---|---|---|
| 1 | GND | Ground |
| 2 | VDD | Power supply: 2.7V to 5.5V |
| 3 | RX | UART RX |
| 4 | TX | UART TX |
| BM22S4221-1 | BM22S4021-1 | BM22S4022-1 | BM22S4023-1 | BM22S4024-1 | |
|---|---|---|---|---|---|
| Operating voltage | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Lens type | Ceiling mounted
Wall mounted |
Ceiling mounted | Ceiling mounted | Wall mounted | Wall mounted |
| Detection range
(Max.) |
13.2 meters | 3 meters | 4 meters | 4 meters | 10 meters |
| FoV | 122° / 106° | 121° / 77° | 86° / 75° | 91° / 10° | 10° / 20° |
| Re-triggered
function |
X | O | O | O | O |
| Pin | 5 | 4 | 4 | 4 | 4 |
| Dimension | Ф23.5 mm | Ф10.15 mm | Ф12 mm | Ф10 mm | Ф10.1 mm |
| HS Code (reference) | 8517.79.00.00-6 |
|---|
