ERD-RS211 Series
Key Features
Function
Human Presence Detection
Detection Area
6m @FOV:120°
Frequency Band
24GHz
Output Interface
IIC、UART、IO
Size
12x8x1.35mm
Overview
This is a 5.8GHz radar module with built-in strong anti-interference algorithm and stable mobile sensing performance; it also has the capabilities of adjustable sensing range and light intensity detection. Users can also choose the power consumption and size themselves. Its wide application range and strong adaptability make it the preferred choice for creating intelligent offices, smart homes, and smart lighting fields.
Specifications
| Modulation System | FMCW |
| Antenna | 1T1R |
| Input Voltage | 3-5.5V |
| Operating Current | 20µA @ 3.3V |
| Operating Temperature | -40℃ to 85℃ |
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FAQs
Why does the sensor become less sensitive after being installed into the final product?
Check if the spacing between the module and the product structure is
equal to a half-wavelength.
Verify that the input voltage ripple of the module is less than 100mV.
Ensure that the housing material does not contain metal.
Will multiple modules interfere with each other if used simultaneously?
Avoid facing the antennas directly toward each other for modules operating within the same 24GHz frequency band.
For ceiling-mount installations, maintain a distance of 3 meters between adjacent modules.
Does the module come with pre-installed firmware?
No, the module is shipped without firmware. The user's main controller must host and download both the firmware and configuration files to the module, and the driver porting work needs to be completed on the controller side.
Is debugging this module very complicated?
Not at all. We provide a complete host computer debugging tool and open up the low-level configuration parameters, giving users greater flexibility and autonomy during the debugging process.
Related Information
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24 Mar,2026
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24 Mar,2026
Earda’s 60GHz Millimeter-Wave Radar Presence Sensor Deployed in Premium Smart Homes, Accurately Detects Stationary Occupancy and Micro-Movements
24 Mar,2026
We are here to help you.
Customer SupportLooking for more information about our products and solutions? Contact our team at marketing@eardatek.com
Contact Info
Lianfeng Originality Park A, JiSheng Rd. No.2, HuangGe Town, NanSha District, Guangzhou, PRC.
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