====== Radar Module RD-xx ======
===== Radar Module Rd-03 =====
{{ :sensor:rd_03_02.png?180|Radar Module Rd-03}}
The Radar Module **Rd-03** features silicon micro-S3KM1110 chips, which are integrated single-chip millimeter-wave sensor SoCs based on **FMCW** (//Frequency-Modulated Continuous-Wave//) radar transceiver technology. The S3KM1110 operates in the 24 GHz K-band, with a maximum modulation bandwidth of 1 GHz per frequency.

The FMCW continuous wave technology is used to detect targets within a specific area. When combined with radar signal processing and an accurate human body sensing algorithm, it enables high-sensitivity detection of human presence. This allows for recognizing human bodies in both moving and still states.

The Rd-03 module can detect the presence of a moving or micro-movements of a human body within a specific area and provides real-time detection results. It includes a visual configuration tool that makes it easy to set the sensing distance, sensitivity levels, and unmanned delay time.

==== Technical characteristics ====
^Package|DIP-5|
^Chip|S3KM1110|
^Size|20 * 20 mm|
^Antenna|On-board antenna|
^Frequency|24 .. 24.25 GHz K-band|
^Operation temperature|-40 .. 85 ℃|
^Storage environment|-40 .. 125 ℃, < 90% RH|
^Support voltage|**3.0 .. 3.6 V**| 
^Power supply current ≥200m A|
^Range|< 10 m|
^Max Sensing Range|< 5 m|
^Radar angle|±60 degrees|
^Interface|UART|
^UART baud rate|Default 115200 bps|

<WRAP center round important 100%>
Rd-03 is an electrostatically sensitive piece of equipment; special precautions should be taken during handling.
</WRAP>

==== PIN out ====
{{ :sensor:rd_03_01.png?180|Radar Module Rd-03}}
^3V3|input power|
^GND|Ground|
^OT1|UART_TX|
^RX|UART_RX|
^OT2|Detection result output, output high level when sensing, output low level when not sensing|
==== Characteristics of perception ====
|{{ :sensor:rd_03_03.png |}}|{{ :sensor:rd_03_04.png |}}|
|Characteristics of a sensor installed on the ceiling, approximately 2.6 to 3 meters high.|Horizontal characteristic of a sensor mounted on a wall, approximately 1.5 to 2 meters high.|
===== Sources =====
https://cdn.robotshop.com/media/A/Ait/RB-Ait-27/pdf/ai-thinker-radar-module-rd-03-datasheet.pdf

===== Sensor topics on lamaPLC =====
{{topic>sensor}}

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{{tag>radar S3KM1110 FMCW Rd-03 K-band 24_GHz sensor distance micro-movements}}
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