LD2410C Human Presence Sensor Configuration with App, Circuit and Test with Arduino Micro

1/*
2 * Sketch example for reporting LD2410 readings using the currently configured setup.
3 * 
4 * This has been tested on the following platforms...
5 * 
6 * On ESP32, connect LD2410 to GPIO pins 32 and 33
7 * On ESP32S2, connect LD2410 to GPIO pins 8 and 9
8 * On ESP32C3, connect LD2410 to GPIO pins 4 and 5
9 * On Arduino Leonardo or other ATmega32u4 boards, connect LD2410 to the hardware serial TX and RX pins
10 * 
11 * Serial configuration for other boards will vary and should be assigned by yourself
12 * 
13 * There's no example for ESP8266 as it only has one usable UART and won't boot if alternative UART pins are used for the radar.
14 * 
15 * For this sketch and other examples to be useful, the board must have two usable UARTs.
16 * 
17 */
18int redPin = 11; //  Red pin 
19int greenPin = 9; // Green pin
20int bluePin = 10; // Blue pin
21byte com = 0; 
22#if defined(ESP32)
23  #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
24    #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
25      #define MONITOR_SERIAL Serial
26      #define RADAR_SERIAL Serial1
27      #define RADAR_RX_PIN 32
28      #define RADAR_TX_PIN 33
29    #elif CONFIG_IDF_TARGET_ESP32S2
30      #define MONITOR_SERIAL Serial
31      #define RADAR_SERIAL Serial1
32      #define RADAR_RX_PIN 9
33      #define RADAR_TX_PIN 8
34    #elif CONFIG_IDF_TARGET_ESP32C3
35      #define MONITOR_SERIAL Serial
36      #define RADAR_SERIAL Serial1
37      #define RADAR_RX_PIN 4
38      #define RADAR_TX_PIN 5
39    #else 
40      #error The CONFIG_IDF_TARGET target is not supported
41    #endif
42  #else // ESP32 before IDF 4.0
43    #define MONITOR_SERIAL Serial
44    #define RADAR_SERIAL Serial1
45    #define RADAR_RX_PIN 32
46    #define RADAR_TX_PIN 33
47  #endif
48#elif defined(__AVR_ATmega32U4__)
49  #define MONITOR_SERIAL Serial
50  #define RADAR_SERIAL Serial1
51  #define RADAR_RX_PIN 0
52  #define RADAR_TX_PIN 1
53#endif
54#include <ld2410.h>
55ld2410 radar;
56uint32_t lastReading = 0;
57bool radarConnected = false;
58void setup(void)
59{
60  pinMode(redPin, OUTPUT); // Set redPin as an output
61  pinMode(greenPin, OUTPUT); // Set greenPin as an output
62  pinMode(bluePin, OUTPUT); // Set bluePin as an output
63  MONITOR_SERIAL.begin(115200); // Serial Monitor feedback
64  // radar.debug(MONITOR_SERIAL); // Uncomment to show library debug info on Serial Monitor. By default, this does not show sensor readings as they are very frequent.
65  #if defined(ESP32)
66    RADAR_SERIAL.begin(256000, SERIAL_8N1, RADAR_RX_PIN, RADAR_TX_PIN); // UART for radar monitoring
67  #elif defined(__AVR_ATmega32U4__)
68    RADAR_SERIAL.begin(256000); // UART for radar monitoring
69  #endif
70  delay(500);
71  MONITOR_SERIAL.print(F("\nConnect LD2410 radar TX to GPIO:"));
72  MONITOR_SERIAL.println(RADAR_RX_PIN);
73  MONITOR_SERIAL.print(F("Connect LD2410 radar RX to GPIO:"));
74  MONITOR_SERIAL.println(RADAR_TX_PIN);
75  MONITOR_SERIAL.print(F("Initializing LD2410 radar sensor: "));
76  if(radar.begin(RADAR_SERIAL))
77  {
78    MONITOR_SERIAL.println(F("OK"));
79    MONITOR_SERIAL.print(F("LD2410 firmware version: "));
80    MONITOR_SERIAL.print(radar.firmware_major_version);
81    MONITOR_SERIAL.print('.');
82    MONITOR_SERIAL.print(radar.firmware_minor_version);
83    MONITOR_SERIAL.print('.');
84    MONITOR_SERIAL.println(radar.firmware_bugfix_version, HEX);
85  }
86  else
87  {
88    MONITOR_SERIAL.println(F("not connected"));
89  }
90}
91void loop()
92{
93  radar.read();
94  if(radar.isConnected() && millis() - lastReading > 1000)  // Report every 1000ms
95  {
96    lastReading = millis();
97    if(radar.presenceDetected())
98    {
99      if(radar.stationaryTargetDetected())//If a stationary target is detected, it turns blue
100      {
101        Serial.print(F("Stationary Target BLUE LIGHT: "));
102        Serial.print(radar.stationaryTargetDistance());
103        Serial.print(F("cm energy:"));
104        Serial.print(radar.stationaryTargetEnergy());
105        Serial.println(' ');
106        color(0, 0, 255); // RGB LED as blue
107      }
108      if(radar.movingTargetDetected())//If a moving target is detected, it turns red
109      {
110        Serial.print(F("MOVING TARGET DETECTED RED LIGHT!: "));
111        Serial.print(radar.movingTargetDistance());
112        Serial.print(F("cm energy:"));
113        Serial.print(radar.movingTargetEnergy());
114        color(255, 0, 0);// RGB LED as red
115      }
116      Serial.println();
117    }
118    else
119    {
120      Serial.println(F("No Target GREEN LIGHT"));//No target in range, turns green
121      color(0,255, 0);// RGB LED as green
122    }
123  }
124}
125//Function for generating color
126void color (unsigned char red, unsigned char green, unsigned char blue) 
127{
128analogWrite(redPin, red*102/255);
129analogWrite(bluePin, blue*173/255);
130analogWrite(greenPin, green*173/255);
131}