【Follow me第二季第2期】扩展任务一：通过外部LTR-329 环境光传感器，上传光线信息

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【Follow me第二季第2期】扩展任务一：通过外部LTR-329 环境光传感器，上传光线信息 [复制链接]

# 扩展任务一：通过外部LTR-329 环境光传感器，上传温湿度到HA，通过HA面板显示数据
## 1、LTR-329传感器
[传感器规格书](https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5062/5591_Web.pdf "传感器规格书")
这个传感器我查了一下，有2种参数可以读取
1、红外光信号强度
2、可见光和红外光的组合信号强度
后面介绍如何在HA看到这两个数据。
## 2、读取所有光强度和红外光强度
```CPP
#include "Adafruit_LTR329_LTR303.h"

Adafruit_LTR329 ltr = Adafruit_LTR329();

void setup() {
Serial.begin(115200);
Serial.println("Adafruit LTR-329 light sensor test");

if (!ltr.begin()) {
  Serial.println("Couldn't find LTR sensor!");
  while (1) delay(10);
}
Serial.println("Found LTR sensor!");

// 设置默认增益、积分时间和测量速率
ltr.setGain(LTR3XX_GAIN_2); // 默认增益
ltr.setIntegrationTime(LTR3XX_INTEGTIME_100); // 默认积分时间
ltr.setMeasurementRate(LTR3XX_MEASRATE_200); // 默认测量速率
}

void loop() {
if (ltr.newDataAvailable()) {
  uint16_t visible_plus_ir, infrared;
  bool valid = ltr.readBothChannels(visible_plus_ir, infrared);
  if (valid) {
  Serial.print("CH0 Visible + IR: ");//可见光
  Serial.print(visible_plus_ir);
  Serial.print("\t\tCH1 Infrared: ");//红外光
  Serial.println(infrared);
  }
}

delay(2000); // 延时以避免数据更新过于频繁
}
```

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用手电筒照这个传感器，可以看到光照强度增大，以此来判断代码有没有写错。

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## 把这两个信息整理到HA里面去

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添加完成以后可以在HA看到2个参数
```CPP
#include "Adafruit_LTR329_LTR303.h"

Adafruit_LTR329 ltr = Adafruit_LTR329();

#include <WiFi.h>
#include <ArduinoMqttClient.h>

char ssid[] = "CMCC-NxAn";  // your network SSID (name)
char pass[] = "mhcsm2m4";  // your network password

char mqtt_user[] = "ject";
char mqtt_pass[] = "ject6666";

WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);

const char broker[] = "192.168.124.4"; // MQTT broker address
int port = 1883;
const char subscribe_topic[] = "/hello";
const char publish_topic_ltr329_visible_light[] = "homeassistant/sensor/ltr329_visible_light/state";
const char publish_topic_ltr329_ir_light[] = "homeassistant/sensor/ltr329_ir_light/state";

void setup() {
Serial.begin(115200);
Serial.println("Adafruit LTR-329 light sensor test");

//连接WIFI
// Connect to WiFi
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
while (WiFi.begin(ssid, pass) != WL_CONNECTED) {
  // failed, retry
  Serial.print(".");
  delay(5000);
}
Serial.println("\nYou're connected to the network");
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
Serial.print("Gateway IP: ");
Serial.println(WiFi.gatewayIP());
Serial.print("Subnet Mask: ");
Serial.println(WiFi.subnetMask());
Serial.print("MAC Address: ");
//Serial.println(WiFi.macAddress());
Serial.println();

//连接MQTT
// Set MQTT username and password
mqttClient.setUsernamePassword(mqtt_user, mqtt_pass);

Serial.print("Attempting to connect to the MQTT broker.");

if (!mqttClient.connect(broker, port)) {
  Serial.print("MQTT connection failed! Error code = ");
  Serial.println(mqttClient.connectError());

while (1);
}

Serial.println("You're connected to the MQTT broker!");

Serial.print("Subscribing to topic: ");
Serial.println(subscribe_topic);

// Subscribe to a topic
mqttClient.subscribe(subscribe_topic);

Serial.print("Waiting for messages on topic: ");
Serial.println(subscribe_topic);

if (!ltr.begin()) {
  Serial.println("Couldn't find LTR sensor!");
  while (1) delay(10);
}
Serial.println("Found LTR sensor!");

// 设置默认增益、积分时间和测量速率
ltr.setGain(LTR3XX_GAIN_2); // 默认增益
ltr.setIntegrationTime(LTR3XX_INTEGTIME_100); // 默认积分时间
ltr.setMeasurementRate(LTR3XX_MEASRATE_200); // 默认测量速率
}

void loop() {
if (ltr.newDataAvailable()) {
  uint16_t visible_plus_ir, infrared;
  bool valid = ltr.readBothChannels(visible_plus_ir, infrared);
  if (valid) {
  Serial.print("CH0 Visible + IR: ");
  Serial.print(visible_plus_ir);
  Serial.print("\t\tCH1 Infrared: ");
  Serial.println(infrared);
  publishMessage_ltr329_visible_light(String(visible_plus_ir));
  publishMessage_ltr329_ir_light(String(infrared));
  }
}

delay(1000); // 延时以避免数据更新过于频繁
}

// Function to publish a message to the MQTT broker
//发布所有可见光信息
void publishMessage_ltr329_visible_light(const String &message) {
mqttClient.beginMessage(publish_topic_ltr329_visible_light);
mqttClient.print(message);
mqttClient.endMessage();
}

// Function to publish a message to the MQTT broker
//发布红外光信息
void publishMessage_ltr329_ir_light(const String &message) {
mqttClient.beginMessage(publish_topic_ltr329_ir_light);
mqttClient.print(message);
mqttClient.endMessage();
}

```
通过这个代码可以在HA看到实时数据

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两个顶峰，
全部光使用了强光手电爆闪模式
红外光使用了小米手机红外遥控器点击了红外操作按钮