智能便携体温计

设计功能包括

• GPIO 排针引出，
• 支持 Arduino IDE 编程，
• 支持WiFi蓝牙连接和通信，
• 实现物联网产品开发快速验证、应用设计
• ……

产品外观

3D 渲染图

外壳

3D 外壳文件见附件。

实物图片

外壳

--------- 2025年3月30日更新 -----------

1.侧边按键板框优化为微凹设计，提升美感和按压手感；

2.优化全铺铜为 45° 网格，(线宽10mil, 间隔10mil)，提升手感与抗干扰性能；

========== 2025年4月11日 =================

1.新增功能描述；

采集 DHT11 温湿度数据并通过 MQTT 联网上传至 Home Assistant 智能家居平台；

----------------------------------

Arduino 代码

#include 
#include 
#include 
#include 
​
// WiFi Configuration
const char* ssid = "xxx";
const char* password = "xxx";
​
// MQTT Configuration
const char* mqtt_server = "192.168.1.121";
const int mqtt_port = 1883;
const char* mqtt_user = "admin";
const char* mqtt_password = "admin";
​
// Device Configuration
const char* device_name = "esp8266_dht11";
const char* device_id = "livingroom_sensor";
​
// Topics
const char* state_topic = "home/sensor/";
const char* temp_config_topic = "home/sensor/";
const char* hum_config_topic = "home/sensor/";
​
// DHT Sensor
#define DHTPIN 5
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
​
WiFiClient espClient;
PubSubClient client(espClient);
​
void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
​
  WiFi.begin(ssid, password);
​
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
​
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}
​
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect(device_name, mqtt_user, mqtt_password)) {
      Serial.println("connected");
      // Send Home Assistant auto-discovery config
      sendAutoDiscoveryConfig();
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}
​
void sendAutoDiscoveryConfig() {
  // Configuration for temperature sensor
  DynamicJsonDocument temp_config(512);
  temp_config["name"] = "Living Room Temperature";
  temp_config["device_class"] = "temperature";
  temp_config["state_topic"] = state_topic;
  temp_config["unit_of_measurement"] = "°C";
  temp_config["value_template"] = "{{ value_json.temperature }}";
  temp_config["unique_id"] = String(device_id) + "_temperature";
  temp_config["device"]["identifiers"] = device_id;
  temp_config["device"]["name"] = "Living Room Sensor";
  temp_config["device"]["manufacturer"] = "DIY";
  temp_config["device"]["model"] = "ESP8266+DHT11";
  
  char temp_config_message[512];
  serializeJson(temp_config, temp_config_message);
  client.publish(temp_config_topic, temp_config_message, true);
​
  // Configuration for humidity sensor
  DynamicJsonDocument hum_config(512);
  hum_config["name"] = "Living Room Humidity";
  hum_config["device_class"] = "humidity";
  hum_config["state_topic"] = state_topic;
  hum_config["unit_of_measurement"] = "%";
  hum_config["value_template"] = "{{ value_json.humidity }}";
  hum_config["unique_id"] = String(device_id) + "_humidity";
  hum_config["device"] = temp_config["device"]; // Same device info
  
  char hum_config_message[512];
  serializeJson(hum_config, hum_config_message);
  client.publish(hum_config_topic, hum_config_message, true);
}
​
void setup() {
  Serial.begin(115200);
  dht.begin();
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}
​
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
​
  delay(2000); // Wait between measurements
​
  float h = dht.readHumidity();
  float t = dht.readTemperature();
​
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
​
  // Create JSON payload
  DynamicJsonDocument doc(256);
  doc["temperature"] = t;
  doc["humidity"] = h;
​
  char json_string[256];
  serializeJson(doc, json_string);
  
  Serial.print("Publishing: ");
  Serial.println(json_string);
  
  client.publish(state_topic, json_string, true);
}

固件烧录

• Type-C 数据线连接开发板和电脑，按住 BOOT 键的同时，短按 RST 键，进入下载模式；
• Arduino IDE 构建工程 - 选择目标串口对应的端口号 - 上传工程

YAML 文件

home assistant 配置文件添加如下代码

mqtt:
  sensor:
    - name: "Temperature"
      state_topic: "home/sensor/"
      suggested_display_precision: 2
      unit_of_measurement: "C"
      value_template: "{{ value_json.temperature }}"
    - name: "Humidity"
      state_topic: "home/sensor/"
      suggested_display_precision: 2
      unit_of_measurement: "%"
      value_template: "{{ value_json.humidity }}"

效果

========== 2025年4月20日更新 ==============

• 新增 DS18B20 模块 IIC 四引脚接口设计；
• 固件更新，支持 MQTT 数据上传，Home Assistant实时监测，同时 OLED 显示；

代码见附件；

测试效果见视频。