基于点灯科技的LoRa应用分享
本帖最后由 888123123 于 2022-9-28 11:05 编辑使用LoRaUNO采集SHT30温湿度数据通过是sx1278 LoRa模组发送到ESPLoRa单项网关，ESPLoRa单项网关获取到温湿度数据上传到点灯科技平台进行展示。可通过点灯科技平台进行数据下发开关指令控制电机和风扇，电机和风扇连接在ESPLoRa单项网关上，从而实现控制。
程序框图
硬件框图
接收端代码#define BLINKER_WIFI#define TEXTE_1 "TextKey"
#include <Blinker.h>#include <U8g2lib.h>#include <LoRa.h>#include <SPI.h>
char auth[] = "点灯科技KEY";char ssid[] = "wifi名称";char pswd[] = "wifi密码";
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R2, /* reset=*/U8X8_PIN_NONE, /* clock=*/22, /* data=*/21); // ESP32使用SCL:D22 SDA:D21
//开机画面---显示ESPLoRa图片const unsigned char bmp1[] U8X8_PROGMEM = { 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};
// 水泵开关BlinkerButton Button1("button");BlinkerButton Button2("fan");BlinkerText Text1("text1");BlinkerText Text2("text2");//传感器数据BlinkerNumber TEMP("temp");BlinkerNumber HUM("hum");BlinkerNumber RSS("rssi");
//Lora初始化 #define SS 5#define RST 14#define DI0 2#define BAND 433E6
//传感器初始化String temperature;String humidity; String RSSI;
float temp = 0, hum = 0, rssi = 0;
void setup(){ Serial.begin(9600); u8g2.begin(); check_lora(); //检查lora showStart(); //显示启动界面 pinMode(27, OUTPUT); pinMode(17, OUTPUT); pinMode(15, OUTPUT); digitalWrite(27, LOW);
Blinker.begin(auth, ssid, pswd);
LoRa.setSyncWord(0xA5); //可以设置信道（范围从0到0xFF）。 LoRa.setTxPower(20); Serial.println("LoRa Initializing OK!"); Button1.attach(button1_callback); Button2.attach(button2_callback); Blinker.attachHeartbeat(LORAMESSAGEDATA);//注册一个心跳包 BLINKER_DEBUG.stream(Serial); Blinker.attachDataStorage(dataStorage);}
void loop(){ Blinker.run();
Lora_packet(); //接收lora数据包
u8g2.setFont(u8g2_font_t0_17_tr); u8g2.clearBuffer(); u8g2.drawStr(0,14,"ESPLora Getway");//LORA---具体显示内容
u8g2.drawLine(1,18,126,18); //画一条平面直线
u8g2.drawStr(15,34,"Temp:"); u8g2.setCursor(63, 34);// u8g2.print(temp);
u8g2.drawStr(15,54,"Humi:"); u8g2.setCursor(63, 54); u8g2.print(hum); u8g2.sendBuffer();
}
void dataStorage(){ Blinker.dataStorage("temp", temp); Blinker.dataStorage("hum", hum); Blinker.dataStorage("rssi", rssi);}
// 水泵void button1_callback(const String & state) { BLINKER_LOG("get button state: ", state); if (state=="on") { digitalWrite(27, HIGH); digitalWrite(17, HIGH); Text1.print("已打开"); // 反馈开关状态 Button1.print("on"); } else if(state=="off"){ digitalWrite(27, LOW); digitalWrite(17, LOW); Text1.print("已关闭"); // 反馈开关状态 Button1.print("off"); }}//风扇void button2_callback(const String & state) { BLINKER_LOG("get button2 state: ", state); if (state=="on") { digitalWrite(15, HIGH); Text2.print("已打开"); // 反馈开关状态 Button2.print("on"); } else if(state=="off"){ digitalWrite(15, LOW); Text2.print("已关闭"); // 反馈开关状态 Button2.print("off"); }}
// 心跳包函数 void LORAMESSAGEDATA() {
TEMP.print(temp); HUM.print(hum); RSS.print(rssi); }
//显示启动动画void showStart() {u8g2.clearBuffer();u8g2.drawXBMP(0,0, 128, 64, bmp1);u8g2.sendBuffer();delay(3000);}
// 尝试解析数据包void Lora_packet(){int pos1; int packetSize = LoRa.parsePacket();if (packetSize) { // 如果收到包 String LoRaData = LoRa.readString(); //Serial.print(LoRaData); //读取数据包 while (LoRa.available()) { Serial.print((char)LoRa.read()); } //读取后开始拆包 pos1 = LoRaData.indexOf('/'); //解析后赋值变量
temperature = LoRaData.substring(0, pos1); humidity = LoRaData.substring(pos1 + 1, LoRaData.length()); RSSI = LoRa.packetRssi();
temp = temperature.toFloat(); hum= humidity.toFloat(); rssi = RSSI.toFloat(); TEMP.print(temp); HUM.print(hum); RSS.print(rssi); BLINKER_LOG(temperature); BLINKER_LOG(humidity); BLINKER_LOG(RSSI);}
}
//检查lora连接是否成功void check_lora(){while (!Serial);Serial.println("LoRa Receiver");LoRa.setPins(SS, RST, DI0);if (!LoRa.begin(BAND)) {Serial.println("Starting LoRa failed!"); while (1);}}
节点端代码/* oled屏幕声明屏幕分辨率修改分辨率需要到Adafruit_SSD1306.h库中修改 */
#include <LoRa.h>#include <SPI.h>#include <Arduino.h>#include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h>#include <Adafruit_SHT31.h> //lora模块声明#define BAND 433E6//Lora信号 String LoRaMessage = "";//声明发送信息
#define OLED_RESET-1 // 定义显示复位引脚Adafruit_SSD1306 display(OLED_RESET);//初始化Adafruit显示库
// //启动界面static const uint8_t PROGMEM Starbmp[] = 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};
//sht30地址声明Adafruit_SHT31 sht31 = Adafruit_SHT31();
unsigned long previousMillis = 0; // will store last time LED was updated
// constants won't change:const long interval = 3000; // interval at which to blink (milliseconds)
void setup(void){ delay(500); Serial.begin(9600);//串口比特率 pinMode(7, OUTPUT); Lora_begin();//输出lora模块 //使用I2C地址= 0x3C //初始化SSD1306 OLED显示器 display.begin(SSD1306_SWITCHCAPVCC, 0x3C);//需要提前声明地址
//开启动画display.clearDisplay(); // clears the screen and bufferdisplay.drawBitmap(0,0,Starbmp,128,64,WHITE);display.display();delay(2000);
//初始化BMP180传感器if (! sht31.begin(0x44)) { // Set to 0x45 for alternate i2c addr Serial.println("Couldn't find SHT31"); while (1) delay(1);}
display.clearDisplay(); display.setTextSize(1); display.setTextColor(WHITE, BLACK); display.setCursor(35, 0); display.print("LoRa Node"); display.display();
display.setCursor(10, 10); display.print("Tem:");
display.drawCircle(72, 10, 1, WHITE); display.setCursor(74, 10); display.print("C");
display.setCursor(10, 20); display.print("Hum:");
display.setCursor(74, 20); display.print("%");
display.setCursor(10, 30); display.print("Message:"); display.setCursor(60, 30); display.print("SHT30ok!"); display.setCursor(60, 40); display.print("LoRa ok!");
}
//初始化lora模块void Lora_begin(){ //初始化Lora while (!Serial); Serial.println("LoRa Sender");
//检查lora模块 if (!LoRa.begin(BAND)) { Serial.println("Starting LoRa failed!"); while (1); } //没有问题初始化lora发送通道 LoRa.setSyncWord(0xA5);//可以设置同步字（范围从0到0xFF）。 LoRa.setTxPower(20);//发射功率}
void loop(){ float t = sht31.readTemperature();float h = sht31.readHumidity();display.setCursor(38, 10);display.print(t);display.setCursor(38, 20);display.print(h);display.display();unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) { // save the last time you blinked the LED previousMillis = currentMillis; digitalWrite(7,!digitalRead(7)); LoRaMessage = String(t) + "/" + String(h); LoRa.beginPacket();//准备发送信息 LoRa.print(LoRaMessage);//发送数据 LoRa.endPacket();//发送完毕 Serial.print(F("LoRaMessage Sendersucc")); //温度信息 Serial.print(F("Temp = ")); Serial.print(t); Serial.println(F(" *C")); //气压信息 Serial.print(F("HUM = ")); Serial.print(h); Serial.println(F("%")); Serial.println();}
}
导入界面配置：
{¨version¨¨2.0.0¨¨config¨{¨headerColor¨¨transparent¨¨headerStyle¨¨dark¨¨background¨{¨img¨¨assets/img/headerbg.jpg¨¨isFull¨«}}¨dashboard¨|{¨type¨¨num¨¨t0¨¨温度¨¨ico¨¨fad fa-tachometer-alt-fast¨¨clr¨¨#FBA613¨¨min¨É¨max¨¢1c¨uni¨¨°C¨¨bg¨É¨cols¨Í¨rows¨Ë¨key¨¨temp¨´x´É´y´Ë¨speech¨|÷¨lstyle¨Ê}{ßCßDßE¨湿度¨ßGßHßI¨#076EEF¨ßKÉßLº0ßM´%´ßOÉßPÍßQËßR¨hum¨´x´Í´y´ËßT|÷ßUÊ}{ßC¨btn¨ßG¨fal fa-power-off¨¨mode¨ÊßE¨开启水泵¨¨t1¨¨文本2¨ßOÉßPËßQËßR¨button¨´x´É´y´ÍßT|÷ßUÊßIßW}{ßC¨tex¨ßE´´ßc¨水泵状态¨¨size¨¤EßOÉßG¨fad fa-faucet-drip¨ßPÍßQËßR¨text1¨´x´Ë´y´ÍßT|÷ßUÌßIßW}{ßC¨cha¨ßOɨsty¨¨line¨ßIßJ¨sty1¨ßm¨clr1¨ßW¨sty2¨ßm¨clr2¨¨#00A90C¨ßPÑßQÌßRßS´x´É´y´ÑßT|÷ßUÉßE¨温度趋势¨¨key0¨ßS¨key1¨´´ßc´´¨key2¨´´¨t2¨´´}{ßCßfßE¨基于EspLoRa温湿度检测¨ßc´´ßh¤EßOÉßG¨far fa-house¨ßPÑßQËßR¨tex-brb¨´x´É´y´ÉßT|÷ßUÏßI¨#EA0909¨}{ßCßfßE´正常´ßc¨工作状态¨ßh¤EßOÉßG¨fad fa-siren¨ßPËßQËßR¨tex-ad0¨´x´Ï´y´ÏßT|÷ßUËßIßr}{ßCßDßE¨RSSI¨ßG¨fad fa-signal¨ßI¨#6010E4¨ßKÉßLº0ßM´dB´ßOÉßPËßQËßR¨rssi¨´x´Ï´y´ÍßT|÷ßUÉ}{ßCßYßGßZßaÊßE¨排风扇¨ßcßdßOÉßPËßQËßR¨fan¨´x´É´y´ÏßT|÷ßUÊßIßr}{ßCßfßE´´ßc¨风扇状态¨ßh¤EßOÉßG¨fad fa-fan-table¨ßPÍßQËßR¨text2¨´x´Ë´y´ÏßT|÷ßUÌßIßr}{ßCßkßOÉßlßmßIßWßnßmßo¨#595959¨ßpßmßq¨#389BEE¨ßPÑßQÌßRßX´x´É´y´¤BßT|÷ßtßXßE¨湿度曲线¨ßUÉ}{ßC¨deb¨ßaÉßOÉßPÑßQÌßR¨debug¨´x´É´y´¤E}÷¨actions¨|÷¨triggers¨|¦¨range¨¨source¨¨source_zh¨¨unit¨‡|ɺ0÷ßSßF´℃´|ɺ0÷ßXßV´%´—{ß1Lßeß1M¨开关状态¨¨state¨|´on´¨off¨÷¨state_zh¨|´开启´´关闭´÷}÷´rt´|÷}
B站视频演示：https://www.bilibili.com/video/BV1ee4y197V4/?spm_id_from=333.999.0.0&vd_source=446f9a5257a45be18ced68a9c54da1ad
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