SomfyDuino：Arduino Nano 实现 USB 转 Somfy IO 适配器

组件与物料

所需工具

• 电烙铁

项目简介

将 Somfy IO 卷帘窗遥控器与 Arduino Nano 结合，通过 USB 串口接入自建智能家居系统，无需厂商云网关。遥控器由 Arduino 供电（发射约 20mA），需拆除原电池。

接线说明

遥控器按键焊点分别接 Arduino 数字引脚（低电平触发）：

• PROG → D8
• UP → D12
• DOWN → D10
• MY → D11
• SELECT → D9

共用正极接 3.3V/GND。单通道遥控器无额外通道 LED，SELECT 键无法切换通道但不影响使用。

通信协议

Arduino 监听串口字符命令：

• u - 准备按下 UP
• d - 准备按下 DOWN
• m - 准备按下 MY
• p - 准备按下 PROG
• s - 准备按下 SELECT
• 1-9 - 增加按住时间 (×100ms)
• r - 增加重复发送次数
• e - 执行组合按键

示例：u5e = 按住 UP 500ms；ud9993e = 同时按 UP+DOWN 3秒（配对模式）。

代码

// SomfyDuino by Bjoern Foldenauer
int progPin = 8, upPin = 12, downPin = 10, myPin = 11, selectPin = 9, ledPin = 13;
boolean upPress=false, downPress=false, myPress=false, progPress=false, selectPress=false;
unsigned long holdTime = 0;
int repeatSend = 0;
char incomingChar;

void setup() {
  Serial.begin(9600);
  Serial.println("SomfyDuino 0.71");
  Serial.println("Commands: u/d/m/p/s + 1-9(hold) + r(repeat) + e(execute)");
  pinMode(progPin, OUTPUT); pinMode(upPin, OUTPUT); pinMode(downPin, OUTPUT);
  pinMode(myPin, OUTPUT); pinMode(selectPin, OUTPUT); pinMode(ledPin, OUTPUT);
  digitalWrite(progPin, HIGH); digitalWrite(upPin, HIGH); digitalWrite(downPin, HIGH);
  digitalWrite(myPin, HIGH); digitalWrite(selectPin, HIGH); digitalWrite(ledPin, LOW);
}

void loop() {
  while (Serial.available() == 0) delay(50);
  if (Serial.available() > 0) {
    incomingChar = Serial.read();
    if (incomingChar == 'u') upPress = true;
    if (incomingChar == 'd') downPress = true;
    if (incomingChar == 'm') myPress = true;
    if (incomingChar == 'p') progPress = true;
    if (incomingChar == 's') selectPress = true;
    if (incomingChar >= '1' && incomingChar <= '9') holdTime += (incomingChar - '0') * 100;
    if (incomingChar == 'r') repeatSend++;
    if (incomingChar == 'e') somSend();
  }
}

void somSend() {
  for (int i = 0; i <= repeatSend; i++) {
    if (upPress) { digitalWrite(upPin, LOW); Serial.print("up "); }
    if (downPress) { digitalWrite(downPin, LOW); Serial.print("down "); }
    if (myPress) { digitalWrite(myPin, LOW); Serial.print("my "); }
    if (progPress) { digitalWrite(progPin, LOW); Serial.print("prog "); }
    if (selectPress) { digitalWrite(selectPin, LOW); Serial.print("select "); }
    digitalWrite(ledPin, HIGH);
    Serial.print("for "); Serial.print(holdTime); Serial.println(" ms");
    delay(holdTime);
    digitalWrite(progPin, HIGH); digitalWrite(upPin, HIGH); digitalWrite(downPin, HIGH);
    digitalWrite(myPin, HIGH); digitalWrite(selectPin, HIGH); digitalWrite(ledPin, LOW);
    delay(holdTime);
  }
  upPress=downPress=myPress=progPress=selectPress=false; holdTime=0; repeatSend=0;
  Serial.println("done.");
}

原理图