Global change

bus.ino

@@ -0,0 +1,33 @@
+void do_i2c_scanning() {
+  if (i2c_scanning) {
+    i2c_scanning = false;
+    String tmp = i2c_scan();
+    if (tmp == "error") {
+      tmp = i2c_scan();
+      Serial.println(tmp);
+      jsonWriteStr(configJson, "i2c", tmp);
+    } else {
+      Serial.println(tmp);
+      jsonWriteStr(configJson, "i2c", tmp);
+    }
+  }
+}
+
+String i2c_scan() {
+  String out;
+  byte count = 0;
+  Wire.begin();
+  for (byte i = 8; i < 120; i++) {
+    Wire.beginTransmission(i);
+    if (Wire.endTransmission() == 0) {
+      count++;
+      out += String(count) + ". 0x" + String(i, HEX) + "; ";
+      delay(1);
+    }
+  }
+  if (count == 0) {
+    return "error";
+  } else {
+    return out;
+  }
+}