Initial commit

README.md

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+#wemos-dht22

wemos-dht22.ino

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+#include <Homie.h>
+#include <DHT.h>
+
+#define FW_NAME       "wemos-dht"
+#define FW_VERSION    "0.0.3"
+
+/* Magic sequence for Autodetectable Binary Upload */
+const char *__FLAGGED_FW_NAME = "\xbf\x84\xe4\x13\x54" FW_NAME "\x93\x44\x6b\xa7\x75";
+const char *__FLAGGED_FW_VERSION = "\x6a\x3f\x3e\x0e\xe1" FW_VERSION "\xb0\x30\x48\xd4\x1a";
+/* End of magic sequence for Autodetectable Binary Upload */
+
+#define DHT_PIN       D4
+#define DHT_TYPE      DHT22
+#define PUB_INTERVAL  60
+
+HomieNode temperatureNode("temperature", "temperature");
+HomieNode humidityNode("humidity", "humidity");
+
+DHT dht(DHT_PIN, DHT_TYPE);
+
+unsigned long lastPublish = 0;
+
+void setupHandler() {
+  Homie.setNodeProperty(temperatureNode, "unit", "c", true);
+  Homie.setNodeProperty(humidityNode, "unit", "%", true);
+
+  dht.begin();
+}
+
+void loopHandler() {
+  if (millis() - lastPublish >= PUB_INTERVAL * 1000UL) {
+    float t = dht.readTemperature();
+    float h = dht.readHumidity();
+
+    if (!isnan(t) && Homie.setNodeProperty(temperatureNode, "degrees", String(t), true)) {
+      lastPublish = millis();
+    }
+    if (!isnan(h) && Homie.setNodeProperty(humidityNode, "relative", String(h), true)) {
+      lastPublish = millis();
+    }
+  }
+}
+
+void setup() {
+  Homie.setFirmware(FW_NAME, FW_VERSION);
+
+  Homie.registerNode(temperatureNode);
+  Homie.registerNode(humidityNode);
+
+  Homie.setSetupFunction(setupHandler);
+  Homie.setLoopFunction(loopHandler);
+
+  Homie.enableBuiltInLedIndicator(false);  
+  Homie.setup();
+}
+
+void loop() {
+  Homie.loop();
+}