From 115821d26996d05044dd3ebdd1ffa3b286d8c85f Mon Sep 17 00:00:00 2001
From: Joe Robinson <joe@lc8n.com>
Date: Sat, 16 Feb 2019 23:36:21 +0000
Subject: Initial commit

---
 README.md   |  6 +++++
 cricket.ino | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 README.md
 create mode 100644 cricket.ino

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cba7177
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+Publishes DHT sensor readings over MQTT from an Arduino/ESP8266/D1 mini
+
+ESP8266 Board Packagee: http://arduino.esp8266.com/versions/2.3.0/package_esp8266com_index.json
+Adafruit DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
+MQTT PubSubClient: https://github.com/knolleary/pubsubclient
+
diff --git a/cricket.ino b/cricket.ino
new file mode 100644
index 0000000..7979c61
--- /dev/null
+++ b/cricket.ino
@@ -0,0 +1,85 @@
+//D1 mini / ESP8266 Board: http://arduino.esp8266.com/versions/2.3.0/package_esp8266com_index.json
+
+#include "DHT.h" //https://github.com/adafruit/DHT-sensor-library
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h> //https://github.com/knolleary/pubsubclient
+
+#define WIFI_SSID "SSID"
+#define WIFI_PASS "PASS"
+WiFiClient wifiClient;
+
+#define MQTT_ID "cricket0"
+#define MQTT_BROKER "BROKER"
+PubSubClient mqttClient(wifiClient);
+
+#define DHTPIN 5 //Pin D1
+#define DHTTYPE DHT22 //Temp and Humidity Sensor
+DHT dht(DHTPIN, DHTTYPE);
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Initialised...");
+  connectWifi();
+  delay(1000);
+  dht.begin();
+}
+
+void connectWifi() {
+  delay(200);
+  Serial.print("Connecting to WiFi: ");
+  Serial.println(WIFI_SSID);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(WIFI_SSID, WIFI_PASS);
+
+  while(WiFi.status() != WL_CONNECTED) {
+    delay(150);
+    Serial.print(".");
+  }
+  
+  Serial.println();
+  Serial.println("WiFi: Connected");
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+  Serial.print("MAC address: ");
+  Serial.println(WiFi.macAddress());
+}
+
+void connectMqtt() {
+  Serial.print("Connecting to MQTT: ");
+  Serial.println(MQTT_BROKER);
+  while (!mqttClient.connected()) {
+    mqttClient.setServer(MQTT_BROKER, 1883);
+    if (mqttClient.connect(MQTT_ID)) {
+      Serial.println("Connected");
+    } else {
+      Serial.print(".");
+    }
+    delay(150);
+  }
+}
+
+void loop() {
+  delay(1500);
+  float h = dht.readHumidity();
+  float t = dht.readTemperature();
+
+  char t_msg[20];
+  char h_msg[20];
+  // Check if any reads failed and exit early (to try again).
+  if (isnan(h) || isnan(t)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return;
+  }
+  Serial.print("Humidity: ");
+  Serial.print(h);
+  Serial.print("   Temperature: ");
+  Serial.println(t);
+
+  if(!mqttClient.connected()) {
+    connectMqtt();
+  }
+  dtostrf(t, 1, 2, t_msg);
+  mqttClient.publish("temperature", t_msg);
+  dtostrf(h, 1, 2, h_msg);
+  mqttClient.publish("humidity", h_msg);
+}
-- 
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