From 30dda4427d70d350d8e1df0a0550ff9a34cc4e10 Mon Sep 17 00:00:00 2001
From: Sam Rolfe <samuelrolfe@gmail.com>
Date: Fri, 25 Sep 2026 20:39:35 +1000
Subject: [PATCH] Initial commit (secrets isolated)

---
 .gitignore           |   8 +++
 LoraMqttWatering.ino | 116 +++++++++++++++++++++++++++++++++++++++++++
 secrets.h.example    |   9 ++++
 3 files changed, 133 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 LoraMqttWatering.ino
 create mode 100644 secrets.h.example

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d7f308a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+secrets.h
+.pio/
+build/
+.vscode/
+.idea/
+*.bin
+*.elf
+*.hex
diff --git a/LoraMqttWatering.ino b/LoraMqttWatering.ino
new file mode 100755
index 0000000..2fb5dfd
--- /dev/null
+++ b/LoraMqttWatering.ino
@@ -0,0 +1,116 @@
+#include "secrets.h"
+#include <WiFi.h>
+#include <PubSubClient.h>
+#include <HardwareSerial.h>
+
+// WiFi Credentials
+const char* ssid = SECRET_WIFI_SSID;
+const char* password = SECRET_WIFI_PASS;
+
+// MQTT Broker
+const char* mqtt_server = "192.168.20.30";
+const char* mqtt_user = SECRET_MQTT_USER;
+const char* password = SECRET_WIFI_PASS;
+
+// MQTT Topics
+const char* mqtt_topic = "homeassistant/ESP32/control";
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+// Define different Serial port for LoRa communication
+#define LORA_UART Serial2
+#define LORA_TX_PIN 17  // GPIO17 for TX
+#define LORA_RX_PIN 16  // GPIO16 for RX
+
+void setup_wifi() {
+  delay(10);
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void callback(char* topic, byte* message, unsigned int length) {
+  Serial.print("Message arrived on topic: ");
+  Serial.print(topic);
+  Serial.print(". Message: ");
+  String messageTemp;
+  
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)message[i]);
+    messageTemp += (char)message[i];
+  }
+  Serial.println();
+
+  // Handle incoming MQTT messages and send via LoRa
+  if (String(topic) == mqtt_topic) {
+    LORA_UART.print(messageTemp);
+    Serial.println("Sent via LoRa: " + messageTemp);
+  }
+}
+
+void reconnect() {
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    if (client.connect("ESP32Client", mqtt_user, mqtt_password)) {
+      Serial.println("connected");
+      client.subscribe(mqtt_topic);
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      delay(5000);
+    }
+  }
+}
+
+void setup() {
+  Serial.begin(115200);  // Main serial for debugging
+  LORA_UART.begin(9600, SERIAL_8N1, LORA_RX_PIN, LORA_TX_PIN);  // Initialize UART for LoRa
+
+  if (LORA_UART) {
+    Serial.println("LoRa Transmitter Initialized");
+  } else {
+    Serial.println("LoRa Transmitter Initialization Failed");
+  }
+
+  setup_wifi();
+  client.setServer(mqtt_server, 1883);
+  client.setCallback(callback);
+}
+
+void loop() {
+  if (!client.connected()) {
+    reconnect();
+  }
+  client.loop();
+
+  // Check for Serial Monitor command
+  if (Serial.available()) {
+    String command = Serial.readStringUntil('\n');
+    command.trim();  // Remove any extra whitespace
+
+    if (command == "restart") {
+      Serial.println("Restarting Transmitter...");
+      delay(1000);  // Give time for message to print
+      ESP.restart();
+    } else {
+      LORA_UART.print(command);
+      Serial.println("Sent via LoRa: " + command);
+    }
+  }
+
+  delay(1000);  // Add a delay to avoid watchdog timer reset
+}
diff --git a/secrets.h.example b/secrets.h.example
new file mode 100644
index 0000000..5ff32d1
--- /dev/null
+++ b/secrets.h.example
@@ -0,0 +1,9 @@
+#ifndef SECRETS_H
+#define SECRETS_H
+
+#define SECRET_WIFI_SSID "YOUR_WIFI_SSID"
+#define SECRET_WIFI_PASS "YOUR_WIFI_PASSWORD"
+#define SECRET_MQTT_USER "YOUR_MQTT_USERNAME"
+#define SECRET_MQTT_PASS "YOUR_MQTT_PASSWORD"
+
+#endif