Initial commit

.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

@@ -0,0 +1,19 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:d1_mini]
+platform = espressif8266
+board = d1_mini
+framework = arduino
+lib_deps = 
+    bblanchon/ArduinoJson @ 6.21.3
+    pubsubclient @ 2.8
+    arduino-libraries/NTPClient@^3.2.1
+monitor_speed = 115200

src/main.cpp

@@ -0,0 +1,190 @@
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <NTPClient.h>
+#include <WiFiUdp.h>
+#include <ArduinoJson.h>
+#include <EEPROM.h>
+
+// Hardware Configuration
+#define REED_PIN D3  // GPIO0 (mit internem Pullup)
+const float PULSES_PER_M3 = 100.0; // Anpassen an Ihren Gaszähler
+
+// Network Credentials
+const char* SSID = "pipanet";
+const char* PASS = "passatvr6";
+
+// MQTT Configuration
+const char* MQTT_SERVER = "192.168.2.173";
+const char* STATE_TOPIC = "homeassistant/sensor/gas_meter/state";
+const char* COMMAND_TOPIC = "homeassistant/sensor/gas_meter/set";
+const char* CONFIG_TOPIC = "homeassistant/sensor/gas_meter/config";
+const char* AVAILABILITY_TOPIC = "homeassistant/sensor/gas_meter/status";
+
+// Global Variables
+volatile unsigned long totalPulses = 0;
+volatile unsigned long dailyPulses = 0;
+volatile bool reedState = false;
+volatile unsigned long lastDebounce = 0;
+const unsigned long DEBOUNCE_MS = 50;
+
+// Objects
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP, "pool.ntp.org");
+WiFiClient wifiClient;
+PubSubClient mqtt(wifiClient);
+
+void saveData() {
+  EEPROM.put(0, totalPulses);
+  EEPROM.put(sizeof(totalPulses), dailyPulses);
+  EEPROM.commit();
+}
+
+void loadData() {
+  EEPROM.begin(64);
+  EEPROM.get(0, totalPulses);
+  EEPROM.get(sizeof(totalPulses), dailyPulses);
+}
+
+void ICACHE_RAM_ATTR handleInterrupt() {
+  if (millis() - lastDebounce > DEBOUNCE_MS) {
+    bool currentState = digitalRead(REED_PIN);
+    if (currentState != reedState) {
+      if (currentState == LOW) {
+        totalPulses++;
+        dailyPulses++;
+        saveData();
+      }
+      reedState = currentState;
+      lastDebounce = millis();
+    }
+  }
+}
+
+void sendConfig() {
+  StaticJsonDocument<256> doc;
+  doc["name"] = "Gas Meter";
+  doc["dev_cla"] = "gas";
+  doc["stat_t"] = STATE_TOPIC;
+  doc["cmd_t"] = COMMAND_TOPIC;
+  doc["unit_of_meas"] = "m³";
+  doc["stat_cla"] = "total_increasing";
+  doc["val_tpl"] = "{{ value_json.total_m3 }}";
+  doc["avty_t"] = AVAILABILITY_TOPIC;
+  doc["pl_avail"] = "online";
+  doc["pl_not_avail"] = "offline";
+  doc["uniq_id"] = "gas_meter_" + String(ESP.getChipId(), HEX);
+
+  char config[256];
+  serializeJson(doc, config);
+  mqtt.publish(CONFIG_TOPIC, config, true);
+}
+
+void sendData() {
+  StaticJsonDocument<200> doc;
+  doc["total_m3"] = totalPulses / PULSES_PER_M3;
+  doc["daily_m3"] = dailyPulses / PULSES_PER_M3;
+  doc["total_pulses"] = totalPulses;
+  doc["timestamp"] = timeClient.getFormattedTime();
+
+  char output[200];
+  serializeJson(doc, output);
+  mqtt.publish(STATE_TOPIC, output, true);
+  
+  Serial.printf("Sent: Total=%.1fm³, Daily=%.1fm³, Pulses=%lu\n",
+               totalPulses/PULSES_PER_M3,
+               dailyPulses/PULSES_PER_M3,
+               totalPulses);
+}
+
+void mqttCallback(char* topic, byte* payload, unsigned int length) {
+  String message;
+  for (unsigned int i = 0; i < length; i++) {
+    message += (char)payload[i];
+  }
+
+  if (String(topic) == COMMAND_TOPIC) {
+    if (message == "reset_total") {
+      totalPulses = 0;
+    } else if (message == "reset_daily") {
+      dailyPulses = 0;
+    }
+    saveData();
+    Serial.println("Counter reset via MQTT");
+  }
+}
+
+void reconnectMQTT() {
+  static unsigned long lastAttempt = 0;
+  if (!mqtt.connected() && millis() - lastAttempt > 5000) {
+    Serial.println("Attempting MQTT connection...");
+    if (mqtt.connect("GasMeter", AVAILABILITY_TOPIC, 1, true, "offline")) {
+      mqtt.publish(AVAILABILITY_TOPIC, "online", true);
+      mqtt.subscribe(COMMAND_TOPIC);
+      sendConfig();
+      Serial.println("MQTT connected!");
+    } else {
+      Serial.println("MQTT connection failed");
+    }
+    lastAttempt = millis();
+  }
+}
+
+void checkDailyReset() {
+  static int lastDay = -1;
+  timeClient.update();
+  int currentDay = timeClient.getDay();
+  
+  if (lastDay != -1 && currentDay != lastDay) {
+    dailyPulses = 0;
+    saveData();
+    Serial.println("Daily counter reset");
+  }
+  lastDay = currentDay;
+}
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("\nBooting Gas Meter...");
+
+  // Load Data
+  EEPROM.begin(64);
+  loadData();
+  
+  // Reed Switch
+  pinMode(REED_PIN, INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(REED_PIN), handleInterrupt, CHANGE);
+  
+  // WiFi
+  WiFi.begin(SSID, PASS);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("\nWiFi connected");
+  
+  // NTP
+  timeClient.begin();
+  timeClient.update();
+  
+  // MQTT
+  mqtt.setServer(MQTT_SERVER, 1883);
+  mqtt.setCallback(mqttCallback);
+}
+
+void loop() {
+  static unsigned long lastSend = 0;
+  
+  timeClient.update();
+  mqtt.loop();
+  reconnectMQTT();
+  checkDailyReset();
+  
+  if (millis() - lastSend >= 30000) {
+    if (mqtt.connected()) {
+      sendData();
+    }
+    lastSend = millis();
+  }
+  
+  delay(10);
+}

src/otterpy.code-workspace

@@ -0,0 +1,12 @@
+{
+	"folders": [
+		{
+			"path": "../../../../docker/otterpy"
+		},
+		{
+			"name": "KY25_ESP8266",
+			"path": ".."
+		}
+	],
+	"settings": {}
+}

test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html