From bc7899ed349691cc12f4f8220355c8b563a2ca08 Mon Sep 17 00:00:00 2001
From: David Zalesak <dz@pixx.cz>
Date: Thu, 15 Dec 2022 13:15:22 +0100
Subject: [PATCH] initial commit

---
 .gitignore        |   1 +
 ESPelektromer.ino | 121 ++++++++++++++++++++++++++++++++++++++++++++++
 config.h.example  |  10 ++++
 3 files changed, 132 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 ESPelektromer.ino
 create mode 100644 config.h.example

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0e56cf2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+config.h
diff --git a/ESPelektromer.ino b/ESPelektromer.ino
new file mode 100644
index 0000000..9f028dc
--- /dev/null
+++ b/ESPelektromer.ino
@@ -0,0 +1,121 @@
+//========== Preprocesor ==========
+
+//---- Required ----
+#include <ESP8266WiFi.h>
+#include <ArduinoOTA.h>
+//------------------
+#include <ESPAsyncTCP.h>
+#include <ESPAsyncWebServer.h>
+
+#include "Tasker.h"
+
+#include "config.h"
+
+//========== Create objects ==========
+
+AsyncWebServer server(80);
+Tasker tasker;
+
+//========== Init variables ==========
+
+int electricityTotal = 0;
+int gasTotal = 0;
+String metrics = "electricity 0\ngas 0";
+unsigned long lastElectricityInterruptTime;
+unsigned long lastGasInterruptTime;
+
+//=================================
+
+
+void setup() {
+//========== Wi-Fi setup ==========
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(STASSID, STAPSK);
+  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
+    //Connection Failed! Rebooting...
+    delay(5000);
+    ESP.restart();
+  }
+
+//========== OTA setup ==========
+
+  // Port defaults to 8266
+  // ArduinoOTA.setPort(8266);
+
+  // Hostname defaults to esp8266-[ChipID]
+  // ArduinoOTA.setHostname("myesp8266");
+
+  // No authentication by default
+  // ArduinoOTA.setPassword("admin");
+
+  // Password can be set with it's md5 value as well
+  // MD5(admin) = 21232f297a57a5a743894a0e4a801fc3
+  // ArduinoOTA.setPasswordHash("21232f297a57a5a743894a0e4a801fc3");
+  ArduinoOTA.begin();
+  SPIFFS.begin();
+
+//========== Pin setup ==========
+
+  pinMode(ELECTRICITY, INPUT);
+  pinMode(GAS, INPUT);
+  attachInterrupt(digitalPinToInterrupt(ELECTRICITY), electricityIn, FALLING);
+  attachInterrupt(digitalPinToInterrupt(GAS), gasIn, FALLING);
+  pinMode(LED_PIN, OUTPUT);
+  digitalWrite(LED_PIN, HIGH);
+
+//========== Tasks init ==========
+
+  tasker.setInterval(otaHandle, 1000);
+
+//========== Web server setup ==========
+
+  if(METRICS_EXPORT){
+    server.on("/metrics", HTTP_GET, [](AsyncWebServerRequest *request){
+      //tasker.setTimeout(ledBlink, 10);
+      request->send(200, "text/plain; charset=utf-8", metrics);
+    });
+    server.onNotFound(notFound);
+    server.begin();
+  }
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  tasker.loop();
+}
+
+void otaHandle(){
+  ArduinoOTA.handle();
+}
+
+void notFound(AsyncWebServerRequest *request) {
+  request->send(404, "text/plain", "Not found");
+}
+void ledBlink() {
+  digitalWrite(LED_PIN, LOW);
+  delay(200);
+  digitalWrite(LED_PIN, HIGH);
+}
+ICACHE_RAM_ATTR void electricityIn() {
+  unsigned long interruptTime = millis();
+  if (interruptTime - lastElectricityInterruptTime > 100) {
+    electricityTotal++;
+    metrics = "electricity ";
+    metrics += electricityTotal;
+    metrics += "\ngas ";
+    metrics += gasTotal;
+    lastElectricityInterruptTime = interruptTime;
+  }
+}
+ICACHE_RAM_ATTR void gasIn() {
+  unsigned long interruptTime = millis();
+  if (interruptTime - lastGasInterruptTime > 12000) {
+    gasTotal++;
+    metrics = "electricity ";
+    metrics += electricityTotal;
+    metrics += "\ngas ";
+    metrics += gasTotal;
+    lastGasInterruptTime = interruptTime;
+  }
+}
diff --git a/config.h.example b/config.h.example
new file mode 100644
index 0000000..2ea3d30
--- /dev/null
+++ b/config.h.example
@@ -0,0 +1,10 @@
+#define STASSID "SSID"
+##define STAPSK  "heslo"
+
+#define ELECTRICITY 2
+#define GAS 0
+
+//Light on power on, blink on request
+#define LED_PIN 1
+
+#define METRICS_EXPORT 1