Configuration changes, using ArduinoJson for AJAX responses, EmonLiteESP with custom reading callbacks

code/src/Config.cpp

@@ -0,0 +1,89 @@
+/*
+  Config
+
+  Configuration file
+*/
+
+#include "Config.h"
+#include "FS.h"
+
+bool ConfigClass::save() {
+    File file = SPIFFS.open(CONFIG_PATH, "w");
+    if (file) {
+
+        file.println("hostname=" + hostname);
+        file.println("ssid0=" + ssid[0]);
+        file.println("pass0=" + pass[0]);
+        file.println("ssid1=" + ssid[1]);
+        file.println("pass1=" + pass[1]);
+        file.println("ssid2=" + ssid[2]);
+        file.println("pass2=" + pass[2]);
+        file.println("mqttServer=" + mqttServer);
+        file.println("mqttPort=" + mqttPort);
+        file.println("mqttTopic=" + mqttTopic);
+        file.println("rfChannel=" + rfChannel);
+        file.println("rfDevice=" + rfDevice);
+        file.println("otaServer=" + otaServer);
+        file.println("otaInterval=" + otaInterval);
+        file.println("pwMainsVoltage=" + pwMainsVoltage);
+        file.println("pwCurrentRatio=" + pwCurrentRatio);
+
+        file.close();
+        return true;
+    }
+    return false;
+}
+
+bool ConfigClass::load() {
+
+    if (SPIFFS.exists(CONFIG_PATH)) {
+
+        #ifdef DEBUG
+            Serial.println("Reading config file");
+        #endif
+
+        // Read contents
+        File file = SPIFFS.open(CONFIG_PATH, "r");
+        String content = file.readString();
+        file.close();
+
+        // Parse contents
+        content.replace("\r\n", "\n");
+        content.replace("\r", "\n");
+
+        int start = 0;
+        int end = content.indexOf("\n", start);
+        while (end > 0) {
+
+            String line = content.substring(start, end);
+
+            if (line.startsWith("hostname=")) hostname = line.substring(9);
+            else if (line.startsWith("ssid0=")) ssid[0] = line.substring(6);
+            else if (line.startsWith("pass0=")) pass[0] = line.substring(6);
+            else if (line.startsWith("ssid1=")) ssid[1] = line.substring(6);
+            else if (line.startsWith("pass1=")) pass[1] = line.substring(6);
+            else if (line.startsWith("ssid2=")) ssid[2] = line.substring(6);
+            else if (line.startsWith("pass2=")) pass[2] = line.substring(6);
+            else if (line.startsWith("mqttServer=")) mqttServer = line.substring(11);
+            else if (line.startsWith("mqttPort=")) mqttPort = line.substring(9);
+            else if (line.startsWith("mqttTopic=")) mqttTopic = line.substring(10);
+            else if (line.startsWith("rfChannel=")) rfChannel = line.substring(10);
+            else if (line.startsWith("rfDevice=")) rfDevice = line.substring(9);
+            else if (line.startsWith("otaServer=")) otaServer = line.substring(10);
+            else if (line.startsWith("otaInterval=")) otaInterval = line.substring(12);
+            else if (line.startsWith("pwMainsVoltage=")) pwMainsVoltage = line.substring(15);
+            else if (line.startsWith("pwCurrentRatio=")) pwCurrentRatio = line.substring(15);
+
+            if (end < 0) break;
+            start = end + 1;
+            end = content.indexOf("\n", start);
+
+        }
+
+        return true;
+    }
+    return false;
+
+}
+
+ConfigClass config;

code/src/Config.h

@@ -0,0 +1,68 @@
+/*
+  Config
+
+  Configuration file
+*/
+
+#ifndef Config_h
+#define Config_h
+
+#include "Arduino.h"
+
+// -----------------------------------------------------------------------------
+// Defaults
+// -----------------------------------------------------------------------------
+
+#define CONFIG_PATH         "/.config"
+
+#define NETWORK_BUFFER      3
+
+#define MQTT_SERVER         "192.168.1.100"
+#define MQTT_PORT           1883
+#define MQTT_TOPIC          "/test/switch/{identifier}"
+
+#define AUTOOTA_SERVER      "http://192.168.1.100"
+#define AUTOOTA_INTERVAL    600000
+
+#define MAINS_VOLTAGE       230
+#define CURRENT_RATIO       156
+
+#define RF_CHANNEL          31
+#define RF_DEVICE           1
+
+// -----------------------------------------------------------------------------
+// Class definition
+// -----------------------------------------------------------------------------
+
+class ConfigClass {
+
+    public:
+
+        String hostname;
+
+        String ssid[NETWORK_BUFFER];
+        String pass[NETWORK_BUFFER];
+
+        String mqttServer = MQTT_SERVER;
+        String mqttPort = String(MQTT_PORT);
+        String mqttTopic = MQTT_TOPIC;
+        String mqttUser = "";
+        String mqttPassword = "";
+
+        String rfChannel = String(RF_CHANNEL);
+        String rfDevice = String(RF_DEVICE);
+
+        String otaServer = String(AUTOOTA_SERVER);
+        String otaInterval = String(AUTOOTA_INTERVAL);
+
+        String pwMainsVoltage = String(MAINS_VOLTAGE);
+        String pwCurrentRatio = String(CURRENT_RATIO);
+
+        bool save();
+        bool load();
+
+};
+
+extern ConfigClass config;
+
+#endif