switched mqtt client; implemented persistence

platformio.ini

@@ -21,6 +21,7 @@ lib_deps =
   AutoConnect@^1.1.7
   AsyncMqttClient@^0.8.2
   ArduinoJson@^6.15.2
-  MQTT@^2.4.7
-  ; PubSubClient@^2.8
+  ; MQTT@^2.4.7
+  PubSubClient@^2.8
+  ArduinoNvs@^2.5
   ; ESPRandom@^1.3.3

src/connections.cpp

@@ -1,5 +1,6 @@
 #include <ArduinoJson.h>
-#include <MQTT.h>
+// #include <MQTT.h>
+#include <PubSubClient.h>
 #include <header.h>
 
 extern "C" {
@@ -23,7 +24,8 @@ WiFiClient client;
 AutoConnectConfig Config;
 // Config.autoReconnect = true;
 // WiFi.config(Config);
-MQTTClient mqttClient;
+// MQTTClient mqttClient;
+PubSubClient mqttClient(client);
 
 void connectWiFi() {
   Serial.println("Start WiFi...");
@@ -33,15 +35,15 @@ void connectWiFi() {
 }
 
 void mqttLoop(void *parameter) {
-  bool x;
   do {
-    x = mqttClient.loop();
+    mqttClient.loop();
     delay(50);
   } while (mqttClient.connected());
-
+  Serial.println("Disconnected from MQTT.");
   if (!mqttClient.connected()) {
-    Serial.println("Disconnected from MQTT.");
+    Serial.println("Checking WiFi Connection.");
     if (WiFi.isConnected()) {
+      Serial.println("Starting reconnect timer for MQTT.");
       xTimerStart(mqttReconnectTimer, 0);
     }
   }
@@ -50,14 +52,15 @@ void mqttLoop(void *parameter) {
 
 void connectMQTT() {
   Serial.println("Connecting to MQTT...");
-  mqttClient.begin(MQTT_HOST, MQTT_PORT, client);
+  // mqttClient.begin(MQTT_HOST, MQTT_PORT, client);
+  mqttClient.setServer(MQTT_HOST, MQTT_PORT);
   mqttClient.connect(MQTT_DEVICE_ID);
   if (mqttClient.connected()) {
     Serial.println("Connected!");
   } else {
     Serial.println("NOT Connected!");
   }
-  mqttClient.subscribe(MQTT_PATH_SUB, 2);
+  mqttClient.subscribe(MQTT_PATH_SUB);
   Serial.print("subscribed to: ");
   Serial.println(MQTT_PATH_SUB);
   xTaskCreate(
@@ -88,7 +91,8 @@ void WiFiEvent(WiFiEvent_t event) {
   }
 }
 
-void onMqttMessage(MQTTClient *client, char topic[], char payload[], int payload_length) {
+// void onMqttMessage(MQTTClient *client, char topic[], char payload[], int payload_length) {
+void onMqttMessage(char *topic, byte *payload, unsigned int payload_length) {
   Serial.print("Message arrived [");
   Serial.print(topic);
   Serial.print("] ");
@@ -105,7 +109,8 @@ void onMqttMessage(MQTTClient *client, char topic[], char payload[], int payload
   if (strcmp(topic, MQTT_SOIL_PROPERTIES) == 0) {
     Serial.println("receiving soil thresholds...");
     Serial.println(topic);
-    Serial.println(payload);
+    //Serial.println(reinterpret_cast<const char *>(payload));
+    // Serial.println(payload);
     // const int capacity = JSON_OBJECT_SIZE(3) + 2 * JSON_OBJECT_SIZE(1);
     StaticJsonDocument<1024> doc;
     DeserializationError err = deserializeJson(doc, payload);
@@ -133,11 +138,13 @@ void setupConnections() {
 
   WiFi.onEvent(WiFiEvent);
 
-  mqttClient.onMessageAdvanced(onMqttMessage);
+  // mqttClient.onMessageAdvanced(onMqttMessage);
+  mqttClient.setCallback(onMqttMessage);
 
   connectWiFi();
 }
 
 void publishMessage(const char *topic, const char *msg) {
-  mqttClient.publish(topic, msg, true, 1);
+  mqttClient.publish(topic, msg);
+  // mqttClient.publish(topic, msg, true, 1);
 }

src/header.h

@@ -74,4 +74,5 @@ extern void publishMessage(const char *topic, const char *msg);
 // sensors
 void readSensors();
 void toggleValve();
-void setSoilProperties(int FC, int PWP, int SAT);
+void setSoilProperties(int FC, int PWP, int SAT);
+void setupStore();

src/main.cpp

@@ -20,6 +20,7 @@ void setup() {
 
   digitalWrite(PIN_VALVE, LOW);
 
+  setupStore();
   setupConnections();
   setupLightSensor();
   setupTemperatureSensor();

src/peripherals.cpp

@@ -1,4 +1,5 @@
 #include <header.h>
+#include <ArduinoNvs.h>
 
 #include <string>
 //using namespace std;
@@ -85,21 +86,60 @@ void toggleValve() {
   xTaskCreate(
       valveTask,   /* Task function. */
       "valveTask", /* String with name of task. */
-      10000,       /* Stack size in bytes. */
+      512,       /* Stack size in bytes. */
       NULL,        /* Parameter passed as input of the task */
       1,           /* Priority of the task. */
       NULL);       /* Task handle. */
 }
 
+void persistSoilProps(int FC, int PWP, int SAT) {
+  Serial.println("persistSoilProps");
+  bool f = NVS.setInt("fieldCapacity", FC);
+  bool p = NVS.setInt("permanentWilt", PWP);
+  bool s = NVS.setInt("soilSaturation", SAT);
+  if (f && p && s) {
+    Serial.println("Soil properties sucessfully stored.");
+    NVS.commit();
+  }
+  else {
+    Serial.println("error occured while trying to persist soil properties");
+  }
+}
+
+void restoreSoilProps() {
+  Serial.println("restoreSoilProps");
+  int fc = NVS.getInt("fieldCapacity");
+  int pwp = NVS.getInt("permanentWilt");
+  int sat = NVS.getInt("soilSaturation");
+  if (fc != 0) {
+    fieldCapacity = fc;
+  }
+  if (pwp != 0) {
+    permanentWiltingPoint = pwp;
+  }
+  if (sat != 0) {
+    soilSaturation = sat;
+  }
+  Serial.print(fieldCapacity);
+  Serial.print(permanentWiltingPoint);
+  Serial.print(soilSaturation);
+}
+
+void setupStore() {
+  NVS.begin("store");
+  restoreSoilProps();
+}
+
 void setSoilProperties(int FC, int PWP, int SAT) {
   fieldCapacity = FC;
   permanentWiltingPoint = PWP;
   soilSaturation = SAT;
-  Serial.print("fieldCapacity: ");
+  persistSoilProps(FC, PWP, SAT);
+  Serial.print("new fieldCapacity: ");
   Serial.println(fieldCapacity);
-  Serial.print("permanentWiltingPoint: ");
+  Serial.print("new permanentWiltingPoint: ");
   Serial.println(permanentWiltingPoint);
-  Serial.print("soilSaturation: ");
+  Serial.print("new soilSaturation: ");
   Serial.println(soilSaturation);
-  // TODO save to nvs nonvolatile flash storage
 }
+