123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
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#ifndef _WIFI_FUNCTIONS_H_
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#define _WIFI_FUNCTIONS_H_
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#include <WiFi.h>
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#include <MQTT.h>
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#include "wifi_settings.h"
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#include "helpfunctions.h"
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bool force_ec_measurement=false;
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struct mqttValueTiming{
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float minchange;
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float maxchange;
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unsigned long mintime;
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unsigned long maxtime;
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float lastvalue=0;
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unsigned long lasttime=0;
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};
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WiFiClient net;
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MQTTClient client;
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bool sendallnext_flag=false;
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bool enableTiming=true;
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void publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis);
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void publishValue(String topic,float value,uint8_t decimals);
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void connect() {
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Serial.print("checking wifi...");
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uint8_t timeout=0;
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while (WiFi.status() != WL_CONNECTED && timeout<10) {
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timeout++;
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Serial.print(".");
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delay(500);
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}
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if (WiFi.status() == WL_CONNECTED)
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{
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Serial.print("\nconnecting...");
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timeout=0;
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#define CONNECT_TIMEOUT 5
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while (!client.connect(client_id, "public", "public") && timeout<CONNECT_TIMEOUT) {
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Serial.print(".");
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delay(1000);
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timeout++;
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}
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if (timeout>=CONNECT_TIMEOUT) {
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Serial.println("\nconnection failed!");
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}else{
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Serial.println("\nconnected!");
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client.subscribe((String)client_id+"/sendall");
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client.subscribe((String)client_id+"/ec/trigger");
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// client.unsubscribe("/hello");
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}
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}
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}
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void messageReceived(String &topic, String &payload) {
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Serial.println("incoming: " + topic + " - " + payload);
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if (topic==((String)client_id+"/sendall") && payload=="true") {
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sendallnext_flag=true;
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Serial.println("Send all values next time");
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}
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if (topic==((String)client_id+"/ec/trigger") && payload=="true") {
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force_ec_measurement=true;
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Serial.println("Forced EC Measurement");
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}
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}
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bool mqtt_loop(unsigned long loopmillis) {
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static unsigned long last_client_loop=0;
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#define CLIENT_LOOP_INTERVAL 10 //ms. fixes some wifi issues. from example https://registry.platformio.org/libraries/256dpi/MQTT/examples/ESP32DevelopmentBoard/ESP32DevelopmentBoard.ino
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if (loopmillis >= last_client_loop+CLIENT_LOOP_INTERVAL) {
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last_client_loop=loopmillis;
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client.loop();
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static unsigned long last_connection_try=0;
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#define RETRY_CONNECTION 60000
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if (!client.connected()) {
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if (loopmillis-last_connection_try>RETRY_CONNECTION) {
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connect();
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}
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}else{
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return true;
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}
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}
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return false;
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}
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void publishValueTimed(String topic,float value,uint8_t decimals,mqttValueTiming &mqttvt,unsigned long loopmillis) {
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unsigned long timediff=loopmillis-mqttvt.lasttime;
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float valuediff=abs(value-mqttvt.lastvalue);
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valuediff=constrain(valuediff,mqttvt.minchange,mqttvt.maxchange);
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unsigned long sendafter=mapf(valuediff,mqttvt.minchange,mqttvt.maxchange,mqttvt.maxtime,mqttvt.mintime); //map valuediff to time when to send
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/*Serial.println();
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Serial.print("timediff="); Serial.print(timediff);
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Serial.print(" valuediff="); Serial.print(valuediff);
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Serial.print(" sendafter="); Serial.println(sendafter);*/
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if (timediff>=sendafter || !enableTiming) {
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mqttvt.lasttime=loopmillis;
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mqttvt.lastvalue=value;
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publishValue(topic,value,decimals);
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}
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}
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void publishValue(String topic,float value,uint8_t decimals) {
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char buffer[16];
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dtostrf(value,1,decimals,buffer);
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client.publish((String)client_id+"/"+topic, buffer);
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Serial.print("Publish Topic="); Serial.print((String)client_id+"/"+topic); Serial.print(" Message="); Serial.println(buffer);
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}
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#endif |