139 lines
3.1 KiB
Arduino
139 lines
3.1 KiB
Arduino
#include <ESP8266WiFi.h>
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#include <ModbusIP_ESP8266.h>
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#include "config.h"
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// modbus consts and works
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#define TCP_PORT 15000
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#define POLL_INTERVAL 10000
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#define T_UPDATE_INTERVAL 500
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#define MODE_AUTO 0
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#define MODE_MANUAL 1
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#define REGISTER_MODE 0
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#define REGISTER_CUR_STATE 1
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#define REGISTER_RELAY_TEMP 2
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#define REGISTER_OVERHEAT 3
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#define REGISTER_OVERRIDE_STATE 4
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// critical relay temp (degrees multiplied by 100)
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#define CRITICAL_T 6000
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ModbusIP mb;
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char id[64];
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long last_poll;
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long last_update;
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int cur_mode = MODE_AUTO;
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int cur_state = 0;
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int relay_t = 0;
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int overheat = 0;
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int override_state = 0;
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void setup()
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{
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pinMode(D1, OUTPUT);
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Serial.begin(115200);
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Serial.println("Initialised...");
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WiFi.begin(WIFI_NAME, WIFI_PASS);
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Serial.print("Connecting");
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while (WiFi.status() != WL_CONNECTED)
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{
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.print("Connected, IP address: ");
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Serial.println(WiFi.localIP());
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uint8_t macAddr[6];
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WiFi.macAddress(macAddr);
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sprintf(id, "%02x:%02x:%02x:%02x:%02x:%02x", macAddr[0], macAddr[1], macAddr[2], macAddr[3], macAddr[4], macAddr[5]);
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Serial.printf("Connected, mac address: %s\n", id);
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last_poll = millis();
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mb.server(15000);
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mb.addHreg(REGISTER_MODE, cur_mode);
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mb.addHreg(REGISTER_CUR_STATE, cur_state);
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mb.addHreg(REGISTER_RELAY_TEMP, relay_t);
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mb.addHreg(REGISTER_OVERHEAT, overheat);
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mb.addHreg(REGISTER_OVERRIDE_STATE, override_state);
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}
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// thermistor
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#define THERMISTORPIN A0
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#define THERMISTORNOMINAL 10000
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#define TEMPERATURENOMINAL 25
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#define NUMSAMPLES 5
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#define BCOEFFICIENT 3950
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#define SERIESRESISTOR 10000
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void UpdateCurrent()
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{
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float average = 0;
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for (int i = 0; i < NUMSAMPLES; i++)
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{
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average += analogRead(THERMISTORPIN);
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delay(10);
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}
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average /= NUMSAMPLES;
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average = 1023 / average - 1;
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average = SERIESRESISTOR / average;
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float steinhart;
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steinhart = average / THERMISTORNOMINAL; // (R/Ro)
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steinhart = log(steinhart); // ln(R/Ro)
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steinhart /= BCOEFFICIENT; // 1/B * ln(R/Ro)
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steinhart += 1.0 / (TEMPERATURENOMINAL + 273.15); // + (1/To)
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steinhart = 1.0 / steinhart; // инвертируем
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steinhart -= 273.15; // конвертируем в градусы по Цельсию
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relay_t = int(steinhart * 100);
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last_update = millis();
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}
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void loop()
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{
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unsigned long current = millis();
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int u = 0;
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if (current < last_update || current - last_update >= T_UPDATE_INTERVAL)
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{
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UpdateCurrent();
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u = 1;
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}
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mb.task();
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cur_mode = mb.Hreg(REGISTER_MODE);
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override_state = mb.Hreg(REGISTER_OVERRIDE_STATE);
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if (cur_mode == MODE_AUTO)
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{
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cur_state = mb.Hreg(REGISTER_CUR_STATE);
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}
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else
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{
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cur_state = override_state;
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}
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if (relay_t > CRITICAL_T)
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{
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Serial.printf("Critical overheat, t = %d\n", relay_t);
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cur_state = 0;
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overheat = 1;
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}
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else overheat = 0;
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digitalWrite(D1, cur_state);
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if (u)
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{
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Serial.printf("Cur state %d Cur relay t %d\n", cur_state, relay_t);
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}
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mb.Hreg(REGISTER_MODE, cur_mode);
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mb.Hreg(REGISTER_RELAY_TEMP, relay_t);
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mb.Hreg(REGISTER_OVERHEAT, overheat);
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mb.Hreg(REGISTER_CUR_STATE, cur_state);
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if (WiFi.status() != WL_CONNECTED)
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{
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// no wifi
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Serial.println("No WiFi connection");
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ESP.restart();
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}
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}
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