Initial commit

2022-05-02 15:51:13 +03:00
commit 652b94d0c7
4 changed files with 165 additions and 0 deletions
@@ -0,0 +1,144 @@
+#include "DHT.h"
+#include <ESP8266WiFi.h>
+#include <ModbusIP_ESP8266.h>
+#include "config.h"
+
+#define TCP_PORT 15000
+
+#define SENSOR_UPDATE_INTERVAL 500
+
+#define MODE_AUTO 0
+#define MODE_MANUAL 1
+
+#define REGISTER_CURRENT_TEMP 0
+#define REGISTER_CURRENT_HUM 1
+#define REGISTER_CURRENT_PRESS 2
+#define REGISTER_CUR_STATE 3
+#define REGISTER_MODE 4
+#define REGISTER_P_ON 5
+#define REGISTER_P_OFF 6
+
+#define DHTPIN D3
+#define DHTTYPE AM2301
+
+ModbusIP mb;
+DHT dht(DHTPIN, DHTTYPE);
+
+char id[64];
+
+unsigned long last_update;
+
+int p_on = 150;
+int p_off = 250;
+int cur_mode = MODE_AUTO;
+int cur_state = 0;
+int cur_p = 0;
+int cur_t = 0;
+int cur_hum = 0;
+
+void setup() 
+{
+	pinMode(D4, OUTPUT);
+	pinMode(DHTPIN, INPUT);
+	pinMode(A0, INPUT);
+	Serial.begin(115200);
+	Serial.println("Initialized...");
+
+	WiFi.begin(WIFI_NAME, WIFI_PASS);
+	Serial.print("Connecting");
+	while (WiFi.status() != WL_CONNECTED)
+	{
+		delay(500);
+		Serial.print(".");
+	}
+	Serial.println();
+
+	Serial.print("Connected, IP address: ");
+	Serial.println(WiFi.localIP());
+	uint8_t macAddr[6];
+	WiFi.macAddress(macAddr);
+	sprintf(id, "%02x:%02x:%02x:%02x:%02x:%02x", macAddr[0], macAddr[1], macAddr[2], macAddr[3], macAddr[4], macAddr[5]);
+	Serial.printf("Connected, mac address: %s\n", id);
+	// DHT sensor init
+	dht.begin();
+	// Modbus init	
+	mb.server(15000);
+	mb.addHreg(REGISTER_CURRENT_TEMP, cur_t);
+	mb.addHreg(REGISTER_CURRENT_HUM, cur_hum);
+	mb.addHreg(REGISTER_CURRENT_PRESS, cur_p);
+	mb.addHreg(REGISTER_CUR_STATE, cur_state);
+	mb.addHreg(REGISTER_MODE, cur_mode);
+	mb.addHreg(REGISTER_P_ON, p_on);
+	mb.addHreg(REGISTER_P_OFF, p_off);
+}
+
+
+void UpdateSensorData()
+{
+	float h = dht.readHumidity();
+	float t = dht.readTemperature();
+	Serial.print("read h ");
+	Serial.print(h);
+	Serial.print(" read t ");
+	Serial.println(t);
+	cur_hum = (int)(h * 100);
+	cur_t = (int)(t * 100);
+	int p_int = analogRead(A0);
+	// we have 10-bit ADC, so get value between 0 and 1 and then multiply by max voltage
+	// (it is 3.3)
+	float p_volt = (p_int / 1024.0f) * 3.3f;
+	// divide by maximal input voltage from sensor (it is 2.5)
+	// and then multiply by sensor max value (10 bar) - we will get pressure in bar
+	// finally multiply by 100 as we have int registers
+	cur_p = (int)(((p_volt / 2.5f) * 10) * 100);
+}
+
+void loop() 
+{
+	unsigned long current = millis();
+	int u = 0;
+	if (current < last_update || current - last_update >= SENSOR_UPDATE_INTERVAL)
+	{
+		UpdateSensorData();
+		last_update = current;
+		u = 1;
+	}
+	mb.task();
+	p_on = mb.Hreg(REGISTER_P_ON);
+	p_off = mb.Hreg(REGISTER_P_OFF);
+	cur_mode = mb.Hreg(REGISTER_MODE);
+	if (cur_mode == MODE_AUTO)
+	{
+		if (cur_p < p_on) cur_state = 1;
+		else if (cur_p > p_off) cur_state = 0;
+		mb.Hreg(REGISTER_CUR_STATE, cur_state);
+	}
+	else
+	{
+		cur_state = mb.Hreg(REGISTER_CUR_STATE);
+	}
+	digitalWrite(D4, cur_state);
+	if (u) 
+	{
+		Serial.print("Current pressure: ");
+		Serial.print(cur_p);
+		Serial.print(" t ");
+		Serial.print(cur_t);
+		Serial.print(" h ");
+		Serial.print(cur_hum);
+		Serial.print(" state ");
+		Serial.println(cur_state);
+	}
+	mb.Hreg(REGISTER_P_ON, p_on);
+	mb.Hreg(REGISTER_P_OFF, p_off);
+	mb.Hreg(REGISTER_MODE, cur_mode);
+	mb.Hreg(REGISTER_CURRENT_TEMP, cur_t);
+	mb.Hreg(REGISTER_CURRENT_HUM, cur_hum);
+	mb.Hreg(REGISTER_CURRENT_PRESS, cur_p);
+	if (WiFi.status() != WL_CONNECTED)
+	{
+		// no wifi
+		Serial.println("No WiFi connection");
+		ESP.restart();
+	}
+}