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- /*
- * RevSpace SensorNode
- *
- * 1wire Temp sensor on an ESP8266 connected to GPIO 5 (don't forget pullup 4.7k!)
- *
- *
- */
- #include <EEPROM.h>
- #include <OneWire.h>
- #include <ESP8266WiFi.h>
- #include <WiFiUdp.h>
- #include <WiFiClient.h>
- #include <PubSubClient.h>
- // WiFi settings
- const char ssid[] = "revspace-pub-2.4ghz"; // your network SSID (name)
- const char pass[] = ""; // your network password
- const char* mqtt_server = "mosquitto.space.revspace.nl";
- WiFiClient espClient;
- PubSubClient client(mqtt_server, 1883, onMqttMessage, espClient);
- OneWire ds(5); // on pin 10 (a 4.7K resistor is necessary)
- long lastMsg = 0;
- char msg[50];
- int value = 0;
- long lastReconnectAttempt = 0;
- float celsius, fahrenheit;
- String adres1wire;
- void setup() {
- // put your setup code here, to run once:
- Serial.begin(115200);
- Serial.println();
- // We start by connecting to a WiFi network
- Serial.print("Connecting to ");
- Serial.println(ssid);
- WiFi.begin(ssid, pass);
- while (WiFi.status() != WL_CONNECTED) {
- delay(50);
- Serial.print(".");
- }
- Serial.println("");
- Serial.print("WiFi connected to: ");
- Serial.println(ssid);
- Serial.print("IP address: ");
- Serial.println(WiFi.localIP());
- Serial.println();
- temperatuur();
- }
- void loop() {
- // put your main code here, to run repeatedly:
- if (!client.connected()) {
- Serial.println(".");
- long verstreken = millis();
- if (verstreken - lastReconnectAttempt > 5000) {
- lastReconnectAttempt = verstreken;
- // Attempt to reconnect
- if (reconnect()) {
- lastReconnectAttempt = 0;
- }
- }
- } else {
- // Client connected
- client.loop();
- }
- temperatuur();
- delay(20000);
- }
- boolean reconnect() {
- if (client.connect("sensor01")) {
- Serial.println("Reconnected to MQTT");
- // Once connected, publish an announcement...
- client.publish("revspace/sensorgrid", "hello world!");
- client.loop();
- }
- return client.connected();
- }
- void onMqttMessage(char* topic, byte* payload, unsigned int length) {
- }
- void temperatuur() {
- byte i;
- byte present = 0;
- byte type_s;
- byte data[12];
- byte addr[8];
- adres1wire = "";
- if ( !ds.search(addr)) {
- Serial.println("No more addresses.");
- Serial.println();
- ds.reset_search();
- delay(250);
- return;
- }
- Serial.print("ROM =");
- for ( i = 0; i < 8; i++) {
- Serial.write(' ');
- Serial.print(addr[i], HEX);
- }
- for ( i = 0; i < 8; i++) {
- if (addr[i] < 16) {
- adres1wire += "0";
- }
- adres1wire += String(addr[i], HEX);
- }
- Serial.println();
- if (OneWire::crc8(addr, 7) != addr[7]) {
- Serial.println("CRC is not valid!");
- return;
- }
- Serial.println();
- // the first ROM byte indicates which chip
- switch (addr[0]) {
- case 0x10:
- Serial.println(" Chip = DS18S20"); // or old DS1820
- type_s = 1;
- break;
- case 0x28:
- Serial.println(" Chip = DS18B20");
- type_s = 0;
- break;
- case 0x22:
- Serial.println(" Chip = DS1822");
- type_s = 0;
- break;
- default:
- Serial.println("Device is not a DS18x20 family device.");
- return;
- }
- ds.reset();
- ds.select(addr);
- ds.write(0x44, 1); // start conversion, with parasite power on at the end
- delay(1000); // maybe 750ms is enough, maybe not
- // we might do a ds.depower() here, but the reset will take care of it.
- present = ds.reset();
- ds.select(addr);
- ds.write(0xBE); // Read Scratchpad
- Serial.print(" Data = ");
- Serial.print(present, HEX);
- Serial.print(" ");
- for ( i = 0; i < 9; i++) { // we need 9 bytes
- data[i] = ds.read();
- Serial.print(data[i], HEX);
- Serial.print(" ");
- }
- Serial.print(" CRC=");
- Serial.print(OneWire::crc8(data, 8), HEX);
- Serial.println();
- // Convert the data to actual temperature
- // because the result is a 16 bit signed integer, it should
- // be stored to an "int16_t" type, which is always 16 bits
- // even when compiled on a 32 bit processor.
- int16_t raw = (data[1] << 8) | data[0];
- if (type_s) {
- raw = raw << 3; // 9 bit resolution default
- if (data[7] == 0x10) {
- // "count remain" gives full 12 bit resolution
- raw = (raw & 0xFFF0) + 12 - data[6];
- }
- } else {
- byte cfg = (data[4] & 0x60);
- // at lower res, the low bits are undefined, so let's zero them
- if (cfg == 0x00) raw = raw & ~7; // 9 bit resolution, 93.75 ms
- else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
- else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
- //// default is 12 bit resolution, 750 ms conversion time
- }
- celsius = (float)raw / 16.0;
- Serial.print(" Temperature = ");
- Serial.print(celsius);
- Serial.println("°C");
- char netter[42];
- String publishadress = "revspace/sensors/esptemp/" + adres1wire;
- Serial.println();
- Serial.print("Publishing to ");
- Serial.println(publishadress);
- publishadress.toCharArray(netter, 42);
- char temperatuur[10];
- String temperatuurkladje;
- temperatuurkladje = celsius;
- temperatuurkladje += " °C";
- temperatuurkladje.toCharArray(temperatuur, 10);
- client.loop();
- if (!client.connected()) {
- reconnect();
- }
- client.publish(netter, temperatuur, 1);
- client.loop();
- delay(500);
- }
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