142 lines
4.0 KiB
C++
142 lines
4.0 KiB
C++
/*
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* teasense.ino - Arduino code for the tea sensor
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* Copyright (C) 2023 William Moore
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Coded for the Arduino Uno WiFi rev. 2
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// Uses a standard PT100 RTD and the Adafruit MAX 31865 interface.
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#include <SPI.h>
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#include <WiFiNINA.h>
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#include <Adafruit_MAX31865.h>
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// Create a file called config.h that contains the following:
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// char ssid[] = "SSID";
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// char pass[] = "Password";
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#include "config.h"
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// Use software SPI: CS, DI, DO, CLK
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Adafruit_MAX31865 thermo = Adafruit_MAX31865(10, 11, 12, 13);
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#define RREF 430.0
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// The 'nominal' 0-degrees-C resistance of the sensor
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// 100.0 for PT100, 1000.0 for PT1000
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#define RNOMINAL 100.0
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int status = WL_IDLE_STATUS; //connection status
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const int port = 80;
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WiFiServer server(port);
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void setup() {
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Serial.begin(9600);
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thermo.begin(MAX31865_3WIRE); // set to 2WIRE or 4WIRE as necessary
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Serial.println("Welcome to teasense!");
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String fv = WiFi.firmwareVersion();
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if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
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Serial.println("Please upgrade the firmware");
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}
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// attempt to connect to WiFi network:
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while (status != WL_CONNECTED) {
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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WiFi.setHostname("teasensor");
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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delay(10000);
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}
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server.begin();
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// you're connected now, so print out the status:
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printWifiStatus();
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}
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void printWifiStatus() {
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your board's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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IPAddress gw = WiFi.gatewayIP();
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Serial.print("Gateway IP: ");
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Serial.println(gw);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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void enable_WiFi() {
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String fv = WiFi.firmwareVersion();
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if (fv < "1.0.0") {
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Serial.println("Please upgrade the firmware");
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}
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Serial.println(fv);
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}
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void connect_WiFi() {
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// attempt to connect to Wifi network:
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// while (status != WL_CONNECTED) {
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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WiFi.disconnect();
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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delay(5000);
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// }
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}
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int resetCounter = 0;
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void loop() {
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WiFiClient client = server.available();
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if (client) {
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Serial.println("new client"); // print a message out the serial port
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String currentLine = ""; // make a String to hold incoming data from the client
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if (client.connected()) {
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Serial.println("Reading data from sensor");
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String postData = "{\"temperature\": ";
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postData += thermo.temperature(RNOMINAL, RREF);
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postData += "}";
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// Serial.println(postData);
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String httpResponse = "HTTP/1.1 200 OK\r\n";
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httpResponse += "Content-type: application/json\r\n";
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httpResponse += "Connection: close\r\n\r\n";
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httpResponse += postData;
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client.print(httpResponse);
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Serial.println("HTTP Data Written");
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}
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delay(1);
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Serial.println("Data written");
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client.stop();
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}
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}
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