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BrauHelferlein.ino
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#include "ESPAsyncTCP.h"
#include "ESPAsyncWebServer.h"
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <EEPROM.h>
#include <PID_v1.h>
#include <ArduinoJson.h>
const char* APssid = "Brauhaus";
const char* STAssid = "uni_5";
const char* STApassword = "xxxxxx";
#define ONE_WIRE_BUS 12 // DS18B20 on ESP pin12
#define MISCHERPORT 2
#define RELAISPORT 16
float triggerC = 0.5;
#define resolution 12 // 12bit resolution == 750ms update rate
#define OWinterval (800 / (1 << (12 - resolution)))
#define WindowSize (OWinterval * 6)
#define minWindow 150
#define OFF HIGH
#define ON LOW
#define JSONSize 150
// addr, en,rw,rs,d4,d5,d6,d7
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
#define CONFIG_VERSION 1
#define CONFIG_START 10
struct StoreStruct{
uint8_t version;
double solltemp, consKp, consKi, consKd;
} myStore;
uint32_t lastrun, lastSetpoint = 0,windowStartTime;
uint8_t mischerOff = 0;
uint8_t mischerOn = 0;
uint16_t mischerPower = 0;
bool shouldReboot = false;
double temperature = 25, Output = 0;
PID myPID(&temperature, &Output, &myStore.solltemp,myStore.consKp,myStore.consKi,myStore.consKd, DIRECT);
AsyncWebServer server(80);
AsyncEventSource events("/events"); // event source (Server-Sent events)
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
DeviceAddress tempDeviceAddress;
void loadConfig() {
EEPROM.get(CONFIG_START, myStore);
if (myStore.version != CONFIG_VERSION)
{
myStore.version = CONFIG_VERSION;
myStore.solltemp = 24;
myStore.consKp = 5000;
myStore.consKi = 0;
myStore.consKd = 0;
saveConfig();
}
}
void saveConfig() {
lcd.clear(); lcd.home(); lcd.print("EE save: ");
EEPROM.put(CONFIG_START, myStore);
EEPROM.commit();
lcd.print(" OK");
}
void setup(){
Serial.begin(115200);
Serial.println("sensors begin");
// Start up the DS18B20
DS18B20.begin();
DS18B20.getAddress(tempDeviceAddress, 0);
DS18B20.setResolution(tempDeviceAddress, resolution);
DS18B20.setWaitForConversion(false);
// Init the Display
Wire.begin(4, 5);
lcd.begin (16,2);
lcd.backlight();
lcd.clear();
lcd.home();
// Load PID config
EEPROM.begin(512);
loadConfig();
analogWriteFreq(10000);
digitalWrite(RELAISPORT,HIGH);
pinMode(RELAISPORT, OUTPUT);
digitalWrite(MISCHERPORT,HIGH);
pinMode(MISCHERPORT, OUTPUT);
WifiStart();
// Start Web server configuration
events.onConnect([](AsyncEventSourceClient *client){
if(client->lastId()){
Serial.printf("Client reconnected! Last message ID that it gat is: %u\n", client->lastId());
}});
server.addHandler(&events);
// respond to GET requests on URL /heap
server.on("/heap", HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, "text/plain", String(ESP.getFreeHeap()));
});
// respond to GET requests on URL homepage
server.on("/", HTTP_ANY, [](AsyncWebServerRequest *request){
//Check if POST (but not File) parameter exists
if(request->hasParam("Tsoll", true)) {
AsyncWebParameter* p = request->getParam("Tsoll", true);
if (myStore.solltemp != p->value().toFloat()) {
myStore.solltemp = p->value().toFloat();
lastSetpoint=0;
}
}
if(request->hasParam("Mon", true)) {
AsyncWebParameter* p;
p = request->getParam("Mon", true);
mischerOn = p->value().toInt();
p = request->getParam("Moff", true);
mischerOff = p->value().toInt();
p = request->getParam("MPw", true);
mischerPower = p->value().toInt();
}
AsyncResponseStream *response = request->beginResponseStream("text/html");
response->addHeader("Server","ESP Async Web Server");
response->print(R"V0G0N(
<!DOCTYPE html>
<html>
<head>
<title>Braustube</title>
<link rel="stylesheet" href='https://fonts.googleapis.com/icon?family=Material+Icons'>
<link rel='stylesheet' href='https://code.getmdl.io/1.2.1/material.light_blue-amber.min.css'>
<script defer src='https://code.getmdl.io/1.2.1/material.min.js'></script>
<script type='text/javascript' src='https://www.gstatic.com/charts/loader.js'></script>
<script type="text/javascript">
var chart,gchart, allchart, data, gdata, j, alldata, iv = 1;
function enEvents() {
if (!!window.EventSource) {
var source = new EventSource("/events");
source.addEventListener("message", function(e) {
j = JSON.parse(e.data);
document.getElementById("timer").innerHTML = j.timer;
gdata.setValue(0, 1, j.temp.toFixed(2));
alldata.setValue(0, 1, j.sollT.toFixed(2));
alldata.setValue(1, 1, j.load);
data.addRow([new Date(), j.temp, j.sollT]);
while (data.getNumberOfRows() > 1000) data.removeRow(0);
chart.draw(data, {width: 800,height: 400,vAxis: {scaleType: 'allmaximized',minorGridlines: {count: 5}}});
gchart.draw(gdata, {width: 300,height: 300,min: 25,max: 100,greenFrom: 63,greenTo: 78,minorTicks: 5});
allchart.draw(alldata, {width: 500,height: 200,minorTicks: 5});}, false);}}
function send() {
var f = document.getElementById("myform"),
formData = new FormData(f),
xhr = new XMLHttpRequest();
xhr.open("POST", "/");
xhr.send(formData);
};
window.addEventListener ('submit', function (e) {
e.preventDefault();
send();
return false;})
function chartInit() {
chart = new google.visualization.LineChart(document.getElementById('chart_div'));
gchart = new google.visualization.Gauge(document.getElementById('gchart_big'));
allchart = new google.visualization.Gauge(document.getElementById('gchart_rest'));
data = new google.visualization.DataTable();
data.addColumn('datetime', 'Date');
data.addColumn('number', 'Temp');
data.addColumn('number', 'Soll');
gdata = google.visualization.arrayToDataTable([['Label', 'Value'],['Temp', 80]]);
alldata = google.visualization.arrayToDataTable([['Label', 'Value'],['Soll', 80],['Power', 30]]);
var an = document.getElementById('sliderAn');
an.oninput = function() {document.getElementById("MAan").innerHTML = this.value};
var aus = document.getElementById('sliderAus');
aus.oninput = function() {document.getElementById("MAaus").innerHTML = this.value};
var ts = document.getElementById('tsoll')
ts.oninput = function() {document.getElementById("soll").value = this.value}
var pw = document.getElementById('sliderMpw')
pw.oninput = function() {document.getElementById("Mpw").innerHTML = this.value}
var inputs = document.getElementsByClassName("mdl-slider");
for (var i = 0; i < inputs.length; i++) inputs[i].onchange = send;
enEvents();
}
google.charts.load('current', {'packages': ['corechart', 'gauge']});
google.charts.setOnLoadCallback(chartInit);
</script></head><body>
<div class="mdl-layout mdl-js-layout mdl-layout--fixed-header">
<header class="mdl-layout__header">
<div class="mdl-layout__header-row">
<span class="mdl-layout-title">Braustube</span>
<div class="mdl-layout-spacer"></div>
<nav class="mdl-navigation">
<a class="mdl-navigation__link" href="/settings">Einstellungen</a>
<a class="mdl-navigation__link" href="/update">Firmware</a></nav></div></header>
<div class="mdl-layout__drawer">
<span class="mdl-layout-title">Menu</span>
<nav class="mdl-navigation">
<a class="mdl-navigation__link" href="/settings">Einstellungen</a>
<a class="mdl-navigation__link" href="/update">Firmware</a></nav></div>
<main class="mdl-layout__content mdl-color--grey-100">
<div class="page-content">
<div class="mdl-grid">
<div class="mdl-cell mdl-cell--4-col mdl-shadow--4dp mdl-color--white" id="gchart_big"></div>
<div class="mdl-cell mdl-cell--5-col mdl-shadow--4dp mdl-color--white mdl-cell--bottom" id="gchart_rest"></div>
<form action="#" id="myform">
<table class="mdl-data-table mdl-js-data-table mdl-cell mdl-shadow--6dp"><thead>
<tr><th>Einstellungen</th><th>Wert</th><th>Slider</th></tr></thead><tbody>
<tr><td><i class="material-icons">opacity</i> Soll Temperatur:</td>
<td><div style="width:30px" class="mdl-textfield mdl-js-textfield">
<input class="mdl-textfield__input" type="text" id="soll" name="Tsoll"></div></td>
<td><p style="width:400px"><input id="tsoll" class="mdl-slider mdl-js-slider" type="range" min="45" max="100"></p></td></tr>
<tr><td><i class="material-icons">watch_later</i> T erreicht seit:</td><td></td><td id="timer"></td></tr>
<tr><td><i class="material-icons">rotate_right</i> Mischer aktiv::</td><td id="MAan"></td>
<td><p style="width:400px"><input name="Mon" id="sliderAn" class="mdl-slider mdl-js-slider" type="range" min="0" max="20" value="0"></p></td></tr>
<tr><td><i class="material-icons">replay_30</i> Mischer pausiert:</td><td id="MAaus"></td>
<td><p style="width:400px"><input name="Moff" id="sliderAus" class="mdl-slider mdl-js-slider" type="range" min="0" max="120" value="0"></p>
<tr><td><i class="material-icons">toys</i> Mischer Drehzahl:</td><td id="Mpw"></td>
<td><p style="width:400px"><input name="MPw" id="sliderMpw" class="mdl-slider mdl-js-slider" type="range" min="0" max="100" value="100"></p>
</td></tr></td></tr></tbody></table></form>
<div class="mdl-shadow--4dp mdl-color--white mdl-cell mdl-cell--8-col">
<div id="chart_div"></div></div>
</div></div></main></div></body></html>
)V0G0N");
request->send(response);
});
// respond to requests on URL /settings for PID settings
server.on("/settings", HTTP_ANY, [](AsyncWebServerRequest *request){
//Check if POST (but not File) parameter exists
if(request->hasParam("Kp", true)) {
myStore.consKp = request->getParam("Kp", true)->value().toFloat();
myStore.consKi = request->getParam("Ki", true)->value().toFloat();
myStore.consKd = request->getParam("Kd", true)->value().toFloat();
myPID.SetTunings(myStore.consKp, myStore.consKi, myStore.consKd);
resetPID();
saveConfig();
}
AsyncResponseStream *response = request->beginResponseStream("text/html");
response->addHeader("Server","ESP Async Web Server");
response->printf(R"V0G0N(<!DOCTYPE html><html><head><title>Settings</title>
</head><body>
<h1>PID settings</h1>
Output: %-7.2f<br>
<form action='/settings' method='post' target='_self'>
kP: <input type='text' name='Kp' value="%.0f" /><br>
kI: <input type='text' name='Ki' value="%.0f" /><br>
kD: <input type='text' name='Kd' value="%.0f" /><br>
<input type='submit' value='Apply'></form>
</body></html> )V0G0N",Output,myPID.GetKp(),myPID.GetKi(),myPID.GetKd());
request->send(response);
});
// Simple Firmware Update Form
server.on("/update", HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, "text/html", "<form method='POST' action='/update' enctype='multipart/form-data'><input type='file' name='update'><input type='submit' value='Update'></form>");
});
server.on("/update", HTTP_POST, [](AsyncWebServerRequest *request){
shouldReboot = !Update.hasError();
AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", shouldReboot?"OK":"FAIL");
response->addHeader("Connection", "close");
request->send(response);
},[](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final){
if(!index){
Serial.printf("Update Start: %s\n", filename.c_str());
//WiFiUDP::stopAll();
Update.runAsync(true);
if(!Update.begin((ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000)){
Update.printError(Serial);
}
}
if(!Update.hasError()){
if(Update.write(data, len) != len){
Update.printError(Serial);
}
}
if(final){
if(Update.end(true)){
Serial.printf("Update Success: %uB\n", index+len);
} else {
Update.printError(Serial);
}
}
});
// Start the web server
server.begin();
DS18B20.requestTemperatures();
windowStartTime = millis();
//tell the PID to range between 0 and the full window size
myPID.SetOutputLimits(minWindow, WindowSize);
myPID.SetTunings(myStore.consKp, myStore.consKi, myStore.consKd);
myPID.SetSampleTime(OWinterval);
//turn the PID on
resetPID();
delay(2000);
lcd.clear();
}
inline void relais(bool state) {
digitalWrite(RELAISPORT,state);
}
void resetPID() {
myPID.SetMode(MANUAL);
Output=0;
myPID.SetMode(AUTOMATIC);
}
void WifiStart() {
uint8_t i=0;
lcd.setCursor(0,0); lcd.print("Wifi STA: last");
WiFi.begin();
//WiFi.setAutoReconnect(true);
lcd.setCursor(0,1);
// We try to connect with the last known AP
while (WiFi.status() != WL_CONNECTED) {
delay(500);
i++;
if (i%15 == 0) {
lcd.setCursor(0,1);
lcd.print(" ");
lcd.setCursor(0,1);
}
else lcd.print(".");
// We were unable, so try the hard coded AP
if (i == 20) {
lcd.clear();
lcd.setCursor(0,0);lcd.print("Wifi STA:"); lcd.print(STAssid);
WiFi.begin(STAssid,STApassword);
lcd.setCursor(0,1);
}
// No APs found, so we spin up own AP
// TODO: When in AP mode, we have no Internet, so the JS libraries cant be loaded on the client
// can we serve them from ESP?
if (i == 40) {
lcd.clear();
lcd.setCursor(0,0); lcd.print("Wifi AP & STA");
WiFi.disconnect();
WiFi.mode(WIFI_AP_STA);
WiFi.softAP(APssid);
delay(2000);
lcd.setCursor(0,1);lcd.print("ApIP:");lcd.print(WiFi.softAPIP());
break;
}
}
if (WiFi.status() == WL_CONNECTED) {
lcd.setCursor(0,1);lcd.print("IP:");lcd.print(WiFi.localIP());
}
}
void loop(){
StaticJsonBuffer<JSONSize> jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
if(shouldReboot){
Serial.println("Rebooting...");
delay(100);
ESP.restart();
}
// We run yet when we have new Temperatur data from DS18B20
if (millis()-lastrun > OWinterval) {
lastrun = millis();
float tnew = DS18B20.getTempCByIndex(0);
DS18B20.requestTemperatures();
// test if we have valid temp reading
if (tnew==DEVICE_DISCONNECTED_C || // DISCONNECTED
(tnew==85.0 && abs(tnew - temperature) > 2 ) ) // we read 85 uninitialized but we are not close to 85 hot
{
Serial.println("DISCONNECTED");
lcd.setCursor(0,0); lcd.print("-");
}
else
{
temperature = tnew;
char buf[10];
uint32_t passedT = 0;
// calculate the time we are set in
if (lastSetpoint != 0) passedT = (millis() - lastSetpoint) / 1000;
else if ( abs(temperature-myStore.solltemp) < triggerC) // or we just reached it
{
lastSetpoint = millis();
// reset the PID error here
resetPID();
}
// myPID.Compute();
if(millis() - windowStartTime > WindowSize)
{ //time to shift the Relay Window and recalculate
windowStartTime = millis();
myPID.Compute();
}
snprintf (buf, sizeof(buf), "%03d:%02d", passedT/60, passedT%60);
root["timer"] = jsonBuffer.strdup(buf);
lcd.setCursor(10,1); lcd.print(buf);
Serial.print("T: "); Serial.println(temperature);
snprintf (buf, sizeof(buf), "%6.2f", temperature);
lcd.setCursor(0,0); lcd.print("T:"); lcd.print(buf); lcd.print((char)223);
root["temp"] = temperature;
snprintf (buf, sizeof(buf), "%6.2f", myStore.solltemp);
lcd.setCursor(0,1); lcd.print("S:"); lcd.print(buf); lcd.print((char)223);
root["sollT"] = myStore.solltemp;
int8_t load = (Output-minWindow)*100.0 / (WindowSize-minWindow);
snprintf (buf, sizeof(buf), "%3u%%", load);
lcd.setCursor(12,0);
lcd.print(buf);
root["load"] = load;
// We send JSON data to the client
char buffer[JSONSize];
root.printTo(buffer, sizeof(buffer));
events.send(buffer, "message");
}
}
// Translation of Power to Relay interval
if(Output > minWindow && Output > millis() - windowStartTime) relais(ON);
else relais(OFF);
// Mischer interval calculation
static uint32_t lastmischer;
if (millis()-lastmischer > 1000) {
lastmischer = millis();
if (mischerOn && (millis() / 1000) % (mischerOn + mischerOff) < mischerOn) {
analogWrite(MISCHERPORT, 10.23 * (100-mischerPower)); }
else {
digitalWrite(MISCHERPORT, true);
}
}
}