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water_pressure_and_ds18.esp32.js
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// WIFI
var _wifi_ssid = 'IoT';
var _wifi_password = 'IoT12345';
// WebServer
var _web_enabled = false;
var _web_port = 80;
// InfluxDB configuration
var _influx_enabled = true;
var _influxDBParams = {
influxDBHost: '192.168.1.10',
influxPort: 8086,
influxDBName: 'zwave',
influxUserName: 'asd',
influxPassword: 'asd',
influxAgentName: 'PressureSensor-' + getSerial()
};
var _resolution = 1024;
var _pinPressureSensor = A0;
var _minPressureSensorVoltage = 0.107;
var _maxPressureSensorVoltage = 0.990;
var _maxPressureSensorPressure = 175;
var _pinOneWire = NodeMCU.D7; // D13
var _oledScreenI2C = {
scl: NodeMCU.D1, // D5
sda: NodeMCU.D2 // D4
};
var g;
var gPos = 0;
var pubSensors = [];
var wifi = require('Wifi');
if( _influx_enabled ){
var influxDB = require("InfluxDB").setup( _influxDBParams );
}
if( _web_enabled ){
var WebServer = require("WebServer");
}
console.log('a');
function startServer()
{
if( _web_enabled )
{
var webs = new WebServer({
port: _web_port,
// file_system: '/var/www/',
memory: {
'index.html': {
'type': 'text/html',
'content': '<html><head><script src="index.js"></script></head><body>' +
'<p>Hello from in memory HTML!</p>' +
'<br><br><button onclick="window.open(\'index.njs\', \'_top\')"> View sensors</button>' +
'<br><p align="right"> <small>Espruino WebServer</small> </p>' +
'</body></html>'
},
'index.njs': {
'content': index_njs
}
}
});
webs.on('start', function (WebServer) {
console.log('WebServer listening on port ' + WebServer.port);
});
webs.on('request', function (request, response, parsedUrl, WebServer) {
console.log('WebServer requested', parsedUrl);
});
webs.on('error', function (error, WebServer) {
console.log('WebServer error', error);
});
webs.createServer();
}
}
function index_njs(req, res, uri, webs) {
let html = '<html>';
html += '<p>Hello from in memory server side javascript!</p>';
for (var s in pubSensors)
{
html += '<p><b>' + s + ': </b>: ' + pubSensors[s] + '</p>';
}
html += '</html>';
return {
type: 'text/html',
content: html
};
}
function _wifiChecker() {
setInterval(function() {
if( wifi.getIP().ip == '0.0.0.0' )
{
console.log('[WiFi] disconnected');
}
else
{
console.log('[WiFi] connected');
}
console.log(process.memory());
}, 10000);
}
// Init screen
function _initScreen()
{
I2C1.setup( _oledScreenI2C );
g = require("SSD1306").connect( I2C1, _startScreen, { height : 64, width: 48 } );
}
// Start screen
function _startScreen(){
require('FontDennis8').add(Graphics);
g.setFontDennis8();
g.setRotation(1,0);
console.log('Screen: ' + g.getHeight(), 'x', g.getWidth() );
setInterval(_displayScreen, 100);
}
function _displayScreen()
{
let text = '',
ssid = wifi.getDetails().ssid,
memPercent = Math.ceil((process.memory().usage / process.memory().total) * 100);
gPos--;
if( ssid.length > 3 ){
ssid = ssid.substr(0, 3) + '. ';
}
g.clear();
g.drawString( ssid + ' ' + _calculateRssiSignal(), 0, 0);
g.drawString(wifi.getIP().ip, 0, 9);
g.drawString( (Math.round(pubSensors.pressure * 100) / 100) + ' BAR', 0, 20);
g.drawString('Mem: ' + memPercent + '%', 0, 40);
for (var s in pubSensors)
{
if( s !== 'pressure' ){
text += s.substr(0, 4) + ' ' + (Math.round(pubSensors[s] * 10) / 10) + "°C, ";
}
}
text = text.slice(0, -2);
if (gPos < -g.stringWidth(text)) gPos=g.getWidth();
g.drawString(text, gPos, 29);
g.flip();
}
// Init OneWire
function _initOneWire()
{
let ow = new OneWire( _pinOneWire );
setInterval(function(){
// Search sensors
let sensors = ow.search().map( device => {
return require("DS18B20").connect(ow, device);
});
// Get temperatures
sensors.forEach((sensor, index) => {
sensor.getTemp(temp => {
pubSensors[sensor.sCode] = temp;
console.log( sensor.sCode + ": " + temp + "°C" );
});
});
}, 10000 );
}
// Init Pressure sensor
function _initPressureSensor()
{
setInterval(function(){
let voltage = analogRead( _pinPressureSensor),
resVoltage = map(voltage, _minPressureSensorVoltage, _maxPressureSensorVoltage, 0, _resolution),
psi = ( resVoltage / _resolution * _maxPressureSensorPressure ),
bar = psi * 0.0689475728,
barRounded = Math.round(bar * 1000) / 1000;
pubSensors.pressure = barRounded;
}, 1000 );
}
// Publish sensor info
function _publishSensorInfo()
{
if( _influx_enabled )
{
setInterval(function(){
let data = '';
for (var s in pubSensors){
data += _influxDBParams.influxAgentName + ',sensor=' + s + ' value=' + pubSensors[s] + "\n";
}
console.log('Send data: ', data);
try {
influxDB.write( data );
return true;
}
catch(e){
console.log(e);
}
}, 30000);
}
}
function _calculateRssiSignal()
{
let rssi = wifi.getDetails().rssi,
sigInt = Math.ceil(map( rssi, -90, -30, 1, 7)),
sigText = '';
for(let i=1; i <= sigInt; i++){
sigText += String.fromCharCode(0x90 + i);
}
return sigText;
}
// Map fn
function map( x, in_min, in_max, out_min, out_max){
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
// OnInit
function onInit() {
wifi.connect( _wifi_ssid, { password: _wifi_password }, () => {
console.log('Connected to Wifi. IP address is:', wifi.getIP().ip);
startServer();
// Publish sensor info
_publishSensorInfo();
});
// Wifi connected
wifi.on('connected', (details) => {
console.log('[WiFi]: Connected.', details);
});
// Wifi disconnected
wifi.on('disconnected', (details) => {
console.log('[WiFi]: Disconnected.', details);
});
// Wifi checker
_wifiChecker();
// Init Screen
_initScreen();
// Init OneWire
_initOneWire();
// Init Pressure sensor
_initPressureSensor();
}