Get information in website http://alertablu.cob.sc.gov.br/p/detalhada about situation of weather and print using Node MCU 8266 and Nextion NX3224T024
This site show informations aboute situation of weather in Blumenau, very important to make actions by people.
This project use PHP (http://php.net/) to get information in web page, NodeMCU ESP8266 (https://nodemcu.readthedocs.io/en/master/) to connect to server of the host PHP and get information simple to show in Nextion NX3224T024 (https://nextion.tech/basic-series-introduction/).
1 - This project is show in Figure below:
2 - File "data.php" to get informations about web page http://alertablu.cob.sc.gov.br/p/detalhada
<?php
Use:
// data.php?option=date
// data.php?option=period
// data.php?option=condition
// data.php?option=sky
// data.php?option=precipitation
// data.php?option=wind
// data.php?option=temperature
// data.php?option=temperaturedate
// data.php?option=temperaturemininum
// data.php?option=temperaturemaximum
// data.php?option=temperaturaunit
// data.php?option=basic
// data.php?option=all
// data.php?option=node
header( 'Content-Type: application/json' );
error_reporting(~E_ALL);
function getPeriod( $xpath, $padrao ){
$value =[];
for( $i=0; $i<4; $i++ ){
preg_match( $padrao, $xpath->query( '//table [@id="forecast-table"]/thead/tr/th' )->item($i)->textContent, $matches, PREG_OFFSET_CAPTURE);
$value[$i] = str_replace("ã", "a", $matches[0][0]);
}
return $value;
}
function figureToNumber( $name ){
$figures = [
'D/claro.png',
'D/encoberto.png',
'D/encoberto_chuva.png',
'D/encoberto_nublado_chuva.png',
'D/nublado.png',
'D/nublado_chuva.png',
'D/parcial_nublado.png',
'N/claro.png',
'N/encoberto.png',
'N/encoberto_chuva.png',
'N/encoberto_nublado_chuva.png',
'N/nublado.png',
'N/nublado_chuva.png',
'N/parcial_nublado.png'
];
$index = array_search( $name, $figures );
return ($index===FALSE?14:$index);
}
function getImages( $xpath, $index ){
$node = $xpath->query( '//table [@id="forecast-table"]/tbody/tr' )->item($index);
$child = $node->firstChild;
$i = 0;
$value = [];
while( $child ){
if( $child->nodeName == 'td' ){
$value[$i] = substr( $child->childNodes[1]->getAttribute( 'src' ), 21 );
$i = $i + 1;
}
$child = $child->nextSibling;
}
return $value;
}
function getOthers( $xpath, $index ){
$node = $xpath->query( '//table [@id="forecast-table"]/tbody/tr' )->item($index);
$child = $node->firstChild;
$i = 0;
$value = [];
while( $child ){
if( $child->nodeName == 'td' ){
$value[$i] = str_replace( "ã", "a", $child->textContent);
$value[$i] = str_replace( "á", "a", $value[$i]);
$value[$i] = str_replace( "é", "e", $value[$i]);
$value[$i] = str_replace( "ç", "c", $value[$i]);
$i = $i + 1;
}
$child = $child->nextSibling;
}
return $value;
}
function getTemperature( $xpath, $index ){
$node = $xpath->query( '//table [@id="forecast-table"]/tbody/tr' )->item($index);
$child = $node->firstChild;
$value = [];
while( $child ){
if( $child->nodeName == 'td' ){
$text = trim( $child->firstChild->textContent );
preg_match_all( '/\d+/', $text, $matches, PREG_OFFSET_CAPTURE );
$value[0] = $matches[0][0][0];
$value[1] = $matches[0][1][0];
$value[2] = $matches[0][2][0];
$value[3] = $matches[0][3][0];
$value[4] = $matches[0][4][0];
break;
}
$child = $child->nextSibling;
}
return $value;
}
function getJSON( $data, $field ){
$result = '"' . $field . '":[';
foreach( $data[$field] as $key => $value ){
$result = $result . "\"$value\",";
}
$result = substr( $result, 0, strlen($result)-1 );
$result = $result . ']';
return $result;
}
function help(){
return
"\r\n\t" . 'help": "use data.php?option=op",' . "\r\n\t" .
'"op": "date, period, condition, sky, precipitation, wind, temperature, temperaturedate, temperaturemininum, temperaturemaximum, temperaturaunit, basic, all or node"' . "\r\n";
}
$filename = 'http://alertablu.cob.sc.gov.br/p/detalhada'; // string //
$flags = FILE_BINARY; // int //
$context = NULL; // resource //
$offset = 0; // int //
$maxlen = 100000; // int //
if( ($text = file_get_contents($filename, $flags, $context, $offset, $maxlen)) !== FALSE ){
$doc = new DOMDocument;
$doc->loadHTML( $text );
$xpath = new DOMXpath( $doc );
$data = [];
$data['data'] = getPeriod( $xpath, '@[0-9]{2}/[0-9]{2}/[0-9]{4}@i' );
$data['periodo_do_dia'] = getPeriod( $xpath, '@[a-zA-Z].*@i' );
$data['condicao_do_tempo_img'] = getImages( $xpath, 0 );
$data['ceu'] = getOthers( $xpath, 1 );
$data['precipitacao'] = getOthers( $xpath, 2 );
$data['vento'] = getOthers( $xpath, 3 );
$data['temperatura'] = getOthers( $xpath, 4 );
$values = getTemperature( $xpath, 5 );
$data['temperatura_data'] = $values[0].'/'.$values[1].'/'.$values[2];
$data['temperatura_minima'] = $values[3];
$data['temperatura_maxima'] = $values[4];
$data['temperatura_unidade'] = 'C';
$result = '{';
if( isset($_GET['option']) ){
switch( $_GET['option'] ){
case 'date':
$result = $result . getJSON( $data, 'data' );
break;
case 'period':
$result = $result . getJSON( $data, 'periodo_do_dia' );
break;
case 'condition':
$result = $result . getJSON( $data, 'condicao_do_tempo_img' );
break;
case 'sky':
$result = $result . getJSON( $data, 'ceu' );
break;
case 'precipitation':
$result = $result . getJSON( $data, 'precipitacao' );
break;
case 'wind':
$result = $result . getJSON( $data, 'vento' );
break;
case 'temperature':
$result = $result . getJSON( $data, 'temperatura' );
break;
case 'temperaturedate':
$result = $result . "\"temperatura_data\":\"{$data['temperatura_data']}\"";
break;
case 'temperaturemininum':
$result = $result . "\"temperatura_minima\":\"{$data['temperatura_minima']}\"";
break;
case 'temperaturemaximum':
$result = $result . "\"temperatura_maxima\":\"{$data['temperatura_maxima']}\"";
break;
case 'temperaturaunit':
$result = $result . "\"temperatura_unidade\":\"{$data['temperatura_unidade']}\"";
break;
case 'basic':
$result = $result . getJSON( $data, 'data' ) . ',';
$result = $result . getJSON( $data, 'periodo_do_dia' ) . ',';
$result = $result . getJSON( $data, 'condicao_do_tempo_img' ) . ',';
$result = $result . "\"temperatura_minima\":\"{$data['temperatura_minima']}\"" . ',';
$result = $result . "\"temperatura_maxima\":\"{$data['temperatura_maxima']}\"";
break;
case 'all':
$result = $result . getJSON( $data, 'data' ) . ',';
$result = $result . getJSON( $data, 'periodo_do_dia' ) . ',';
$result = $result . getJSON( $data, 'condicao_do_tempo_img' ) . ',';
$result = $result . getJSON( $data, 'ceu' ) . ',';
$result = $result . getJSON( $data, 'precipitacao' ) . ',';
$result = $result . getJSON( $data, 'vento' ) . ',';
$result = $result . getJSON( $data, 'temperatura' ) . ',';
$result = $result . "\"temperatura_data\":\"{$data['temperatura_data']}\"" . ',';
$result = $result . "\"temperatura_minima\":\"{$data['temperatura_minima']}\"" . ',';
$result = $result . "\"temperatura_maxima\":\"{$data['temperatura_maxima']}\"" . ',';
$result = $result . "\"temperatura_unidade\":\"{$data['temperatura_unidade']}\"";
break;
case 'node':
$result = $result . str_ireplace( 'data', 'd', getJSON( $data, 'data' ) ) . ',';
$result = $result . str_ireplace( 'periodo_do_dia', 'p', getJSON( $data, 'periodo_do_dia' ) ) . ',';
$result = $result . '"i":[';
$result = $result . '"' . figureToNumber($data['condicao_do_tempo_img'][0]) . '",';
$result = $result . '"' . figureToNumber($data['condicao_do_tempo_img'][1]) . '",';
$result = $result . '"' . figureToNumber($data['condicao_do_tempo_img'][2]) . '",';
$result = $result . '"' . figureToNumber($data['condicao_do_tempo_img'][3]) . '"],';
$result = $result . "\"l\":\"{$data['temperatura_minima']}\"" . ',';
$result = $result . "\"u\":\"{$data['temperatura_maxima']}\"" . ',';
$result = $result . '"h":"' . date('H:i') . '"';
break;
default:
$result = $result . help();
break;
}
}
else{
$result = $result . help();
}
$result = $result . '}';
echo $result;
}
else{
echo '{"error":"error to open page"}';
}
?>
3 - File "connection_nextion.lua" to execute in NodeMCU ESP8266. The modules installed in NodeMCU are (http://nodemcu-build.com/):
- file
- gpio
- http
- i2c
- mqtt
- net
- node
- ow
- pwm
- sjson
- spi
- tmr
- uart
- wifi
-- 1 to use D4 (GPIO4) --
function writeNextion(command)
uart.setup(1,9600,8,uart.PARITY_NONE,uart.STOPBITS_1,1)
uart.write(1,command)
for i=1,3 do
uart.write(1,0xff)
end
end
function connetion()
http.get('http://www.everton.mat.br/alertablu/data.php?option=node',nill,function(code,data)
if code<0 then
print("HTTP request failed\n")
else
print(code,data)
decoder=sjson.decoder()
decoder:write(data)
result = decoder:result()
print(' Data[0]: '..result['d'][1])
print('Periodo do dia[0]: '..result['p'][1])
print(' Imagem[0]: '..result['i'][1])
print(' Temperatura min.: '..result['l'])
print(' Temperatura max.: '..result['u'])
writeNextion('t0.txt="'..result['p'][1]..'"')
writeNextion('t2.txt="'..result['p'][2]..'"')
writeNextion('t4.txt="'..result['p'][3]..'"')
writeNextion('t6.txt="'..result['p'][4]..'"')
writeNextion('t1.txt="'..result['d'][1]..'"')
writeNextion('t3.txt="'..result['d'][2]..'"')
writeNextion('t5.txt="'..result['d'][3]..'"')
writeNextion('t7.txt="'..result['d'][4]..'"')
writeNextion('p0.pic='..result['i'][1])
writeNextion('p1.pic='..result['i'][2])
writeNextion('p2.pic='..result['i'][3])
writeNextion('p3.pic='..result['i'][4])
writeNextion('t10.txt="'..result['l']..'"')
writeNextion('t11.txt="'..result['u']..'"')
writeNextion('t12.txt="'..result['h']..'"')
end
end)
end
wifi.setmode(wifi.STATION)
station_cfg={}
station_cfg.ssid="Virus..."
station_cfg.pwd="victoriaHelena"
wifi.sta.config(station_cfg)
mytimer1=tmr.create()
mytimer1:register(5000,tmr.ALARM_AUTO,function(t1)
if wifi.sta.getip()~=nil then
print(wifi.sta.getip())
t1:unregister()
else
print("without ip\n")
end
end)
mytimer1:start()
connetion()
mytimer2=tmr.create()
mytimer2:register(60000,tmr.ALARM_AUTO,function(t2)
connetion()
end)
mytimer2:start()
4 - Here have images of execution
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