241 lines
8.7 KiB
PHP
241 lines
8.7 KiB
PHP
<?php
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declare(strict_types=1);
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class SofarWechselrichter extends IPSModule
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{
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public function Create()
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{
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// Muss immer zuerst aufgerufen werden
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parent::Create();
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// Eigenschaften (Properties) anlegen
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$this->RegisterPropertyInteger('LoggerNumber', 0);
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$this->RegisterPropertyInteger('PollInterval', 60); // Standard 60 Sekunden
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$this->RegisterPropertyString('Registers', '[]'); // JSON-String für Matrix
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// Timer für zyklisches Abfragen registrieren (wird in ApplyChanges aktiviert)
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$this->RegisterTimer('QueryTimer', 0, 'Sofar_Query($_IPS["TARGET"]);');
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}
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public function ApplyChanges()
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{
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parent::ApplyChanges();
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// PollInterval in Millisekunden umrechnen
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$intervalSec = $this->ReadPropertyInteger('PollInterval');
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$intervalMs = ($intervalSec > 0) ? $intervalSec * 1000 : 0;
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$this->SetTimerInterval('QueryTimer', $intervalMs);
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// Variablen für "Vorheriger Wert" (Register 1160) registrieren
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$this->RegisterVariableInteger('PrevValue1160', 'Vorheriger Wert', '', 10);
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// Aus der Property "Registers" JSON-String holen und in Array Decodieren
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$registers = json_decode($this->ReadPropertyString('Registers'), true);
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if (!is_array($registers)) {
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$registers = [];
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}
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// Für jeden definierten Register-Eintrag: Variable anlegen, falls nicht vorhanden
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$position = 20;
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foreach ($registers as $entry) {
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$regNo = (int) $entry['RegisterNumber'];
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$label = trim($entry['Label']);
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// Ident darf keine Sonderzeichen/Leerzeichen enthalten – wir verwenden "Reg<RegNummer>"
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$ident = 'Reg' . $regNo;
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// Falls Bezeichnung leer oder Duplicate, überspringen
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if ($regNo < 0 || $label === '') {
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continue;
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}
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// Existiert die Variable noch nicht? Dann anlegen
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if (!IPS_VariableExists(@IPS_GetObjectIDByIdent($ident, $this->InstanceID))) {
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$this->RegisterVariableFloat($ident, $label, '', $position);
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}
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$position += 10;
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}
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}
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/**
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* Timer-Callback: liest zyklisch alle definierten Register.
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*/
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public function Query(): void
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{
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$loggerNumber = $this->ReadPropertyInteger('LoggerNumber');
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if ($loggerNumber <= 0) {
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// Ohne gültige Seriennummer bringt eine Abfrage keinen Sinn
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return;
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}
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// 1) Vorherigen Wert (Register 1160) als INT16BE auslesen
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try {
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$bytes1160 = $this->readRegister($loggerNumber, 1160);
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// 'n' = unsigned 16-bit big endian
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$arr1160 = unpack('nvalue', $bytes1160);
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$raw1160 = $arr1160['value'];
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// Vorzeichenkorrektur für INT16
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if ($raw1160 & 0x8000) {
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$raw1160 -= 0x10000;
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}
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// Speichere in Variable "PrevValue1160"
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SetValue($this->GetIDForIdent('PrevValue1160'), $raw1160);
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} catch (Exception $e) {
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// Im Fehlerfall einfach in die Debug-Konsole schreiben
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$this->LogMessage('Fehler beim Lesen von Register 1160: ' . $e->getMessage(), KL_WARNING);
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}
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// 2) Tabelle auslesen und alle Einträge abfragen
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$registers = json_decode($this->ReadPropertyString('Registers'), true);
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if (!is_array($registers)) {
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return;
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}
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foreach ($registers as $entry) {
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$regNo = (int) $entry['RegisterNumber'];
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$label = trim($entry['Label']);
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$scale = (float) $entry['ScalingFactor'];
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$ident = 'Reg' . $regNo;
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if ($regNo < 0 || $label === '') {
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continue;
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}
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try {
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$bytes = $this->readRegister($loggerNumber, $regNo);
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// 'n' = unsigned 16-bit big endian
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$arr = unpack('nvalue', $bytes);
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$valueRaw = $arr['value'];
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// Skaliere
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$valueScaled = $valueRaw * $scale;
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// Schreibe in die korrespondierende Float-Variable
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SetValue($this->GetIDForIdent($ident), $valueScaled);
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} catch (Exception $e) {
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$this->LogMessage("Fehler beim Lesen von Register {$regNo}: " . $e->getMessage(), KL_WARNING);
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}
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}
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}
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/**
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* Führt eine Modbus-ähnliche Abfrage an Sofar durch und gibt genau 2 Bytes zurück.
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*
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* @param int $serial_nr Seriennummer (Logger-Nummer)
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* @param int $reg Register-Adresse (dezimal, ein einziges Register)
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* @return string Binäre Zeichenkette mit genau 2 Bytes (Registerinhalt)
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* @throws Exception Bei jeglichem Kommunikationsfehler
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*/
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private function readRegister(int $serial_nr, int $reg): string
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{
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// 1) Out_Frame ohne CRC erstellen
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$oFrame = 'a5170010450000';
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// Seriennummer in 8-stelliges Hex (jekill Byte im Little-Endian)
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$hexSN = str_pad(dechex($serial_nr), 8, '0', STR_PAD_LEFT);
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$hexSNbytes = [
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substr($hexSN, 6, 2),
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substr($hexSN, 4, 2),
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substr($hexSN, 2, 2),
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substr($hexSN, 0, 2),
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];
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$oFrame .= implode('', $hexSNbytes);
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// Data-Field (16 Hex-Zeichen konstant)
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$oFrame .= '020000000000000000000000000000';
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// Business-Field: 01 03 + Start-Register (2 Bytes) + Anzahl Register (2 Bytes = 1)
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$startHex = str_pad(dechex($reg), 4, '0', STR_PAD_LEFT);
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$numRegs = 1;
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$numHex = str_pad(dechex($numRegs), 4, '0', STR_PAD_LEFT);
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$oFrame .= '0103' . $startHex . $numHex;
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// 2) CRC16-Modbus über die letzten 6 Bytes (12 Hex-Zeichen)
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$crcInputHex = substr($oFrame, -12);
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// Hilfsfunktion: CRC16-Modbus (Init=0xFFFF, Polynom=0xA001)
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$crc16 = function(string $bin): int {
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$crc = 0xFFFF;
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$len = strlen($bin);
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for ($pos = 0; $pos < $len; $pos++) {
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$crc ^= ord($bin[$pos]);
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for ($i = 0; $i < 8; $i++) {
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if (($crc & 0x0001) !== 0) {
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$crc >>= 1;
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$crc ^= 0xA001;
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} else {
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$crc >>= 1;
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}
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}
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}
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return $crc;
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};
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$crcInputBin = hex2bin($crcInputHex);
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if ($crcInputBin === false) {
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throw new Exception("Ungültiges Hex in CRC-Input: {$crcInputHex}");
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}
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$crcValue = $crc16($crcInputBin);
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$crcHex = strtoupper(str_pad(dechex($crcValue), 4, '0', STR_PAD_LEFT));
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$crcSwapped = substr($crcHex, 2, 2) . substr($crcHex, 0, 2);
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$oFrameWithCRC = $oFrame . strtolower($crcSwapped);
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// 3) Summen-Checksum über alle Bytes ab Index 1 + End-Byte 0x15
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$l = strlen($oFrameWithCRC) / 2;
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$bArr = [];
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for ($i = 0; $i < $l; $i++) {
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$byteHex = substr($oFrameWithCRC, 2 * $i, 2);
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$bArr[$i] = hexdec($byteHex);
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}
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$crcSum = 0;
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for ($i = 1; $i < $l; $i++) {
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$crcSum += $bArr[$i];
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$crcSum &= 0xFF;
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}
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$bArr[$l] = $crcSum;
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$bArr[$l+1] = 0x15;
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$frameBin = '';
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foreach ($bArr as $b) {
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$frameBin .= chr($b);
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}
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// 4) TCP-Verbindung öffnen, Paket senden und Antwort einlesen
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$ip = '172.31.70.80';
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$port = 8899;
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$timeout = 5;
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$fp = @stream_socket_client("tcp://{$ip}:{$port}", $errno, $errstr, $timeout);
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if (!$fp) {
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throw new Exception("Verbindung zu {$ip}:{$port} fehlgeschlagen ({$errno}: {$errstr})");
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}
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fwrite($fp, $frameBin);
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stream_set_timeout($fp, 2);
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$response = '';
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while (!feof($fp)) {
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$chunk = fread($fp, 1024);
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if ($chunk === false || $chunk === '') {
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break;
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}
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$response .= $chunk;
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}
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fclose($fp);
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if ($response === '') {
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throw new Exception("Keine Antwort vom Inverter.");
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}
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// 5) Slice: Node-RED: l = 2*(reg–reg)+6 = 6. Dann slice(-l, -4) → (l–4) = 2 Bytes
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$lModbus = 2 * ($reg - $reg) + 6; // = 6
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$numBytes = $lModbus - 4; // = 2
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if (strlen($response) < $lModbus) {
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throw new Exception("Unerwartet kurze Antwort (< {$lModbus} Bytes)");
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}
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// Start vom Ende: -(lModbus), Länge = 2
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$dataBytes = substr($response, -$lModbus, $numBytes);
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if (strlen($dataBytes) < 2) {
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throw new Exception("Data-Segment < 2 Bytes.");
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}
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return $dataBytes;
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}
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}
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