aldas
commented
1 year ago Seems that Packet::isCompleteLengthRTU is little buggy with for write* responses.
This should work for FC6 response:
->setIsCompleteCallback(static function ($binaryData, $streamIndex): bool {
return strlen($binaryData) == 8;
})FC6 RTU response has 6 bytes of data + 2 bytes for CRC https://github.com/aldas/modbus-tcp-client/blob/48c46a8327667cbe25a59a33078eff2d6d482748/src/Packet/ModbusFunction/WriteSingleRegisterResponse.php#L17-L20
root@ubuntu:/home/rkphptech# php /var/www/html/modbus-tcp-client-master/examples/write_usb_serial.php RTU Binary to sent (in hex): 0106000d0001d9c9 2023-01-25 10:12:55.876190: [debug] msg: "Connected" 2023-01-25 10:12:55.880604: [debug] msg: "Data sent", data: array ( 1 => '0106000d0001d9c9', ) 2023-01-25 10:12:55.917155: [debug] msg: "Polling data" 2023-01-25 10:12:55.917287: [debug] msg: "Stream 37 @ index: 0 received data: ", data: array ( 1 => '0106000d0001d9c9', ) An exception occurred packet length more bytes than expected #0 /var/www/html/modbus-tcp-client-master/examples/write_usb_serial.php(16): ModbusTcpClient\Utils\Packet::isCompleteLengthRTU() #1 /var/www/html/modbus-tcp-client-master/src/Network/StreamHandler.php(78): {closure}() #2 /var/www/html/modbus-tcp-client-master/src/Network/BinaryStreamConnection.php(60): ModbusTcpClient\Network\BinaryStreamConnection->receiveFrom() #3 /var/www/html/modbus-tcp-client-master/src/Network/BinaryStreamConnection.php(83): ModbusTcpClient\Network\BinaryStreamConnection->receive() #4 /var/www/html/modbus-tcp-client-master/examples/write_usb_serial.php(32): ModbusTcpClient\Network\BinaryStreamConnection->sendAndReceive() #5 {main}my code use ModbusTcpClient\Network\BinaryStreamConnection; use ModbusTcpClient\Packet\ModbusFunction\WriteSingleRegisterRequest; use ModbusTcpClient\Packet\ModbusFunction\WriteSingleRegisterResponse; use ModbusTcpClient\Packet\RtuConverter; use ModbusTcpClient\Utils\Packet;
require DIR . '/../vendor/autoload.php'; require DIR . '/logger.php';
$connection = BinaryStreamConnection::getBuilder() ->setUri('/dev/ttyUSB0') ->setProtocol('serial') ->setIsCompleteCallback(static function ($binaryData, $streamIndex): bool { return Packet::isCompleteLengthRTU($binaryData); }) ->setLogger(new EchoLogger()) ->build();