Reading Voltage from SDM120 Modbus Power Energy Meter using TCP<>RS485 bridge via PHP. Bridge IP : 192.168.1.199 Bridge PORT : 9761 SDM120 Energy Meter Speed: 2400/8/N/1 PHP file <?php function hexTo32Float($strHex) { $v = ($strHex); $x = ($v & ((1 << 23) – 1)) + (1 << 23) * ($v >> 31 | 1); . . .
Ethernet Modbus IP 8 channels Modbus/TCP LAN Relay board PHP code for STATUS Read WEB Relay board connected to IP: 192.168.1.199 PORT:80 USER: admin PASSWORD: admin Create a new file. <?php $url = “http://192.168.1.199:80/status.xml”; $username = “admin”; $password = “admin”; //open connection $ch = curl_init(); //set the url, number of POST vars, . . .
Kmtronic TCP Relay Kmtronic TCP Relay library. 8 Channels RelayLib.php main library status.php generate json output with the status and name of each relay changestatus.php Example to toggle relay status https://github.com/ayasystems/KmtronicTCPRelay . . .
Commands: sudo fdisk -l sudo mkdir /media/external sudo mount -t vfat /dev/sdb1 /media/external -o uid=1000,gid=1000,utf8,dmask=027,fmask=137 1. “sudo fdisk -l” before connect USB drive 2. “sudo fdisk -l” with connected USB drive 3. sudo mkdir /media/external sudo mount -t vfat /dev/sdb1 /media/external -o uid=1000,gid=1000,utf8,dmask=027,fmask=137 4. Play 1.mp3 sound from USB folder /music/ <?php $ret . . .
PHP code for STATUS Read WEB Relay board connected to IP: 192.168.1.199 PORT:80 USER: admin PASSWORD: admin 1. Create a new file. <?php $url = “http://192.168.1.199:80/status.xml”; $username = “admin”; $password = “admin”; //open connection $ch = curl_init(); //set the url, number of POST vars, POST data curl_setopt($ch,CURLOPT_URL,$url); curl_setopt($ch, CURLOPT_USERPWD, “$username:$password”); //execute post $result . . .
