LAN DS18B20 WEB Temperature Monitor 1 meter Cable
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ESP8266: Reading Voltage from SDM120 Modbus Power Energy Meter

  http://en.trialcommand.com/blog/esp8266-slave-modbus-tcpip-no-libraries/     /* * More Tutorials: * Website http://trialcommand.com * In English: http://en.trialcommand.com * En Español: http://en.trialcommand.com */ #include <ESP8266WiFi.h> const char* ssid = “KMTRONIC”; const char* password = “12345678”; // RS485 Control pin const int RS485_control = D0; // Receive buffer long Buffer[9]; int VoltageReadCommand[] ={0x01, 0x04, 0x00, 0x00, 0x00, 0x02, 0x71, . . .

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Reading Voltage from SDM120 Modbus Power Energy Meter using KMtronic TCPRS485 bridge via PHP

  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); . . .

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KMtronic LAN WEB 8 Channel Relay board