ESP8266 Mode Bridge Modbus RTU Slave – Modbus TCP IP Slave

 

Tutorial Recommended for TrialCommand.com   2017

ESP8266 Slave Modbus TCP/IP No libraries

 

Arduino Master & ESP8266 Slave Modbus RTU (TTL)

 

 

Explaining project
ESP8266 module,
1 – It is configured by your serial port Modbus RTU Slave Serial, complementing a MAX 232 chip can convert from TTL to RS232.
2 – It is set by the wireless part – WLAN is configured as Modbus Slave TCP IP through the port 502,
3 – internally in the module 20 records both Modbus TCP IP Modbus RTU as follows redirected:

  ////  Write  Modbus TCP in Modbus RTU   10 Holding Registers
  ////  Escritura de Modbus TCP en  Registros 10  Modbus RTU  
    
  regBank.set(40001,  Mb.MBHoldingRegister[0]);   
  regBank.set(40002,  Mb.MBHoldingRegister[1]);     
  regBank.set(40003,  Mb.MBHoldingRegister[2]);   
  regBank.set(40004,  Mb.MBHoldingRegister[3]); 
  regBank.set(40005,  Mb.MBHoldingRegister[4]); 
  regBank.set(40006,  Mb.MBHoldingRegister[5]); 
  regBank.set(40007,  Mb.MBHoldingRegister[6]); 
  regBank.set(40008,  Mb.MBHoldingRegister[7]);   
  regBank.set(40009,  Mb.MBHoldingRegister[8]);     
  regBank.set(40010,  Mb.MBHoldingRegister[9]);   

Modbus TCP IP –> Modbus RTU
From the Registry 10-19 Modbus TCP slave IP to records 10-19 Modbus RTU slave, all that is written from register 10 Modbus TCP slave IP registers be sent from the RTU Slave 10.

 ////  Write Modbus RTU in Modbus TCP  10 Holding Registers
  ////  Escritura de Modbus RTU en  Registros 10  Modbus TCP  

  Mb.MBHoldingRegister[10] =  regBank.get(40011);
  Mb.MBHoldingRegister[11] =  regBank.get(40012);
  Mb.MBHoldingRegister[12] =  regBank.get(40013);
  Mb.MBHoldingRegister[13] =  regBank.get(40014);
  Mb.MBHoldingRegister[14] =  regBank.get(40015);
  Mb.MBHoldingRegister[15] =  regBank.get(40016);
  Mb.MBHoldingRegister[16] =  regBank.get(40017);
  Mb.MBHoldingRegister[17] =  regBank.get(40018);
  Mb.MBHoldingRegister[18] =  regBank.get(40019);
  Mb.MBHoldingRegister[19] =  regBank.get(40020);

Run Slaves

 
     slave.run();  /// Run  Slave Modbus RTU
     Mb.Run();     /// Run Slave  Modbus TCP

 

1 ESP8266
2 Converter FTDI Serial USB
3 Regulator de 5 a 3.3v for supply ESP8266

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