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Modbus

/stm.cgi?modbus_sensor

Only in LC3.5+

  • Select the module connected to the serial port (Modbus).

    GET /stm.cgi?modbus_sensor=AB
    • A is index of Modbus slot 1-3, integer 0-2

    • B is a connected module, integer 0-7, 100-102

      {
    "0": "OFF",
    "1": "SDM120",
    "2": "SDM72D-M",
    "3": "RDO-PRO-X",
    "4": "Epever Tracer",
    "5": "Sofarsolar",
    "6": "GTIL",
    "7": "Danfos EKC 202C",
    "100": "custom1 (custom)",
    "101": "custom2 (custom)",
    "102": "custom3 (custom)",
}

    Example:

    http://192.168.1.100/stm.cgi?modbus_sensor=00

    GET /stm.cgi?modbus_sensor=A

    • A is a connected module, integer 0-7

      {
    "0": "OFF",
    "1": "SDM120",
    "2": "SDM72D-M",
    "3": "RDO-PRO-X",
    "4": "Epever Tracer",
    "5": "Sofarsolar",
    "6": "GTIL",
    "7": "Danfos EKC 202C",
}

    Example:

    http://192.168.1.100/stm.cgi?modbus_sensor=0

/stm.cgi?modbusid

Only in LC3.5+

  • Set the slave ID for the Modbus RTU sensor.

    GET /stm.cgi?modbusid=AB
    • A is index of Modbus slot 1-3, integer 0-2
    • B is the ID, integer

    Example:

    http://192.168.1.100/stm.cgi?modbusid=01

    GET /stm.cgi?modbusid=A
    • A is the ID, integer

    Example:

    http://192.168.1.100/stm.cgi?modbusid=1

/stm.cgi?modbusmapping

Added in LC3.5+ SW 1.36

  • Set the mapping of Modbus readings to variables m1-m30, for use in HTTP client, MQTT client, OLED, VOLED, Power and Energy.

    GET /stm.cgi?modbusmapping=A
    • A is a list of 30 pairs of slot number (integer 0-3, 0 for disabled) and reading number (integer 0-29)

    Example:

    http://192.168.1.100/stm.cgi?modbusmapping=10*11*12*13*14*15*16*17*18*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00*00

/stm.cgi?mod_custom_set

Added in LC3.5+ SW 1.36

  • Set the custom device name and communication parameters such as bitrate, parity bit and stop bit.

    GET /stm.cgi?mod_custom_setA=B*C*D*E*F
    • A is a index of custom configuration, integer 0-2
    • B is a name, string

    • C is a bitrate, integer 0-5

      {
    "5": "4800", // added in SW 1.42b
    "0": "9600",
    "1": "19200",
    "2": "38400",
    "3": "57600",
    "4": "115200",
}

    • D is a parity bit, integer

    • E is a stop bit, integer
    • F is delay between register reads, integer (when divided by 10 equals real value in seconds), added in SW 1.40

    Example:

    http://192.168.1.100/stm.cgi?mod_custom_set0=sdm72_custom*0*0*1*1

/post.cgi?mod_custom_save

Added in LC3.5+ SW 1.36

  • Set the list of readings for a custom device, specifying name, unit, divisor, register address, function code, type for each.

    POST /post.cgi?mod_custom_save

&mAB=C*D*E*F*G*H&mAB=C*D*E*F*G*H&mAB=C*D*E*F*G*H&mAB=C*D*E*F*G*H&mAB=C*D*E*F*G*H&&
    • A is a index of custom configuration, integer 0-2
    • B is a index of reading, integer 0-29
    • C is a name of reading, string
    • D is an unit, string
    • E is a divisor, integer 1, 10, 100
    • F is a register address in decimal format, integer

    • G is a function code, integer 1-4

      {
    "1": "0x1",
    "2": "0x2",
    "3": "0x3",
    "4": "0x4",
}

    • H is a type of variable, integer 0-2

      {
    "0": "int16",
    "1": "int32",
    "2": "float",
}

    Example:

    http://192.168.1.100/post.cgi?mod_custom_save

&m00=Total Power*W*100*52*4*2&m01=import*kWh*100*72*4*2&m02=export*kWh*100*74*4*2&m03=total energy*kwh*100*342*4*2&m04=set total ene*kwh*100*384*4*2&&

/stm.cgi?modbuson

Only in LC3.5+

  • Enable the Modbus TCP Server.

    GET /stm.cgi?modbuson=A
    • A determines whether the function is enabled, integer 0-1

    Example:

    http://192.168.1.100/stm.cgi?modbuson=0
Last update: 2021-06-16
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