Modbus¶

/stm.cgi?modbus_sensor¶

Only in HW 3.5+

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

HW 3.5+ SW 1.36+HW 3.5+ SW < 1.36

GET /stm.cgi?modbus_sensor=AB

A is index of Modbus slot 1-3, integer 0-2

B is a connected module, integer 0-9, 100-104

{
    "0": "OFF",
    "1": "SDM120",
    "2": "SDM72D-M",
    "3": "RDO-PRO-X",
    "4": "Epever Tracer",
    "5": "Sofarsolar",
    "6": "GTIL",
    "7": "Danfos EKC 202C",
    "8": "SDM630/72D-v2", // added in HW 3.5+ SW 1.57
    "9": "CHINT-DTSU666", // added in HW 3.5+ SW 1.57
    "100": "custom1 (custom)",
    "101": "custom2 (custom)",
    "102": "custom3 (custom)",
    "103": "custom4 (custom)", // added in HW 3.5+ SW 1.57
    "104": "custom5 (custom)", // added in HW 3.5+ SW 1.57
}

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 HW 3.5+

Set the slave ID for the Modbus RTU sensor.

HW 3.5+ SW 1.36+HW 3.5+ SW < 1.36

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 HW 3.5+ SW 1.36

Set the mapping of Modbus and additional 1-Wire (since HW 3.5+ SW 1.57) 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 0-6, where 0 is inactive, 1-3 are Modbus modules, 4-6 are additional 1-Wire sensors) 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 HW 3.5+ 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 0-4 (0-2 till HW 3.5+ SW 1.57)
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 0-2

{
    "0": "none",
    "1": "even",
    "2": "odd", // added in SW 1.57
}

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 HW 3.5+ 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*I&mAB=C*D*E*F*G*H*I&mAB=C*D*E*F*G*H*I&mAB=C*D*E*F*G*H*I&mAB=C*D*E*F*G*H*I&&

A is a index of custom configuration, integer 0-4 (0-2 till HW 3.5+ SW 1.57)
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 0-3 (1, 10, 100 till HW 3.5+ SW 1.49)

{
    "0": "1",
    "1": "10",
    "2": "100",
    "3": "1000",
    "4": "10000", // added in HW 3.5+ SW 1.57
}

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",
}

I defines endian option, integer 0-3, added in SW 1.57

{
    "0": "no swap",
    "1": "swap byte",
    "2": "swap word",
    "3": "swap byte and word",
}

Example:

http://192.168.1.100/post.cgi?mod_custom_save

&m00=Total Power*W*2*52*4*2*0&m01=import*kWh*2*72*4*2*0&m02=export*kWh*2*74*4*2*0&m03=total energy*kwh*2*342*4*2*0&m04=set total ene*kwh*2*384*4*2*0&&

/stm.cgi?modbuson¶

Only in HW 3.5+

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