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cFos Power Brain - HTTP API

The following functions provide a mapping of the Modbus Registers to HTTP.

Use a HTTP GET or POST request to the address of the cFos Power Brain, e.g.
http://192.168.2.111/cnf?cmd=modbus&device=meter1&read=35154.
Responses are in JSON.

  • cmd is always modbus
  • device = meter1 or meter2 or evse
  • read = address of the register to read
  • write = address of the register to read
  • value = value to write
  • values = array of values to write, e.g. [1,2,3,4]

Addresses can have a suffix to specify the data type (default is 16 bit integer):

  • d = 32 bit integer (2 modbus registers)
  • q = 64 bit integer (4 modbus registers)
  • s = string

Here are some examples, how to use the HTTP API

/cnf?cmd=modbus&device=meter1&read=8002
Response:
1

/cnf?cmd=modbus&device=meter1&read=8062d
Response:
-1

/cnf?cmd=modbus&device=meter1&read=8016s
Response:
"cFos Power Brain"

/cnf?cmd=modbus&device=meter1&read=8002&count=10
Response:
[1,257,256,0,256,0,26211,26165,11619,13366]

/cnf?cmd=modbus&device=meter2&read=all
Response:
{"8000d":-821755904,"8002":1,"8003":257,"8004":16777216,"8006":256,"8007":0,"8008s":"fcf5-c46d-310c","8016s":"cFos Power Brain","8040":41,"8041":1,"8042d":1000,"8044":1,"8045":230,"8046":230,"8047":230,"8050q":0,"8054d":0,"8056":0,"8057":0,"8058q":0,"8062d":-1,"8064d":0,"8066d":0,"8068d":0,"8070":0,"8071":0,"8120d":0}

/cnf?cmd=modbus&device=evse&write=8044&value=7
Response:
"ok"

/cnf?cmd=modbus&device=evse&write=8050q&value=1"
Response:
"ok"

/cnf?cmd=modbus&device=evse&write=8044d&value=1"
Response:
"bad modbus register size"

/cnf?cmd=modbus&device=evse&write=8044&values=[7,230,230,230 ]
Response:
"ok"