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Firmware upgrading (98.70)

new features of "i.75.98.70"

  1. Support mDNS.
  2. Provide a new parameter(CTCratio).
  3. provide reactive power and kvarh in modbus/tcp.

mDNS

The mDNS protocol is supported since this version.

Before: if you do not know the IP of the device,the user can only use the SSDP discovery like "How to find the the meter already connected to your router" or log in to the router to find the IP that is allocated.

Now :the energy meter can be accessed by this URL(http://sn.local) , like the below pic.

Mdns function in the energy meter

New parameter(CTCratio)

You want to monitor a balanced output with two high legs and one neutral line, but there is only phase C left now (Phase A and phase B are already used to monitor the grid of 120/240V or 120/208V).

This parameter of "CTCratio" will help you solve this problem. If it is set to '2', the energy meter`s reading of current, active power reading, and Kwh will be doubled in phase C.

Because it is a balanced output. Measure one high leg and doubling its reading would be nearly the same result as measure two high legs and sum them together.

For flere detaljer, se venligstMonitor the system of 120/240V or 120/208V in North America

WEM3080T in 120/240V or 120/208V system

Ingen. API Beskrivelse
1 /api/ctcratio inquiry the reading of ctcratio
2 /api/ctcratio?x=2 set the CTCratio to 2
3 /api/ctcratio?x=1 set the CTCratio to 1

Set the CTCratio to 2

/api/ctcratio?x=2

image-20231019114933015

Query the setting of the CTCratio

/api/ctcratio

image-20231019114243728

Different result of Phase C in different CTCratio

image-20231019115030618

Add reactive power and kvarh in modbus/tcp

The register map of the modubs/tcp is updated as below.

indeks Registreringsadresse (dec.) Registreringsadresse (Hex) register len Beskrivelse
1 0 0000 1 Fase A-spænding,ufortegn,værdi=data/100,enhed: V
2 1 0001 1 Fase A strøm,ufortegn,værdi=data/100,enhed: A
3 2 0002 2 Fase A aktiv effekt,signeret,værdi=data,enhed: W
4 4 0004 2 Fase A fremad energi,usigneret,værdi=data/800,enhed:kWh
5 6 0006 2 Fase A omvendt energi,ufortegn,værdi=data/800,enhed:kWh
6 8 0008 1 Fase A-effektfaktor,usigneret,værdi=data/1000
7 9 0009 1 model: 1:WEM3080 2:WEM3080T 3:WEM3046T 4:WEM3050T
8 10 000A 1 Fase B spænding,ufortegn,værdi=data/100,enhed: V
9 11 000B 1 Fase B strøm,ufortegn,værdi=data/100,enhed: A
10 12 000C 2 Fase B aktiv effekt,signeret,værdi=data,enhed: W
11 14 000E 2 Fase B fremad energi,usigneret,værdi=data/800,enhed:kWh
12 16 0010 2 Fase B omvendt energi,usigneret,værdi=data/800,enhed:kWh
13 18 0012 1 Fase B-effektfaktor,usigneret,værdi=data/1000
14 19 0013 1 PadB 0x00, ikke brugt
15 20 0014 1 Fase C spænding,ufortegn,værdi=data/100,enhed: V
16 21 0015 1 Fase C strøm,ufortegn,værdi=data/100,enhed: A
17 22 0016 2 Fase C aktiv effekt,signeret,værdi=data,enhed: W
18 24 0018 2 Fase C fremad energi,usigneret,værdi=data/800,enhed:kWh
19 26 001A 2 Fase C omvendt energi,usigneret,værdi=data/800,enhed:kWh
20 28 001C 1 Fase C-effektfaktor,usigneret,værdi=data/1000
21 29 001D 1 PadC 0x00, ikke brugt
22 30 001E 1 frekvens, usigneret, værdi=data/100, enhed:Hz
23 31 001F 1 padH 0x00, ikke brugt
24 32 0020 2 sum af effekt,fortegn,værdi=data,enhed:W
25 34 0022 2 sum af fremadrettet energi, usigneret, værdi=data/800, enhed:kWh
26 36 0024 2 summen af omvendt energi, uden fortegn, værdi=data/800, enhed:kwh
27 38 0026 2 Phase A reactive power, signed,value=data,unit: var
28 40 0028 2 Phase A Inductive reactive energy, unsigned,data/1000,unit: kvarh
29 42 002A 2 Phase A capacitive reactive energy, unsigned,data/1000,unit: kvarh
27 44 002C 2 Phase B reactive power, signed,value=data,unit: var
28 46 002E 2 Phase B Inductive reactive energy, unsigned,data/1000,unit: kvarh
29 48 0030 2 Phase B capacitive reactive energy, unsigned,data/1000,unit: kvarh
27 50 0032 2 Phase C reactive power, signed,value=data,unit: var
28 52 0034 2 Phase C Inductive reactive energy, unsigned,data/1000,unit: kvarh
29 54 0036 2 Phase C capacitive reactive energy, unsigned,data/1000,unit: kvarh
30 56 0038 8 serial number of the device

test the modbus/tcp function by a software

Reference

Overvåg dit solcelleanlæg med en smart WiFi-energimonitor

WEM3080T:3phase ,spilit phase ,wifi, modbus/tcp,mqtt, net energy metering,home assistant, nodered

The APIs of the Wi-Fi energy meter

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