[growatt] Add missing channels for MID inverter and Smart Meter

[andrewfg]

The MID Inverter and Smart Meter device data values contain Json fields that are currently a) not mapped to fields in the binding DTO, and (therefore) b) not mapped to channels in the binding, as listed below:

MID Inverter

PV strings 3 and 4 fields (the binding currently only reports two PV strings):

• pv3voltage
• pv3current
• pv3watt
• pv4voltage
• pv4current
• pv4watt

PV phase output fields (NB check why phase #2 is mapped):

• epvtotal
• epv1today
• epv3today
• epv3total

Miscellaneous fields:

• deratingmode
• iso
• dcir
• dcis
• dcit
• gfci
• ipf
• realoppercent
• opfullwatt
• standbyflag
• warningcode
• invstartdelaytime
• bdconoffstate
• drycontactstate
• priority
• pf
• dcv

Emergency power supply fields:

• epsfac
• epsvac1
• epsiac1
• epspac1
• epsvac2
• epsiac2
• epspac2
• epsvac3
• epsiac3
• epspac3
• epspac

Battery Management Unit fields:

• bdc1_sysstatemode
• bdc1_faultcode
• bdc1_warncode
• bdc1_vbat
• bdc1_ibat
• bdc1_soc
• bdc1_vbus1
• bdc1_vbus2
• bdc1_ibb
• bdc1_illc
• bdc1_tempb
• bdc1_edischrtotal
• bdc1_echrtotal
• bdc1_flag
• bdc2_sysstatemode
• bdc2_faultcode
• bdc2_warncode
• bdc2_vbat
• bdc2_ibat
• bdc2_soc
• bdc2_vbus1
• bdc2_vbus2
• bdc2_ibb
• bdc2_illc
• bdc2_tempa
• bdc2_tempb
• bdc2_pdischr
• bdc2_pchr
• bdc2_edischrtotal
• bdc2_echrtotal
• bdc2_flag
• bms_status
• bms_error
• bms_warninfo
• bms_batterycurr
• bms_batterytemp
• bms_maxcurr
• bms_deltavolt
• bms_cyclecnt
• bms_soh
• bms_constantvolt
• bms_bms_info
• bms_packinfo
• bms_usingcap
• bms_fw
• bms_mcuversion
• bms_commtype

Smart Meter

Phase power, va, and power factor:

• app_power_l1
• app_power_l2
• app_power_l3
• react_power_l1
• react_power_l2
• react_power_l3
• powerfactor_l1
• powerfactor_l2
• powerfactor_l3

Miscellaneous fields:

• pos_act_power
• rev_act_power
• app_power
• powerfactor
• frequency

Signed-off-by: AndrewFG software@whitebear.ch

[andrewfg]

Closed via #17810