gemu2015
commented
9 months ago this is already implemented. i once wanted to adapt my GROWATT inverter to the german 70 percent rule and startet with this MODBUS slave. However this rule is no longer needed, so i did not further test it. here is my initial script for the slave mode. that did work but will certainly need some tweaking
remark: in this example the slave gets its input values from global variables.
needs #define USE_SCRIPT_SERIAL
>D 64
IP=192.168.188.99
; simulate eastron sdm modbus meter
res=0
m:req=0 8
m:resp=0 128
addr=1
regs=0
; maximum allowed export with 10,35 kw modules
limit=7250
; aktueller verbrauch bzw einspeisung
g:zwzc=0
g:zwzi=0
g:zwzo=0
; udp timeout timer
t:udpt=30
col="green"
>BS
res=0
res=so(18 19 9600 8N1 1024)
print open %res%
->setsensor127 0
>G
; reset udp timer
udpt=60
>F
res=sa()
if res>0
then
;print res=%res%
res=sra(req)
print request = %req[1]% - %req[2]% - %req[3]% - %req[4]% - %req[5]% - %req[6]%
delay(10)
; slave adress
; function code
; start adress Hi
; start adress Lo
; np Hi
; np Lo
; crc Lo
; crc Hi
regs=req[6]/2
resp[1]=0
resp[2]=0
resp[3]=0
resp[4]=0
resp[5]=0
resp[6]=0
resp[7]=0
resp[8]=0
resp[9]=0
resp[10]=0
if res==8
and req[1]==addr
and req[2]==4
and req[3]==0
and req[4]==0 {
print Reg 0 7
; report 230 Volts, current, watts, va
resp[1]=230
resp[2]=0
resp[3]=0
resp[4]=2
resp[5]=0
resp[6]=0
resp[7]=abs(zwzc)
smw(addr 3 resp regs)
}
if res==8
and req[1]==addr
and req[2]==4
and req[3]==0
and req[4]==70 {
print Reg 0x46 5
;frequency 0x46, total import, total export, total imp kva, total export kva
resp[1]=50
resp[2]=zwzo
resp[3]=zwzi
resp[4]=zwzo
resp[5]=zwzi
smw(addr 3 resp regs)
}
if res==8
and req[1]==addr
and req[2]==4
and req[3]==1
and req[4]==86 {
print Reg 0x156 2
; report total kwh, kvarh
resp[1]=zwzo
resp[2]=zwzo
smw(addr 3 resp regs)
}
if res==8
and req[1]==addr
and req[2]==4
and req[3]==0
and req[4]==18 {
print Reg 0x12 7
; p1 voltamps 0x12, voltamps reactive
resp[1]=abs(zwzc)
resp[2]=0
resp[3]=0
resp[4]=abs(zwzc)
resp[5]= 0
resp[6]= 0
resp[7]=1
smw(addr 3 resp regs)
}
endif
>S
; upd timeout
if udpt==0 {
gvr
udpt=-1
}
if zwzc<0
then
col="green"
else
col="red"
endif
>W
ZRZ total Verbrauch: {m}<span style="color:red;">%0zwzi% W</span>
ZRZ total Einspeisung: {m}<span style="color:green;">%0zwzo% W</span>
ZRZ akt Verbrauch/Einspeisung: {m}<span style="color:%col%;">%0zwzc% W</span>
pkkrusty
Pewibe
Have you looked for this feature in other issues and in the docs?
Is your feature request related to a problem? Please describe.
Possibility of tasmota device acting as MODBUS slave. If it can be assigned a slave ID and and the function return data from an array, could even happen without user input.
Describe the solution you'd like
User enters slave ID (or even slave ID as array[1], then all registers in the array depending on size defined.
Describe alternatives you've considered
Would allow for long distance two-wire communication between tasmota devices on a single bus.
Additional context
Add any other context or screenshots about the feature request here.
(Please, remember to close the issue when the problem has been addressed)