Tasmota smart meter interface Landis+Gyr T550 MQTT record always 0

[jjeb-de]

Hi everybody,

I am stuck with the following problem and appreciate some help.

I have a smart meter Landis+Gyr T550 with an optical interface. My reading device is bitshake smart meter reader air with tasmota version 13.
I created a script based on a template, see following
script.txt

dumping the received data looks quite ok, see following
result.txt

But the MQTT record sent to my MQTT broker contains all zeros, see following
mqtt.txt

Any idea, what could be the reason for this behaviour?

Thanks in advance.

[gemu2015]

it seems that this meter does not emit a CR after each value. thus it can not be used in "line mode" which is default
try switching to shift mode by adding this line to the descriptor
1,=so2,0

[jjeb-de]

Hi gemu2015,

Thanks for your fast feedback. I just changed the descriptor setting according your proposal, now I understand the chapter special commands in the smart meter interface description.

[jjeb-de]

Hi gemu2015,

sorry for the late response, works perfect, thanks

[Mart-Muc]

hi JJeb-de

Kannst du bitte das ganze und funktionierende Script uploaden- ich kann leider mit gemu2015s Anweisung nix anfangen, sorry.

Danke

[jjeb-de]

hier das script wie es bei mir nun läuft:

---

D
scnt=0
res=0

B
;reset device interface
->sensor53 r
;disable publishing at MQTT teleperiod, on boot
smlj=0

S
;re-enable publishing at MQTT teleperiod, on 10 seconds of up-time
if upsecs>10
then
smlj|=1
endif

F
; 100ms iteration
scnt+=1

;actions
switch scnt
;start after 1.6 seconds (16 x 100ms)
case 16
;set transfer speed to 300 baud
res=sml(1 0 300)
;trigger meter by sending 40 times 'NUL' followed by '/?! CR LF'
res=sml(1 1 "0000000000000000000000000000000000000000")
res=sml(1 1 "0000000000000000000000000000000000000000")
res=sml(1 1 "2F3F210D0A")
case 32
;request transfer speed by sending 'ACK 0 x 0 CR LF'
; x hex baud
; '0' = 30 = 300
; '1' = 31 = 600
; '2' = 32 = 1200
; '3' = 33 = 2400
; '4' = 34 = 4800
; '5' = 35 = 9600
; '6' = 36 = 19200
; '7' = 37 = 38400
; '8' = 38 = 76800
; '9' = 39 = 115200
;transfer speed 2400 baud
res=sml(1 1 "063033300D0A")
res=sml(1 0 2400)
;restart sequence after 10 minutes (6000 x 100 ms)
case 6000
scnt=0
ends

;parse and store
; Device: Landis+Gyr T550 (UH50)
; Protocol: OBIS Ascii line shift mode
; Serial setting: 2400@7E1 for OBIS Ascii,

M 1
+1,5,o,0,2400,LGUH50,4
1,=so2,0
1,6.8(@1,Zählerstand,MWh,mwh_count,3
1,6.6(@1,Max Heizleistung,kWh,kwh_max_heatperf,1
1,6.26(@1,Durchlauf,m³,m3_throughput,2
1,6.33(@1,Max Durchlauf per h,m³h,m3h_max_throughput,3
;1,9.4(@#),Max Temp VR-Lauf,°C,c_max_temp_frw,0
1,9.4(@1,Max Temp V-Lauf,°C,c_max_temp_fw,1
1,9.4(@s&1:1,Max Temp R-Lauf,°C,c_max_temp_rw,1

---