Here is a Energy Meter that uses the MODBus protocol and GUI-O.
>>Init file
@sls 500
@cls
@clh
@clo
@gse COD:0 TSC:39
@guis BGC:#000000 ASR:0.449671
|IM UID:im0 X:50 Y:50 W:100 H:100 ROT:0 SHE:0 VIS:1 ACT:0 OPA:1 SCM:1 PLS:1 IP:'https://i.imgur.com/zZuSWyR.png'
|IM UID:imlcd X:50 Y:20 W:90 H:90 ROT:0 SHE:1 SHHR:2 SHVR:2 VIS:1 ACT:0 OPA:1 IP:'https://i.imgur.com/WGJpsI4.png'
|LB UID:lben X:50 Y:20.5 ALP:0 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#000000 FSZ:4 FFA:'font8' TXT:'25,101 KWh'
|LB UID:lbv X:5 Y:35 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'231.048 V'
|LB UID:lba X:5 Y:40 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'0.057 A'
|LB UID:lbw X:5 Y:45 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'7.229 W'
|LB UID:lbf X:5 Y:50 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'50.000 Hz'
|LB UID:lbp X:5 Y:55 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'PF:1.000'
|LB UID:lbw1 X:5 Y:60 ALP:1 SHE:1 SHHR:0.8 SHVR:0.8 ROT:0 FGC:#FFFFFF FSZ:3.5 FFA:'font10' TXT:'Wmax 47.046 W'
|LB UID:lb0 X:50 Y:6 ALP:0 SHE:1 ROT:0 FGC:#FFFFFF FSZ:5 FFA:'font7' TXT:'Energy Meter'
|BSR UID:bsrsh X:52 Y:78 W:95 H:27 RAD:0 OPA:0.5 BGC:#000000 SBGC:#000000 FGC:#000000 BTH:0
|CH UID:pl1 X:50 Y:77 W:95 H:27 SHE:1 VIS:1 OPA:1 PZO:1 BGC:#000000 FGC:#FFFFFF CHT:0 FSZ:1.2 SHVL:1 VLP:0 CHN:'ENERGY METER' RAD:0.5 BTH:0 LT:0.3 XTC:6 YTC:5 XMA:6 YMA:4 YLO:0 YHI:10 SHG:0 DRAT:0.90 DRA:50
|IM UID:imexit X:85 Y:95 W:14 H:14 ROT:0 SHE:1 SHHR:1 SHVR:1 VIS:1 OPA:1 SCM:2 PLS:1 IP:'https://i.imgur.com/8hDtY92.png'
|LB UID:lbms X:5 Y:95 ALP:1 SHE:1 ROT:0 FGC:#FFFFFF FSZ:2.5 FFA:'font7' TXT:'(c) gammda 2024'
@hls 200
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'4,1.7,1.1,6' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'3,3.8,2.2,8' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'3,3.4,1.8,7' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'2,3.2,1.6,4' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'4,2.3,2.2,4.5' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'5,2.2,1.6,4.8' XP:'0,0,0,0'
@pl1 PLI:'pl0,pl1,pl2,pl3' PLC:'#1ec78e,#06c1f7,#ee9e02,#cd1e2c' YP:'5.4,1.7,1.1,3.4' XP:'0,0,0,0'
InitF.txt