Noah2000 - Unknown modbus function for 0PVPSCEDXXXXXXXX: 25

[mb76pl]

hi all
Since few days I'm getting "Unknown modbus function for 0PVPSCEDXXXXXXXX: 25" errors in GroBro log... I saw error 50 few times too, but it was from NEO-800.
Anyone experienced it ? Do you know what is it related to ?
Is this the reason Noah2000 doesn't send any stats to GroBro anymore ?

[criticallimit]

Can you post the log please?

[mb76pl]

I'm not sure if the message right before unknown modbus funcion is related or not, but just in case I copied it too...
But then, when the other message came, there was no other messages before it - just the "'NoneType' object has no attribute 'size'"

2025-11-11 22:02:38,644 [DEBUG] Received message (None): c/33/0PVPSCEDXXXXXXXX: b'\x00\x00\x00\x07\x01\xbe\xfe\x19w"9'271\x03@Y05DE\x11 owattGrowattGroWatpGsZwdtuvriwcGFGuoqPFGsGYwitdw"9'271\x03@Y05DE\x11 o~awFiBo}auDGyos/!8\x0brcwoFDu\VAOEGs\^DRtyGpYFaztKCVEOEB\x7f\_YU@tHrmOQtdGcWC[\x12C}B\MR\x15Nt\x13U\x0f\x19teGX\x07\x18\x0c\x11\x154\x01\x06\x04\x15\x15\x1a3\\x1c\x1fV@F+J\x0b\x11\n\x0e\x13,@\x0b\x00O\x19\r!\x00\x06\x03\x1bZ\x1a"\x06oeapCwBYwrt^/\x1d\x02\x12\x00\x07\x07.\x01\x1b\x16\x0f\x00Z4\x1aXCS\x18L#\x14\x04\r\x06\x1fF#\x05A\x1a\x18\x12\x06.\x06\x15Y\x0f\x11\x00Gfo\x7f& '\x10B_GQtaGu[YQZEiEoaap"v\_wvtuwrwwyMEtG_GQDDdBYTPCWwCLGWWDwrvwlFAr\]BTZFrGAGantLCVEOEB\x7f\_YPtoGw]BTXCGnos/!8\x0brrw`DtYrj0, _\x7frpwrFDuGBFPYEvR]E[AB}B]w-twjD[w\x07tp\x0379Ma\x03tFBo\rap0\x02$U\xbb6'
2025-11-11 22:02:38,646 [DEBUG] Received: c/33/0PVPSCEDXXXXXXXX 00 00 00 07 01 be fe 19 30 50 56 50 53 43 45 44 32 36 47 54 30 31 56 52 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 00 00 04 00 01 35 00 05 00 01 31 00 06 00 02 33 32 00 07 00 06 31 32 33 34 35 36 00 08 00 10 30 50 56 50 53 43 45 44 32 36 47 54 30 31 56 52 00 09 00 03 32 2e 30 00 0a 00 01 30 00 0b 00 04 4e 55 4c 4c 00 0c 00 0e 32 30 32 2e 39 36 2e 31 33 34 2e 31 33 33 00 0d 00 02 36 31 00 0e 00 0c 31 39 32 2e 31 36 38 2e 30 2e 34 34 00 0f 00 02 38 30 00 10 00 11 38 34 3a 66 37 3a 30 33 3a 33 61 3a 33 61 3a 78 78 00 11 00 2a 68 6f 6d 65 61 73 73 69 73 74 61 6e 74 2e 73 68 37 34 32 6c 38 64 66 6b 7a 67 6b 32 64 77 2e 6d 79 66 72 69 74 7a 2e 6e 65 74 00 12 00 04 37 30 30 36 00 13 00 2a 68 6f 6d 65 61 73 73 69 73 74 61 6e 74 2e 73 68 37 34 32 6c 38 64 66 6b 7a 67 6b 32 64 77 2e 6d 79 66 72 69 74 7a 2e 6e 65 74 00 14 00 08 47 54 53 57 30 30 30 30 00 15 00 07 34 2e 30 2e 31 2e 37 00 16 00 04 56 31 2e 30 00 17 00 01 30 00 18 00 18 39 31 33 35 30 30 30 30 30 23 30 36 23 31 37 23 30 31 23 30 36 23 30 30 00 19 00 0d 32 35 35 2e 32 35 35 2e 32 35 35 2e 30 00 1a 00 0b 31 39 32 2e 31 36 38 2e 30 2e 31 00 1b 00 05 32 35 35 2c 37 00 1c 00 04 4e 55 4c 4c 00 1d 00 01 30 00 1e 00 05 47 4d 54 2b 38 00 1f 00 13 32 30 32 35 2d 31 31 2d 31 31 20 32 32 3a 35 36 3a 30 32 00 4c 00 03 2d 36 34 00 66 00 04 44 45 56 3a 00 77 00 01 30 00 7a 00 04 44 45 56 3a cc 57
2025-11-11 22:02:38,646 [INFO] Unknown modbus function for 0PVPSCEDXXXXXXXX: 25
2025-11-11 22:02:38,646 [DEBUG] Received modbus message: None

---

2025-11-12 06:25:34,787 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:25:55,276 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:25:55,277 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:26:15,572 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:26:15,573 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:26:36,330 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:26:36,330 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:26:56,605 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:26:56,606 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:27:28,659 [INFO] Unknown modbus function for 0PVPSCEDXXXXXXXX: 25
2025-11-12 06:27:28,762 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:27:28,762 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:27:31,555 [INFO] Unknown modbus function for 0PVPSCEDXXXXXXXX: 25
2025-11-12 06:27:37,479 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:27:37,480 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:27:57,879 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:27:57,879 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:28:18,431 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:28:18,431 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:28:38,803 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:28:38,804 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:28:59,386 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:28:59,386 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:29:19,780 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:29:19,780 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-12 06:29:40,979 [WARNING] Parsing GrowattModbusBlock:
2025-11-12 06:29:40,979 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'

[robertzaage]

Our parser cant understand all types of messages. Most of them don't contain information relevant to GroBro.
In your case, the log does not look really healthy.

Is cloud-forwarding still working? Did you try to restart GroBro, MQTT broker and maybe the datalogger?

[criticallimit]

could be a "Handshake" to the growatt-server as there is the serial number, ip-adress and time stamp.

But nothing relevant for usable data.

• Key | Länge | Wert | Bedeutung
• -- | -- | -- | --
• 00 05 | 00 01 | 31 → ASCII "1" | Gerätestatus / Typcode
• 00 06 | 00 02 | 33 32 → "32" | Firmware Subversion
• 00 07 | 00 06 | 31 32 33 34 35 36 → "123456" | Seriennummer
• 00 08 | 00 10 | ... | Geräte-ID „0PVPSCED26GT01VR“
• 00 09 | 00 03 | 32 2e 30 → "2.0" | Protokollversion
• 00 0a | 00 01 | 30 | evtl. Flag „debug off“
• 00 0b | 00 04 | 4e 55 4c 4c → "NULL" | Platzhalterwert
• 00 0c | 00 0e | IP-Adresse | 202.96.134.133
• 00 0e | 00 0c | weitere IP-Adresse | 192.168.0.44
• 00 10 | 00 11 | 84:f7:03:3a:3a:xx | MAC-Adresse
• 00 11 | 00 2a | Domainname | homeassistant.sh742l8dfkzgk2dw.myfritz.net
• 00 16 | 00 04 | 56 31 2e 30 → "V1.0" | Softwareversion
• 00 1f | 00 13 | 32 30 32 35... → „2025-11-11 22:56:02“ | Zeitstempel

[robertzaage]

Yes, probably something like a heartbeat. I wouldn't be surprised, if these are used to determine if a device needs a firmware update offer.

[mb76pl]

They may have changed something, because Noah could not connect to grobro at all. After I unblocked Noah access to mqtt.growatt.com and put this hostname to Noah battery - then it connected to growatt server which I was able to verify in shineapp.
Tomorrow I'll try to force it back to connect to grobro.
Btw: it worked for more than a month: Noah was connecting to grobro with cloud connection. It's just 2-3 days ago I noticed no connection to grobro.

Also it would be sooooo good to ditch the cloud entirely and manage zero export locally only, but I wasn't able to figure out how to use smart mode locally (thread #128)

[mb76pl]

A short update:
These Unknown modbus function 25 show up when I reconfigure the device to use GroBro.
Below you can see them as I first reconfigured my NEO-800 inverter (QMN000...) and then noah2000 battery (0PVPSC...)

2025-11-14 10:16:07,253 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:16:28,252 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:16:28,252 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:17:46,993 [INFO] Unknown modbus function for QMN000XXXXXXXXXX: 25
2025-11-14 10:17:54,914 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:17:54,915 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:18:49,354 [INFO] Unknown modbus function for QMN000XXXXXXXXXX: 25
2025-11-14 10:19:14,356 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:19:14,356 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:19:20,209 [INFO] Unknown modbus function for QMN000XXXXXXXXXX: 25
2025-11-14 10:19:28,268 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:19:28,269 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:19:35,352 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:19:35,353 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:19:55,748 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:19:55,749 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:20:16,600 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:20:16,601 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:21:02,386 [WARNING] Parsing GrowattModbusBlock:
2025-11-14 10:21:02,386 [WARNING] parsing GrowattModbusMessage: 'NoneType' object has no attribute 'size'
2025-11-14 10:21:16,403 [INFO] Unknown modbus function for 0PVPSCXXXXXXXXXXX: 25

[robertzaage]

I wouldn’t interpret to much in your logs. The more interesting question is why you can’t get your NOAH connected to your local MQTT server anymore. Did you check your cert? Is it valid?