JPLS-8H (Jupiter C Plus) FW V231: local→remote forwarding works, no device messages ever received

[LeanoJ]

Before you submit

• I have read the README and my question is not answered there.
• I have searched existing issues and this is not a duplicate.

Battery / device models

Marstek Jupiter Plus

Version

1.4.3

Deployment

Home Assistant add-on

B2500 MQTT configuration

Not applicable — I don't have a B2500

Are you using hm2mqtt?

Yes

What's happening?

Marstek Jupiter C Plus (JPLS-8H), firmware V231.

Hame Relay forwards App messages local→remote reliably every 60s with no errors.
No message is ever received in the opposite direction: there is not a single
"Forwarded message from remote to local" line in the log, over ~40 minutes of
continuous operation. hm2mqtt therefore reports "No response received from
24215edb1697 within timeout period" on every polling cycle.

Expected: device messages on
marstek_energy/JPLS-8H/device//ctrl to be forwarded to the local
broker so hm2mqtt can create entities. No entities are created.

The device is confirmed online and talking to the Marstek cloud:

• established TLS connection from the battery to the cloud on port 8883
  (verified on the router's connection table, hundreds of packets)
• WiFi signal -70 dBm, stable, no disconnects
• the Marstek mobile app shows live data throughout

Local MQTT (Mosquitto) is confirmed working; hm2mqtt publishes to both
hame_energy/ and marstek_energy/ prefixes and Hame Relay picks up the
hame_energy one correctly.

Suspicion: the salt-based CommonHelper.cq remote ID calculation may not match
firmware V231, so the subscription topic does not correspond to what the
device actually publishes on.

Steps to reproduce: configure Hame Relay + hm2mqtt for a JPLS-8H on FW V231
with Hame account credentials; observe outbound forwarding but no inbound.

Configuration

log_level: debug
inverse_forwarding: false
# username / password / mqtt_uri removed

Logs

Device 360111505659323435094847 (JPLS-8H): inverse_forwarding = true (automatic)
Auto-selected broker hame-2025 for device 360111505659323435094847
Device 360111505659323435094847 supports CommonHelper.cq method, using salt-based calculation
Calculated remote ID using CommonHelper.cq: 00C0i05V3Va0vVQ0s0fVw0TV for device 360111505659323435094847

Device 1:
  Name: MST_JPLS_1697
  Device ID: 360111505659323435094847
  Remote ID: 00C0i05V3Va0vVQ0s0fVw0TV
  MAC: 24215edb1697
  Type: JPLS-8H
  Version: 231
  Broker: hame-2025
  Inverse Forwarding: true
  Use Remote Topic ID: false

[hame-2025] Subscribing to local broker topics:
hame_energy/JPLS-8H/App/24215edb1697/ctrl
[hame-2025] Subscribing to remote broker topics:
marstek_energy/JPLS-8H/device/00C0i05V3Va0vVQ0s0fVw0TV/ctrl
[hame-2025] Connected to config broker
[hame-2025] Subscribed to local broker topics
[hame-2025] Connected to remote broker
[hame-2025] Subscribed to remote broker topics

[hame-2025] Matched device: 360111505659323435094847
[hame-2025] Inverse forwarding: true
[hame-2025] Target prefix: marstek_energy/
[hame-2025] Target identifier: 00C0i05V3Va0vVQ0s0fVw0TV
[hame-2025] New topic: marstek_energy/JPLS-8H/App/00C0i05V3Va0vVQ0s0fVw0TV/ctrl
[hame-2025] From: local
[hame-2025] To: remote
[hame-2025] Forwarded message from local to remote: hame_energy/JPLS-8H/App/24215edb1697/ctrl -> marstek_energy/JPLS-8H/App/00C0i05V3Va0vVQ0s0fVw0TV/ctrl

(repeats every 60s -- never any remote -> local)

--- hm2mqtt 1.8.1 ---
Published to hame_energy/JPLS-8H/App/24215edb1697/ctrl: cd=1
Published to marstek_energy/JPLS-8H/App/24215edb1697/ctrl: cd=1
Subscribed to topic: hame_energy/JPLS-8H/device/24215edb1697/ctrl
Subscribed to topic: marstek_energy/JPLS-8H/device/24215edb1697/ctrl
WARN: No response received from 24215edb1697 within timeout period
(every cycle, continuously)

[ulib68]

I am facing the same issue.

[ottelo9]

Does anyone know why Marstek has released a new firmware version for Jupiter C Plus (V231)? There are also far fewer options for selecting the CT than there were in V140.

V231 discussion in german forum.

[tester277]

I have a JPLS-8H and my actual version is: 142(.36.217.110). I know there was a final version 131. Perhaps there is a misconfiguration for hame. I see no info from logs. @LeanoJ can confirm that you have really version 231 (e.g. check in Marstek app)?

[tester277]

See also https://www.photovoltaikforum.com/thread/262798-wo-steht-die-version-der-firmware/?pageNo=3 #23. It suggests that an incorrect version number was provided (after a failed Firmware update).

[ulib68]

For your information:

I also still have a Jupiter C Plus with firmware version 231. In parallel to this discussion, I contacted Marstek support. After 30 minutes, they replied that they had provided me with new firmware version 143. I haven't been able to install it yet because I'm not at the location.

I then installed updates from tomqist (THANKS a LOT!!) for Hame Relay to version 1.5.0 and hm2mqtt to version 1.9.1 in Home Assistant.

Since then, I've been getting all the values ​​from the Jupiter C (still firmware "V231") displayed in Home Assistant.