Flash Speicher Totschreiben ?

[azazul1980]

Question

Hallo,

ich habe nun bei meinen B2500 Mqtt freigeschaltet und Reguliere diese über Homeassistant. Ist es richtig das der number.accu_1_mqtt_time_period_1_output_value. Beschrieben werden darf und nicht den Flash irgend wann tot schreibt wie es bei der ESP Variante ist?

Device Model (optional)

No response

Firmware Version (optional)

No response

[tomquist]

Standardmäßig werden alle commands die es unterstützen (und dazu gehört der genannte) so geschickt, dass sie nicht auf den Flash schreiben, außer der Schalter "Use Flash Commands" wird aktiviert.

[EhManuel]

Hallo,

ich bin noch recht neu mit HomeAssistant und MQTT unterwegs, daher bitte ich um Nachsicht bei folgender Frage:
Woran sehe ich, welche Commands RAM-Schreiben (statt Flash) unterstützen und welche nicht?

In meinem Fall möchte ich gern den command _hm2mqtt/HMJ-2/control/{device_mac}/time-period/[1-5]/output-value_ verwenden, um alle 30s oder 60s die Akku-Ausgangsleistung an den tatsächlichen Verbrauch im Haus anzupassen.

Mir ist nicht klar, ob dieser Weg für den B2500D (HMJ-2, laut Marstek-Support 4. Generation) mit Firmware v116.6 zum Schreiben in Flash oder RAM führt.

[FrankH1]

Standardmäßig werden alle commands die es unterstützen (und dazu gehört der genannte) so geschickt, dass sie nicht auf den Flash schreiben, außer der Schalter "Use Flash Commands" wird aktiviert.

Müssten dann nicht die geänderten Werte beim Restart des B2500 verschwinden und die ursprünglich im Zeitplan festgelegten Werte wieder geladen werden? Bei mir ändert sich nach einem restart des B2500 nichts (per app oder per MQTT command) - hat vielleicht Marstek diese non-flash variante aus der Firmware genommen? Oder ist restart nur ein Teil des B2500 (z.B. Comm-interface) und einiges verbleibt unverändert?

[Commifreak]

Darf ich fragen wie dein Script (Nulleinspeisung?) aussieht? Rein Interesse halber

[EhManuel]

Hallo Commifreak,

hier mein recht einfaches Skript:

alias: PseudoNulleinspeisung
description: ""
triggers:
  - trigger: time_pattern
    seconds: /30
conditions:
  - condition: state
    entity_id: input_boolean.schalter_batterie_automatisierung
    state:
      - "on"
actions:
  - if:
      - type: is_battery_level
        condition: device
        device_id: meineDevice_id
        entity_id: meineEntity_id
        domain: sensor
        above: 11
    then:
      - data:
          qos: 0
          payload: "  {{ [50, [610, (states('sensor.zeitliche_statistik_gesamtleistungsbedarf') | int * 0.95) | int] | min] | max }}"
          topic: hm2mqtt/HMJ-2/control/ADRESSE/time-period/1/output-value
        action: mqtt.publish
        enabled: true
      - action: mqtt.publish
        metadata: {}
        data:
          evaluate_payload: false
          qos: 0
          retain: true
          topic: hm2mqtt/HMJ-2/control/ADRESSE/surplus-feed-in
          payload: "on"
    else:
      - data:
          topic: hm2mqtt/HMJ-2/control/ADRESSE/time-period/1/output-value/
          qos: 0
          payload: "80"
        action: mqtt.publish
        enabled: true
      - action: input_number.set_value
        metadata: {}
        target:
          entity_id: input_number.nulleinspeisung_akku_output_soll
        data:
          value: >
            {{states('sensor.limited_zeitliche_statistik_gesamtleistungsbedarf')
            |   float(0)*0.95 | round(0)}}
mode: single

sensor.zeitliche_statistik_gesamtleistungsbedarf ist dabei eine zeitlich, gemittelt über 2min.

[FrankH1]

Hi there,
I'm using a B2500 as well and having trouble with a stable connection to the "CT", so decided as well to use manual discharge and using the timer-output to control the output power and come close to a zero feed into main grid.
I controlled until now the B 2500 via the Hame cloud (hame-relay/hm2mqtt) and as I got the same info from tomquist (re writing to flash) checked if the changed value stays in the B2500 after restart. It stayed. So I thought it could be because the Hame-cloud is inbetween and doesnt use "non flash" MQTT commands. So I risked today to change to local MQTT and repointed the B2500 to work with the local MQTT server directly.
I must say - its the same. I can set the output value of a given timer from my home-automation using MQTT. Its reflected quite fast in the Marstek app and causes quickly a change of the output power, so its working. If I reset the B2500 this value stays - so it obviously writes to flash. Checked this several times and checked if the useFlashCommands is unset..
{"useFlashCommands":false,"deviceType":"HMJ-2","deviceId":"18cedfd2292b","timestamp":"2026-07-06T15:37:40.314Z","values":{"p1":"1","p2":"1","w1":"26","w2":"28","pe":"55","vv":"116","sv":"6","cs":"0","cd":"0","am":"0","o1":"1","o2":"1","do":"90","lv":"80","cj":"2","kn":"1232","g1":"40","g2":"40","b1":"0","b2":"0","md":"0","d1":"1","e1":"0:0","f1":"19:59","h1":"80","d2":"1","e2":"20:0","f2":"22:59","h2":"200","d3":"1","e3":"23:0","f3":"23:59","h3":"80","sg":"0","sp":"80","st":"0","tl":"25","th":"25","tc":"0","tf":"0","fc":"202405151335","id":"5","a0":"55","a1":"0","a2":"0","l0":"1","l1":"0","c0":"0","c1":"4","bc":"471","bs":"665","pt":"1282","it":"1286","m0":"0","m1":"0","m2":"0","m3":"80","d4":"0","e4":"0:0","f4":"23:59","h4":"400","d5":"0","e5":"0:0","f5":"23:59","h5":"800","lmo":"1917","lmi":"1418","lmf":"0","uv":"107","sm":"0","bn":"0","ct_t":"4","tc_dis":"1","ws":"-59","fktc":"0"},"batteryPercentage":55,"batteryCapacity":1232,"dischargeDepth":90,"solarInputStatus":{"input1Charging":true,"input1PassThrough":false,"input2Charging":true,"input2PassThrough":false},"solarPower":{"input1":26,"input2":28,"total":54},"deviceInfo":{"deviceVersion":116,"deviceSubversion":6,"fc42dVersion":"202405151335","deviceIdNumber":5,"bootloaderVersion":107},"outputState":{"output1":true,"output2":true},"outputPower":{"output1":40,"output2":40,"total":80},"temperature":{"min":25,"max":25,"chargingAlarm":false,"dischargeAlarm":false},"batteryPacks":{"pack1Connected":false,"pack2Connected":false},"scene":"dusk","batteryStatus":{"host":{"discharging":true,"charging":false,"depthOfDischarge":false,"undervoltage":false},"extra2":{"discharging":false,"charging":false,"depthOfDischarge":false,"undervoltage":false},"extra1":{"discharging":false,"charging":false,"depthOfDischarge":false,"undervoltage":false}},"batteryCapacities":{"host":55,"extra1":0,"extra2":0},"batteryOutputThreshold":80,"chargingMode":"chargeDischargeSimultaneously","adaptiveMode":false,"timePeriods":[{"enabled":true,"startTime":"00:00","endTime":"19:59","outputValue":80},{"enabled":true,"startTime":"20:00","endTime":"22:59","outputValue":200},{"enabled":true,"startTime":"23:00","endTime":"23:59","outputValue":80},{"enabled":false,"startTime":"00:00","endTime":"23:59","outputValue":400},{"enabled":false,"startTime":"00:00","endTime":"23:59","outputValue":800}],"dailyStats":{"batteryChargingPower":471,"batteryDischargePower":665,"photovoltaicChargingPower":1282,"microReverseOutputPower":1286},"ctInfo":{"connected":false,"automaticPowerSize":80,"transmittedPower":0,"connectedPhase":0,"status":"notInDiagnosis","phase1":0,"phase2":0,"phase3":0,"microInverterPower":80},"ratedPower":{"output":1917,"input":1418,"isLimited":false},"surplusFeedInEnabled":false}

Something else what could be done?
Cheers Frank