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Changes for page 2 Script

Last modified by Devin Chen on 2025/06/06 14:03
From version 38.1
edited by Hunter
on 2023/03/17 14:43
Change comment: There is no comment for this version
To version 42.1
edited by Hunter
on 2023/03/30 16:29
Change comment: There is no comment for this version

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... ... @@ -447,6 +447,20 @@
447 447  end
448 448  {{/code}}
449 449  
450 +== **1.9 High-Low Byte Switch** ==
451 +
452 +
453 +{{code language="lua"}}
454 +function highLowByteSwitch(floatNumber)
455 + addr_setfloat("@W_0#HDW23036",floatNumber,0,2)
456 + local newFloat = addr_getfloat("@W_0#HDW23036")
457 + local formattedFloat = string.format("%.2f",newFloat)
458 + print("The formatted float value is the : "..formattedFloat)
459 + return formattedFloat
460 +end
461 +{{/code}}
462 +
463 +
450 450  = **2 V-Box connect with third part server** =
451 451  
452 452  V-Box have two mode.One is for V-Net,User need to use WECON server to store data.We call this V-NET platform.
... ... @@ -474,6 +474,25 @@
474 474  
475 475  == **2.1 V-Box connect with test server(General Example)** ==
476 476  
491 +The following example is trying to publish to the topic "testtopic/test/no1/7890", and subscribe the topic "testtopic/test/no1/123456".
492 +
493 +And the JSON message is like follows:
494 +
495 +{{code language="JSON"}}
496 +{
497 + "timestamp": 1631152760,
498 + "messageId": 1,
499 + "event": "test_data",
500 + "mfrs": "HMI/box",
501 + "data":
502 + {
503 + "id" : 1436217747670454274,
504 + "waterlevel" : 48,
505 + "temperture" : 23
506 + }
507 +}
508 +{{/code}}
509 +
477 477  {{code language="lua"}}
478 478  --MQTT configuration table
479 479  local MQTT_CFG={}
... ... @@ -515,9 +515,13 @@
515 515  --initialize mqtt
516 516  function mqtt_init()
517 517   print(string.format("mqtt init mqtt_url:%s mqtt_clientid:%s", MQTT_URL, MQTT_CLIENT_ID))
551 + if g_mq then
552 + mqtt.close() --Close mqtt object
553 + end
518 518   g_mq, err = mqtt.create(MQTT_URL, MQTT_CLIENT_ID) -- create mqtt object,and declare it as a global variable
519 519   if g_mq then
520 520   g_mq:on("message", mqtt_msg_callback) -- Register a callback for receiving messages
557 + g_mq:on("offline", mqtt_msg_offline) -- Register a callback for offline
521 521   print("mqtt init success")
522 522   else
523 523   print("mqtt init failed:", err)
... ... @@ -537,6 +537,11 @@
537 537   g_mq:subscribe(SUBSCRIBE_TOPIC, 0)
538 538  end
539 539  
577 +--Offline callback function
578 +function mqtt_msg_offline(cause)
579 + print("mqtt offline, cause:", cause)
580 +end
581 +
540 540  -- Received message callback function
541 541  function mqtt_msg_callback(topic, msg)
542 542   print("topic:", topic)
... ... @@ -575,9 +575,11 @@
575 575   if g_mq:isconnected() then
576 576   send_data()
577 577   else
578 - --if exceed 20 sec not connect, reconnect once
579 - if os.time() - LAST_TIME > 20 then
620 + --if exceed 5 sec not connect, reconnect once
621 + if os.time() - LAST_TIME > 5 then
580 580   LAST_TIME = os.time()
623 + --reinitial the mqtt object
624 + mqtt_init()
581 581   --connect to mqtt or reconnect
582 582   mqtt_connect()
583 583   end