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Changes for page 2 Script

Last modified by Devin Chen on 2025/06/06 14:03
From version 37.1
edited by Hunter
on 2023/01/03 09:36
Change comment: There is no comment for this version
To version 49.1
edited by Hunter
on 2023/05/06 10:09
Change comment: There is no comment for this version

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... ... @@ -447,6 +447,37 @@
447 447  end
448 448  {{/code}}
449 449  
450 +== **1.9 High-Low Byte Switch** ==
451 +
452 +The following example is converting the floating number from order 1234 to order 3412, and formating output the number with 2 decimal point. About which high-low word order corresponding to which value, please refer to the [[Address Operation Table>>doc:V-BOX.V-Net.Manual.04 Lua Script.01 Lua Functions.WebHome||anchor="H2Addressoperation"]].
453 +
454 +{{code language="lua"}}
455 +function highLowByteSwitch(floatNumber)
456 + addr_setfloat("@W_0#HDW23036",floatNumber,0,2)
457 + local newFloat = addr_getfloat("@W_0#HDW23036")
458 + local formattedFloat = string.format("%.2f",newFloat)
459 + print("The formatted float value is the : "..formattedFloat)
460 + return formattedFloat
461 +end
462 +{{/code}}
463 +
464 +== **1.10 Read 64bits Unsigned Value** ==
465 +
466 +In our built-in function library doesn't have the function for reading 64-bit unsigned format value, so the following function is for solve this. But if the number is greater 2^53, the precision will be lost. So the final result will be a little bit different from the original value.
467 +
468 +{{code language="lua"}}
469 +function addr_getquatra(address)
470 + local highAddress = addr_newnoaddr(address,2)
471 + local low32 = addr_getdword(address)
472 + local high32 = addr_getdword(highAddress)
473 + --print("the low number is "..low32)
474 + --print("the high number is "..high32)
475 + local formatVal = string.format("%64.0f",2^32*high32+low32)
476 + print("the format value is ".. formatVal)
477 + return formatVal
478 +end
479 +{{/code}}
480 +
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.
... ... @@ -465,8 +465,9 @@
465 465  
466 466  (% class="mark" %)2.If your server requires SSL certificate to log in,please use OpenCloud.Because only OpenCloud platform can support to upload certificate
467 467  
468 -(% class="wikigeneratedid" %)
499 +{{info}}
469 469  **✎Note: **Before program the script of MQTT, please make sure the server(MQTT broker) can be connected through MQTT Client tool.
501 +{{/info}}
470 470  
471 471  (% class="wikigeneratedid" %)
472 472  Tool link: **[[MQTT.fx>>http://mqttfx.jensd.de/index.php/download]]**
... ... @@ -473,6 +473,25 @@
473 473  
474 474  == **2.1 V-Box connect with test server(General Example)** ==
475 475  
508 +The following example is trying to publish to the topic "testtopic/test/no1/7890", and subscribe the topic "testtopic/test/no1/123456".
509 +
510 +And the JSON message is like follows:
511 +
512 +{{code language="JSON"}}
513 +{
514 + "timestamp": 1631152760,
515 + "messageId": 1,
516 + "event": "test_data",
517 + "mfrs": "HMI/box",
518 + "data":
519 + {
520 + "id" : 1436217747670454274,
521 + "waterlevel" : 48,
522 + "temperture" : 23
523 + }
524 +}
525 +{{/code}}
526 +
476 476  {{code language="lua"}}
477 477  --MQTT configuration table
478 478  local MQTT_CFG={}
... ... @@ -514,9 +514,13 @@
514 514  --initialize mqtt
515 515  function mqtt_init()
516 516   print(string.format("mqtt init mqtt_url:%s mqtt_clientid:%s", MQTT_URL, MQTT_CLIENT_ID))
568 + if g_mq then
569 + mqtt.close() --Close mqtt object
570 + end
517 517   g_mq, err = mqtt.create(MQTT_URL, MQTT_CLIENT_ID) -- create mqtt object,and declare it as a global variable
518 518   if g_mq then
519 519   g_mq:on("message", mqtt_msg_callback) -- Register a callback for receiving messages
574 + g_mq:on("offline", mqtt_msg_offline) -- Register a callback for offline
520 520   print("mqtt init success")
521 521   else
522 522   print("mqtt init failed:", err)
... ... @@ -536,6 +536,11 @@
536 536   g_mq:subscribe(SUBSCRIBE_TOPIC, 0)
537 537  end
538 538  
594 +--Offline callback function
595 +function mqtt_msg_offline(cause)
596 + print("mqtt offline, cause:", cause)
597 +end
598 +
539 539  -- Received message callback function
540 540  function mqtt_msg_callback(topic, msg)
541 541   print("topic:", topic)
... ... @@ -574,9 +574,11 @@
574 574   if g_mq:isconnected() then
575 575   send_data()
576 576   else
577 - --if exceed 20 sec not connect, reconnect once
578 - if os.time() - LAST_TIME > 20 then
637 + --if exceed 5 sec not connect, reconnect once
638 + if os.time() - LAST_TIME > 5 then
579 579   LAST_TIME = os.time()
640 + --reinitial the mqtt object
641 + mqtt_init()
580 580   --connect to mqtt or reconnect
581 581   mqtt_connect()
582 582   end