Changes for page 01 Lua Functions

Last modified by Theodore Xu on 2023/10/26 10:51

From 5.11 to 5.12

From version 5.12

edited by Stone Wu
on 2022/07/12 09:40

Change comment: (Autosaved)

To version 21.1

edited by Theodore Xu
on 2023/10/26 10:51

Change comment: There is no comment for this version

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@@ -1,1 +1,1 @@
--V-BOX.V-Net.1\.User Manual.04 Lua Script.WebHome
++V-BOX.V-Net.Manual.04 Lua Script.WebHome

Author

@@ -1,1 +1,1 @@
--XWiki.Stone
++XWiki.AiXia

Content

@@ -140,7 +140,7 @@
   Table 2-1
--(% class="box errormessage" %)
++(% class="box infomessage" %)
  (((
  **✎Note: **If HLword enters any other value, it will be treated as invalid.
  )))
@@ -608,11 +608,12 @@
  Attempting to use a script to open a serial port in an unsupported mode will result in an error directly, as below.
  |(((
++{{code language="LUA"}}
  local setup = {
  name = "COM2",
--mode = 422, ~-~- COM2 does not support RS422
++mode = 422, -- COM2 does not support RS422
  ...
@@ -619,6 +619,7 @@
  }
  serial.open(setup)
++{{/code}}
  )))
  **Data bit:**
@@ -1063,8 +1063,9 @@
  If there is no custom configuration, return an empty table, otherwise, return with "field name/field content"
--E.g:
++**For example:**
++{{code language="LUA"}}
  {
  [1]= {[1]=1234, [2]=1, [3]='temp', [4]='23.5', [5]={"fruit"="apple"}},
@@ -1077,7 +1077,8 @@
  }
--Failed: //table// empty table
++Failed: table empty table
++{{/code}}
  (((
  == **bns_get_config(string from)** ==
@@ -1157,13 +1157,15 @@
  Type (1: switch, 2: number, 3: string)
--E.g:
-- {
++**For example:**
--[1]={~-~-The first communication port
++{{code language="LUA"}}
++{
--[1]={~-~-monitoring point array of the first communication port
++[1]={--The first communication port
++[1]={--monitoring point array of the first communication port
++
  [1]={[1]=11,[2]='data1',[3]=3,[4]=2},
  [2]={[1]=12,[2]='data2',[3]=3,[4]=2},
@@ -1170,23 +1170,23 @@
  ...
--[n]={[1]=xx,[2]='datan',[3]=x,[4]=x},~-~-n monitoring points
++[n]={[1]=xx,[2]='datan',[3]=x,[4]=x},--n monitoring points
  },
--[2]=14, ~-~-ID
++[2]=14, --ID
--[3]='Modbus TCP' ~-~-n monitoring points
++[3]='Modbus TCP' --n monitoring points
  },
--[2]={~-~-The second communication port
++[2]={--The second communication port
--[1]={},~-~-The monitoring point of the second communication port is not configured and is empty
++[1]={},--The monitoring point of the second communication port is not configured and is empty
--[2]=15, ~-~-ID
++[2]=15, --ID
--[3]='WECON' ~-~-communication protocol name
++[3]='WECON' --communication protocol name
  },
@@ -1193,6 +1193,7 @@
  ...n communication ports and so on
  }
++{{/code}}
  Failed~:// table// empty table
@@ -1272,8 +1272,9 @@
  Succeed: //table// one-dimensional array
--E.g:
++**For example:**
++{{code language="LUA"}}
  {
  [1]="This is the oldest message", - the first is the oldest message
@@ -1285,6 +1285,7 @@
  [n]="This is the latest message", - the last is the latest message
  }
++{{/code}}
  Failede: nil
@@ -1302,7 +1302,7 @@
  == **https request** ==
--Example：
++**For example:**
  {{code language="LUA"}}
  local json = require("json")
@@ -1347,188 +1347,19 @@
  {{/code}}
  (((
--= **8 Internal register** =
++
  )))
--The internal registers of the box are divided into bit addresses and word addresses, which can be accessed in two ways (taking HDW as an example):
--
--**Access by word, prefix @W_HDW.**
--
--For example: @W_HDW0 represents the first word of the system data area, @W_HDW1 represents the second word of the system data area.
--
--**Access in bit mode, the prefix is @B_HDX, the number in front of "." indicates the number of the word, and the number behind is the bit number of the word.**
--
--For example: @B_HDX1020.12, its meaning is to access the system data area in bit mode, the specific location is the 13th bit of the 1020th word.
--
--(% class="box errormessage" %)
  (((
--**✎Note: **
++= **8 General Functions** =
  )))
--* The address in @B_HDX is taken from the word in @W_HDW, so pay special attention when using the address.
--** For example, @B_HDX1020.12 is to access the 13th bit of the 1020th word. The value of this bit is the same as the word obtained by @W_HDW001020. The 13th bit of this word is actually the same bit as @B_HDX1020.12.
--* The address of the bit address @B_HDX has a decimal point, while the word address is an integer.
--
  (((
--== **Data storage area（HDW/HDX）** ==
++== **send_sms_ira(string number, string message)** ==
  )))
--The system storage area (HDW) of the V-BOX is used to store temporary data:
++**Function:** Use IRA character set to send English text messages
--1. Access by word, the number range is: "@W_HDW0"-"@W_HDW299999".
--1. Access in bit mode, the number range is: "@B_HDX0.0"-"@B_HDX299999.15".
--
--(((
--== **8.2 Special data area (HSW/HSX)** ==
--)))
--
--**✎Note: **
--
--//HSW// is a system special register, so please refer to the system special register table during use. Do not use addresses that are not mentioned in the table, and use the addresses stated in the table with caution (example: restart ("@W_HSW0") Writing a value of 1 will cause V-BOX to restart).
--
--//Without any conditions. Direct use ("@W_HSW0") will cause the V-BOX to restart continuously.// When using ("@W_HSW0") address, please add judgment conditions, such as: connection to MQTT fails, there is no network, the value of a PLC address meets the condition or counts to a certain value.
--
--1.The system data area (HSW) of the box is used for system special registers (system reserved). Use //addr_getword// to obtain the following register information:
--
--(% class="table-bordered" %)
--|address|function|Read and write status: read only, write only, read and write
--|@W_HSW0|restart|read and write
--|@W_HSW1|Box time: year|read and write
--|@W_HSW2|Box time: month|read and write
--|@W_HSW3|Box time: day|read and write
--|@W_HSW4|Box time: hour|read and write
--|@W_HSW5|Box time: minute|read and write
--|@W_HSW6|Box time: second|read and write
--|@W_HSW7|Box time: week|read and write
--|@W_HSW8|Ethernet IP1|read only
--|@W_HSW9|Ethernet IP2|read only
--|@W_HSW10|Ethernet IP3|read only
--|@W_HSW11|Ethernet IP4|read only
--|@W_HSW12|Ethernet Mask 1|read only
--|@W_HSW13|Ethernet Mask 2|read only
--|@W_HSW14|Ethernet Mask 3|read only
--|@W_HSW15|Ethernet Mask 4|read only
--|@W_HSW16|Ethernet Gateway 1|read only
--|@W_HSW17|Ethernet Gateway 2|read only
--|@W_HSW18|Ethernet Gateway 3|read only
--|@W_HSW19|Ethernet Gateway 4|read only
--|@W_HSW21|Ethernet MAC1|read only
--|@W_HSW22|Ethernet MAC2|read only
--|@W_HSW23|Ethernet MAC3|read only
--|@W_HSW24|Ethernet MAC4|read only
--|@W_HSW25|Ethernet MAC3|read only
--|@W_HSW26|Ethernet MAC4|read only
--|@W_HSW128|WIFI IP1|read only
--|@W_HSW129|WIFI IP2|read only
--|@W_HSW130|WIFI IP3|read only
--|@W_HSW131|WIFI IP4|read only
--|@W_HSW132|WIFI Mask 1|read only
--|@W_HSW133|WIFI Mask 2|read only
--|@W_HSW134|WIFI Mask 3|read only
--|@W_HSW135|WIFI Mask 4|read only
--|@W_HSW136|WIFI Gateway 1|read only
--|@W_HSW137|WIFI Gateway 2|read only
--|@W_HSW138|WIFI Gateway 3|read only
--|@W_HSW139|WIFI Gateway 4|read only
--|@W_HSW140|WIFI MAC1|read only
--|@W_HSW141|WIFI MAC2|read only
--|@W_HSW142|WIFI MAC3|read only
--|@W_HSW143|WIFI MAC4|read only
--|@W_HSW144|WIFI MAC5|read only
--|@W_HSW145|WIFI MAC6|read only
--|@W_HSW146|WIFI Signal value|read only
--|@W_HSW148|4G IP1|read only
--|@W_HSW149|4G IP2|read only
--|@W_HSW150|4G IP3|read only
--|@W_HSW151|4G IP4|read only
--|@W_HSW152|4G Mask 1|read only
--|@W_HSW153|4G Mask 2|read only
--|@W_HSW154|4G Mask 3|read only
--|@W_HSW155|4G Mask 4|read only
--|@W_HSW156|4G Gateway 1|read only
--|@W_HSW157|4G Gateway 2|read only
--|@W_HSW158|4G Gateway 3|read only
--|@W_HSW159|4G Gateway 4|read only
--|@W_HSW160|4G MAC1|read only
--|@W_HSW161|4G MAC2|read only
--|@W_HSW162|4G MAC3|read only
--|@W_HSW163|4G MAC4|read only
--|@W_HSW164|4G MAC5|read only
--|@W_HSW165|4G MAC6|read only
--|@W_HSW166|4G Signal value|read only
--
--2. Other
--
--2.1 Access password: addr_getstring("@W_HSW27", 16)
--
--2.2 Machine code: addr_getstring("@W_HSW60", 64)
--
--2.3 Positioning method (@W_HSW167): (read only)
--
--~1. Latitude and longitude
--
--Longitude: addr_getdouble("@W_HSW168") (read only)
--
--Latitude: addr_getdouble("@W_HSW172") (read only)
--
--2. Base station positioning
--
--LAC: addr_getdword("@W_HSW168") (read only)
--
--CI: addr_getdword("@W_HSW172") (read only)
--
--2.4 Convert base station to latitude and longitude via API
--
--Longitude: addr_getdouble("@W_HSW187") (read only)
--
--Latitude: addr_getdouble("@W_HSW183") (read only)
--
--2.5 Operator information: addr_getdword("@W_HSW181") (read only)
--
--2.6 Networking mode: addr_getword("@W_HSW177") (read only)
--
--0: Ethernet, 1: WIFI, 2: 4G, 3: 2G
--
--2.7 Map fence flag: addr_getword("@W_HSW178") (read only)
--
--0: No map fence is drawn
--
--1: Draw a map fence and the box is in the fence
--
--2: Draw a map fence and the box is not in the fence
--
--2.8 SIM card status addr_getword("@W_HSW179") (read only)
--
--1: No card detected
--
--2: Card insertion detected
--
--3: The card status is abnormal
--
--2.9 MQTT status addr_getword("@W_HSW180") (read only)
--
--1: online, 2: offline
--
--2.10 IO interface, X is read only, Y is read and write (H series)
--
--addr_getbit(addr1), addr_setbit(addr2)
--
--addr1:"@B_Y0" "@B_Y1" "@B_X0" "@B_X1"
--
--addr2:"@B_Y0" "@B_Y1"
--
--(((
--= **9 General Functions** =
--)))
--
--(((
--== **9.1 send_sms_ira(string number, string message)** ==
--)))
--
--**Function:**
--
--Use IRA character set to send English text messages
--
  **Parameters:**
  //number: //number (up to 32 characters, the excess will be discarded)
@@ -1542,7 +1542,7 @@
  Failed: multi
  (((
--== **9.2 send_sms_ucs2(string number, string message)** ==
++== **send_sms_ucs2(string number, string message)** ==
  )))
  **Function:**
@@ -1562,13 +1562,11 @@
  Failed: multi
  (((
--== **9.3 sms_get_state(number id)** ==
++== **sms_get_state(number id)** ==
  )))
--**Function:**
++**Function:** Get the status of the SMS
--Get the status of the SMS
--
  **parameter:**
  //id~:// SMS corresponding id
@@ -1580,13 +1580,11 @@
  Failed: multi
  (((
--== **9.4 jwt_encode(table head, table payload, string aud, number iat, number exp, string key, int jwttype)** ==
++== **jwt_encode(table head, table payload, string aud, number iat, number exp, string key, int jwttype)** ==
  )))
--**Function:**
++**Function:** Convert data to JWT format
--Convert data to JWT format
--
  **parameter:**
  //aud: //project name
@@ -1631,19 +1631,20 @@
  //key~:// the private key required for encryption
--For example:
++**For example:**
++{{code language="LUA"}}
  function jwt.main()
--local PRIVATE_KEY = ~[~[~-~- Please enter the secret key~-~-]]
++local PRIVATE_KEY = [[-- Please enter the secret key--]]
  local JWTType=0
--local payload = ~{~{key="test1",value="test1",type="0"},
++local payload = {{key="test1",value="test1",type="0"},
  {key="test",value="123122131",type="1"}}
--local head = ~{~{ key="name",value="data",type="0"},
++local head = {{ key="name",value="data",type="0"},
  {key="test2",value="test2",type="0"}}
@@ -1658,15 +1658,14 @@
  print(en)
  End
++{{/code}}
  (((
--== **9.5 convertohex(number type, number value)** ==
++== **convertohex(number type, number value)** ==
  )))
--**Function:**
++**Function:** Convert data into hexadecimal data
--Convert data into hexadecimal data
--
  **parameter:**
  //type~:// incoming data type 0:word 1:dword 2:float
@@ -1679,106 +1679,267 @@
  Failed: multi
++== **crc.init(table prarm)** ==
++
++**Function:** Initialize the CRC
++
++**Parameters:**
++
++prarm is a Lua table and needs to contain the following fields.
++
++* string prarm name, see table 9-1 for details of the parameter model name When this parameter is passed in, the default table parameters are used and the poly,init,xorout,refin,and refout passed in are invalid.
++* number prarm.width: the width, i.e. the number of CRC bits.
++* number [prarm.poly]: short for the generated item in hexadecimal. For example, CRC-32 is 0x04C11DB7, ignoring the highest bit "1", i.e., the complete generation item is 0x104C11DB7.
++* number [prarm.init]: the initialization preset value of the register (crc) at the beginning of the algorithm in hexadecimal.
++* number [prarm.xorout]: the final CRC value obtained after heterodyning the calculation result with this parameter.
++* number [prarm.refin]: whether each byte of the data to be measured is inverted by bit, true or false.
++* number [prarm.refout]: after the calculation or before the heterodyning output, whether the whole data is inverted by bit, true or false.
++
++**Return:**
++
++Success: crc object
++
++Failure: multi, error code
++
  (((
--== **9.6 set_network(table config)** ==
++|=Parameter model name|=poly|=init|=xorout|=refin|=refout
++|crc8|0x07|0x00|0x00|false|false
++|crc8_cdma2000|0x9B|0xFF|0x00|false|false
++|crc8_darc|0x39|0x00|0x00|true|true
++|crc8_dvb_s2|0xD5|0x00|0x00|false|false
++|crc8_ebu|0x1D|0xFF|0x00|true|true
++|crc8_i_code|0x1D|0xFD|0x00|false|false
++|crc8_itu|0x07|0x00|0x55|false|false
++|crc8_maxim|0x31|0x00|0x00|true|true
++|crc8_rohc|0x07|0xFF|0x00|true|true
++|crc8_wcdma|0x9B|0x00|0x00|true|true
++|crc8_sae_j1850|0x1D|0xFF|0xFF|false|false
++|crc8_opensafety|0x2F|0x00|0x00|false|false
++|crc16_tms37157|0x1021|0x3791|0x0000|true|true
++|crc16_a|0x1021|0x6363|0x0000|true|true
++|crc16_riello|0x1021|0x554D|0x0000|true|true
++|crc16_ccitt_false|0x1021|0xFFFF|0x0000|false|false
++|crc16_arc|0x8005|0x0000|0x0000|true|true
++|crc16_arc_ccitt|0x1021|0x1D0F|0x0000|false|false
++|crc16_buypass|0x8005|0x0000|0x0000|false|false
++|crc16_cdma2000|0xC867|0xFFFF|0x0000|false|false
++|crc16_dds110|0x8005|0x800D|0x0000|false|false
++|crc16_dect_r|0x0589|0x0000|0x0001|false|false
++|crc16_dect_x|0x0589|0x0000|0x0000|false|false
++|crc16_dnp|0x3D65|0x0000|0xFFFF|true|true
++|crc16_en_13757|0x3D65|0x0000|0xFFFF|false|false
++|crc16_genibus|0x1021|0xFFFF|0xFFFF|false|false
++|crc16_maxim|0x8005|0x0000|0xFFFF|true|true
++|crc16_mcrf4xx|0x1021|0xFFFF|0x0000|true|true
++|crc16_t10_dif|0x8BB7|0x0000|0x0000|false|false
++|crc16_teledisk|0xA097|0x0000|0x0000|false|false
++|crc16_usb|0x8005|0xFFFF|0xFFFF|true|true
++|crc16_kermit|0x1021|0x0000|0x0000|true|true
++
++(% class="wikigeneratedid" %)
++Table 9-1
++
++== **crc:calc(string crcValue)** ==
++
++**Function:** Calculate CRC result
++
++**Parameter:**
++
++crcValue: the value to be calculated
++
++**Return:**
++
++Succeed: calculated result
++
++Failed: multi, error code
  )))
--**Function:**
++**For example:**
--Set V-BOX network, take effect after restart
++{{code language="LUA"}}
++function crcTest.main()
--**parameter:**
++local param = {
--//config~:// incoming network configuration table
++name = '',
--1. connectMode: the way V-BOX connects to the server, 0: Ethernet, 1: WIFI, 2: 4G, 3: 2G, it is not allowed to be empty.
--1. ethernetEnable: Whether to enable Ethernet, 1: enable, 0: disable, and it is not allowed to be empty.
--1. ethernetLanIp: Set the LAN IP address. Only V-BOX with three network ports support this configuration, and other models of V-BOX do not support setting LAN IP. This item is allowed to be empty.
--1. ethernetIpMode: Whether to enable Ethernet static IP, 1: Enable static IP, 0: DHCP, not allowed to be empty.
--1. ethernetIp: The IP address needs to be configured when the Ethernet static IP is used, and it is not allowed to be empty.
--1. ethernetNetmask: The subnet mask needs to be configured when Ethernet static IP is used, and it is not allowed to be empty.
--1. ethernetGateway: The gateway can be configured when Ethernet static IP is used.
++width = 64,
--1. When using the Ethernet network, if the Gateway is empty, V-BOX will not connect to the server.
--1. If you only use Ethernet to directly connect to the PLC for communication, you do not need to configure a gateway.
++poly = 0x42F0E1EBA9EA3693,
--1. ethernetFirstDns: You can configure the preferred DNS server when the Ethernet static IP is used, and it is allowed to be empty. If you use the Ethernet network and do not fill in the DNS server, V-BOX will not be connected to the server.
--1. ethernetSpareDns: Alternate DNS server can be configured when the Ethernet static IP is used, and it is allowed to be empty.
--1. wifiEnable: Whether to enable WIFI, 1: enable, 0: disable, it is not allowed to be empty. If it is a model that does not include WIFI, directly disable it.
--1. wifiName: WIFI name, if WIFI is enabled, it is not allowed to be empty.
--1. wifiPassword: WIFI password, it is allowed to be empty.
--1. wifiIpMode: Whether to enable WIFI static IP, 1: Enable static IP, 0: DHCP, not allowed to be empty.
--1. wifiIp: IP address needs to be configured when WIFI static IP is used, it is not allowed to be empty.
--1. wifiNetmask: The subnet mask needs to be configured when WIFI static IP is used, and it is not allowed to be empty.
--1. wifiGateway: The gateway can be configured when WIFI static IP is used, and it is not allowed to be empty.
--1. wifiFirstDns: You can configure the preferred DNS server when the WIFI static IP is used, and it is allowed to be empty. If you use the WIFI network and do not fill in the DNS server, V-BOX will not be connected to the server.
--1. wifiSpareDns: Alternate DNS server can be configured when the WIFI static IP is used, and it is allowed to be empty.
--1. mobileEnable: Whether to enable the mobile network, 1: enable, 0: disable, it is not allowed to be empty, if it does not include 4G models, directly disable it.
--1. mobileApnMode: Whether to manually configure the APN, 0: Use the default APN, 1: Manually configure the APN, it is not allowed to be empty.
--1. apnName: APN name, if you choose to manually configure APN, it is not allowed to be empty.
--1. apnPassword: APN username, it is allowed to be empty.
--1. apnUserName: APN number, it is allowed to be empty.
--1. apnNumber: APN number, it is allowed to be empty.
++init = 0xFFFFFFFFFFFFFFFF,
++xorout = 0xFFFFFFFFFFFFFFFF,
++
++refin = 1,
++
++refout = 1
++
++}
++
++crc64,err = crc.init(param)
++
++if not crc64 then
++
++print("Crc init failed:", err)
++else
++
++crcvalue = crc64:calc("123456789")
++
++print(string.format("crc64 calc :0X%16X", crcvalue))
++
++end
++
++end
++{{/code}}
++
++= **9 Special function for V-NET** =
++
++== **normal_get_alldata()** ==
++
++**Function: **Obtain the data of all the monitoring points
++
++**Parameter: None**
++
  **Return:**
--Succeed: true
++Succeed: table two-dimensional arrays, as follows:
--Faied: multi
++* Each item is a monitoring point and contains 4 attributes:
++** 1: ID
++** 2: status
++** 3: tag name
++** 4: value
++* Status contains 3 enumerated values
++** 0: offline
++** 1: online
++** 2: timeout
++* Customization returns an empty table if there is no configuration, otherwise returns "field name/field content"
--(((
--== **9.7 remote_com_start(string config)** ==
--)))
++**For example:**
--**Function:**
++{{code language="LUA"}}
++{
--start serial port pass-through
++[1]= {[1]=1234, [2]=1, [3]='temp', [4]='23.5'},
++[2]= {[1]=1235, [2]=1, [3]='humi', [4]='67'},
++
++...
++
++[n]= {[1]=xxxx, [2]=x, [3]='xxxx', [4]='xx.x'},
++
++}
++
++Failed: table, empty table
++{{/code}}
++
++== **normal_setdata_byname(string name, string data)** ==
++
++**Function:** Write data to the monitoring point name
++
  **Parameter:**
--//config: //incoming serial port parameter configuration, JSON format
++name: the name of monitoring point
--1. type:0, serial port pass-through
--1. port: serial port number marked on the V-BOX
--1. comtype:0-RS232, 1-RS485, 2-RS422
--1. baudrate: Baud Rate
--1. data_length: Data Bits
--1. stop_bit: Stop Bit
--1. check_bit: Check Bit
++data: the data to be written
  **Return:**
--Succeed: true
++Succeed: string: The value of the monitor point before it is written
--Failed: multi
++Failed: nil
--(((
--== **9.8 remote_com_stop()** ==
--)))
++== **normal_getdata_byname(string name)** ==
--**Function:**
++**Function:** Read the data of the monitoring point name
--close serial port pass-through
++**Parameter:**
++name: the name of monitoring point
++
  **Return:**
--Succeed: true
++Succeed: string
--Failed: multi
++Failed: nil
--(((
--== **9.9 remote_com_state()** ==
--)))
++= **10 Message summary algorithm** =
--**Function:**
++== **hmac(string hash_func, string key, string message)** ==
--query the serial port pass-through status and pass-through server domain name and port
++**Function:** HMAC calculate
++**Function name**
++
++hash_func:
++
++* [md5, sha1, sha224, sha256, sha384, sha512]
++* [sha512_224, sha512_256, sha3_224, sha3_256]
++* [sha3_384, sha3_512]
++
++**Parameter:**
++
++key: the key
++
++message: message content
++
  **Return:**
--Succeed:
++Succeed: string, calculation result
--1. number, current pass-through status: 0-none 1,2-starting pass-through 3-penetrating 4,5-finishing pass-through 6-pass-through error
--1. string, pass-through server domain name and port number, xxxx (domain name): xxx (port number)
++Failed: nil
--Failed: multi
++**For example:**
++
++{{code language="LUA"}}
++local sha = require"sha2"
++
++function hmac_test.main()
++
++local hmac = sha.hmac
++
++print(hmac(sha.sha1,
++
++"your key", "your message"))
++
++end
++{{/code}}
++
++== **sha(string message** ==
++
++**Function:** SHA calculate
++
++**Function name:**
++
++sha:
++
++*  sha1, sha224, sha256, sha384, sha512]
++* [sha512_224, sha512_256, sha3_224, sha3_256]
++* [sha3_384, sha3_512]
++
++**Parameter:**
++
++key: the key
++
++message: message content
++
++**Return:**
++
++Succeed: string, calculation result
++
++Failed: nil
++
++For example:
++
++{{code language="LUA"}}
++local sha = require"sha2"
++
++function sha_test.main()
++
++local sha256 = sha.sha256
++
++print(sha256("your message"))
++
++end
++{{/code}}

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