Changes for page DS20L -- LoRaWAN Smart Distance Detector User Manual 01
Last modified by Mengting Qiu on 2023/12/14 11:15
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... ... @@ -1,1 +1,1 @@ 1 -DDS 45-LB -- LoRaWAN Distance Detection Sensor User Manual1 +DDS75-LB -- LoRaWAN Distance Detection Sensor User Manual - Content
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... ... @@ -22,13 +22,13 @@ 22 22 23 23 It detects the distance(% style="color:blue" %)** between the measured object and the sensor**(%%), and uploads the value via wireless to LoRaWAN IoT Server. 24 24 25 -The LoRa wireless technology used in DDS75-LB allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.25 +The LoRa wireless technology used in SW3L-LB allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. 26 26 27 - DDS75-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.27 +SW3L-LB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use. 28 28 29 - DDS75-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.29 +SW3L-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years. 30 30 31 -Each DDS75-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.31 +Each SW3L-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on. 32 32 33 33 [[image:image-20230612170943-2.png||height="525" width="912"]] 34 34 ... ... @@ -50,10 +50,36 @@ 50 50 * IP66 Waterproof Enclosure 51 51 * 8500mAh Battery for long term use 52 52 53 - 54 54 == 1.3 Specification == 55 55 56 56 56 +(% style="color:#037691" %)**Rated environmental conditions:** 57 + 58 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %) 59 +|(% style="background-color:#d9e2f3; color:#0070c0; width:163px" %)**Item**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)((( 60 +**Minimum value** 61 +)))|(% style="background-color:#d9e2f3; color:#0070c0; width:70px" %)((( 62 +**Typical value** 63 +)))|(% style="background-color:#d9e2f3; color:#0070c0; width:87px" %)((( 64 +**Maximum value** 65 +)))|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**Unit**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Remarks** 66 +|(% style="width:174px" %)Storage temperature|(% style="width:86px" %)-25|(% style="width:66px" %)25|(% style="width:90px" %)80|(% style="width:48px" %)℃|(% style="width:203px" %) 67 +|(% style="width:174px" %)Storage humidity|(% style="width:86px" %) |(% style="width:66px" %)65%|(% style="width:90px" %)90%|(% style="width:48px" %)RH|(% style="width:203px" %)(1) 68 +|(% style="width:174px" %)Operating temperature|(% style="width:86px" %)-15|(% style="width:66px" %)25|(% style="width:90px" %)60|(% style="width:48px" %)℃|(% style="width:203px" %) 69 +|(% style="width:174px" %)Working humidity|(% style="width:86px" %)((( 70 + 71 + 72 + 73 +)))|(% style="width:66px" %)65%|(% style="width:90px" %)80%|(% style="width:48px" %)RH|(% style="width:203px" %)(1) 74 + 75 +((( 76 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing); ** 77 + 78 +**~ b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)** 79 + 80 + 81 +))) 82 + 57 57 (% style="color:#037691" %)**Common DC Characteristics:** 58 58 59 59 * Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~~ 3.6v ... ... @@ -79,49 +79,20 @@ 79 79 * Sleep Mode: 5uA @ 3.3v 80 80 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm 81 81 108 +== 1.4 Effective measurement range Reference beam pattern == 82 82 83 -== 1.4 Rated environmental conditions == 84 84 111 +**~1. The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.** 85 85 86 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %) 87 -|(% style="background-color:#d9e2f3; color:#0070c0; width:163px" %)**Item**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)((( 88 -**Minimum value** 89 -)))|(% style="background-color:#d9e2f3; color:#0070c0; width:70px" %)((( 90 -**Typical value** 91 -)))|(% style="background-color:#d9e2f3; color:#0070c0; width:87px" %)((( 92 -**Maximum value** 93 -)))|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**Unit**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Remarks** 94 -|(% style="width:174px" %)Storage temperature|(% style="width:86px" %)-25|(% style="width:66px" %)25|(% style="width:90px" %)80|(% style="width:48px" %)℃|(% style="width:203px" %) 95 -|(% style="width:174px" %)Storage humidity|(% style="width:86px" %) |(% style="width:66px" %)65%|(% style="width:90px" %)90%|(% style="width:48px" %)RH|(% style="width:203px" %)(1) 96 -|(% style="width:174px" %)Operating temperature|(% style="width:86px" %)-15|(% style="width:66px" %)25|(% style="width:90px" %)60|(% style="width:48px" %)℃|(% style="width:203px" %) 97 -|(% style="width:174px" %)Working humidity|(% style="width:86px" %)((( 98 - 99 - 100 - 101 -)))|(% style="width:66px" %)65%|(% style="width:90px" %)80%|(% style="width:48px" %)RH|(% style="width:203px" %)(1) 102 - 103 -((( 104 -(% style="color:red" %)**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing); ** 105 - 106 -(% style="color:red" %)** b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)** 107 - 108 - 109 -))) 110 - 111 -== 1.5 Effective measurement range Reference beam pattern == 112 - 113 - 114 -(% style="color:blue" %)**1. The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.** 115 - 116 116 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852253176-749.png?rev=1.1||alt="1654852253176-749.png"]] 117 117 118 118 119 - (% style="color:blue" %)**2. The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**116 +**2. The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.** 120 120 121 121 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852175653-550.png?rev=1.1||alt="1654852175653-550.png"]] 122 122 123 123 124 -== 1. 6Applications ==121 +== 1.5 Applications == 125 125 126 126 127 127 * Horizontal distance measurement ... ... @@ -134,16 +134,15 @@ 134 134 * Sewer 135 135 * Bottom water level monitoring 136 136 134 +== 1.6 Sleep mode and working mode == 137 137 138 -== 1.7 Sleep mode and working mode == 139 139 140 - 141 141 (% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life. 142 142 143 143 (% style="color:blue" %)**Working Mode:** (%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode. 144 144 145 145 146 -== 1. 8Button & LEDs ==142 +== 1.7 Button & LEDs == 147 147 148 148 149 149 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]] ... ... @@ -162,10 +162,9 @@ 162 162 ))) 163 163 |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode. 164 164 161 +== 1.8 BLE connection == 165 165 166 -== 1.9 BLE connection == 167 167 168 - 169 169 DDS75-LB support BLE remote configure. 170 170 171 171 ... ... @@ -178,14 +178,16 @@ 178 178 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode. 179 179 180 180 181 -== 1. 10Pin Definitions ==176 +== 1.9 Pin Definitions == 182 182 183 183 [[image:image-20230523174230-1.png]] 184 184 185 185 186 -== 1.11Mechanical==181 +== == 187 187 183 +== 2.10 Mechanical == 188 188 185 + 189 189 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143884058-338.png]] 190 190 191 191 ... ... @@ -195,7 +195,7 @@ 195 195 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675143909447-639.png]] 196 196 197 197 198 - (% style="color:blue" %)**Probe Mechanical:**195 +**Probe Mechanical:** 199 199 200 200 201 201 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20220610172003-1.png?rev=1.1||alt="image-20220610172003-1.png"]] ... ... @@ -271,13 +271,20 @@ 271 271 272 272 273 273 ((( 271 +((( 274 274 DDS75-LB will uplink payload via LoRaWAN with below payload format: 275 275 ))) 276 276 277 277 ((( 278 -Uplink payload includes in total 8 bytes. 276 +Uplink payload includes in total 4 bytes. 277 +Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance 279 279 ))) 279 +))) 280 280 281 +((( 282 + 283 +))) 284 + 281 281 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %) 282 282 |=(% style="width: 62.5px;background-color:#D9E2F3;color:#0070C0" %)((( 283 283 **Size(bytes)** ... ... @@ -317,13 +317,12 @@ 317 317 318 318 319 319 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor. 320 -* If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. All value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.324 +* If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid. 321 321 322 - 323 323 === 2.3.3 Interrupt Pin === 324 324 325 325 326 -This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3 .2SetInterruptMode"]] for the hardware and software set up.329 +This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up. 327 327 328 328 **Example:** 329 329 ... ... @@ -343,7 +343,9 @@ 343 343 344 344 If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees. 345 345 349 +(% style="color:red" %)**Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.** 346 346 351 + 347 347 === 2.3.5 Sensor Flag === 348 348 349 349 ... ... @@ -373,7 +373,7 @@ 373 373 == 2.4 Uplink Interval == 374 374 375 375 376 -The DDS75-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>||anchor="H 3.3.1SetTransmitIntervalTime"]]381 +The DDS75-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]] 377 377 378 378 379 379 == 2.5 Show Data in DataCake IoT Server == ... ... @@ -383,6 +383,9 @@ 383 383 [[DATACAKE>>url:https://datacake.co/]] provides a human friendly interface to show the sensor data, once we have data in TTN, we can use [[DATACAKE>>url:https://datacake.co/]] to connect to TTN and see the data in DATACAKE. Below are the steps: 384 384 ))) 385 385 391 +((( 392 + 393 +))) 386 386 387 387 ((( 388 388 (% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.** ... ... @@ -457,7 +457,7 @@ 457 457 458 458 User need to set (% style="color:blue" %)**SYNCMOD=1**(%%) to enable sync time via MAC command. 459 459 460 -Once DDS75-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to DDS75-LB. If DDS75-LB fails to get the time from the server, DDS75-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).468 +Once DDS75-LB Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to SW3L-LB. If DDS75-LB fails to get the time from the server, DDS75-LB will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days). 461 461 462 462 (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.** 463 463 ... ... @@ -497,7 +497,7 @@ 497 497 [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]] 498 498 499 499 500 -= 3. Configure DDS75-LB =508 += 3. Configure SW3L-LB = 501 501 502 502 == 3.1 Configure Methods == 503 503 ... ... @@ -510,7 +510,6 @@ 510 510 511 511 * LoRaWAN Downlink. Instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section. 512 512 513 - 514 514 == 3.2 General Commands == 515 515 516 516 ... ... @@ -571,11 +571,9 @@ 571 571 ))) 572 572 * ((( 573 573 Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds 574 - 575 - 576 - 577 577 ))) 578 578 583 + 579 579 === 3.3.2 Set Interrupt Mode === 580 580 581 581 ... ... @@ -631,81 +631,29 @@ 631 631 632 632 * Fix bugs. 633 633 634 -Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/ 7la95mae0fn03xe/AACtzs-32m22TLb75B-iIr-Qa?dl=0]]**639 +Firmware and changelog can be downloaded from : **[[Firmware download link>>url:https://www.dropbox.com/sh/kwqv57tp6pejias/AAAopYMATh1GM6fZ-VRCLrpDa?dl=0]]** 635 635 636 636 Methods to Update Firmware: 637 637 638 -* (Recommanded way) OTA firmware update via wireless: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]] 643 +* (Recommanded way) OTA firmware update via wireless: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]] 639 639 640 -* Update through UART TTL interface :**[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**.645 +* Update through UART TTL interface. **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**. 641 641 642 - 643 643 = 6. FAQ = 644 644 645 -== 6.1 Whatis thefrequencyplan forDDS75-LB?==649 +== 6.1 AT Commands input doesn't work == 646 646 647 647 648 - DDS75-LBusethesame frequencyasotherDraginoproducts.Usercanseethe detail fromthis link:[[Introduction>>doc:Main.EndDeviceFrequencyBand.WebHome||anchor="H1.Introduction"]]652 +In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string. 649 649 650 650 651 -= =6.2Can I use DDS75-LB in condensationenvironment?==655 += 7. Order Info = 652 652 653 653 654 - DDS75-LB is notsuitable to beused incondensation environment.Condensation on the DDS75-LBprobe will affect the reading and always got 0.658 +Part Number: (% style="color:blue" %)**SW3L-LB-XXX-YYY** 655 655 660 +(% style="color:red" %)**XXX**(%%): The default frequency band 656 656 657 -= 7. Trouble Shooting = 658 - 659 -== 7.1 Why I can't join TTN V3 in US915 / AU915 bands? == 660 - 661 - 662 -It is due to channel mapping. Please see below link: [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]] 663 - 664 - 665 -== 7.2 AT Command input doesn't work == 666 - 667 - 668 -In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:blue" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:blue" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string. 669 - 670 - 671 -== 7.3 Why does the sensor reading show 0 or "No sensor" == 672 - 673 - 674 -~1. The measurement object is very close to the sensor, but in the blind spot of the sensor. 675 - 676 -2. Sensor wiring is disconnected 677 - 678 -3. Not using the correct decoder 679 - 680 - 681 -== 7.4 Abnormal readings The gap between multiple readings is too large or the gap between the readings and the actual value is too large == 682 - 683 - 684 -1) Please check if there is something on the probe affecting its measurement (condensed water, volatile oil, etc.) 685 - 686 -2) Does it change with temperature, temperature will affect its measurement 687 - 688 -3) If abnormal data occurs, you can turn on DEBUG mode, Please use downlink or AT COMMAN to enter DEBUG mode. 689 - 690 -downlink command: (% style="color:blue" %)**F1 01**(%%), AT command: (% style="color:blue" %)**AT+DDEBUG=1** 691 - 692 -4) After entering the debug mode, it will send 20 pieces of data at a time, and you can send its uplink to us for analysis 693 - 694 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20230113135125-2.png?width=1057&height=136&rev=1.1||alt="image-20230113135125-2.png"]] 695 - 696 - 697 -Its original payload will be longer than other data. Even though it is being parsed, it can be seen that it is abnormal data. 698 - 699 -Please send the data to us for check. 700 - 701 - 702 -= 8. Order Info = 703 - 704 - 705 -Part Number: (% style="color:blue" %)**DDS75-LB-XXX** 706 - 707 -(% style="color:red" %)**XXX**(%%): **The default frequency band** 708 - 709 709 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band 710 710 711 711 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band ... ... @@ -722,13 +722,43 @@ 722 722 723 723 * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band 724 724 678 +((( 679 +(% style="color:blue" %)**YYY**(%%): Flow Sensor Model: 680 +))) 725 725 726 -= 9. Packing Info = 682 +((( 683 + **004:** DW-004 Flow Sensor: diameter: G1/2” / DN15. 450 pulse = 1 L 684 +))) 727 727 686 +((( 687 + **006:** DW-006 Flow Sensor: diameter: G3/4” / DN20. 390 pulse = 1 L 688 +))) 728 728 690 +((( 691 + **010:** DW-010 Flow Sensor: diameter: G 1” / DN25. 64 pulse = 1 L 692 +))) 693 + 694 +* ((( 695 +calculate flag=0: for SW3L-004 Flow Sensor: 450 pulse = 1 L 696 +))) 697 + 698 +* ((( 699 +calculate flag=1: for SW3L-006 Flow Sensor: 390 pulse = 1 L 700 +))) 701 + 702 +* ((( 703 +calculate flag=2: for SW3L-010 Flow Sensor: 64 pulse = 1 L 704 + 705 + 706 + 707 +))) 708 + 709 += 8. Packing Info = 710 + 711 + 729 729 (% style="color:#037691" %)**Package Includes**: 730 730 731 -* DDS75-LB LoRaWANDistance DetectionSensorx 1714 +* SW3L-LB LoRaWAN Flow Sensor 732 732 733 733 (% style="color:#037691" %)**Dimension and weight**: 734 734 ... ... @@ -740,10 +740,9 @@ 740 740 741 741 * Weight / pcs : g 742 742 726 += 9. Support = 743 743 744 -= 10. Support = 745 745 746 - 747 747 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule. 748 748 749 749 * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[Support@dragino.cc>>mailto:Support@dragino.cc]].