Changes for page LDDS45 - LoRaWAN Distance Detection Sensor User Manual
Last modified by Mengting Qiu on 2025/02/26 15:04
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... ... @@ -994,7 +994,7 @@ 994 994 995 995 (% style="color:#037691" %)**Downlink Command: AT+INTMOD** 996 996 997 -[[image:image-202206101 05907-1.png]]997 +[[image:image-20220610174917-9.png]] 998 998 999 999 1000 1000 (% style="color:#037691" %)**Downlink Command: 0x06** ... ... @@ -1007,84 +1007,43 @@ 1007 1007 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger 1008 1008 1009 1009 1010 += 4. FAQ = 1010 1010 1012 +== 4.1 What is the frequency plan for LDDS75? == 1011 1011 1012 - =6.ATCommand =1014 +LDDS75 use the same frequency as other Dragino products. User can see the detail from this link: [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]] 1013 1013 1014 -== 6.1 Access AT Commands == 1015 1015 1016 -LLDS12 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LLDS12 for using AT command, as below. 1017 1017 1018 - [[image:1654593668970-604.png]]1018 +== 4.2 How to change the LoRa Frequency Bands/Region == 1019 1019 1020 -**Connection:** 1020 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]]. 1021 +When downloading the images, choose the required image file for download. 1021 1021 1022 -(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND** 1023 1023 1024 -(% style="background-color:yellow" %)** USB TTL TXD <~-~-~-~-> UART_RXD** 1025 1025 1026 - (%style="background-color:yellow"%)** USB TTL RXD <~-~-~-~-> UART_TXD**1025 +== 4.3 Can I use LDDS75 in condensation environment? == 1027 1027 1027 +LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0. 1028 1028 1029 -((( 1030 -((( 1031 -In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12. 1032 -))) 1033 1033 1034 -((( 1035 -LLDS12 will output system info once power on as below: 1036 -))) 1037 -))) 1038 1038 1031 += 5. Trouble Shooting = 1039 1039 1040 - [[image:1654593712276-618.png]]1033 +== 5.1 Why I can’t join TTN V3 in US915 / AU915 bands? == 1041 1041 1042 - ValidAT Commandpleasecheck[[ConfigureDevice>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].1035 +It is due to channel mapping. Please see below link: [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]] 1043 1043 1044 1044 1045 -= 4.FAQ=1038 +== 5.2 AT Command input doesn't work == 1046 1046 1047 -== 4.1 How to change the LoRa Frequency Bands/Region == 1048 - 1049 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]]. 1050 -When downloading the images, choose the required image file for download. 1051 - 1052 - 1053 -= 5. Trouble Shooting = 1054 - 1055 -== 5.1 AT Commands input doesn’t work == 1056 - 1057 - 1058 -((( 1059 1059 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. 1060 -))) 1061 1061 1062 - 1063 -== 5.2 Significant error between the output distant value of LiDAR and actual distance == 1064 - 1065 - 1066 1066 ((( 1067 -(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.) 1068 -))) 1069 - 1070 -((( 1071 -Troubleshooting: Please avoid use of this product under such circumstance in practice. 1072 -))) 1073 - 1074 -((( 1075 1075 1076 1076 ))) 1077 1077 1078 -((( 1079 -(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked. 1080 -))) 1081 1081 1082 -((( 1083 -Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter. 1084 -))) 1085 - 1086 - 1087 - 1088 1088 = 6. Order Info = 1089 1089 1090 1090
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