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91	91	== 1.3  Specification ==
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93	93	=== 1.3.1  Rated environmental conditions ===
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113	113	**(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.**
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116	116	[[image:1654852175653-550.png]](% style="display:none" %) ** **
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135	135	== 1.6  Pin mapping and power on ==
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178	178	[[image:image-20220607170145-1.jpeg]]
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181	181	For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
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183	183	Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
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185	185	**Add APP EUI in the application**
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186	186
187	187	[[image:image-20220610161353-4.png]]
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225	225	== 2.3  ​Uplink Payload ==
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227	227	(((
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228	228	LDDS75 will uplink payload via LoRaWAN with below payload format:
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230	230	Uplink payload includes in total 4 bytes.
231	231	Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
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265	265	=== 2.3.2  Distance ===
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267	267	Get the distance. Flat object range 280mm - 7500mm.
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269	269	For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
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272	272	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
273	273	* 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.
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275	275	=== 2.3.3  Interrupt Pin ===
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277	277	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.
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301	301	=== 2.3.5  Sensor Flag ===
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303	303	0x01: Detect Ultrasonic Sensor
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305	305	0x00: No Ultrasonic Sensor
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316	316	The payload decoder function for TTN V3 is here:
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318	318	LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
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844	844	== 2.8  ​Firmware Change Log ==
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847	847	**Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
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850	850	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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991	991	[[image:image-20220610172924-5.png]]
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994	994	In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
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997	997	[[image:image-20220610172924-6.png||height="601" width="860"]]
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1016	1016	Format: Command Code (0x01) followed by 3 bytes time value.
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1018	1018	If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
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1020	1020	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1021	1021	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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1039	1039	Format: Command Code (0x06) followed by 3 bytes.
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1041	1041	This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
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1043	1043	* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1044	1044	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger