LDDS75 - LoRaWAN Distance Detection Sensor User Manual

The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.

22

23

24

It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.

25

26

27

The LoRa wireless technology used in LDDS75 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.

28

29

30

LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.

31

32

33

Each LDDS75 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.

34

35

36

(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors

)))

)))

[[image:1654847051249-359.png]]

== 1.2 Features ==

* LoRaWAN 1.0.3 Class A

48

* Ultra low power consumption

49

* Distance Detection by Ultrasonic technology

50

* Flat object range 280mm - 7500mm

51

* Accuracy: ±(1cm+S*0.3%) (S: Distance)

52

* Cable Length : 25cm

53

* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865

54

* AT Commands to change parameters

55

* Uplink on periodically

56

* Downlink to change configure

57

* IP66 Waterproof Enclosure

58

* 4000mAh or 8500mAh Battery for long term use

59

60

61

== 1.3 Specification ==

62

63

=== 1.3.1 Rated environmental conditions ===

64

65

[[image:image-20220610154839-1.png]]

66

67

**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**

68

69

**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)**

=== 1.3.2 Effective measurement range Reference beam pattern ===

74

75

**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**

[[image:1654852253176-749.png]]

80

81

82

**(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.**

83

84

85

[[image:1654852175653-550.png]](% style="display:none" %) ** **

== 1.5 Applications ==

90

91

* Horizontal distance measurement

92

* Liquid level measurement

93

* Parking management system

94

* Object proximity and presence detection

95

* Intelligent trash can management system

96

* Robot obstacle avoidance

97

* Automatic control

98

* Sewer

99

* Bottom water level monitoring

100

101

102

== 1.6 Pin mapping and power on ==

103

104

105

[[image:1654847583902-256.png]]

= 2. Configure LDDS75 to connect to LoRaWAN network =

110

111

== 2.1 How it works ==

112

113

(((

114

The LDDS75 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value

)))

(((

In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75.

)))

== 2.2 Quick guide to connect to LoRaWAN server (OTAA) ==

124

125

(((

126

Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LG308>>url:http://www.dragino.com/products/lora/item/140-lg308.html]] as a LoRaWAN gateway in this example.

)))

(((

[[image:1654848616367-242.png]]

)))

(((

The LG308 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.

)))

(((

(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.

)))

(((

Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.

143

)))

144

145

[[image:image-20220607170145-1.jpeg]]

146

147

148

For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.

149

150

Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:

151

152

**Add APP EUI in the application**

153

154

[[image:image-20220610161353-4.png]]

155

156

[[image:image-20220610161353-5.png]]

157

158

[[image:image-20220610161353-6.png]]

159

160

161

[[image:image-20220610161353-7.png]]

162

163

164

You can also choose to create the device manually.

165

166

[[image:image-20220610161538-8.png]]

**Add APP KEY and DEV EUI**

171

172

[[image:image-20220610161538-9.png]]

(% style="color:blue" %)**Step 2**(%%): Power on LDDS75

177

178

179

Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).

180

181

[[image:image-20220610161724-10.png]]

(((

(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.

186

)))

187

188

[[image:1654849068701-275.png]]

== 2.3 Uplink Payload ==

193

194

(((

195

LDDS75 will uplink payload via LoRaWAN with below payload format:

196

197

Uplink payload includes in total 4 bytes.

198

Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance

)))

(((

)))

(% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)

206

|=(% style="width: 62.5px;" %)(((

207

**Size (bytes)**

208

)))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**

209

|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((

210

[[Distance>>||anchor="H2.3.3A0Distance"]]

211

212

(unit: mm)

213

)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((

214

[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]

215

)))|[[Sensor Flag>>path:#Sensor_Flag]]

216

217

[[image:1654850511545-399.png]]

=== 2.3.1 Battery Info ===

222

223

224

Check the battery voltage for LDDS75.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.3.2 Distance ===

233

234

Get the distance. Flat object range 280mm - 7500mm.

235

236

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.**

237

238

239

* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.

240

* 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.

241

242

243

=== 2.3.3 Interrupt Pin ===

244

245

This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.

**Example:**

0x00: Normal uplink packet.

250

251

0x01: Interrupt Uplink Packet.

=== 2.3.4 DS18B20 Temperature sensor ===

256

257

This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.

**Example**:

If payload is: 0105H: (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree

262

263

If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.

264

265

(% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.

=== 2.3.5 Sensor Flag ===

270

271

0x01: Detect Ultrasonic Sensor

272

273

0x00: No Ultrasonic Sensor

===

(% style="color:inherit; font-family:inherit" %)2.3.6 Decode payload in The Things Network(%%) ===

278

279

While using TTN network, you can add the payload format to decode the payload.

280

281

282

[[image:1654850829385-439.png]]

283

284

The payload decoder function for TTN V3 is here:

285

286

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/]]

== 2.4 Uplink Interval ==

291

292

The LDDS75 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"]]

== 2.5 Show Data in DataCake IoT Server ==

297

298

(((

299

[[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:

)))

(((

)))

(((

(% style="color:blue" %)**Step 1**(%%)**: Be sure that your device is programmed and properly connected to the network at this time.**

)))

(((

(% style="color:blue" %)**Step 2**(%%)**: To configure the Application to forward data to DATACAKE you will need to add integration. To add the DATACAKE integration, perform the following steps:**

)))

[[image:1654592790040-760.png]]

316

317

318

[[image:1654592800389-571.png]]

319

320

321

(% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**

322

323

(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**

324

325

[[image:1654851029373-510.png]]

326

327

328

After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake.

329

330

[[image:image-20220610165129-11.png||height="595" width="1088"]]

== 2.6 Frequency Plans ==

335

336

(((

337

The LDDS75 uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.

)))

=== 2.6.1 EU863-870 (EU868) ===

343

344

(((

345

(% style="color:blue" %)**Uplink:**

)))

(((

868.1 - SF7BW125 to SF12BW125

)))

(((

868.3 - SF7BW125 to SF12BW125 and SF7BW250

)))

(((

868.5 - SF7BW125 to SF12BW125

)))

(((

867.1 - SF7BW125 to SF12BW125

)))

(((

867.3 - SF7BW125 to SF12BW125

)))

(((

867.5 - SF7BW125 to SF12BW125

)))

(((

867.7 - SF7BW125 to SF12BW125

)))

(((

867.9 - SF7BW125 to SF12BW125

)))

(((

868.8 - FSK

)))

(((

)))

(((

(% style="color:blue" %)**Downlink:**

)))

(((

Uplink channels 1-9 (RX1)

)))

(((

869.525 - SF9BW125 (RX2 downlink only)

)))

=== 2.6.2 US902-928(US915) ===

403

404

(((

405

Used in USA, Canada and South America. Default use CHE=2

406

407

(% style="color:blue" %)**Uplink:**

408

409

903.9 - SF7BW125 to SF10BW125

410

411

904.1 - SF7BW125 to SF10BW125

412

413

904.3 - SF7BW125 to SF10BW125

414

415

904.5 - SF7BW125 to SF10BW125

416

417

904.7 - SF7BW125 to SF10BW125

418

419

904.9 - SF7BW125 to SF10BW125

420

421

905.1 - SF7BW125 to SF10BW125

422

423

905.3 - SF7BW125 to SF10BW125

424

425

426

(% style="color:blue" %)**Downlink:**

427

428

923.3 - SF7BW500 to SF12BW500

429

430

923.9 - SF7BW500 to SF12BW500

431

432

924.5 - SF7BW500 to SF12BW500

433

434

925.1 - SF7BW500 to SF12BW500

435

436

925.7 - SF7BW500 to SF12BW500

437

438

926.3 - SF7BW500 to SF12BW500

439

440

926.9 - SF7BW500 to SF12BW500

441

442

927.5 - SF7BW500 to SF12BW500

443

444

923.3 - SF12BW500(RX2 downlink only)

)))

=== 2.6.3 CN470-510 (CN470) ===

451

452

(((

453

Used in China, Default use CHE=1

)))

(((

(% style="color:blue" %)**Uplink:**

)))

(((

486.3 - SF7BW125 to SF12BW125

)))

(((

486.5 - SF7BW125 to SF12BW125

)))

(((

486.7 - SF7BW125 to SF12BW125

)))

(((

486.9 - SF7BW125 to SF12BW125

)))

(((

487.1 - SF7BW125 to SF12BW125

)))

(((

487.3 - SF7BW125 to SF12BW125

)))

(((

487.5 - SF7BW125 to SF12BW125

)))

(((

487.7 - SF7BW125 to SF12BW125

)))

(((

)))

(((

(% style="color:blue" %)**Downlink:**

)))

(((

506.7 - SF7BW125 to SF12BW125

)))

(((

506.9 - SF7BW125 to SF12BW125

)))

(((

507.1 - SF7BW125 to SF12BW125

)))

(((

507.3 - SF7BW125 to SF12BW125

)))

(((

507.5 - SF7BW125 to SF12BW125

)))

(((

507.7 - SF7BW125 to SF12BW125

)))

(((

507.9 - SF7BW125 to SF12BW125

)))

(((

508.1 - SF7BW125 to SF12BW125

)))

(((

505.3 - SF12BW125 (RX2 downlink only)

)))

=== 2.6.4 AU915-928(AU915) ===

(((

Default use CHE=2

(% style="color:blue" %)**Uplink:**

544

545

916.8 - SF7BW125 to SF12BW125

546

547

917.0 - SF7BW125 to SF12BW125

548

549

917.2 - SF7BW125 to SF12BW125

550

551

917.4 - SF7BW125 to SF12BW125

552

553

917.6 - SF7BW125 to SF12BW125

554

555

917.8 - SF7BW125 to SF12BW125

556

557

918.0 - SF7BW125 to SF12BW125

558

559

918.2 - SF7BW125 to SF12BW125

560

561

562

(% style="color:blue" %)**Downlink:**

563

564

923.3 - SF7BW500 to SF12BW500

565

566

923.9 - SF7BW500 to SF12BW500

567

568

924.5 - SF7BW500 to SF12BW500

569

570

925.1 - SF7BW500 to SF12BW500

571

572

925.7 - SF7BW500 to SF12BW500

573

574

926.3 - SF7BW500 to SF12BW500

575

576

926.9 - SF7BW500 to SF12BW500

577

578

927.5 - SF7BW500 to SF12BW500

579

580

923.3 - SF12BW500(RX2 downlink only)

)))

=== 2.6.5 AS920-923 & AS923-925 (AS923) ===

587

588

(((

589

(% style="color:blue" %)**Default Uplink channel:**

)))

(((

923.2 - SF7BW125 to SF10BW125

)))

(((

923.4 - SF7BW125 to SF10BW125

)))

(((

)))

(((

(% style="color:blue" %)**Additional Uplink Channel**:

)))

(((

(OTAA mode, channel added by JoinAccept message)

)))

(((

)))

(((

(% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:

)))

(((

922.2 - SF7BW125 to SF10BW125

)))

(((

922.4 - SF7BW125 to SF10BW125

)))

(((

922.6 - SF7BW125 to SF10BW125

)))

(((

922.8 - SF7BW125 to SF10BW125

)))

(((

923.0 - SF7BW125 to SF10BW125

)))

(((

922.0 - SF7BW125 to SF10BW125

)))

(((

)))

(((

(% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:

)))

(((

923.6 - SF7BW125 to SF10BW125

)))

(((

923.8 - SF7BW125 to SF10BW125

)))

(((

924.0 - SF7BW125 to SF10BW125

)))

(((

924.2 - SF7BW125 to SF10BW125

)))

(((

924.4 - SF7BW125 to SF10BW125

)))

(((

924.6 - SF7BW125 to SF10BW125

)))

(((

)))

(((

(% style="color:blue" %)**Downlink:**

)))

(((

Uplink channels 1-8 (RX1)

)))

(((

923.2 - SF10BW125 (RX2)

)))

=== 2.6.6 KR920-923 (KR920) ===

695

696

(((

697

(% style="color:blue" %)**Default channel:**

)))

(((

922.1 - SF7BW125 to SF12BW125

)))

(((

922.3 - SF7BW125 to SF12BW125

)))

(((

922.5 - SF7BW125 to SF12BW125

)))

(((

)))

(((

(% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**

)))

(((

922.1 - SF7BW125 to SF12BW125

)))

(((

922.3 - SF7BW125 to SF12BW125

)))

(((

922.5 - SF7BW125 to SF12BW125

)))

(((

922.7 - SF7BW125 to SF12BW125

)))

(((

922.9 - SF7BW125 to SF12BW125

)))

(((

923.1 - SF7BW125 to SF12BW125

)))

(((

923.3 - SF7BW125 to SF12BW125

)))

(((

)))

(((

(% style="color:blue" %)**Downlink:**

)))

(((

Uplink channels 1-7(RX1)

)))

(((

921.9 - SF12BW125 (RX2 downlink only; SF12BW125 might be changed to SF9BW125)

)))

=== 2.6.7 IN865-867 (IN865) ===

767

768

(((

769

(% style="color:blue" %)**Uplink:**

)))

(((

865.0625 - SF7BW125 to SF12BW125

)))

(((

865.4025 - SF7BW125 to SF12BW125

)))

(((

865.9850 - SF7BW125 to SF12BW125

)))

(((

)))

(((

(% style="color:blue" %)**Downlink:**

)))

(((

Uplink channels 1-3 (RX1)

)))

(((

866.550 - SF10BW125 (RX2)

)))

== 2.7 LED Indicator ==

803

804

The LDDS75 has an internal LED which is to show the status of different state.

805

806

807

* Blink once when device power on.

808

* The device detects the sensor and flashes 5 times.

809

* Solid ON for 5 seconds once device successful Join the network.

810

* Blink once when device transmit a packet.

811

812

813

== 2.8 Firmware Change Log ==

814

815

816

**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/]]

817

818

819

**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]

== 2.9 Mechanical ==

[[image:image-20220610172003-1.png]]

827

828

[[image:image-20220610172003-2.png]]

829

830

831

== 2.10 Battery Analysis ==

832

833

=== 2.10.1 Battery Type ===

834

835

The LDDS75 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.

836

837

838

The battery related documents as below:

839

840

* (((

841

[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],

842

)))

843

* (((

844

[[Lithium-Thionyl Chloride Battery datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],

845

)))

846

* (((

847

[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]

848

)))

849

850

[[image:image-20220610172400-3.png]]

=== 2.10.2 Replace the battery ===

855

856

(((

857

You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.

)))

(((

)))

(((

The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)

)))

= 3. Configure LLDS12 via AT Command or LoRaWAN Downlink =

(((

(((

Use can configure LDDS75 via AT Command or LoRaWAN Downlink.

)))

)))

* (((

(((

AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].

)))

)))

* (((

(((

LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]

)))

)))

(((

(((

)))

(((

There are two kinds of commands to configure LDDS75, they are:

)))

)))

* (((

(((

(% style="color:#4f81bd" %)** General Commands**.

)))

)))

(((

(((

These commands are to configure:

)))

)))

* (((

(((

General system settings like: uplink interval.

)))

)))

* (((

(((

LoRaWAN protocol & radio related command.

)))

)))

(((

(((

They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]

)))

)))

(((

(((

)))

)))

* (((

(((

(% style="color:#4f81bd" %)** Commands special design for LDDS75**

)))

)))

(((

(((

These commands only valid for LDDS75, as below:

)))

)))

== 3.1 Access AT Commands ==

949

950

LDDS75 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LDDS75 for using AT command, as below.

951

952

[[image:image-20220610172924-4.png||height="483" width="988"]]

953

954

955

Or if you have below board, use below connection:

956

957

958

[[image:image-20220610172924-5.png]]

959

960

961

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:

962

963

964

[[image:image-20220610172924-6.png||height="601" width="860"]]

== 3.2 Set Transmit Interval Time ==

969

970

Feature: Change LoRaWAN End Node Transmit Interval.

971

972

(% style="color:#037691" %)**AT Command: AT+TDC**

973

974

[[image:image-20220610173409-7.png]]

(((

(% style="color:#037691" %)**Downlink Command: 0x01**

)))

(((

(((

Format: Command Code (0x01) followed by 3 bytes time value.

986

987

If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.

988

989

* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds

990

* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds

)))

)))

== 3.3 Get Firmware Version Info ==

998

999

Feature: use downlink to get firmware version.

1000

1001

(% style="color:#037691" %)**Downlink Command: 0x26**

1002

1003

[[image:image-20220607171917-10.png]]

1004

1005

* Reply to the confirmation package: 26 01

1006

* Reply to non-confirmed packet: 26 00

1007

1008

Device will send an uplink after got this downlink command. With below payload:

1009

1010

Configures info payload:

1011

1012

(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)

1013

|=(((

1014

**Size(bytes)**

1015

)))|=**1**|=**1**|=**1**|=**1**|=**1**|=**5**|=**1**

1016

|**Value**|Software Type|(((

Frequency

Band

)))|Sub-band|(((

Firmware

Version

)))|Sensor Type|Reserve|(((

1025

[[Message Type>>||anchor="H2.3.7A0MessageType"]]

Always 0x02

)))

**Software Type**: Always 0x03 for LLDS12

**Frequency Band**:

*0x01: EU868

*0x02: US915

*0x03: IN865

*0x04: AU915

*0x05: KZ865

*0x06: RU864

*0x07: AS923

*0x08: AS923-1

*0x09: AS923-2

*0xa0: AS923-3

**Sub-Band**: value 0x00 ~~ 0x08

1056

1057

1058

**Firmware Version**: 0x0100, Means: v1.0.0 version

**Sensor Type**:

0x01: LSE01

0x02: LDDS75

0x03: LDDS20

0x04: LLMS01

0x05: LSPH01

0x06: LSNPK01

0x07: LLDS12

= 5. Battery & How to replace =

1080

1081

== 5.1 Battery Type ==

1082

1083

(((

1084

LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.

)))

(((

The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.

1089

)))

1090

1091

[[image:1654593587246-335.png]]

1092

1093

1094

Minimum Working Voltage for the LLDS12:

1095

1096

LLDS12: 2.45v ~~ 3.6v

== 5.2 Replace Battery ==

1101

1102

(((

1103

Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.

)))

(((

And make sure the positive and negative pins match.

)))

== 5.3 Power Consumption Analyze ==

1113

1114

(((

1115

Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.

)))

(((

Instruction to use as below:

)))

**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:

1124

1125

[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]

1126

1127

1128

**Step 2**: Open it and choose

* Product Model

* Uplink Interval

* Working Mode

And the Life expectation in difference case will be shown on the right.

1135

1136

[[image:1654593605679-189.png]]

1137

1138

1139

The battery related documents as below:

1140

1141

* (((

1142

[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],

1143

)))

1144

* (((

1145

[[Lithium-Thionyl Chloride Battery datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],

1146

)))

1147

* (((

1148

[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]

1149

)))

1150

1151

[[image:image-20220607172042-11.png]]

=== 5.3.1 Battery Note ===

1156

1157

(((

1158

The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.

)))

=== 5.3.2 Replace the battery ===

1164

1165

(((

1166

You can change the battery in the LLDS12.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.

)))

(((

The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)

)))

= 6. Use AT Command =

1176

1177

== 6.1 Access AT Commands ==

1178

1179

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.

1180

1181

[[image:1654593668970-604.png]]

**Connection:**

(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**

1186

1187

(% style="background-color:yellow" %)** USB TTL TXD <~-~-~-~-> UART_RXD**

1188

1189

(% style="background-color:yellow" %)** USB TTL RXD <~-~-~-~-> UART_TXD**

(((

(((

In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.

)))

(((

LLDS12 will output system info once power on as below:

)))

)))

[[image:1654593712276-618.png]]

1204

1205

Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].

= 7. FAQ =

== 7.1 How to change the LoRa Frequency Bands/Region ==

1211

1212

You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].

1213

When downloading the images, choose the required image file for download.

1214

1215

1216

= 8. Trouble Shooting =

1217

1218

== 8.1 AT Commands input doesn’t work ==

(((

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.

)))

== 8.2 Significant error between the output distant value of LiDAR and actual distance ==

(((

(% 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.)

)))

(((

Troubleshooting: Please avoid use of this product under such circumstance in practice.

)))

(((

)))

(((

(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.

)))

(((

Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.

)))

= 9. Order Info =

Part Number: (% style="color:blue" %)**LLDS12-XX**

1255

1256

1257

(% style="color:blue" %)**XX**(%%): The default frequency band

1258

1259

* (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band

1260

* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band

1261

* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band

1262

* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band

1263

* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band

1264

* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band

1265

* (% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band

1266

* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band

= 10. Packing Info =

**Package Includes**:

1272

1273

* LLDS12 LoRaWAN LiDAR Distance Sensor x 1

1274

1275

**Dimension and weight**:

* Device Size: cm

* Device Weight: g

* Package Size / pcs : cm

* Weight / pcs : g

= 11. Support =

* 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.

1285

* 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.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].

Wiki source code of LDDS75 - LoRaWAN Distance Detection Sensor User Manual

Applications

Navigation