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... ... @@ -9,6 +9,12 @@ 9 9 ))) 10 10 11 11 12 + 13 + 14 + 15 + 16 + 17 + 12 12 **Table of Contents:** 13 13 14 14 (% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %) ... ... @@ -54,6 +54,7 @@ 54 54 55 55 == 1.2 Features == 56 56 63 + 57 57 * LoRaWAN 1.0.3 Class A 58 58 * Ultra-low power consumption 59 59 * Supports GroPoint Profile ... ... @@ -67,9 +67,9 @@ 67 67 68 68 69 69 70 - 71 71 == 1.3 Probe Specification == 72 72 79 + 73 73 ((( 74 74 GroPoint Air includes an M12 5-pin connector, the pins definition matches GroPoint Profile M12 version probes. Users can connect this connector to GroPoint Profile directly. 75 75 ))) ... ... @@ -79,25 +79,29 @@ 79 79 ))) 80 80 81 81 89 + 82 82 == 1.4 Applications == 83 83 92 + 84 84 * Smart Agriculture 85 85 86 86 87 87 88 88 89 - 90 90 == 1.5 Pin Mapping == 91 91 100 + 92 92 Inner PCB Pin mapping for reference: 93 93 94 94 (% aria-label="image-20220530002453-3.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220530002453-3.png||data-widget="image" height="262" width="493"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 95 95 96 96 106 + 97 97 = 2. Connect LoRaWAN Network = 98 98 99 99 == 2.1 LED Indicator == 100 100 111 + 101 101 The GroPoint Air has an internal LED which can show the status of different states. 102 102 103 103 * The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected. ... ... @@ -106,10 +106,9 @@ 106 106 107 107 108 108 109 - 110 - 111 111 == 2.2 Firmware and Changelog == 112 112 122 + 113 113 ((( 114 114 Firmware Download Location: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/GroPoint_Air/firmware/>>https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/GroPoint_Air/firmware/]] 115 115 ))) ... ... @@ -123,10 +123,12 @@ 123 123 ))) 124 124 125 125 136 + 126 126 = 3. How to use? = 127 127 128 128 == 3.1 Connect to GroPoint Profile == 129 129 141 + 130 130 ((( 131 131 GroPoint Air must be used with [[GroPoint Profile>>https://www.gropoint.com/products/soil-sensors/gropoint-profile]]. There are different interface model from GroPoint, users need to choose the one: 132 132 ))) ... ... @@ -143,13 +143,17 @@ 143 143 ))) 144 144 145 145 158 + 146 146 == 3.2 Connect to LoRaWAN Network? == 147 147 161 + 148 148 Each GroPoint Air is shipped with a worldwide unique set of OTAA keys. To use GroPoint Air in a LoRaWAN network, user needs to input the OTAA keys in the LoRaWAN network server. So GroPoint Air can join the LoRaWAN network and start to transmit sensor data 149 149 150 150 165 + 151 151 == 3.3 Example to use for LoRaWAN network == 152 152 168 + 153 153 ((( 154 154 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Usages with other LoRaWAN IoT servers are similar. 155 155 ))) ... ... @@ -217,26 +217,42 @@ 217 217 218 218 == 3.4 Uplink Payload Analyze == 219 219 236 + 237 +((( 220 220 Uplink payloads have two types: 239 +))) 221 221 222 222 * ((( 242 +((( 223 223 Report temperature and humidity status normally: Use FPORT=2 224 224 ))) 245 +))) 225 225 * ((( 247 +((( 226 226 Other control commands: Use other FPORT fields. 227 227 ))) 250 +))) 228 228 252 +((( 229 229 The application server should parse the correct value based on FPORT settings. 254 +))) 230 230 231 231 257 + 232 232 == 3.5 temperature and humidity Value, Uplink FPORT~=2 == 233 233 234 234 261 +((( 235 235 GroPoint Air will send this uplink after Device Status once join the LoRaWAN network successfully. And GroPoint Air will: 263 +))) 236 236 265 +((( 237 237 periodically send this uplink every 20 minutes, this interval can be changed. 267 +))) 238 238 269 +((( 239 239 The drawing below shows the probe dimensions of the 2-8 segment probes, Temperature sen sor locations provided in table below: 271 +))) 240 240 241 241 (% aria-label="image-20220621093414-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220621093414-1.png||data-widget="image" height="932" width="816"]](% title="Click and drag to resize" %) 242 242 ... ... @@ -253,20 +253,34 @@ 253 253 (% aria-label="image-20220611174943-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220611174943-1.png||data-widget="image" height="139" width="1008"]](% title="Click and drag to resize" %) 254 254 255 255 288 +((( 256 256 For US915 frequency, when DR=0 and the payload length exceeds 11, the DR of this packet is switched to 1. 290 +))) 257 257 292 +((( 258 258 For AU915 frequency, when DR=2,Dwelltime=1 and the payload length exceeds 11, the DR of this packet is switched to 3. 294 +))) 259 259 296 +((( 260 260 For AS923 frequency, when DR=2,Dwelltime=1 and the payload length exceeds 11, the DR of this packet is switched to 3. 298 +))) 261 261 262 262 301 + 263 263 == 3.6 Show data on Datacake == 264 264 304 + 305 +((( 265 265 Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps: 307 +))) 266 266 309 +((( 267 267 (% style="color:blue" %)**Step 1**(%%): Link TTNv3 to Datacake [[https:~~/~~/docs.datacake.de/lorawan/lns/thethingsindustries#create-integration-on-tti>>url:https://docs.datacake.de/lorawan/lns/thethingsindustries#create-integration-on-tti]] 311 +))) 268 268 313 +((( 269 269 (% style="color:blue" %)**Step 2**(%%): Configure SW3L in Datacake 315 +))) 270 270 271 271 (% aria-label="image-20220613171007-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220613171007-1.png||data-widget="image" height="567" width="542"]](% title="Click and drag to resize" %) 272 272 ... ... @@ -292,38 +292,63 @@ 292 292 293 293 = 4. Configure GroPoint Air via AT Command or LoRaWAN Downlink = 294 294 341 + 342 +((( 295 295 Use can configure GroPoint Air via AT Command or LoRaWAN Downlink. 344 +))) 296 296 297 -* AT Command Connection: See [[FAQ>>url:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/#H6.FAQ]]. 298 -* LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>url:http://8.211.40.43/xwiki/bin/view/Main/]] 346 +* ((( 347 +AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]]. 348 +))) 349 +* ((( 350 +LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>url:http://8.211.40.43/xwiki/bin/view/Main/]] 351 +))) 299 299 353 +((( 300 300 There are two kinds of commands to configure GroPoint Air, they are: 355 +))) 301 301 302 302 * ((( 358 +((( 303 303 **~ (% style="color:#4472c4" %)General Commands(%%)**(% style="color:#4472c4" %). 304 304 ))) 361 +))) 305 305 363 +((( 306 306 These commands are to configure: 365 +))) 307 307 308 -* General system settings like: uplink interval. 309 -* LoRaWAN protocol & radio-related command. 367 +* ((( 368 +General system settings like: uplink interval. 369 +))) 370 +* ((( 371 +LoRaWAN protocol & radio-related command. 372 +))) 310 310 374 +((( 311 311 They are the same for all Dragino Device that support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki: [[End Device AT Commands and Downlink Command>>url:http://8.211.40.43/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]] 376 +))) 312 312 313 313 314 314 315 315 * ((( 381 +((( 316 316 **~ (% style="color:#4472c4" %)Commands special design for GroPoint Air(%%)** 317 317 ))) 384 +))) 318 318 386 +((( 319 319 These commands only valid for GroPoint Air, as below: 388 +))) 320 320 321 321 322 322 323 323 == 4.1 Set Transmit Interval Time == 324 324 394 + 325 325 Feature: Change LoRaWAN End Node Transmit Interval. 326 326 397 + 327 327 (% style="color:#037691" %)**AT Command: AT+TDC** 328 328 329 329 (% aria-label="image-20220607171554-8.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/image-20220607171554-8.png?rev=1.1||alt="image-20220607171554-8.png" data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) ... ... @@ -340,12 +340,12 @@ 340 340 341 341 342 342 343 - 344 - 345 345 == 4.2 Set Interrupt Mode == 346 346 416 + 347 347 Feature, Set Interrupt mode for GPIO_EXIT. 348 348 419 + 349 349 (% style="color:#037691" %)**AT Command: AT+INTMOD** 350 350 351 351 (% aria-label="image-20220607171716-9.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/image-20220607171716-9.png?rev=1.1||alt="image-20220607171716-9.png" data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) ... ... @@ -362,17 +362,28 @@ 362 362 363 363 364 364 365 - 366 - 367 367 == 4.3 Set the sensor delay time == 368 368 438 + 439 +((( 369 369 Feature: Change the sensor delay time. 370 370 442 + 443 +))) 444 + 445 +((( 371 371 There are six models of GroPoint Air, and each model returns a different number of temperature and humidity. The more bytes of the returned value, the longer the delay. The AT+SDELAY command can adjust the time that the sensor returns data to the node, and can adjust different delays according to different types of sensors. 447 +))) 372 372 449 +((( 373 373 The default delay is 1000ms. 374 374 452 + 453 +))) 454 + 455 +((( 375 375 (% style="color:#037691" %)**AT Command: AT+SDELAY** 457 +))) 376 376 377 377 (% aria-label="image-20220613175511-8.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220613175511-8.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 378 378 ... ... @@ -388,19 +388,22 @@ 388 388 389 389 390 390 391 - 392 - 393 393 == 4.4 Query sensor model function == 394 394 475 + 395 395 Feature: Using this function will re-update the model. 396 396 478 + 397 397 (% style="color:#037691" %)**Downlink Command: 0xFA00** 398 398 399 399 482 + 400 400 == 4.5 Get Firmware Version Info == 401 401 485 + 402 402 Feature: use downlink to get firmware version. 403 403 488 + 404 404 (% style="color:#037691" %)**Downlink Command: 0x26** 405 405 406 406 (% aria-label="image-20220607171917-10.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/image-20220607171917-10.png?rev=1.1||alt="image-20220607171917-10.png" data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) ... ... @@ -471,8 +471,10 @@ 471 471 472 472 = 5. Use AT Command = 473 473 559 + 474 474 == 5.1 Access AT Commands == 475 475 562 + 476 476 GroPoint Air supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to GroPoint Air for using AT command, as below. 477 477 478 478 (% aria-label="1654593668970-604.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:Main.User Manual for LoRaWAN End Nodes.LLMS01-LoRaWAN Leaf Moisture Sensor User Manual.WebHome@1654593668970-604.png||data-widget="image" height="297" width="474"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) ... ... @@ -486,7 +486,9 @@ 486 486 (% style="background-color:yellow" %)** USB TTL RXD <~-~-~-~-> UART_TXD** 487 487 488 488 576 +((( 489 489 In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for GroPoint Air. GroPoint Air will output system info once power on as below: 578 +))) 490 490 491 491 (% aria-label="1654653659449-932.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:Main.User Manual for LoRaWAN End Nodes.LLMS01-LoRaWAN Leaf Moisture Sensor User Manual.WebHome@1654653659449-932.png||data-widget="image" height="471" width="674"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 492 492 ... ... @@ -493,13 +493,19 @@ 493 493 Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureGroPointAirviaATCommandorLoRaWANDownlink"]]. 494 494 495 495 585 + 496 496 = 6. Battery & How to replace = 497 497 498 498 == 6.1 Battery Type == 499 499 590 + 591 +((( 500 500 GroPoint Air is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is an un-rechargeable battery with a low discharge rate targeting more than 5 years use. This type of battery is commonly used in IoT targets for long-term running, such as water meters. 593 +))) 501 501 595 +((( 502 502 The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance. 597 +))) 503 503 504 504 505 505 (% aria-label="1654593587246-335.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/1654593587246-335.png?rev=1.1||alt="1654593587246-335.png" data-widget="image" height="408" width="574"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) ... ... @@ -509,29 +509,47 @@ 509 509 GroPoint Air: 2.45v ~~ 3.6v 510 510 511 511 607 + 512 512 == 6.2 Power Consumption Analyze == 513 513 610 + 611 +((( 514 514 Dragino Battery-powered products are all runs in Low Power mode. We have an updated 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 intervals. 613 +))) 515 515 615 +((( 516 516 Instruction to use as below: 617 +))) 517 517 518 518 620 +((( 519 519 (% style="color:blue" %)**Step 1**(%%): Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from: [[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/]] 622 +))) 520 520 521 521 625 +((( 522 522 (% style="color:blue" %)**Step 2**(%%): Open it and choose 627 +))) 523 523 524 524 * ((( 630 +((( 525 525 Product Model 526 526 ))) 633 +))) 527 527 * ((( 635 +((( 528 528 Uplink Interval 529 529 ))) 638 +))) 530 530 * ((( 640 +((( 531 531 Working Mode 532 532 ))) 643 +))) 533 533 645 +((( 534 534 And the Life expectation in different cases will be shown on the right. 647 +))) 535 535 536 536 (% aria-label="1654593605679-189.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/1654593605679-189.png?rev=1.1||alt="1654593605679-189.png" data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 537 537 ... ... @@ -550,19 +550,23 @@ 550 550 (% aria-label="image-20220607172042-11.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLMS01-LoRaWAN%20Leaf%20Moisture%20Sensor%20User%20Manual/WebHome/image-20220607172042-11.png?rev=1.1||alt="image-20220607172042-11.png" data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %) 551 551 552 552 666 + 553 553 === 6.2.1 Battery Note === 554 554 669 + 555 555 The Li-SICO battery is designed for small current / long period applications. 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 to transmit LoRa, then the battery life may be decreased. 556 556 557 557 673 + 558 558 === 6.2.2 Replace the battery === 559 559 676 + 560 560 ((( 561 561 You can change the battery in GroPoint Air. The type of battery is not limited as long as the output is between 3v to 3.6v. 562 562 ))) 563 563 564 564 ((( 565 -The default battery pack of GroPoint Air includes a ER26500 plus supercapacitor. If users can ’t find this pack locally, they can find ER26500 or equivalence, which will also work in most cases. The SPC can enlarge the battery life for high-frequency use (update period below 5 minutes).682 +The default battery pack of GroPoint Air includes a ER26500 plus supercapacitor. If users can't find this pack locally, they can find ER26500 or equivalence, which will also work in most cases. The SPC can enlarge the battery life for high-frequency use (update period below 5 minutes). 566 566 ))) 567 567 568 568 ... ... @@ -569,26 +569,35 @@ 569 569 570 570 = 7. FAQ = 571 571 689 + 572 572 == 7.1 How to change the LoRa Frequency Bands/Region == 573 573 692 + 574 574 You can follow the instruction here: [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome||anchor="H2.HardwareUpgradeMethodSupportList"]]. 575 575 When downloading the images, choose the required image file for download. 576 576 577 577 697 + 578 578 = 8. Trouble Shooting = 579 579 700 + 580 580 == 8.1 AT Commands input doesn't work == 581 581 582 -In 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 pressing the send key, user need to add ENTER in their string. 583 583 704 +In 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 pressing the send key, user need to add ENTER in their string. 584 584 706 + 707 + 585 585 == 8.2 Why i see the payload is 7FFF? == 586 586 710 + 587 587 The device will judge the length of the data received by the serial port. If the length of the received data is 0, it means that there is a problem with the sensor communication or the sensor is not connected properly, it is invalid data, and the uploaded data is 7FFF. 588 588 589 589 714 + 590 590 = 9. Order Info = 591 591 717 + 592 592 Part Number: (% style="color:blue" %)**GROPOINT AIR-M-XX** 593 593 594 594 (% style="color:blue" %)**XX**(%%): The default frequency band ... ... @@ -606,15 +606,18 @@ 606 606 607 607 608 608 609 - 610 - 611 611 = 10. Packing Info = 612 612 737 + 738 +((( 613 613 **Package Includes: ** 740 +))) 614 614 615 615 * GroPoint Air-M x 1 616 616 744 +((( 617 617 **Dimension and weight:** 746 +))) 618 618 619 619 * Device Size: cm 620 620 * Device Weight: g