Last modified by Bei Jinggeng on 2024/03/30 17:53
<
From version < 52.2 >
edited by Xiaoling
on 2022/09/23 11:31
To version < 56.12 >
edited by Xiaoling
on 2023/05/23 16:42
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Summary

Details

Page properties
Content
... ... @@ -9,20 +9,34 @@
9 9  
10 10  = 1.  Introduction =
11 11  
12 -
13 13  == 1.1 ​ What is NSPH01 Soil pH Sensor ==
14 14  
15 15  
15 +(((
16 16  The Dragino NSPH01 is a (% style="color:blue" %)**NB-IoT soil pH sensor**(%%) for IoT of Agriculture. It is designed to measure the soil pH and soil temperature, so to send to the platform to analyze the soil acid or alkali level. The probe is IP68 waterproof.
17 +)))
17 17  
19 +(((
18 18  NSPH01 probe is made by Solid AgCl reference electrode and Pure metal pH sensitive electrode. It can detect soil's** (% style="color:blue" %)pH (%%)**with high accuracy and stable value. The NSPH01 probe can be buried into soil for long time use.
21 +)))
19 19  
23 +(((
20 20  NarrowBand-Internet of Things (NB-IoT) is a standards-based low power wide area (LPWA) technology developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity and spectrum efficiency, especially in deep coverage.
21 -\\NSPH01 supports different uplink methods include (% style="color:blue" %)**TCP,MQTT,UDP and CoAP  **(%%)for different application requirement.
22 -\\NSPH01 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
23 -\\To use NSPH01, user needs to check if there is NB-IoT coverage in the installation area and with the bands NSPH01 supports. If the local operator supports it, user needs to get a (% style="color:blue" %)**NB-IoT SIM card** (%%)from local operator and install NSPH01 to get NB-IoT network connection.
25 +)))
24 24  
27 +(((
28 +NSPH01 supports different uplink methods include (% style="color:blue" %)**TCP,MQTT,UDP and CoAP  **(%%)for different application requirement.
29 +)))
25 25  
31 +(((
32 +NSPH01 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
33 +)))
34 +
35 +(((
36 +To use NSPH01, user needs to check if there is NB-IoT coverage in the installation area and with the bands NSPH01 supports. If the local operator supports it, user needs to get a (% style="color:blue" %)**NB-IoT SIM card** (%%)from local operator and install NSPH01 to get NB-IoT network connection.
37 +)))
38 +
39 +
26 26  [[image:image-20220907153151-1.png]]
27 27  
28 28  
... ... @@ -29,7 +29,6 @@
29 29  [[image:M_K`YF9`CAYAE\@}3T]FHT$9.png]]
30 30  
31 31  
32 -
33 33  == 1.2  Features ==
34 34  
35 35  
... ... @@ -48,8 +48,6 @@
48 48  * Micro SIM card slot
49 49  * 8500mAh Battery for long term use
50 50  
51 -
52 -
53 53  == 1.3  Specification ==
54 54  
55 55  
... ... @@ -60,15 +60,13 @@
60 60  
61 61  (% style="color:#037691" %)**NB-IoT Spec:**
62 62  
63 -* - B1 @H-FDD: 2100MHz
64 -* - B3 @H-FDD: 1800MHz
65 -* - B8 @H-FDD: 900MHz
66 -* - B5 @H-FDD: 850MHz
67 -* - B20 @H-FDD: 800MHz
68 -* - B28 @H-FDD: 700MHz
74 +* B1 @H-FDD: 2100MHz
75 +* B3 @H-FDD: 1800MHz
76 +* B8 @H-FDD: 900MHz
77 +* B5 @H-FDD: 850MHz
78 +* B20 @H-FDD: 800MHz
79 +* B28 @H-FDD: 700MHz
69 69  
70 -
71 -
72 72  == 1.4  Probe Specification ==
73 73  
74 74  
... ... @@ -89,15 +89,11 @@
89 89  * IP68 Protection
90 90  * Length: 3.5 meters
91 91  
92 -
93 -
94 94  == 1.5  ​Applications ==
95 95  
96 96  
97 97  * Smart Agriculture
98 98  
99 -
100 -
101 101  == 1.6  Pin mapping and power on ==
102 102  
103 103  
... ... @@ -104,10 +104,8 @@
104 104  [[image:image-20220907153300-2.png]]
105 105  
106 106  
107 -
108 108  = 2.  Use NSPH01 to communicate with IoT Server =
109 109  
110 -
111 111  == 2.1  How it works ==
112 112  
113 113  
... ... @@ -119,10 +119,8 @@
119 119  [[image:image-20220907153416-3.png]]
120 120  
121 121  
122 -
123 123  == 2.2 ​ Configure the NSPH01 ==
124 124  
125 -
126 126  === 2.2.1 Test Requirement ===
127 127  
128 128  
... ... @@ -132,8 +132,6 @@
132 132  * The local NB-IoT network used the band that NSPH01 supports.
133 133  * Your operator is able to distribute the data received in their NB-IoT network to your IoT server.
134 134  
135 -
136 -
137 137  Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NSPH01 will use** CoAP(120.24.4.116:5683) **or raw **UDP(120.24.4.116:5601)** or **MQTT(120.24.4.116:1883)**or **TCP(120.24.4.116:5600)**protocol to send data to the test server.
138 138  
139 139  
... ... @@ -140,7 +140,6 @@
140 140  [[image:image-20220907153445-4.png]]
141 141  
142 142  
143 -
144 144  === 2.2.2 Insert SIM card ===
145 145  
146 146  
... ... @@ -150,7 +150,6 @@
150 150  [[image:image-20220907153505-5.png]]
151 151  
152 152  
153 -
154 154  === 2.2.3 Connect USB – TTL to NSPH01 to configure it ===
155 155  
156 156  
... ... @@ -174,8 +174,6 @@
174 174  * Parity:  (% style="color:green" %)**None**
175 175  * Flow Control: (% style="color:green" %)**None**
176 176  
177 -
178 -
179 179  Make sure the switch is in FLASH position, then power on device by connecting the jumper on NSPH01. NSPH01 will output system info once power on as below, we can enter the (% style="color:green" %)**password: 12345678**(%%) to access AT Command input.
180 180  
181 181  
... ... @@ -185,7 +185,6 @@
185 185  (% style="color:red" %)**Note: the valid AT Commands can be found at:**(%%)**  **[[**https:~~/~~/www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0**>>url:https://www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0]]
186 186  
187 187  
188 -
189 189  === 2.2.4 Use CoAP protocol to uplink data ===
190 190  
191 191  
... ... @@ -210,7 +210,6 @@
210 210  [[image:image-20220907153612-8.png||height="529" width="729"]]
211 211  
212 212  
213 -
214 214  === 2.2.5 Use UDP protocol to uplink data(Default protocol) ===
215 215  
216 216  
... ... @@ -220,8 +220,6 @@
220 220  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5601   ** (%%) ~/~/  to set UDP server address and port
221 221  * (% style="color:blue" %)**AT+CFM=1       ** (%%) ~/~/  If the server does not respond, this command is unnecessar
222 222  
223 -
224 -
225 225  [[image:image-20220907153643-9.png||height="401" width="734"]]
226 226  
227 227  
... ... @@ -228,7 +228,6 @@
228 228  [[image:image-20220907153703-10.png||height="309" width="738"]]
229 229  
230 230  
231 -
232 232  === 2.2.6 Use MQTT protocol to uplink data ===
233 233  
234 234  
... ... @@ -242,8 +242,6 @@
242 242  * (% style="color:blue" %)**AT+PUBTOPIC=NSE01_PUB                    **(%%)~/~/ Set the sending topic of MQTT
243 243  * (% style="color:blue" %)**AT+SUBTOPIC=NSE01_SUB          ** (%%) ~/~/ Set the subscription topic of MQTT
244 244  
245 -
246 -
247 247  [[image:image-20220907153739-11.png||height="491" width="764"]]
248 248  
249 249  
... ... @@ -253,8 +253,6 @@
253 253  MQTT protocol has a much higher power consumption compare vs UDP / CoAP protocol. Please check the power analyze document and adjust the uplink period to a suitable interval.
254 254  
255 255  
256 -
257 -
258 258  === 2.2.7 Use TCP protocol to uplink data ===
259 259  
260 260  
... ... @@ -263,8 +263,6 @@
263 263  * (% style="color:blue" %)**AT+PRO=4   ** (%%) ~/~/ Set to use TCP protocol to uplink
264 264  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5600   ** (%%) ~/~/ to set TCP server address and port
265 265  
266 -
267 -
268 268  [[image:image-20220907153818-13.png||height="486" width="668"]]
269 269  
270 270  
... ... @@ -271,7 +271,6 @@
271 271  [[image:image-20220907153827-14.png||height="236" width="684"]]
272 272  
273 273  
274 -
275 275  === 2.2.8 Change Update Interval ===
276 276  
277 277  
... ... @@ -282,7 +282,6 @@
282 282  (% style="color:red" %)**NOTE: By default, the device will send an uplink message every 2 hours. Each Uplink Include 8 set of records in this 2 hour (15 minute interval / record).**
283 283  
284 284  
285 -
286 286  == 2.3  Uplink Payload ==
287 287  
288 288  
... ... @@ -290,8 +290,8 @@
290 290  
291 291  Each time the device uploads a data package, 8 sets of recorded data will be attached. Up to 32 sets of recorded data can be uploaded.
292 292  
293 -(% border="2" style="background-color:#ffffcc; color:green; width:1160px" %)
294 -|(% style="width:96px" %)**Size(bytes)**|(% style="width:83px" %)**8**|(% style="width:44px" %)**2**|(% style="width:42px" %)**2**|(% style="width:124px" %)1|(% style="width:57px" %)1|(% style="width:80px" %)1|(% style="width:69px" %)2|(% style="width:134px" %)2|(% style="width:98px" %)4|(% style="width:134px" %)2|(% style="width:68px" %)2|(% style="width:125px" %)4
275 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:520px" %)
276 +|(% style="width:50px" %)**Size(bytes)**|(% style="width:40px" %)**8**|(% style="width:20px" %)**2**|(% style="width:25px" %)**2**|(% style="width:60px" %)**1**|(% style="width:20px" %)**1**|(% style="width:40px" %)**1**|(% style="width:40px" %)**2**|(% style="width:50px" %)**2**|(% style="width:50px" %)**4**|(% style="width:50px" %)**2**|(% style="width:35px" %)**2**|(% style="width:40px" %)**4**
295 295  |(% style="width:96px" %)**Value**|(% style="width:83px" %)Device ID|(% style="width:44px" %)Ver|(% style="width:42px" %)BAT|(% style="width:124px" %)Signal Strength|(% style="width:57px" %)MOD|(% style="width:80px" %)Interrupt|(% style="width:69px" %)Soil PH|(% style="width:134px" %)Soil Temperature|(% style="width:98px" %)Time stamp|(% style="width:134px" %)Soil Temperature|(% style="width:68px" %)Soil PH|(% style="width:125px" %)Time stamp  .....
296 296  
297 297  If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NSPH01 uplink data.
... ... @@ -314,27 +314,33 @@
314 314  (((
315 315  
316 316  
317 -where:
299 +**where:**
318 318  )))
319 319  
320 -* Device ID: 0xf868411056754138 = f868411056754138
321 -* Version:  0x0064=100=1.0.0
322 -* BAT:  0x0c78 = 3192 mV = 3.192V
323 -* Singal: 0x17 = 23
324 -* Mod:  0x01 = 1
325 -* Interrupt: 0x00= 0
326 -* Soil PH:  0x0225= 549 = 5.49
327 -* Soil Temperature: 0x010b =267=26.7 °C
328 -* Time stamp :  0x6315537b =1662342011  ([[Unix Epoch Time>>url:http://www.epochconverter.com/]])
329 -* Soil Temperature,Soil PH,Time stamp :  010b0226631550fb
330 -* 8 sets of recorded data: Temperature,Soil PH,Time stamp :  010e022663154d77,.......
302 +* (% style="color:#037691" %)**Device ID:**(%%)** **0xf868411056754138 = f868411056754138
331 331  
304 +* (% style="color:#037691" %)**Version:**  (%%) 0x0064=100=1.0.0
332 332  
306 +* (% style="color:#037691" %)**BAT:**   (%%) 0x0c78 = 3192 mV = 3.192V
333 333  
308 +* (% style="color:#037691" %)**Singal:** (%%)0x17 = 23
334 334  
335 -== 2.4  Payload Explanation and Sensor Interface ==
310 +* (% style="color:#037691" %)**Mod:** (%%) 0x01 = 1
336 336  
312 +* (% style="color:#037691" %)**Interrupt:**(%%) 0x00= 0
337 337  
314 +* (% style="color:#037691" %)**Soil PH:** (%%) 0x0225= 549 = 5.49
315 +
316 +* (% style="color:#037691" %)**Soil Temperature:**(%%) 0x010b =267=26.7 °C
317 +
318 +* (% style="color:#037691" %)**Time stamp :**   (%%) 0x6315537b =1662342011  ([[Unix Epoch Time>>url:http://www.epochconverter.com/]])
319 +
320 +* (% style="color:#037691" %)**Soil Temperature,Soil PH,Time stamp : **(%%) 010b0226631550fb
321 +
322 +* (% style="color:#037691" %)**8 sets of recorded data:**(%%) Temperature,Soil PH,Time stamp :  010e022663154d77,.......
323 +
324 +== 2.4  Payload Explanation and Sensor Interface ==
325 +
338 338  === 2.4.1  Device ID ===
339 339  
340 340  
... ... @@ -350,7 +350,6 @@
350 350  The Device ID is stored in a none-erase area, Upgrade the firmware or run AT+FDR won't erase Device ID.
351 351  
352 352  
353 -
354 354  === 2.4.2  Version Info ===
355 355  
356 356  
... ... @@ -359,7 +359,6 @@
359 359  For example: 0x00 64 : this device is NSPH01 with firmware version 1.0.0.
360 360  
361 361  
362 -
363 363  === 2.4.3  Battery Info ===
364 364  
365 365  
... ... @@ -370,7 +370,6 @@
370 370  Ex2: 0x0B49 = 2889mV
371 371  
372 372  
373 -
374 374  === 2.4.4  Signal Strength ===
375 375  
376 376  
... ... @@ -389,7 +389,6 @@
389 389  **99**    Not known or not detectable
390 390  
391 391  
392 -
393 393  === 2.4.5  Soil PH ===
394 394  
395 395  
... ... @@ -400,7 +400,6 @@
400 400  (% style="color:blue" %)**0229(H) = 549(D) /100 = 5.49.**
401 401  
402 402  
403 -
404 404  === 2.4.6  Soil Temperature ===
405 405  
406 406  
... ... @@ -414,7 +414,6 @@
414 414  If payload is FF7EH: ((FF7E & 0x8000)>>15 ===1),temp = (FF7E(H)-FFFF(H))/10 = -12.9 °C
415 415  
416 416  
417 -
418 418  === 2.4.7  Timestamp ===
419 419  
420 420  
... ... @@ -423,7 +423,6 @@
423 423  Convert Unix timestamp to time 2022-9-5 9:40:11.
424 424  
425 425  
426 -
427 427  === 2.4.8  Digital Interrupt ===
428 428  
429 429  
... ... @@ -443,7 +443,6 @@
443 443  0x(01): Interrupt Uplink Packet.
444 444  
445 445  
446 -
447 447  === 2.4.9  ​+5V Output ===
448 448  
449 449  
... ... @@ -456,7 +456,6 @@
456 456  Means set 5V valid time to have 1000ms. So the real 5V output will actually have 1000ms + sampling time for other sensors.** **
457 457  
458 458  
459 -
460 460  == 2.5  Downlink Payload ==
461 461  
462 462  
... ... @@ -484,7 +484,6 @@
484 484  Downlink Payload: 06000003, Set AT+INTMOD=3
485 485  
486 486  
487 -
488 488  == 2.6  ​LED Indicator ==
489 489  
490 490  
... ... @@ -495,12 +495,8 @@
495 495  * After NSPH01 join NB-IoT network. The LED will be ON for 3 seconds.
496 496  * For each uplink probe, LED will be on for 500ms.
497 497  
498 -
499 -
500 -
501 501  == 2.7  Installation and Maintain ==
502 502  
503 -
504 504  === 2.7.1  Before measurement ===
505 505  
506 506  
... ... @@ -507,7 +507,6 @@
507 507  If the NSPH01 has more than 7 days not use or just clean the pH probe. User should put the probe inside pure water for more than 24 hours for activation. If no put in water, user need to put inside soil for more than 24 hours to ensure the measurement accuracy. 
508 508  
509 509  
510 -
511 511  === 2.7.2  Measurement ===
512 512  
513 513  
... ... @@ -532,7 +532,6 @@
532 532  Insert the probe inside, method like measure the surface.
533 533  
534 534  
535 -
536 536  === 2.7.3  Maintain Probe ===
537 537  
538 538  
... ... @@ -543,9 +543,6 @@
543 543  1. Avoid the probes to touch oily matter. Which will cause issue in accuracy.
544 544  1. The probe is IP68 can be put in water.
545 545  
546 -
547 -
548 -
549 549  == 2.8  PH and Temperature alarm function ==
550 550  
551 551  
... ... @@ -578,7 +578,6 @@
578 578  AT+ TEMPALARM=20,30  ~/~/ Alarm when temperature lower than 20.
579 579  
580 580  
581 -
582 582  == 2.9  Set the number of data to be uploaded and the recording time ==
583 583  
584 584  
... ... @@ -587,7 +587,9 @@
587 587  * (% style="color:blue" %)**AT+TR=900**     (%%) ~/~/  The unit is seconds, and the default is to record data once every 900 seconds.( The minimum can be set to 180 seconds)
588 588  * (% style="color:blue" %)**AT+NOUD=8**     (%%) ~/~/  The device uploads 8 sets of recorded data by default. Up to 32 sets of record data can be uploaded.
589 589  
558 + The diagram below explains the relationship between TR, NOUD, and TDC more clearly**:**
590 590  
560 +[[image:image-20221009000933-1.png||height="750" width="1043"]]
591 591  
592 592  
593 593  == 2.10  Read or Clear cached data ==
... ... @@ -598,12 +598,9 @@
598 598  * (% style="color:blue" %)**AT+CDP**        (%%) ~/~/  Read cached data
599 599  * (% style="color:blue" %)**AT+CDP=0**    (%%) ~/~/  Clear cached data
600 600  
601 -
602 -
603 603  [[image:image-20220907154700-19.png]]
604 604  
605 605  
606 -
607 607  == 2.11  Calibration ==
608 608  
609 609  
... ... @@ -615,7 +615,6 @@
615 615  [[image:image-20220907154700-20.png]] ​
616 616  
617 617  
618 -
619 619  == 2.12  ​Firmware Change Log ==
620 620  
621 621  
... ... @@ -624,64 +624,14 @@
624 624  Upgrade Instruction: [[Upgrade Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
625 625  
626 626  
593 +== 2.13 Battery & Power Consumption ==
627 627  
628 -== 2.13  ​Battery Analysis ==
629 629  
596 +NSPH01 uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
630 630  
631 -=== 2.13.1  ​Battery Type ===
598 +[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
632 632  
633 633  
634 -The NSPH01 battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-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.
635 -
636 -The battery is designed to last for several years depends on the actually use environment and update interval. 
637 -
638 -The battery-related documents as below:
639 -
640 -* [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
641 -* [[Lithium-Thionyl Chloride Battery datasheet>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
642 -* [[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
643 -
644 -[[image:image-20220907154700-21.png]] ​
645 -
646 -
647 -
648 -=== 2.13.2  Power consumption Analyze ===
649 -
650 -
651 -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.
652 -
653 -Instruction to use as below:
654 -
655 -(% 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/]]
656 -
657 -(% style="color:blue" %)**Step 2: **(%%) Open it and choose
658 -
659 -* Product Model
660 -* Uplink Interval
661 -* Working Mode
662 -
663 -And the Life expectation in difference case will be shown on the right.
664 -
665 -
666 -[[image:image-20220907154700-22.jpeg]]
667 -
668 -​
669 -
670 -
671 -=== 2.13.3  ​Battery Note ===
672 -
673 -
674 -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.
675 -
676 -
677 -
678 -=== 2.13.4  Replace the battery ===
679 -
680 -
681 -The default battery pack of NSPH01 includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).
682 -
683 -
684 -
685 685  = 3. ​ Access NB-IoT Module =
686 686  
687 687  
... ... @@ -694,10 +694,8 @@
694 694  
695 695  ​
696 696  
697 -
698 698  = 4.  Using the AT Commands =
699 699  
700 -
701 701  == 4.1  Access AT Commands ==
702 702  
703 703  
... ... @@ -787,10 +787,8 @@
787 787  AT+PWORD  : Serial Access Password
788 788  
789 789  
790 -
791 791  = ​5.  FAQ =
792 792  
793 -
794 794  == 5.1 ​ How to Upgrade Firmware ==
795 795  
796 796  
... ... @@ -801,7 +801,6 @@
801 801  (% style="color:red" %)**Notice, NSPH01 and LSPH01 share the same mother board. They use the same connection and method to update.**
802 802  
803 803  
804 -
805 805  == 5.2  Can I calibrate NSPH01 to different soil types? ==
806 806  
807 807  
... ... @@ -808,10 +808,8 @@
808 808  NSPH01 is calibrated for saline-alkali soil and loamy soil. If users want to use it for other soil, they can calibrate the value in the IoT platform base on the value measured by saline-alkali soil and loamy soil. The formula can be found at [[this link>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/LSE01/Calibrate_to_other_Soil_20220605.pdf]].
809 809  
810 810  
811 -
812 812  = 6.  Trouble Shooting =
813 813  
814 -
815 815  == 6.1  ​Connection problem when uploading firmware ==
816 816  
817 817  
... ... @@ -818,7 +818,6 @@
818 818  **Please see: **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting]]
819 819  
820 820  
821 -
822 822  == 6.2  AT Command input doesn't work ==
823 823  
824 824  
... ... @@ -825,7 +825,12 @@
825 825  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.
826 826  
827 827  
736 +== 6.3 Not able to connect to NB-IoT network and keep showing "Signal Strength:99". ==
828 828  
738 +
739 +This means sensor is trying to join the NB-IoT network but fail. Please see this link for **//[[trouble shooting for signal strenght:99>>doc:Main.CSQ\:99,99.WebHome]]//**.
740 +
741 +
829 829  = 7. ​ Order Info =
830 830  
831 831  
... ... @@ -832,7 +832,6 @@
832 832  Part Number**:** NSPH01
833 833  
834 834  
835 -
836 836  = 8.  Packing Info =
837 837  
838 838  
... ... @@ -848,9 +848,6 @@
848 848  * Package Size / pcs : cm
849 849  * Weight / pcs : g
850 850  
851 -
852 -
853 -
854 854  = 9.  Support =
855 855  
856 856  
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