Changes for page DS20L -- LoRaWAN Smart Distance Detector User Manual 01
Last modified by Mengting Qiu on 2023/12/14 11:15
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edited by Mengting Qiu
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... ... @@ -1,1 +1,1 @@ 1 -XWiki. ting1 +XWiki.Xiaoling - Content
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... ... @@ -8,7 +8,7 @@ 8 8 9 9 10 10 11 -**Table of Contents :(% style="display:none" %) (%%)**11 +**Table of Contents:** 12 12 13 13 {{toc/}} 14 14 ... ... @@ -91,7 +91,7 @@ 91 91 92 92 [[image:image-20231110102635-5.png||height="402" width="807"]](% style="display:none" %) 93 93 94 -= ==Step 1: Create a device in TTN with the OTAA keys from DS20L.===94 +(% style="color:blue" %)**Step 1:**(%%) Create a device in TTN with the OTAA keys from DS20L. 95 95 96 96 Each DS20L is shipped with a sticker with the default device EUI as below: 97 97 ... ... @@ -98,22 +98,32 @@ 98 98 [[image:image-20230426084152-1.png||alt="图片-20230426084152-1.png" height="233" width="502"]] 99 99 100 100 101 -You can enter this key in the LoRaWAN Server portal. V3screenshot:101 +You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot: 102 102 103 103 104 104 (% style="color:blue" %)**Register the device** 105 105 106 -[[image:i mage-20231207144600-2.png||height="703" width="756"]]106 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/1654935135620-998.png?rev=1.1||alt="1654935135620-998.png"]] 107 107 108 108 109 -(% style="color:blue" %)**Add DevEUI andAppKey**109 +(% style="color:blue" %)**Add APP EUI and DEV EUI** 110 110 111 -[[image:i mage-20231207145121-5.png||height="540" width="756"]]111 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-4.png?width=753&height=551&rev=1.1||alt="图片-20220611161308-4.png"]] 112 112 113 113 114 +(% style="color:blue" %)**Add APP EUI in the application** 114 114 115 -=== Step 2: Activate on DS20L === 116 116 117 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-5.png?width=742&height=601&rev=1.1||alt="图片-20220611161308-5.png"]] 118 + 119 + 120 +(% style="color:blue" %)**Add APP KEY** 121 + 122 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50v2-S31-S31B%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20User%20Manual/WebHome/image-20220611161308-6.png?width=744&height=485&rev=1.1||alt="图片-20220611161308-6.png"]] 123 + 124 + 125 +(% style="color:blue" %)**Step 2:**(%%) Activate on DS20L 126 + 117 117 [[image:image-20231128133704-1.png||height="189" width="441"]] 118 118 119 119 Press the button for 5 seconds to activate the DS20L. ... ... @@ -123,7 +123,6 @@ 123 123 After join success, it will start to upload messages to TTN and you can see the messages in the panel. 124 124 125 125 126 - 127 127 == 2.3 Uplink Payload == 128 128 129 129 === 2.3.1 Device Status, FPORT~=5 === ... ... @@ -141,7 +141,7 @@ 141 141 142 142 Example parse in TTNv3 143 143 144 -[[image: image-20231206151412-3.png||height="179" width="1070"]]153 +[[image:1701149922873-259.png]] 145 145 146 146 (% style="color:blue" %)**Sensor Model**(%%): For DS20L, this value is 0x21 147 147 ... ... @@ -197,25 +197,45 @@ 197 197 === 2.3.2 Uplink Payload, FPORT~=2 === 198 198 199 199 200 -==== (% style="color:red" %)**MOD~=1**(%%) ==== 209 +((( 210 +DS20L will send this uplink **after** Device Status once join the LoRaWAN network successfully. And DS20L will: 201 201 212 +periodically send this uplink every 20 minutes, this interval [[can be changed>>||anchor="H3.3.1SetTransmitIntervalTime"]]. 213 + 214 +Uplink Payload totals 11 bytes. 215 +))) 216 + 217 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %) 218 +|=(% style="width: 60px;background-color:#4F81BD;color:white" %)((( 219 +**Size(bytes)** 220 +)))|=(% style="width: 30px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 80px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**2**|=(% style="background-color:#4F81BD;color:white; width: 80px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 70px;" %)**1**|=(% style="background-color: #4F81BD;color:white; width: 70px;" %)**1** 221 +|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="HBatteryInfo"]]|(% style="width:62.5px" %)((( 222 +[[Temperature DS18B20>>||anchor="HDS18B20Temperaturesensor"]] 223 +)))|[[Distance>>||anchor="HDistance"]]|[[Distance signal strength>>||anchor="HDistancesignalstrength"]]|(% style="width:122px" %)((( 224 +[[Interrupt flag & Interrupt_level>>||anchor="HInterruptPin26A0InterruptLevel"]] 225 +)))|(% style="width:54px" %)[[LiDAR temp>>||anchor="HLiDARtemp"]]|(% style="width:96px" %)((( 226 +[[Message Type>>||anchor="HMessageType"]] 227 +))) 228 + 229 +==== (% style="color:red" %)**MOD~=1** ==== 230 + 202 202 Regularly detect distance and report. When the distance exceeds the limit, the alarm flag is set to 1, and the report can be triggered by external interrupts. 203 203 204 204 Uplink Payload totals 10 bytes. 205 205 206 -(% border="1" cellspacing="4" style="background-color:#f2f2f2 ; width:510px" %)207 -|(% style="background-color:#4 f81bd;; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd;; width:30px" %)**2**|(% style="background-color:#4f81bd;; width:130px" %)**1**|(% style="background-color:#4f81bd;; width:70px" %)**2**|(% style="background-color:#4f81bd;; width:100px" %)**1**|(% style="background-color:#4f81bd;; width:120px" %)**4**208 -|(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+ Alarm+Interrupt|(% style="width:74px" %)Distance|(% style="width:100px" %)Sensor State|(% style="width:119px" %)Interrupt Count 235 +(% border="1" cellspacing="4" style="width:510px;background-color:#f2f2f2" %) 236 +|(% style="width:60px;background-color:#4F81BD;color:white" %)**Size(bytes)**|(% style="width:30px;background-color:#4F81BD;color:white" %)**2**|(% style="width:130px;background-color:#4F81BD;color:white" %)**1**|(% style="width:70px;background-color:#4F81BD;color:white" %)**2**|(% style="width:100px;background-color:#4F81BD;color:white" %)**1**|(% style="width:120px;background-color:#4F81BD;color:white" %)**4** 237 +|(% style="width:91px" %)Value|(% style="width:41px" %)[[BAT>>||anchor="HBatteryInfo"]]|(% style="width:176px" %)MOD+ Alarm+Interrupt|(% style="width:74px" %)Distance|(% style="width:100px" %)Sensor State|(% style="width:119px" %)Interrupt Count 209 209 210 -[[image:image-20231206195704-6.png||height="238" width="999"]] 211 211 212 - (%style="color:blue" %)**Battery Info:**240 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png]] 213 213 242 +(% style="color:blue" %)**Battery Info** 243 + 214 214 Check the battery voltage for DS20L 215 215 216 216 Ex1: 0x0E10 = 3600mV 217 217 218 - 219 219 (% style="color:blue" %)**MOD & Alarm & Interrupt:** 220 220 221 221 (% style="color:red" %)**MOD:** ... ... @@ -233,37 +233,36 @@ 233 233 234 234 Whether it is an external interrupt. 235 235 265 +(% style="color:blue" %)**Distance info** 236 236 237 -(% style="color:blue" %)**Distance info:** 238 - 239 239 **Example**: 240 240 241 241 If payload is: 0708H: distance = 0708H = 1800 mm 242 242 271 +(% style="color:blue" %)**Sensor State** 243 243 244 -(% style="color:blue" %)**Sensor State:** 245 - 246 246 Ex1: 0x00: Normal collection distance 247 247 248 248 Ex2 0x0x: Distance collection is wrong 249 249 277 +(% style="color:blue" %)**Interript Count** 250 250 251 -(% style="color:blue" %)**Interript Count:** 252 - 253 253 If payload is:000007D0H: count = 07D0H =2000 254 254 255 255 256 256 257 -==== (% style="color:red" %)**MOD~=2**(%%)** ** ==== 258 258 284 +==== (% style="color:red" %)**MOD=2** ==== 285 + 259 259 Uninterrupted measurement. When the distance exceeds the limit, the output IO is set high and reports are reported every five minutes. The time can be set and powered by an external power supply.Uplink Payload totals 11bytes. 260 260 261 -(% border="1" cellspacing="4" style="background-color:#f2f2f2 ; width:510px" %)262 -|(% style="background-color:#4 f81bd;; width:70px" %)**Size(bytes)**|(% style="background-color:#4f81bd;; width:40px" %)**2**|(% style="background-color:#4f81bd;; width:130px" %)**1**|(% style="background-color:#4f81bd;; width:130px" %)**4**|(% style="background-color:#4f81bd;; width:70px" %)**2**|(% style="background-color:#4f81bd;; width:70px" %)**2**263 -|(% style="width:91px" %)Value|(% style="width:41px" %)BAT|(% style="width:176px" %)MOD+Alarm+Do+Limit flag|(% style="width:74px" %)Distance Limit Alarm count|(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit 288 +(% border="1" cellspacing="4" style="width:510px;background-color:#f2f2f2" %) 289 +|(% style="width:70px;background-color:#4F81BD;color:white" %)**Size(bytes)**|(% style="width:40px;background-color:#4F81BD;color:white" %)**2**|(% style="width:130px;background-color:#4F81BD;color:white" %)**1**|(% style="width:130px;background-color:#4F81BD;color:white" %)**4**|(% style="width:70px;background-color:#4F81BD;color:white" %)**2**|(% style="width:70px;background-color:#4F81BD;color:white" %)**2** 290 +|(% style="width:91px" %)Value|(% style="width:41px" %)[[BAT>>||anchor="HBatteryInfo"]]|(% style="width:176px" %)MOD+Alarm+Do+Limit flag|(% style="width:74px" %)Distance Limit Alarm count|(% style="width:100px" %)Upper limit|(% style="width:119px" %)Lower limit 264 264 265 -[[image:1701155150328-206.png]] 266 266 293 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png]] 294 + 267 267 (% style="color:blue" %)**MOD & Alarm & Do & Limit flag:** 268 268 269 269 (% style="color:red" %)**MOD:** ... ... @@ -283,19 +283,19 @@ 283 283 284 284 (% style="color:red" %)**Limit flag:** 285 285 286 -Mode for setting threshold: **0~~5**314 +Mode for setting threshold: 0~~5 287 287 288 - **0:**does not use upper and lower limits316 +0: does not use upper and lower limits 289 289 290 - **1:**Use upper and lower limits318 +1: Use upper and lower limits 291 291 292 - **2:**is less than the lower limit value320 +2: is less than the lower limit value 293 293 294 - **3:**is greater than the lower limit value322 +3: is greater than the lower limit value 295 295 296 - **4:**is less than the upper limit324 +4: is less than the upper limit 297 297 298 - **5:**is greater than the upper limit326 +5: is greater than the upper limit 299 299 300 300 301 301 (% style="color:blue" %)**Upper limit:** ... ... @@ -302,18 +302,99 @@ 302 302 303 303 The upper limit of the threshold cannot exceed 2000mm. 304 304 305 - 306 306 (% style="color:blue" %)**Lower limit:** 307 307 308 308 The lower limit of the threshold cannot be less than 3mm. 309 309 310 310 311 -== 2. 4 Decodepayloadin TheThingsNetwork==338 +=== 2.3.3 Historical measuring distance, FPORT~=3 === 312 312 313 313 341 +DS20L stores sensor values and users can retrieve these history values via the [[downlink command>>||anchor="H2.5.4Pollsensorvalue"]]. 342 + 343 +The historical payload includes one or multiplies entries and every entry has the same payload as Real-Time measuring distance. 344 + 345 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %) 346 +|=(% style="width: 60px;background-color:#4F81BD;color:white" %)((( 347 +**Size(bytes)** 348 +)))|=(% style="width: 80px;background-color:#4F81BD;color:white" %)1|=(% style="width: 80px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**2**|=(% style="background-color:#4F81BD; color: white; width: 85px;" %)**1**|=(% style="background-color: #4F81BD; color: white; width: 85px;" %)4 349 +|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)Interrupt flag & Interrupt_level|(% style="width:62.5px" %)((( 350 +Reserve(0xFF) 351 +)))|Distance|Distance signal strength|(% style="width:88px" %)((( 352 +LiDAR temp 353 +)))|(% style="width:85px" %)Unix TimeStamp 354 + 355 +**Interrupt flag & Interrupt level:** 356 + 357 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:480px" %) 358 +|=(% style="width: 60px;background-color:#4F81BD;color:white" %)((( 359 +**Size(bit)** 360 +)))|=(% style="width: 90px;background-color:#4F81BD;color:white" %)**bit7**|=(% style="width: 90px;background-color:#4F81BD;color:white" %)**bit6**|=(% style="width: 60px;background-color:#4F81BD;color:white" %)**[bit5:bit2]**|=(% style="width: 90px; background-color: #4F81BD; color: white;" %)**bit1**|=(% style="background-color: #4F81BD; color: white; width: 90px;" %)**bit0** 361 +|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)No ACK message|(% style="width:62.5px" %)Poll Message Flag|Reserve|(% style="width:91px" %)Interrupt level|(% style="width:88px" %)((( 362 +Interrupt flag 363 +))) 364 + 365 +* ((( 366 +Each data entry is 11 bytes and has the same structure as [[Uplink Payload>>||anchor="H2.3.2UplinkPayload2CFPORT3D2"]], to save airtime and battery, DS20L will send max bytes according to the current DR and Frequency bands. 367 +))) 368 + 369 +For example, in the US915 band, the max payload for different DR is: 370 + 371 +**a) DR0:** max is 11 bytes so one entry of data 372 + 373 +**b) DR1:** max is 53 bytes so devices will upload 4 entries of data (total 44 bytes) 374 + 375 +**c) DR2:** total payload includes 11 entries of data 376 + 377 +**d) DR3:** total payload includes 22 entries of data. 378 + 379 +If DS20L doesn't have any data in the polling time. It will uplink 11 bytes of 0 380 + 381 + 382 +**Downlink:** 383 + 384 +0x31 64 CC 68 0C 64 CC 69 74 05 385 + 386 +[[image:image-20230805144936-2.png||height="113" width="746"]] 387 + 388 +**Uplink:** 389 + 390 +43 FF 0E 10 00 B0 1E 64 CC 68 0C 40 FF 0D DE 00 A8 1E 64 CC 68 29 40 FF 09 92 00 D3 1E 64 CC 68 65 40 FF 02 3A 02 BC 1E 64 CC 68 A1 41 FF 0E 1A 00 A4 1E 64 CC 68 C0 40 FF 0D 2A 00 B8 1E 64 CC 68 E8 40 FF 00 C8 11 6A 1E 64 CC 69 24 40 FF 0E 24 00 AD 1E 64 CC 69 6D 391 + 392 + 393 +**Parsed Value:** 394 + 395 +[DISTANCE , DISTANCE_SIGNAL_STRENGTH,LIDAR_TEMP,EXTI_STATUS , EXTI_FLAG , TIME] 396 + 397 + 398 +[360,176,30,High,True,2023-08-04 02:53:00], 399 + 400 +[355,168,30,Low,False,2023-08-04 02:53:29], 401 + 402 +[245,211,30,Low,False,2023-08-04 02:54:29], 403 + 404 +[57,700,30,Low,False,2023-08-04 02:55:29], 405 + 406 +[361,164,30,Low,True,2023-08-04 02:56:00], 407 + 408 +[337,184,30,Low,False,2023-08-04 02:56:40], 409 + 410 +[20,4458,30,Low,False,2023-08-04 02:57:40], 411 + 412 +[362,173,30,Low,False,2023-08-04 02:58:53], 413 + 414 + 415 +**History read from serial port:** 416 + 417 +[[image:image-20230805145056-3.png]] 418 + 419 + 420 +=== 2.3.4 Decode payload in The Things Network === 421 + 422 + 314 314 While using TTN network, you can add the payload format to decode the payload. 315 315 316 -[[image:i mage-20231206143515-1.png||height="534" width="759"]]425 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LLDS12-LoRaWAN%20LiDAR%20ToF%20Distance%20Sensor%20User%20Manual/WebHome/1654592762713-715.png?rev=1.1||alt="1654592762713-715.png"]] 317 317 318 318 319 319 ((( ... ... @@ -325,7 +325,7 @@ 325 325 ))) 326 326 327 327 328 -== 2. 5Show Data in DataCake IoT Server ==437 +== 2.4 Show Data in DataCake IoT Server == 329 329 330 330 331 331 ((( ... ... @@ -357,10 +357,10 @@ 357 357 358 358 After added, the sensor data arrive TTN V3, it will also arrive and show in Datacake. 359 359 360 -[[image: image-20231129100454-2.png||height="501" width="928"]]469 +[[image:1701152946067-561.png]] 361 361 362 362 363 -== 2. 6Frequency Plans ==472 +== 2.5 Frequency Plans == 364 364 365 365 366 366 The DS20L 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. ... ... @@ -441,9 +441,6 @@ 441 441 ))) 442 442 * ((( 443 443 Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds 444 - 445 - 446 - 447 447 ))) 448 448 449 449 === 3.3.2 Set Interrupt Mode === ... ... @@ -484,9 +484,10 @@ 484 484 485 485 * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger 486 486 487 -=== 3.3.3 Set work mode === 488 488 594 +== 3.3.3 Set work mode == 489 489 596 + 490 490 Feature: Switch working mode 491 491 492 492 (% style="color:blue" %)**AT Command: AT+MOD** ... ... @@ -501,9 +501,9 @@ 501 501 502 502 (% style="color:blue" %)**Downlink Command:** 503 503 504 -* **Example: **0x0A0 1~/~/ Same as AT+MOD=1611 +* **Example: **0x0A00 ~/~/ Same as AT+MOD=0 505 505 506 -* **Example:** 0x0A0 2~/~/ Same as AT+MOD=2613 +* **Example:** 0x0A01 ~/~/ Same as AT+MOD=1 507 507 508 508 === 3.3.4 Set threshold and threshold mode === 509 509 ... ... @@ -522,29 +522,10 @@ 522 522 ))) 523 523 |(% style="width:172px" %)AT+ DOL =1,1800,100,0,400|(% style="width:279px" %)Set only the upper and lower thresholds|(% style="width:118px" %)OK 524 524 525 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %) 526 -|(% rowspan="11" style="color:blue; width:120px" %)((( 527 - 528 528 529 529 530 - 531 - 532 - 533 - 534 - 535 - 536 - 537 - 538 -**AT+DOL=5,1800,0,0,400** 539 -)))|(% rowspan="6" style="width:240px" %)((( 540 - 541 - 542 - 543 - 544 - 545 - 546 -The first bit sets the limit mode 547 -)))|(% style="width:150px" %)0: Do not use upper and lower limits 634 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %) 635 +|(% rowspan="11" style="color:blue; width:120px" %)**AT+DOL=5,1800,0,0,400**|(% rowspan="6" style="width:240px" %)The first bit sets the limit mode|(% style="width:150px" %)0: Do not use upper and lower limits 548 548 |(% style="width:251px" %)1: Use upper and lower limits 549 549 |(% style="width:251px" %)2: Less than the lower limit 550 550 |(% style="width:251px" %)3: Greater than the lower limit ... ... @@ -562,22 +562,14 @@ 562 562 563 563 (% style="color:blue" %)**Downlink Command: 0x07** 564 564 565 -Format: Command Code (0x07) followed by 9 653 +Format: Command Code (0x07) followed by 9bytes. 566 566 567 - Ifthedownlinkpayload=**0710708006400190**, it means set the END Node's limit mode to0x01,upper limit value to0x0708=1800(mm),lowerlimitvalueto0x0064=100(mm),to over-limit alarm(0x00),the sampling time to0x0190=400(ms), while type code is 0x07.655 +* Example 0: Downlink Payload: 070000000000000190 **~-~-->** AT+MOD=0,0,0,0,400 568 568 569 -* Example 0: Downlink Payload: 07 00 0000 0000 00 0190 **~-~-->** AT+MOD=0,0,0,0,400 570 - 571 571 * Example 1: Downlink Payload: 070107080064000190 **~-~-->** AT+MOD=1,1800,100,0,400 572 572 573 -* Example 2: Downlink Payload: 070200000064000190 **~-~-->** AT+MOD=2,0,100,0,400 574 574 575 -* Example 3: Downlink Payload: 070300000064000190 **~-~-->** AT+MOD=3,1800,100,0,400 576 576 577 -* Example 4: Downlink Payload: 070407080000000190 **~-~-->** AT+MOD=4,0,100,0,400 578 - 579 -* Example 5: Downlink Payload: 070507080000000190 **~-~-->** AT+MOD=5,1800,100,0,400 580 - 581 581 = 4. Battery & Power Consumption = 582 582 583 583 ... ... @@ -614,33 +614,6 @@ 614 614 DS20L 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"]] 615 615 616 616 617 -== 6.2 DS20L programming line == 618 - 619 - 620 -缺图 后续补上 621 - 622 -feature: 623 - 624 -for AT commands 625 - 626 -Update the firmware of DS20L 627 - 628 -Support interrupt mode 629 - 630 - 631 -== 6.3 LiDAR probe position == 632 - 633 - 634 -[[image:1701155390576-216.png||height="285" width="307"]] 635 - 636 -The black oval hole in the picture is the LiDAR probe. 637 - 638 - 639 -== 6.4 Interface definition == 640 - 641 -[[image:image-20231128151132-2.png||height="305" width="557"]] 642 - 643 - 644 644 = 7. Trouble Shooting = 645 645 646 646 == 7.1 AT Command input doesn't work ==
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