Changes for page SDI-12-LB/LS -- SDI-12 to LoRaWAN Converter User Manual
Last modified by Xiaoling on 2025/04/25 08:58
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... ... @@ -3,7 +3,6 @@ 3 3 4 4 **Table of Contents:** 5 5 6 -{{toc/}} 7 7 8 8 9 9 ... ... @@ -17,23 +17,22 @@ 17 17 18 18 19 19 20 - 21 21 = 1. Introduction = 22 22 23 23 == 1.1 What is SDI-12 to LoRaWAN Converter == 24 24 25 25 26 -The Dragino ** (% style="color:blue" %)SDI-12-LB**(%%)is a **(% style="color:blue" %)SDI-12 to LoRaWAN Converter **(%%)designed for Smart Agriculture solution.24 +The Dragino **SDI-12-LB** is a **SDI-12 to LoRaWAN Converter **designed for Smart Agriculture solution. 27 27 28 28 SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous [[serial communications>>url:https://en.wikipedia.org/wiki/Serial_communication]] protocol for intelligent sensors that monitor environment data. SDI-12 protocol is widely used in Agriculture sensor and Weather Station sensors. 29 29 30 -SDI-12-LB has SDI-12 interface and support 12v output to power external SDI-12 sensor. It can get the environment data from SDI-12 sensor and sends out the data via LoRaWAN wireless protocol. 28 +**SDI-12-LB** has SDI-12 interface and support 12v output to power external SDI-12 sensor. It can get the environment data from SDI-12 sensor and sends out the data via LoRaWAN wireless protocol. 31 31 32 -The LoRa wireless technology used in SDI-12-LB 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. 30 +The LoRa wireless technology used in **SDI-12-LB** 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. 33 33 34 -SDI-12-LB is powered by ** (% style="color:blue" %)8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.32 +**SDI-12-LB** is powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use up to 5 years. 35 35 36 -Each SDI-12-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on. 34 +Each **SDI-12-LB** is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on. 37 37 38 38 39 39 [[image:image-20230201084414-1.png||height="464" width="1108"]] ... ... @@ -41,6 +41,8 @@ 41 41 42 42 43 43 42 + 43 + 44 44 == 1.2 Features == 45 45 46 46 ... ... @@ -56,22 +56,21 @@ 56 56 * Downlink to change configure 57 57 * 8500mAh Battery for long term use 58 58 59 - 60 60 == 1.3 Specification == 61 61 62 62 63 -** (% style="color:#037691" %)Micro Controller:**62 +**Micro Controller:** 64 64 65 65 * MCU: 48Mhz ARM 66 66 * Flash: 256KB 67 67 * RAM: 64KB 68 68 69 -** (% style="color:#037691" %)Common DC Characteristics:**68 +**Common DC Characteristics:** 70 70 71 71 * Supply Voltage: 2.5v ~~ 3.6v 72 72 * Operating Temperature: -40 ~~ 85°C 73 73 74 -** (% style="color:#037691" %)LoRa Spec:**73 +**LoRa Spec:** 75 75 76 76 * Frequency Range, Band 1 (HF): 862 ~~ 1020 Mhz 77 77 * Max +22 dBm constant RF output vs. ... ... @@ -78,19 +78,19 @@ 78 78 * RX sensitivity: down to -139 dBm. 79 79 * Excellent blocking immunity 80 80 81 -** (% style="color:#037691" %)Current Input Measuring :**80 +**Current Input Measuring :** 82 82 83 83 * Range: 0 ~~ 20mA 84 84 * Accuracy: 0.02mA 85 85 * Resolution: 0.001mA 86 86 87 -** (% style="color:#037691" %)Voltage Input Measuring:**86 +**Voltage Input Measuring:** 88 88 89 89 * Range: 0 ~~ 30v 90 90 * Accuracy: 0.02v 91 91 * Resolution: 0.001v 92 92 93 -** (% style="color:#037691" %)Battery:**92 +**Battery:** 94 94 95 95 * Li/SOCI2 un-chargeable battery 96 96 * Capacity: 8500mAh ... ... @@ -98,12 +98,11 @@ 98 98 * Max continuously current: 130mA 99 99 * Max boost current: 2A, 1 second 100 100 101 -** (% style="color:#037691" %)Power Consumption**100 +**Power Consumption** 102 102 103 103 * Sleep Mode: 5uA @ 3.3v 104 104 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm 105 105 106 - 107 107 == 1.4 Connect to SDI-12 Sensor == 108 108 109 109 ... ... @@ -114,9 +114,9 @@ 114 114 == 1.5 Sleep mode and working mode == 115 115 116 116 117 -** (% style="color:blue" %)Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.115 +**Deep Sleep Mode: **Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life. 118 118 119 -** (% style="color:blue" %)Working Mode: **(%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.117 +**Working Mode: **In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode. 120 120 121 121 122 122 == 1.6 Button & LEDs == ... ... @@ -139,7 +139,6 @@ 139 139 ))) 140 140 |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means PS-LB is in Deep Sleep Mode. 141 141 142 - 143 143 == 1.7 Pin Mapping == 144 144 145 145 ... ... @@ -163,6 +163,9 @@ 163 163 == 1.9 Mechanical == 164 164 165 165 163 + 164 + 165 + 166 166 [[image:image-20230201090139-2.png]] 167 167 168 168 [[image:image-20230201090139-3.png]] ... ... @@ -175,7 +175,7 @@ 175 175 == 2.1 How it works == 176 176 177 177 178 -The SDI-12-LB is configured as ** (% style="color:#037691" %)LoRaWAN OTAA Class A**(%%)mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and activate the SDI-12-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.178 +The SDI-12-LB is configured as **LoRaWAN OTAA Class A** mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and activate the SDI-12-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes. 179 179 180 180 181 181 == 2.2 Quick guide to connect to LoRaWAN server (OTAA) == ... ... @@ -190,7 +190,7 @@ 190 190 The LPS8V2 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. 191 191 192 192 193 -** (% style="color:blue" %)Step 1**(%%): Create a device in TTN with the OTAA keys from SDI-12-LB.193 +**Step 1**: Create a device in TTN with the OTAA keys from SDI-12-LB. 194 194 195 195 Each SDI-12-LB is shipped with a sticker with the default device EUI as below: 196 196 ... ... @@ -204,35 +204,35 @@ 204 204 You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot: 205 205 206 206 207 -** (% style="color:blue" %)Register the device**207 +**Register the device** 208 208 209 209 [[image:1675213652444-622.png]] 210 210 211 211 212 -** (% style="color:blue" %)Add APP EUI and DEV EUI**212 +**Add APP EUI and DEV EUI** 213 213 214 214 215 215 [[image:1675213661769-223.png]] 216 216 217 217 218 -** (% style="color:blue" %)Add APP EUI in the application**218 +**Add APP EUI in the application** 219 219 220 220 221 221 [[image:1675213675852-577.png]] 222 222 223 223 224 -** (% style="color:blue" %)Add APP KEY**224 +**Add APP KEY** 225 225 226 226 [[image:1675213686734-883.png]] 227 227 228 228 229 -** (% style="color:blue" %)Step 2**(%%): Activate on SDI-12-LB229 +**Step 2**: Activate on SDI-12-LB 230 230 231 231 232 232 Press the button for 5 seconds to activate the SDI-12-LB. 233 233 234 234 235 -** (% style="color:green" %)Green led**(%%)will fast blink 5 times, device will enter **(% style="color:blue" %)OTA mode**(%%)for 3 seconds. And then start to JOIN LoRaWAN network. **(% style="color:green" %)Green led**(%%)will solidly turn on for 5 seconds after joined in network.235 +**Green led** will fast blink 5 times, device will enter **OTA mode** for 3 seconds. And then start to JOIN LoRaWAN network. **Green led** will solidly turn on for 5 seconds after joined in network. 236 236 237 237 238 238 [[image:1675213704414-644.png]] ... ... @@ -261,15 +261,15 @@ 261 261 [[image:image-20230201091027-7.png||height="261" width="1179"]] 262 262 263 263 264 -==== ** (% style="color:blue" %)al! ~-~- Get SDI-12 sensor Identification** ====264 +==== **al! ~-~- Get SDI-12 sensor Identification** ==== 265 265 266 266 267 267 * AT Command: AT+ADDRI=aa 268 268 * LoRaWAN Downlink(prefix 0xAA00): AA 00 aa 269 269 270 -** (% style="color:#037691" %)Parameter: **(%%)aa: ASCII value of SDI-12 sensor address in downlink or HEX value in AT Command)270 +**Parameter: **aa: ASCII value of SDI-12 sensor address in downlink or HEX value in AT Command) 271 271 272 -** (% style="color:blue" %)Example : **AT+ADDRI=0 ( Equal to downlink: 0x AA 00 30)272 +**Example : **AT+ADDRI=0 ( Equal to downlink: 0x AA 00 30) 273 273 274 274 275 275 The following is the display information on the serial port and the server. ... ... @@ -281,31 +281,30 @@ 281 281 [[image:image-20230201091257-9.png||height="225" width="1242"]] 282 282 283 283 284 -==== ** (% style="color:blue" %)aM!,aMC!, aM1!- aM9!, aMC1!- aMC9!** ====284 +==== **aM!,aMC!, aM1!- aM9!, aMC1!- aMC9!** ==== 285 285 286 286 287 -** (% style="color:red" %)aM! **(%%): Start Non-Concurrent Measurement287 +**aM! **: Start Non-Concurrent Measurement 288 288 289 -** (% style="color:red" %)aMC! **(%%): Start Non-Concurrent Measurement – Request CRC289 +**aMC! **: Start Non-Concurrent Measurement – Request CRC 290 290 291 -** (% style="color:red" %)aM1!- aM9! **(%%): Additional Measurements291 +**aM1!- aM9! **: Additional Measurements 292 292 293 -** (% style="color:red" %)aMC1!- aMC9!**(%%): Additional Measurements – Request CRC293 +**aMC1!- aMC9!** : Additional Measurements – Request CRC 294 294 295 295 296 296 * AT Command : AT+ADDRM=0,1,0,1 297 - 298 298 * LoRaWAN Downlink(prefix 0xAA01): 0xAA 01 30 01 00 01 299 299 300 300 Downlink:AA 01 aa bb cc dd 301 301 302 -** (% style="color:#037691" %)aa**(%%): SDI-12 sensor address.301 +**aa**: SDI-12 sensor address. 303 303 304 -** (% style="color:#037691" %)bb**(%%): 0: no CRC, 1: request CRC303 +**bb**: 0: no CRC, 1: request CRC 305 305 306 -** (% style="color:#037691" %)cc**(%%): 1-9: Additional Measurement, 0: no additional measurement305 +**cc**: 1-9: Additional Measurement, 0: no additional measurement 307 307 308 -** (% style="color:#037691" %)dd**(%%): delay (in second) to send **(% style="color:#037691" %)aD0!**(%%)to get return.307 +**dd**: delay (in second) to send **aD0!** to get return. 309 309 310 310 311 311 The following is the display information on the serial port and the server. ... ... @@ -318,16 +318,16 @@ 318 318 319 319 320 320 321 -==== ** (% style="color:blue" %)aC!, aCC!, aC1!- aC9!, aCC1!- aCC9! ** ====320 +==== **aC!, aCC!, aC1!- aC9!, aCC1!- aCC9! ** ==== 322 322 323 323 324 -** (% style="color:red" %)aC!**(%%): Start Concurrent Measurement323 +**aC!** : Start Concurrent Measurement 325 325 326 -** (% style="color:red" %)aCC!**(%%): Start Concurrent Measurement – Request CRC325 +**aCC!** : Start Concurrent Measurement – Request CRC 327 327 328 -** (% style="color:red" %)aC1!- aC9!**(%%): Start Additional Concurrent Measurements327 +**aC1!- aC9!** : Start Additional Concurrent Measurements 329 329 330 -** (% style="color:red" %)aCC1!- aCC9!**(%%): Start Additional Concurrent Measurements – Request CRC329 +**aCC1!- aCC9!** : Start Additional Concurrent Measurements – Request CRC 331 331 332 332 333 333 * AT Command : AT+ADDRC=0,1,0,1 ... ... @@ -336,13 +336,13 @@ 336 336 337 337 Downlink: AA 02 aa bb cc dd 338 338 339 -** (% style="color:#037691" %)aa**(%%): SDI-12 sensor address.338 +**aa**: SDI-12 sensor address. 340 340 341 -** (% style="color:#037691" %)bb**(%%): 0: no CRC, 1: request CRC340 +**bb**: 0: no CRC, 1: request CRC 342 342 343 -** (% style="color:#037691" %)cc**(%%): 1-9: Additional Measurement, 0: no additional measurement342 +**cc**: 1-9: Additional Measurement, 0: no additional measurement 344 344 345 -** (% style="color:#037691" %)dd**(%%): delay (in second) to send **(% style="color:#037691" %)aD0!**(%%)to get return.344 +**dd**: delay (in second) to send **aD0!** to get return. 346 346 347 347 348 348 The following is the display information on the serial port and the server. ... ... @@ -354,11 +354,11 @@ 354 354 [[image:image-20230201091954-13.png||height="203" width="1117"]] 355 355 356 356 356 +(% style="display:none" %) (%%) 357 357 358 +==== **aR0!- aR9!, aRC0!- aRC9!** ==== 358 358 359 -==== **(% style="color:blue" %)aR0!- aR9!, aRC0!- aRC9!** ==== 360 360 361 - 362 362 Start Continuous Measurement 363 363 364 364 Start Continuous Measurement – Request CRC ... ... @@ -369,13 +369,13 @@ 369 369 370 370 Downlink: AA 03 aa bb cc dd 371 371 372 -** (% style="color:#037691" %)aa**(%%): SDI-12 sensor address.371 +**aa**: SDI-12 sensor address. 373 373 374 -** (% style="color:#037691" %)bb**(%%): 0: no CRC, 1: request CRC373 +**bb**: 0: no CRC, 1: request CRC 375 375 376 -** (% style="color:#037691" %)cc**(%%): 1-9: Additional Measurement, 0: no additional measurement375 +**cc**: 1-9: Additional Measurement, 0: no additional measurement 377 377 378 -** (% style="color:#037691" %)dd**(%%): delay (in second) to send **(% style="color:#037691" %)aD0!**(%%)to get return.377 +**dd**: delay (in second) to send **aD0!** to get return. 379 379 380 380 381 381 The following is the display information on the serial port and the server. ... ... @@ -396,20 +396,20 @@ 396 396 397 397 LoRaWAN Downlink: A8 aa xx xx xx xx bb cc 398 398 399 -** (% style="color:#037691" %)aa **(%%): total SDI-12 command length398 +**aa **: total SDI-12 command length 400 400 401 -** (% style="color:#037691" %)xx **(%%): SDI-12 command400 +**xx **: SDI-12 command 402 402 403 -** (% style="color:#037691" %)bb **(%%): Delay to wait for return402 +**bb **: Delay to wait for return 404 404 405 -** (% style="color:#037691" %)cc**(%%): 0: don't uplink return to LoRaWAN, 1: Uplink return to LoRaWAN on FPORT=100404 +**cc **: 0: don't uplink return to LoRaWAN, 1: Uplink return to LoRaWAN on FPORT=100 406 406 407 407 408 -** (% style="color:blue" %)Example: **(%%)AT+CFGDEV =0RC0!,1407 +**Example: **AT+CFGDEV =0RC0!,1 409 409 410 -** (% style="color:#037691" %)0RC0! **(%%): SDI-12 Command,409 +**0RC0! **: SDI-12 Command, 411 411 412 -** (% style="color:#037691"%)1**(%%): Delay 1 second. ( 0: 810 mini-second)411 +**1 **: Delay 1 second. ( 0: 810 mini-second) 413 413 414 414 Equal Downlink: 0xA8 05 30 52 43 30 21 01 01 415 415 ... ... @@ -431,7 +431,7 @@ 431 431 AT+CONVFORM ( Max length: 80 bytes) 432 432 433 433 434 -** (% style="color:blue" %)Example:**433 +**Example:** 435 435 436 436 1) AT+CONVFORM=0, string Convert String from String to ASCII 437 437 ... ... @@ -451,31 +451,31 @@ 451 451 User can define max 15 SDI-12 Commands (AT+COMMAND1 ~~ AT+COMMANDF). On each uplink period (TDC time, default 20 minutes), SDI-12-LB will send these SDI-12 commands and wait for return from SDI-12 sensors. SDI-12-LB will then combine these returns and uplink via LoRaWAN. 452 452 453 453 454 -* ** (% style="color:blue" %)AT Command:**453 +* ** AT Command:** 455 455 456 -** (% style="color:#037691" %)AT+COMMANDx=var1,var2,var3,var4.**455 +**AT+COMMANDx=var1,var2,var3,var4.** 457 457 458 -** (% style="color:red" %)var1**(%%): SDI-12 command , for example: 0RC0!457 +**var1**: SDI-12 command , for example: 0RC0! 459 459 460 -** (% style="color:red" %)var2**(%%): Wait timeout for return. (unit: second)459 +**var2**: Wait timeout for return. (unit: second) 461 461 462 -** (% style="color:red" %)var3**(%%): Whether to send //addrD0!// to get return after var2 timeout. 0: Don't Send //addrD0! //; 1: Send //addrD0!//.461 +**var3**: Whether to send //addrD0!// to get return after var2 timeout. 0: Don't Send //addrD0! //; 1: Send //addrD0!//. 463 463 464 -** (% style="color:red" %)var4**(%%): validation check for return. If return invalid, SDI-12-LB will resend this command. Max 2 retries.463 +**var4**: validation check for return. If return invalid, SDI-12-LB will resend this command. Max 2 retries. 465 465 466 -** (% style="color:red" %)0 **(%%)No validation check;465 +**0 ** No validation check; 467 467 468 -** (% style="color:red" %)1**(%%)Check if return chars are printable char(0x20 ~~ 0x7E);467 +**1** Check if return chars are printable char(0x20 ~~ 0x7E); 469 469 470 -** (% style="color:#red" %)2**(%%)Check if there is return from SDI-12 sensor469 +**2** Check if there is return from SDI-12 sensor 471 471 472 -** (% style="color:red" %)3**(%%)Check if return pass CRC check ( SDI-12 command var1 must include CRC request);471 +**3** Check if return pass CRC check ( SDI-12 command var1 must include CRC request); 473 473 474 474 475 -Each AT+COMMANDx is followed by a ** (% style="color:blue" %)AT+DATACUT**(%%)command. AT+DATACUT command is used to take the useful string from the SDI-12 sensor so the final payload will have the minimum length to uplink.474 +Each AT+COMMANDx is followed by a **AT+DATACUT** command. AT+DATACUT command is used to take the useful string from the SDI-12 sensor so the final payload will have the minimum length to uplink. 476 476 477 477 478 -** (% style="color:blue" %)AT+DATACUTx**(%%): This command defines how to handle the return from AT+COMMANDx, max return length is 100 bytes.477 +**AT+DATACUTx** : This command defines how to handle the return from AT+COMMANDx, max return length is 100 bytes. 479 479 480 480 (% border="1" style="background-color:#f7faff; width:436px" %) 481 481 |(% style="width:433px" %)((( ... ... @@ -483,7 +483,7 @@ 483 483 484 484 **a**: length for the return of AT+COMMAND 485 485 486 -**b**: 485 +**b**: 1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections. 487 487 488 488 **c**: define the position for valid value. 489 489 ))) ... ... @@ -497,49 +497,49 @@ 497 497 |(% style="width:170px" %)34,2,1~~8+12~~16|(% style="width:338px" %)0D 00 01 30 31 33 4D 45 54 45 52 54 45 52 31 32 498 498 |(% style="width:170px" %)34,2,1~~34|(% style="width:338px" %)0D 00 01 30 31 33 4D 45 54 45 52 20 20 20 54 45 52 31 32 20 31 31 32 54 31 32 2D 30 30 30 32 34 38 39 35 0D 0A 499 499 500 -* ** (%style="color:blue" %)Downlink Payload:**499 +* ** Downlink Payload:** 501 501 502 -** (% style="color:blue" %)0xAF**(%%)downlink command can be used to set AT+COMMANDx or AT+DATACUTx.501 +**0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx. 503 503 504 504 505 -** (% style="color:red" %)Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**504 +**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.** 506 506 507 507 508 -Format: ** (% style="color:#037691" %)AF MM NN LL XX XX XX XX YY**507 +Format: ** AF MM NN LL XX XX XX XX YY** 509 509 510 510 Where: 511 511 512 -* ** (% style="color:#037691" %)MM **(%%): the AT+COMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,513 -* ** (% style="color:#037691" %)NN **(%%): 1: set the AT+DATACUT value ; 2: set the AT+DATACUT value.514 -* ** (% style="color:#037691" %)LL **(%%): The length of AT+COMMAND or AT+DATACUT command515 -* ** (% style="color:#037691" %)XX XX XX XX **(%%): AT+COMMAND or AT+DATACUT command516 -* ** (% style="color:#037691" %)YY **(%%): If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.511 +* **MM **: the AT+COMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F, 512 +* **NN **: 1: set the AT+DATACUT value ; 2: set the AT+DATACUT value. 513 +* **LL **: The length of AT+COMMAND or AT+DATACUT command 514 +* **XX XX XX XX **: AT+COMMAND or AT+DATACUT command 515 +* **YY **: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command. 517 517 518 -** (% style="color:blue" %)Example:**517 +**Example:** 519 519 520 520 [[image:image-20230201094129-18.png]] 521 521 522 522 523 -** (% style="color:blue" %)Clear SDI12 Command**522 +**Clear SDI12 Command** 524 524 525 525 The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them. 526 526 527 527 528 -* ** (% style="color:#037691" %)AT Command:**527 +* ** AT Command:** 529 529 530 -** (%style="color:#4F81BD" %)AT+CMDEAR=mm,nn**(%%)mm: start position of erase ,nn: stop position of erase529 +**~ AT+CMDEAR=mm,nn** mm: start position of erase ,nn: stop position of erase 531 531 532 532 533 533 Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10 534 534 535 535 536 -* ** (%style="color:#037691" %)Downlink Payload:**535 +* ** Downlink Payload:** 537 537 538 -** (%style="color:#4F81BD" %)0x09 aa bb**(%%)same as AT+CMDEAR=aa,bb537 +**~ 0x09 aa bb** same as AT+CMDEAR=aa,bb 539 539 540 540 541 541 542 -** (% style="color:blue" %)command combination**541 +**command combination** 543 543 544 544 Below shows a screen shot how the results combines together to a uplink payload. 545 545