<
From version < 100.1 >
edited by Bei Jinggeng
on 2024/02/20 16:31
To version < 99.22 >
edited by Xiaoling
on 2023/05/31 11:49
>
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Bei
1 +XWiki.Xiaoling
Content
... ... @@ -5,10 +5,6 @@
5 5  
6 6  
7 7  
8 -
9 -
10 -
11 -
12 12  **Table of Contents:**
13 13  
14 14  {{toc/}}
... ... @@ -24,11 +24,11 @@
24 24  
25 25  
26 26  (((
27 -The Dragino LSPH01 is a (% style="color:blue" %)**LoRaWAN Soil pH Sensor**(%%) for IoT of Agriculture. It is designed to measure the (% style="color:blue" %)**soil PH and soil temperature**(%%), so to send to the platform to analyze the soil acid or alkali level. The probe is IP68 waterproof.
23 +The Dragino LSPH01 is a (% style="color:blue" %)**LoRaWAN 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.
28 28  )))
29 29  
30 30  (((
31 -LSPH01 probe is made by Solid AgCl reference electrode and Pure metal pH sensitive electrode. It can detect (% style="color:blue" %)**soil's pH **(%%)with high accuracy and stable value. The LSPH01 probe can be buried into soil for long time use.
27 +LSPH01 probe is made by Solid AgCl reference electrode and Pure metal pH sensitive electrode. It can detect (% style="color:blue" %)**soil's pH (%%)**with high accuracy and stable value. The LSPH01 probe can be buried into soil for long time use.
32 32  )))
33 33  
34 34  (((
... ... @@ -64,6 +64,7 @@
64 64  * IP68 rate for the Sensor Probe
65 65  * 8500mAh Battery for long term use
66 66  
63 +
67 67  == 1.3 Probe Specification ==
68 68  
69 69  
... ... @@ -84,11 +84,13 @@
84 84  * IP68 Protection
85 85  * Length: 3.5 meters
86 86  
84 +
87 87  == 1.4 ​Applications ==
88 88  
89 89  
90 90  * Smart Agriculture
91 91  
90 +
92 92  == 1.5 Pin mapping and power on ==
93 93  
94 94  
... ... @@ -199,11 +199,11 @@
199 199  Normal uplink payload:
200 200  )))
201 201  
202 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:470px" %)
203 -|=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
201 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:470px" %)
202 +|=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
204 204  **Size(bytes)**
205 -)))|=(% style="width: 30px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 60px;background-color:#4F81BD;color:white" %)**2**|=(% style="width: 70px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 80px;background-color:#4F81BD;color:white" %)**1**
206 -|(% style="width:62.5px" %)Value|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1BatteryInfo"]]|(% style="width:62.5px" %)(((
204 +)))|=(% style="width: 30px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 70px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 80px;background-color:#D9E2F3;color:#0070C0" %)**1**
205 +|(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1BatteryInfo"]]|(% style="width:62.5px" %)(((
207 207  [[Temperature (Optional)>>||anchor="H2.3.2DS18B20Temperaturesensor"]]
208 208  )))|[[Soil pH>>||anchor="H2.3.3SoilpH"]]|[[Soil Temperature>>||anchor="H2.3.4SoilTemperature"]]|(((
209 209  [[Digital Interrupt (Optional)>>||anchor="H2.3.5InterruptPin"]]
... ... @@ -285,12 +285,13 @@
285 285  )))
286 286  
287 287  
288 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:496px" %)
289 -|=(% style="width: 160px;background-color:#4F81BD;color:white" %)**Message Type Code**|=(% style="width: 163px;background-color:#4F81BD;color:white" %)**Description**|=(% style="width: 173px;background-color:#4F81BD;color:white" %)**Payload**
287 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:496px" %)
288 +|=(% style="width: 160px;background-color:#D9E2F3;color:#0070C0" %)**Message Type Code**|=(% style="width: 163px;background-color:#D9E2F3;color:#0070C0" %)**Description**|=(% style="width: 173px;background-color:#D9E2F3;color:#0070C0" %)**Payload**
290 290  |(% style="width:160px" %)0x01|(% style="width:163px" %)Normal Uplink|(% style="width:173px" %)[[Normal Uplink Payload>>||anchor="H2.3200BUplinkPayload"]]
291 291  |(% style="width:160px" %)0x02|(% style="width:163px" %)Reply configures info|(% style="width:173px" %)[[Configure Info Payload>>||anchor="H3.4GetFirmwareVersionInfo"]]
292 292  |(% style="width:160px" %)0x03|(% style="width:163px" %)Reply Calibration Info|(% style="width:173px" %)[[Calibration Payload>>||anchor="H2.7Calibration"]]
293 293  
293 +
294 294  === 2.3.7 Decode payload in The Things Network ===
295 295  
296 296  
... ... @@ -382,8 +382,10 @@
382 382  
383 383  
384 384  (((
385 +(((
385 385  If the LSPH01 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. 
386 386  )))
388 +)))
387 387  
388 388  
389 389  === 2.6.2 Measurement ===
... ... @@ -390,11 +390,13 @@
390 390  
391 391  
392 392  (((
393 -(% style="color:blue" %)**Measurement the soil surface:**
395 +(% style="color:#4f81bd" %)**Measurement the soil surface:**
394 394  )))
395 395  
396 396  (((
397 397  [[image:1654592946732-634.png]]
400 +
401 +
398 398  )))
399 399  
400 400  (((
... ... @@ -418,7 +418,7 @@
418 418  )))
419 419  
420 420  (((
421 -(% style="color:blue" %)**Measurement inside soil:**
425 +(% style="color:#4f81bd" %)**Measurement inside soil:**
422 422  )))
423 423  
424 424  (((
... ... @@ -433,28 +433,24 @@
433 433  === 2.6.3 Maintain Probe ===
434 434  
435 435  
436 -(((
437 -~1. pH probe electrode is fragile and no strong. User must avoid strong force or hitting it.
440 +1. (((
441 +pH probe electrode is fragile and no strong. User must avoid strong force or hitting it.
438 438  )))
439 -
440 -(((
441 -2. After long time use (3~~ 6  months). The probe electrode needs to be clean; user can use high grade sandpaper to polish it or put in 5% hydrochloric acid for several minutes. After the metal probe looks like new, user can use pure water to wash it.
443 +1. (((
444 +After long time use (3~~ 6  months). The probe electrode needs to be clean; user can use high grade sandpaper to polish it or put in 5% hydrochloric acid for several minutes. After the metal probe looks like new, user can use pure water to wash it.
442 442  )))
443 -
444 -(((
445 -3. Probe reference electrode is also no strong, need to avoid strong force or hitting.
446 +1. (((
447 +Probe reference electrode is also no strong, need to avoid strong force or hitting.
446 446  )))
447 -
448 -(((
449 -4. User should keep reference electrode wet while not use.
449 +1. (((
450 +User should keep reference electrode wet while not use.
450 450  )))
451 -
452 -(((
453 -5. Avoid the probes to touch oily matter. Which will cause issue in accuracy.
452 +1. (((
453 +Avoid the probes to touch oily matter. Which will cause issue in accuracy.
454 454  )))
455 +1. (((
456 +The probe is IP68 can be put in water.
455 455  
456 -(((
457 -6. The probe is IP68 can be put in water.
458 458  
459 459  
460 460  )))
... ... @@ -462,26 +462,15 @@
462 462  == 2.7 Calibration ==
463 463  
464 464  
465 -(% style="color:blue" %)**Step1 :**(%%)** Clean probe**
466 -
467 -user can use high grade sandpaper to polish it or put in 5% hydrochloric acid for several minutes. After the metal probe looks new, users can clean it to remove hydrochloric acid or other liquids from the surface.
468 -
469 -(% style="color:blue" %)**Step2 :**(%%)** Immerse the sensor in ph buffer solution to make the sensor values stable**
470 -
471 471  (((
472 472  User can do calibration for the probe. It is limited to use below pH buffer solution to calibrate: 4.00, 6.86, 9.18. When calibration, user need to clean the electrode and put the probe in the pH buffer solution to wait the value stable ( a new clean electrode might need max 24 hours to be stable).
473 -
474 -(% style="color:red" %)**Note:Only one ph buffer with one of the ph values needs to be calibrated during calibration. Wait for the sensor measurement value to be stable, it does not need to be the same as the ph marked by the ph buffer**
475 -
476 -
477 -(% style="color:blue" %)**Step3 :**(%%)** The numerically stable sensors were calibrated using commands**
478 478  )))
479 479  
480 480  (((
481 - User can use below command to calibrate.
470 +After stable, user can use below command to calibrate.
482 482  
483 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
484 -|(% style="background-color:#4f81bd; color:white; width:120px" %)**pH buffer solution**|(% style="background-color:#4f81bd; color:white; width:150px" %)**AT Command to calibrate**|(% style="background-color:#4f81bd; color:white; width:150px" %)**Downlink Command**|(% style="background-color:#4f81bd; color:white; width:100px" %)**Read Cal Value**
472 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:520px" %)
473 +|(% style="background-color:#d9e2f3; color:#0070c0; width:120px" %)**pH buffer solution**|(% style="background-color:#d9e2f3; color:#0070c0; width:150px" %)**AT Command to calibrate**|(% style="background-color:#d9e2f3; color:#0070c0; width:150px" %)**Downlink Command**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**Read Cal Value**
485 485  |(% style="width:149px" %)4.00|(% style="width:197px" %)AT+PHCAL=4|(% style="width:206px" %)(((
486 486  0x13 04
487 487  Reply with Calibrate payload
... ... @@ -506,25 +506,13 @@
506 506  )))
507 507  )))
508 508  
509 -To use the AT COMMAND, refer to this link:
510 510  
511 -* AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
512 -
513 -* AT Command via UART Connection : See [[UART Connection>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
514 -
515 -To use Downlink, take TTN as an example, please refer to this link:
516 -
517 -* LoRaWAN Downlink.  Instruction for different platforms: See [[IoT LoRaWAN Server>>url:http://wiki.dragino.com/xwiki/bin/view/Main/]] section.
518 -
519 -When the command is successfully used, the node sends a uplink.
520 -This is the payload for uplink
521 -
522 522  (% style="color:#037691" %)**Calibration Payload**
523 523  
524 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
525 -|=(% style="width: 60px;background-color:#4F81BD;color:white" %)(((
501 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %)
502 +|=(% style="width: 60px;background-color:#D9E2F3;color:#0070C0" %)(((
526 526  **Size(bytes)**
527 -)))|=(% style="width: 100px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 100px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 100px;background-color:#4F81BD;color:white" %)**1**|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**7**|=(% style="width: 90px;background-color:#4F81BD;color:white" %)**1**
504 +)))|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**7**|=(% style="width: 90px;background-color:#D9E2F3;color:#0070C0" %)**1**
528 528  |Value|(((
529 529  PH4 Calibrate value
530 530  )))|PH6.86 Calibrate value|(((
... ... @@ -537,19 +537,13 @@
537 537  User can also send 0x14 downlink command to poll the current calibration payload.
538 538  
539 539  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:480px" %)
540 -|=(% style="width: 183px; background-color:#4F81BD;color:white" %)**Downlink Control Type**|=(% style="width: 55px; background-color:#4F81BD;color:white" %)FPort|=(% style="width: 93px; background-color:#4F81BD;color:white" %)**Type Code**|=(% style="width: 146px; background-color:#4F81BD;color:white" %)**Downlink payload size(bytes)**
517 +|=(% style="width: 183px; background-color:#D9E2F3;color:#0070C0" %)**Downlink Control Type**|=(% style="width: 55px; background-color:#D9E2F3;color:#0070C0" %)FPort|=(% style="width: 93px; background-color:#D9E2F3;color:#0070C0" %)**Type Code**|=(% style="width: 146px; background-color: rgb(217, 226, 243); color: rgb(0, 112, 192);" %)**Downlink payload size(bytes)**
541 541  |(% style="width:183px" %)Get Calibration Version Info|(% style="width:55px" %)Any|(% style="width:93px" %)14|(% style="width:146px" %)2
542 542  
543 543  * Reply to the confirmation package: 14 01
544 -
545 545  * Reply to non-confirmed packet: 14 00
546 546  
547 -(% style="color:blue" %)**Step4:**(%%)**After the calibration is completed, its measurement results in this ph buffer solution should be consistent with the numerical value of the command used in the calibration.**
548 548  
549 -Examples:
550 -After using the command AT+PH=9 in 9.18ph buffer
551 -The readout returned by the sensor in 9.18ph buffer should be pH=9
552 -
553 553  == 2.8 Frequency Plans ==
554 554  
555 555  
... ... @@ -634,9 +634,9 @@
634 634  )))
635 635  
636 636  * Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
637 -
638 638  * Use the Join successful sub-band if the server doesn't include sub-band info in the OTAA Join Accept message ( TTN v2 doesn't include)
639 639  
610 +
640 640  === 2.8.3 CN470-510 (CN470) ===
641 641  
642 642  
... ... @@ -745,9 +745,9 @@
745 745  )))
746 746  
747 747  * Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
748 -
749 749  * Use the Join successful sub-band if the server doesn't include sub-band info in the OTAA Join Accept message ( TTN v2 doesn't include)
750 750  
721 +
751 751  === 2.8.5 AS920-923 & AS923-925 (AS923) ===
752 752  
753 753  
... ... @@ -875,6 +875,9 @@
875 875  922.5 - SF7BW125 to SF12BW125
876 876  )))
877 877  
849 +(((
850 +
851 +)))
878 878  
879 879  (((
880 880  (% style="color:blue" %)**Uplink: (OTAA mode, channel added by JoinAccept message)**
... ... @@ -908,6 +908,9 @@
908 908  923.3 - SF7BW125 to SF12BW125
909 909  )))
910 910  
885 +(((
886 +
887 +)))
911 911  
912 912  (((
913 913  (% style="color:blue" %)**Downlink:**
... ... @@ -941,6 +941,9 @@
941 941  865.9850 - SF7BW125 to SF12BW125
942 942  )))
943 943  
921 +(((
922 +
923 +)))
944 944  
945 945  (((
946 946  (% style="color:blue" %)**Downlink:**
... ... @@ -961,9 +961,9 @@
961 961  The LSPH01 has an internal LED which is to show the status of different state.
962 962  
963 963  * The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
964 -
965 965  * Blink once when device transmit a packet.
966 966  
946 +
967 967  == 2.10 ​Firmware Change Log ==
968 968  
969 969  
... ... @@ -1009,6 +1009,9 @@
1009 1009  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>>path:/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
1010 1010  )))
1011 1011  
992 +(((
993 +
994 +)))
1012 1012  
1013 1013  * (((
1014 1014  (% style="color:#4f81bd" %)** Commands special design for LSPH01**
... ... @@ -1026,8 +1026,8 @@
1026 1026  
1027 1027  (% style="color:#037691" %)**AT Command: AT+TDC**
1028 1028  
1029 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1030 -|=(% style="width: 156px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 137px;background-color:#4F81BD;color:white" %)**Function**|=(% style="background-color:#4F81BD;color:white" %)**Response**
1012 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1013 +|=(% style="width: 156px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 137px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="background-color:#D9E2F3;color:#0070C0" %)**Response**
1031 1031  |(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((
1032 1032  30000
1033 1033  OK
... ... @@ -1067,8 +1067,8 @@
1067 1067  
1068 1068  (% style="color:#037691" %)**AT Command: AT+INTMOD**
1069 1069  
1070 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1071 -|=(% style="width: 155px;background-color:#4F81BD;color:white" %)**Command Example**|=(% style="width: 197px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 158px;background-color:#4F81BD;color:white" %)**Response**
1053 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1054 +|=(% style="width: 154px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 196px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 157px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1072 1072  |(% style="width:154px" %)AT+INTMOD=?|(% style="width:196px" %)Show current interrupt mode|(% style="width:157px" %)(((
1073 1073  0
1074 1074  OK
... ... @@ -1099,11 +1099,13 @@
1099 1099  )))
1100 1100  * (((
1101 1101  Example 2: Downlink Payload: 06000003  ~/~/  Set the interrupt mode to rising edge trigger
1085 +)))
1102 1102  
1103 -
1087 +(((
1104 1104  
1105 1105  )))
1106 1106  
1091 +
1107 1107  == 3.3 Calibrate Sensor ==
1108 1108  
1109 1109  
... ... @@ -1117,12 +1117,11 @@
1117 1117  
1118 1118  (% style="color:#037691" %)**Downlink Command: 0x26**
1119 1119  
1120 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:500px" %)
1121 -|(% style="background-color:#4f81bd; color:white; width:193px" %)**Downlink Control Type**|(% style="background-color:#4f81bd; color:white; width:57px" %)**FPort**|(% style="background-color:#4f81bd; color:white; width:91px" %)**Type Code**|(% style="background-color:#4f81bd; color:white; width:159px" %)**Downlink payload size(bytes)**
1105 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %)
1106 +|(% style="background-color:#d9e2f3; color:#0070c0; width:193px" %)**Downlink Control Type**|(% style="background-color:#d9e2f3; color:#0070c0; width:57px" %)**FPort**|(% style="background-color:#d9e2f3; color:#0070c0; width:91px" %)**Type Code**|(% style="background-color:#d9e2f3; color:#0070c0; width:159px" %)**Downlink payload size(bytes)**
1122 1122  |(% style="width:193px" %)Get Firmware Version Info|(% style="width:57px" %)Any|(% style="width:91px" %)26|(% style="width:149px" %)2
1123 1123  
1124 1124  * Reply to the confirmation package: 26 01
1125 -
1126 1126  * Reply to non-confirmed packet: 26 00
1127 1127  
1128 1128  Device will send an uplink after got this downlink command. With below payload:
... ... @@ -1129,8 +1129,8 @@
1129 1129  
1130 1130  Configures info payload:
1131 1131  
1132 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1133 -|(% style="background-color:#4f81bd; color:white; width:50px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:70px" %)**1**|(% style="background-color:#4f81bd; color:white; width:70px" %)**1**|(% style="background-color:#4f81bd; color:white; width:50px" %)**1**|(% style="background-color:#4f81bd; color:white; width:70px" %)**1**|(% style="background-color:#4f81bd; color:white; width:60px" %)**1**|(% style="background-color:#4f81bd; color:white; width:50px" %)**5**|(% style="background-color:#4f81bd; color:white; width:90px" %)**1**
1116 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1117 +|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:70px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:70px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:70px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**5**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**1**
1134 1134  |Value|Software Type|(((
1135 1135  Frequency
1136 1136  Band
... ... @@ -1260,6 +1260,7 @@
1260 1260  * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1261 1261  * (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1262 1262  
1247 +
1263 1263  = 9. ​Packing Info =
1264 1264  
1265 1265  
... ... @@ -1274,6 +1274,7 @@
1274 1274  * Package Size / pcs : cm
1275 1275  * Weight / pcs : g
1276 1276  
1262 +
1277 1277  = 10. ​Support =
1278 1278  
1279 1279  
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