Last modified by Xiaoling on 2023/07/18 10:12

From version 210.14
edited by Xiaoling
on 2022/10/26 17:27
Change comment: There is no comment for this version
To version 223.4
edited by Xiaoling
on 2022/12/02 15:14
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -16,7 +16,6 @@
16 16  
17 17  = 1. Introduction =
18 18  
19 -
20 20  == 1.1 What is LHT65N Temperature & Humidity Sensor ==
21 21  
22 22  
... ... @@ -45,7 +45,6 @@
45 45  )))
46 46  
47 47  
48 -
49 49  == 1.2 Features ==
50 50  
51 51  
... ... @@ -91,7 +91,6 @@
91 91  
92 92  = 2. Connect LHT65N to IoT Server =
93 93  
94 -
95 95  == 2.1 How does LHT65N work? ==
96 96  
97 97  
... ... @@ -104,7 +104,6 @@
104 104  )))
105 105  
106 106  
107 -
108 108  == 2.2 How to Activate LHT65N? ==
109 109  
110 110  
... ... @@ -113,7 +113,7 @@
113 113  )))
114 114  
115 115  * (((
116 -(% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesnt have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
112 +(% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
117 117  )))
118 118  * (((
119 119  (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
... ... @@ -129,7 +129,6 @@
129 129  [[image:image-20220525110604-2.png||_mstalt="427531" _mstvisible="3"]]
130 130  
131 131  
132 -
133 133  == 2.3 Example to join LoRaWAN network ==
134 134  
135 135  
... ... @@ -146,7 +146,6 @@
146 146  )))
147 147  
148 148  
149 -
150 150  === 2.3.1 Step 1: Create Device n TTN ===
151 151  
152 152  
... ... @@ -187,8 +187,6 @@
187 187  [[image:image-20220522233118-7.png||_mstalt="430430" _mstvisible="3"]]
188 188  
189 189  
190 -
191 -
192 192  === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
193 193  
194 194  
... ... @@ -199,7 +199,6 @@
199 199  [[image:image-20220522233300-8.png||_mstalt="428389" _mstvisible="3" height="219" width="722"]]
200 200  
201 201  
202 -
203 203  == 2.4 Uplink Payload   ( Fport~=2) ==
204 204  
205 205  
... ... @@ -260,7 +260,6 @@
260 260  [[image:image-20220522234118-10.png||_mstalt="451464" _mstvisible="3" height="353" width="729"]]
261 261  
262 262  
263 -
264 264  === 2.4.2 BAT-Battery Info ===
265 265  
266 266  
... ... @@ -309,10 +309,8 @@
309 309  [[image:image-20220523152822-17.png||_mstalt="454545" _mstvisible="3"]]
310 310  
311 311  
312 -
313 313  === 2.4.6 Ext value ===
314 314  
315 -
316 316  ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
317 317  
318 318  
... ... @@ -335,7 +335,6 @@
335 335  If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
336 336  
337 337  
338 -
339 339  ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
340 340  
341 341  
... ... @@ -375,7 +375,6 @@
375 375  [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
376 376  )))
377 377  
378 -
379 379  * **Battery status & Built-in Humidity**
380 380  
381 381  (% _mstvisible="1" border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
... ... @@ -390,7 +390,6 @@
390 390  [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
391 391  )))
392 392  
393 -
394 394  * **Status & Ext Byte**
395 395  
396 396  (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
... ... @@ -403,7 +403,6 @@
403 403  
404 404  
405 405  
406 -
407 407  ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
408 408  
409 409  
... ... @@ -452,7 +452,6 @@
452 452  [[image:image-20220628151143-7.png]]
453 453  
454 454  
455 -
456 456  ==== 2.4.6.4 Ext~=2 TMP117 Sensor (Since Firmware v1.3) ====
457 457  
458 458  
... ... @@ -469,7 +469,6 @@
469 469  The external cable NE2 can be use for MOD4 and MOD8
470 470  
471 471  
472 -
473 473  ==== 2.4.6.5 Ext~=4 Interrupt Mode (Since Firmware v1.3) ====
474 474  
475 475  
... ... @@ -516,8 +516,6 @@
516 516  [[image:image-20220906101145-3.png]]
517 517  
518 518  
519 -
520 -
521 521  ==== 2.4.6.6 Ext~=8 Counting Mode(Since Firmware v1.3) ====
522 522  
523 523  
... ... @@ -569,7 +569,6 @@
569 569  A2 08 02 00 00 00 3C:  Same as AT+ SETCNT=60  (AT+ SETCNT = 4th byte and 5th byte and 6th byte and 7th byte)
570 570  
571 571  
572 -
573 573  == 2.5 Show data on Datacake ==
574 574  
575 575  
... ... @@ -617,7 +617,6 @@
617 617  [[image:image-20220523000825-10.png||_mstalt="450619" _mstvisible="3" height="413" width="728"]]
618 618  
619 619  
620 -
621 621  == 2.6 Datalog Feature ==
622 622  
623 623  
... ... @@ -626,7 +626,6 @@
626 626  )))
627 627  
628 628  
629 -
630 630  === 2.6.1 Ways to get datalog via LoRaWAN ===
631 631  
632 632  
... ... @@ -637,6 +637,7 @@
637 637  
638 638  (% style="color:blue" %)**Method 2: **(%%)Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
639 639  
617 +
640 640  (% style="color:red" %)**Note for method 2:**
641 641  
642 642  * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
... ... @@ -664,10 +664,10 @@
664 664  
665 665  [[image:image-20220523001219-12.png||_mstalt="450827" _mstvisible="3" height="298" width="720"]]
666 666  
645 +
667 667  So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
668 668  
669 669  
670 -
671 671  === 2.6.3 Set Device Time ===
672 672  
673 673  
... ... @@ -691,10 +691,8 @@
691 691  (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.**
692 692  )))
693 693  
694 -(((
695 -
696 -)))
697 697  
673 +
698 698  (((
699 699  **2. Manually Set Time**
700 700  )))
... ... @@ -704,7 +704,6 @@
704 704  )))
705 705  
706 706  
707 -
708 708  === 2.6.4 Poll sensor value ===
709 709  
710 710  
... ... @@ -722,7 +722,6 @@
722 722  Uplink Internal =5s,means LHT65N will send one packet every 5s. range 5~~255s.
723 723  
724 724  
725 -
726 726  === 2.6.5 Datalog Uplink payload ===
727 727  
728 728  
... ... @@ -736,8 +736,6 @@
736 736  )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
737 737  |(% style="width:97px" %)**Value**|(% style="width:123px" %)[[External sensor data>>||anchor="H2.4.6Extvalue"]]|(% style="width:108px" %)[[Built In Temperature>>||anchor="H2.4.3Built-inTemperature"]]|(% style="width:133px" %)[[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]|(% style="width:159px" %)Poll message flag & Ext|(% style="width:80px" %)[[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
738 738  
739 -
740 -
741 741  **Poll message flag & Ext:**
742 742  
743 743  [[image:image-20221006192726-1.png||height="112" width="754"]]
... ... @@ -750,8 +750,6 @@
750 750  
751 751  * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
752 752  
753 -
754 -
755 755  For example, in US915 band, the max payload for different DR is:
756 756  
757 757  (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
... ... @@ -801,10 +801,9 @@
801 801  Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
802 802  
803 803  
774 +== 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
804 804  
805 -== 2.7 Alarm Mode ==
806 806  
807 -
808 808  (((
809 809  when the device is in alarm mode, it checks the built-in sensor temperature for a short time. if the temperature exceeds the preconfigured range, it sends an uplink immediately.
810 810  )))
... ... @@ -813,14 +813,15 @@
813 813  (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
814 814  
815 815  
816 -
817 817  === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
818 818  
819 819  
788 +**Internal GXHT30 temperature alarm(Acquisition time: fixed at one minute)**
789 +
820 820  (((
821 821  (% class="box infomessage" %)
822 822  (((
823 -**AT+WMOD=3,**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
793 +**AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
824 824  
825 825  **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
826 826  
... ... @@ -834,15 +834,120 @@
834 834  )))
835 835  )))
836 836  
807 +(% style="color:#4f81bd" %)**Downlink Command:**
837 837  
838 -
809 +AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
810 +
811 +AT+CITEMP=1 : A60001
812 +
813 +AT+ARTEMP=1,60  :  A70001003C
814 +
815 +AT+ARTEMP=-16,60 :  A7FFF0003C
816 +
817 +AT+LEDALARM=1  :  3601
818 +
819 +
820 +(% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
821 +
822 +Total bytes: 8 bytes
823 +
824 +**Example: **AA0100010001003C
825 +
826 +WMOD=01
827 +
828 +CITEMP=0001
829 +
830 +TEMPlow=0001
831 +
832 +TEMPhigh=003C
833 +
834 +
835 +**DS18B20 and TMP117 Threshold Alarm**
836 +
837 +**~ AT+WMOD=1,60,-10,20**
838 +
839 +(% style="color:#4f81bd" %)**Downlink Command:**
840 +
841 +**Example: **A5013CFC180014
842 +
843 +MOD=01
844 +
845 +CITEMP=3C(S)
846 +
847 +TEMPlow=FC18
848 +
849 +TEMPhigh=0014
850 +
851 +
852 +**Fluctuation alarm for DS18B20 and TMP117(Acquisition time: minimum 1s)**
853 +
854 +**AT+WMOD=2,60,5** 
855 +
856 +(% style="color:#4f81bd" %)**Downlink Command:**
857 +
858 +**Example: **A5023C05
859 +
860 +MOD=02
861 +
862 +CITEMP=3C(S)
863 +
864 +temperature fluctuation=05
865 +
866 +
867 +==== **Sampling multiple times and uplink together** ====
868 +
869 +**AT+WMOD=3,1,60,20,-16,32,1**   
870 +
871 +Explain:
872 +
873 +* Set Working Mode to **Mode 3**
874 +* Sampling Interval is **60**s.
875 +* When there is **20** sampling dats, Device will send these data via one uplink. (max value is 60, means max 60 sampling in one uplink)
876 +* Temperature alarm range is **-16** to **32**°C,
877 +* **1** to enable temperature alarm, **0** to disable the temperature alarm. If alarm is enabled, a data will be sent immediately  if temperate exceeds the Alarm range.
878 +
879 +(% style="color:#4f81bd" %)**Downlink Command:**
880 +
881 +**Example: **A50301003C14FFF0002001
882 +
883 +MOD=03
884 +
885 +EXT=01
886 +
887 +CITEMP=003C(S)
888 +
889 +Total number of acquisitions=14
890 +
891 +TEMPlow=FFF0
892 +
893 +TEMPhigh=0020
894 +
895 +ARTEMP=01
896 +
897 +
898 +**Uplink payload( Fport=3)**
899 +
900 +**Example: CBEA**01**0992**//0A41//**09C4**
901 +
902 +BatV=CBEA
903 +
904 +EXT=01
905 +
906 +Temp1=0992  ~/~/ 24.50℃
907 +
908 +Temp2=0A41  ~/~/ 26.25℃
909 +
910 +Temp3=09C4  ~/~/ 25.00℃
911 +
912 +
913 +(% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
914 +
915 +(% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
839 839  )))
840 840  
841 -(((
918 +
842 842  === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
843 843  
844 -
845 -)))
846 846  
847 847  (% _mstvisible="1" class="box infomessage" %)
848 848  (((
... ... @@ -882,7 +882,6 @@
882 882  TEMPhigh=003C
883 883  
884 884  
885 -
886 886  == 2.8 LED Indicator ==
887 887  
888 888  
... ... @@ -906,10 +906,8 @@
906 906  [[image:image-20220516231650-1.png||_mstalt="428597" _mstvisible="3" height="436" width="428"]]
907 907  
908 908  
909 -
910 910  = 3. Sensors and Accessories =
911 911  
912 -
913 913  == 3.1 E2 Extension Cable ==
914 914  
915 915  
... ... @@ -940,8 +940,6 @@
940 940  [[image:image-20220619092421-3.png||height="371" width="529"]]
941 941  
942 942  
943 -
944 -
945 945  == 3.2 E3 Temperature Probe ==
946 946  
947 947  
... ... @@ -1005,7 +1005,6 @@
1005 1005  )))
1006 1006  
1007 1007  
1008 -
1009 1009  == 4.1 Set Transmit Interval Time ==
1010 1010  
1011 1011  
... ... @@ -1102,7 +1102,6 @@
1102 1102  No downlink command for this feature.
1103 1103  
1104 1104  
1105 -
1106 1106  == 4.5 Quit AT Command ==
1107 1107  
1108 1108  
... ... @@ -1119,7 +1119,6 @@
1119 1119  No downlink command for this feature.
1120 1120  
1121 1121  
1122 -
1123 1123  == 4.6 Set to sleep mode ==
1124 1124  
1125 1125  
... ... @@ -1155,7 +1155,6 @@
1155 1155  0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1156 1156  
1157 1157  
1158 -
1159 1159  == 4.8 Set Time Sync Mode ==
1160 1160  
1161 1161  
... ... @@ -1180,7 +1180,6 @@
1180 1180  0x28 00  ~/~/  Same As AT+SYNCMOD=0
1181 1181  
1182 1182  
1183 -
1184 1184  == 4.9 Set Time Sync Interval ==
1185 1185  
1186 1186  
... ... @@ -1197,7 +1197,6 @@
1197 1197  **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1198 1198  
1199 1199  
1200 -
1201 1201  == 4.10 Print data entries base on page. ==
1202 1202  
1203 1203  
... ... @@ -1214,7 +1214,6 @@
1214 1214  No downlink commands for feature
1215 1215  
1216 1216  
1217 -
1218 1218  == 4.11 Print last few data entries. ==
1219 1219  
1220 1220  
... ... @@ -1231,7 +1231,6 @@
1231 1231  No downlink commands for feature
1232 1232  
1233 1233  
1234 -
1235 1235  == 4.12 Clear Flash Record ==
1236 1236  
1237 1237  
... ... @@ -1269,13 +1269,13 @@
1269 1269  
1270 1270  
1271 1271  
1272 -== 4.14 Modified ATWOOD command for external sensor TMP117 or DS18B20 temperature alarm ==
1334 +== 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm(Since firmware 1.3.0) ==
1273 1273  
1274 1274  
1275 1275  Feature: Set internal and external temperature sensor alarms.
1276 1276  
1277 1277  (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1278 -|=(% style="width: 268px;" %)**Command Example**|=(% style="width: 255px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1340 +|=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1279 1279  |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1280 1280  
1281 1281  (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
... ... @@ -1314,39 +1314,32 @@
1314 1314  
1315 1315  0xA5 01 0A 11 94 29 04 ~-~- AT+WMOD=1,10,45,105  (AT+WMOD = second byte, third byte, fourth and fifth bytes divided by 100, sixth and seventh bytes divided by 100 )
1316 1316  
1379 +0XA5 01 0A F9 C0 29 04 ~-~-AT+WMOD=1,10,-16,105(Need to convert -16 to -1600 for calculation,-1600(DEC)=FFFFFFFFFFFFF9C0(HEX)  FFFFFFFFFFFFF9C0(HEX) +10000(HEX)=F9C0(HEX))
1380 +
1317 1317  0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1318 1318  
1319 1319  0xA5 FF ~-~- After the device receives it, upload the current alarm configuration (FPORT=8). Such as 01 0A 11 94 29 04 or 02 0A 02.
1320 1320  
1321 1321  
1322 -
1323 1323  = 5. Battery & How to replace =
1324 1324  
1325 -
1326 1326  == 5.1 Battery Type ==
1327 1327  
1328 1328  
1329 1329  (((
1330 -(((
1331 1331  LHT65N is equipped with a 2400mAH Li-MnO2 (CR17505) battery . The battery is an un-rechargeable battery with low discharge rate targeting for up to 8~~10 years use. This type of battery is commonly used in IoT devices for long-term running, such as water meters.
1332 1332  )))
1333 -)))
1334 1334  
1335 1335  (((
1336 -
1337 -)))
1338 -
1339 -(((
1340 -(((
1341 1341  The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1397 +
1398 +
1342 1342  [[image:image-20220515075034-1.png||_mstalt="428961" _mstvisible="4" height="208" width="644"]]
1343 1343  )))
1344 -)))
1345 1345  
1346 1346  The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1347 1347  
1348 1348  
1349 -
1350 1350  == 5.2 Replace Battery ==
1351 1351  
1352 1352  
... ... @@ -1355,7 +1355,6 @@
1355 1355  [[image:image-20220515075440-2.png||_mstalt="429546" _mstvisible="3" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" _mstvisible="3" height="193" width="257"]]
1356 1356  
1357 1357  
1358 -
1359 1359  == 5.3 Battery Life Analyze ==
1360 1360  
1361 1361  
... ... @@ -1364,9 +1364,6 @@
1364 1364  [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
1365 1365  )))
1366 1366  
1367 -(((
1368 -
1369 -)))
1370 1370  
1371 1371  (((
1372 1372  A full detail test report for LHT65N on different frequency can be found at : [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0>>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
... ... @@ -1373,10 +1373,8 @@
1373 1373  )))
1374 1374  
1375 1375  
1376 -
1377 1377  = 6. FAQ =
1378 1378  
1379 -
1380 1380  == 6.1 How to use AT Command? ==
1381 1381  
1382 1382  
... ... @@ -1597,7 +1597,6 @@
1597 1597  AT+PID:  Get or set the PID
1598 1598  
1599 1599  
1600 -
1601 1601  == 6.2 Where to use AT commands and Downlink commands ==
1602 1602  
1603 1603  
... ... @@ -1637,7 +1637,6 @@
1637 1637  [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1638 1638  
1639 1639  
1640 -
1641 1641  == 6.3 How to change the uplink interval? ==
1642 1642  
1643 1643  
... ... @@ -1644,7 +1644,6 @@
1644 1644  Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/||_msthash="506137" _msttexthash="5712018" style="background-color: rgb(255, 255, 255);"]]
1645 1645  
1646 1646  
1647 -
1648 1648  == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1649 1649  
1650 1650  
... ... @@ -1663,7 +1663,6 @@
1663 1663  [[image:image-20220615154519-3.png||height="672" width="807"]]
1664 1664  
1665 1665  
1666 -
1667 1667  == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1668 1668  
1669 1669  
... ... @@ -1706,7 +1706,6 @@
1706 1706  Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1707 1707  
1708 1708  
1709 -
1710 1710  == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1711 1711  
1712 1712  
... ... @@ -1726,7 +1726,6 @@
1726 1726  [[image:image-20220615154519-3.png||height="672" width="807"]]
1727 1727  
1728 1728  
1729 -
1730 1730  == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1731 1731  
1732 1732  
... ... @@ -1748,7 +1748,7 @@
1748 1748  [[image:image-20220623113959-5.png||height="528" width="397"]]
1749 1749  
1750 1750  (% _msthash="506146" _msttexthash="52173160" %)
1751 -Press and hold the start key to restart and enter  (% _mstvisible="1" %)bootlaod(%%) mode.
1794 +Connect A8 and GND with Dupont wire for a while and then separate,enter reset mode
1752 1752  
1753 1753  
1754 1754  
... ... @@ -1765,10 +1765,9 @@
1765 1765  [[image:image-20220620160723-8.png]]
1766 1766  
1767 1767  
1768 -Finally,restart reset device again
1811 +Finally,Disconnect 3.3v,Connect A8 and GND with Dupont wire for a while and then separate,exit reset mode
1769 1769  
1770 1770  
1771 -
1772 1772  = 7. Order Info =
1773 1773  
1774 1774  
... ... @@ -1801,7 +1801,7 @@
1801 1801  
1802 1802  **Dimension and weight**:
1803 1803  
1804 -* Device Size:  10 x 10 x 3.5 cm
1846 +* Device Size:  10 x 10 x 3.5 mm
1805 1805  * Device Weight: 120.5g
1806 1806  
1807 1807