Summary

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Details

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Title

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1		-LA66 LoRaWAN Module
	1	+LA66 LoRaWAN Shield User Manual

Content

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6	6
7	7
8	8
9		-= 1.  LA66 LoRaWAN Module =
10	10
	10	+= 1.  LA66 LoRaWAN Shield =
11	11
12		-== 1.1  What is LA66 LoRaWAN Module ==
13	13
	13	+== 1.1  Overview ==
14	14
	15	+
15	15	(((
16		-[[image:image-20220715000242-1.png||height="110" width="132"]]
	17	+[[image:image-20220715000826-2.png||height="145" width="220"]]
	18	+)))
17	17
18		-(% style="color:blue" %)**Dragino LA66**(%%) is a small wireless LoRaWAN module that offers a very compelling mix of long-range, low power consumption, and secure data transmission. It is designed to facilitate developers to quickly deploy industrial-level LoRaWAN and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to create and connect your things everywhere.
	20	+(((
	21	+
19	19	)))
20	20
21	21	(((
22		-(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
	25	+(% style="color:blue" %)**LA66 LoRaWAN Shield**(%%) is the Arduino shield base on LA66. Users can use LA66 LoRaWAN Shield to rapidly add LoRaWAN or peer-to-peer LoRa wireless function to  Arduino projects.
23	23	)))
24	24
25	25	(((
	29	+(((
	30	+(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.3 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely.  This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
	31	+)))
	32	+)))
	33	+
	34	+(((
	35	+(((
26	26	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
27	27	)))
	38	+)))
28	28
29	29	(((
	41	+(((
30	30	Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application.
31	31	)))
	44	+)))
32	32
33	33	(((
	47	+(((
34	34	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
35	35	)))
	50	+)))
36	36
37	37
	53	+
38	38	== 1.2  Features ==
39	39
	56	+
	57	+* Arduino Shield base on LA66 LoRaWAN module
40	40	* Support LoRaWAN v1.0.4 protocol
41	41	* Support peer-to-peer protocol
42	42	* TCXO crystal to ensure RF performance on low temperature
43		-* SMD Antenna pad and i-pex antenna connector
	61	+* SMA connector
44	44	* Available in different frequency LoRaWAN frequency bands.
45	45	* World-wide unique OTAA keys.
46	46	* AT Command via UART-TTL interface
...	...	@@ -49,8 +49,10 @@
49	49
50	50
51	51
	70	+
52	52	== 1.3  Specification ==
53	53
	73	+
54	54	* CPU: 32-bit 48 MHz
55	55	* Flash: 256KB
56	56	* RAM: 64KB
...	...	@@ -72,115 +72,108 @@
72	72
73	73
74	74
75		-== 1.4  AT Command ==
	95	+== 1.4  Pin Mapping & LED ==
76	76
77	77
78		-AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
	98	+[[image:image-20220814101457-1.png||height="553" width="761"]]
79	79
	100	+~1. The LED lights up red when there is an upstream data packet
	101	+2. When the network is successfully connected, the green light will be on for 5 seconds
	102	+3. Purple light on when receiving downlink data packets
80	80
81	81
82		-== 1.5  Dimension ==
83	83
84		-[[image:image-20220718094750-3.png]]
	106	+== 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
85	85
86	86
	109	+**Show connection diagram：**
87	87
88	88
89		-== 1.6  Pin Mapping ==
	112	+[[image:image-20220723170210-2.png||height="908" width="681"]]
90	90
91	91
92		-[[image:image-20220523101537-1.png]]
93	93
	116	+(% style="color:blue" %)**1.  open Arduino IDE**
94	94
95	95
96		-== 1.7  Land Pattern ==
	119	+[[image:image-20220723170545-4.png]]
97	97
98		-[[image:image-20220517072821-2.png]]
99	99
100	100
	123	+(% style="color:blue" %)**2.  Open project**
101	101
102		-= 2.  LA66 LoRaWAN Shield =
103	103
	126	+LA66-LoRaWAN-shield-AT-command-via-Arduino-UNO source code link: [[https:~~/~~/www.dropbox.com/sh/cx0pspkwu62pr97/AAAbKh2ioPdZfSDtdDpooYqha?dl=0>>https://www.dropbox.com/sh/cx0pspkwu62pr97/AAAbKh2ioPdZfSDtdDpooYqha?dl=0]]
104	104
105		-== 2.1  Overview ==
	128	+[[image:image-20220726135239-1.png]]
106	106
107	107
108		-[[image:image-20220715000826-2.png||height="386" width="449"]]
	131	+(% style="color:blue" %)**3.  Click the button marked 1 in the figure to compile, and after the compilation is complete, click the button marked 2 in the figure to upload**
109	109
	133	+[[image:image-20220726135356-2.png]]
110	110
111		-LA66 LoRaWAN Shield is the Arduino shield base on LA66. Users can use LA66 LoRaWAN Shield to rapidly add LoRaWAN or peer-to-peer LoRa wireless function to  Arduino projects.
112	112
113		-(((
114		-(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
115		-)))
	136	+(% style="color:blue" %)**4.  After the upload is successful, open the serial port monitoring and send the AT command**
116	116
117		-(((
118		-Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
119		-)))
120	120
121		-(((
122		-Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application.
123		-)))
	139	+[[image:image-20220723172235-7.png||height="480" width="1027"]]
124	124
125		-(((
126		-LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
127		-)))
128	128
129	129
130		-== 2.2  Features ==
	143	+== 1.6  Example: Join TTN network and send an uplink message, get downlink message. ==
131	131
132		-* Arduino Shield base on LA66 LoRaWAN module
133		-* Support LoRaWAN v1.0.4 protocol
134		-* Support peer-to-peer protocol
135		-* TCXO crystal to ensure RF performance on low temperature
136		-* SMA connector
137		-* Available in different frequency LoRaWAN frequency bands.
138		-* World-wide unique OTAA keys.
139		-* AT Command via UART-TTL interface
140		-* Firmware upgradable via UART interface
141		-* Ultra-long RF range
142	142
143		-== 2.3  Specification ==
	146	+(% style="color:blue" %)**1.  Open project**
144	144
145		-* CPU: 32-bit 48 MHz
146		-* Flash: 256KB
147		-* RAM: 64KB
148		-* Input Power Range: 1.8v ~~ 3.7v
149		-* Power Consumption: < 4uA.
150		-* Frequency Range: 150 MHz ~~ 960 MHz
151		-* Maximum Power +22 dBm constant RF output
152		-* High sensitivity: -148 dBm
153		-* Temperature:
154		-** Storage: -55 ~~ +125℃
155		-** Operating: -40 ~~ +85℃
156		-* Humidity:
157		-** Storage: 5 ~~ 95% (Non-Condensing)
158		-** Operating: 10 ~~ 95% (Non-Condensing)
159		-* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
160		-* LoRa Rx current: <9 mA
161		-* I/O Voltage: 3.3v
162	162
163		-== 2.4  Pin Mapping & LED ==
	149	+Join-TTN-network source code link: [[https:~~/~~/www.dropbox.com/sh/0sjyncafa0gjv00/AACC2m1orov-QHRkvH8-ddCka?dl=0>>https://www.dropbox.com/sh/0sjyncafa0gjv00/AACC2m1orov-QHRkvH8-ddCka?dl=0]]
164	164
165	165
	152	+[[image:image-20220723172502-8.png]]
166	166
167		-== 2.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
168	168
169	169
	156	+(% style="color:blue" %)**2.  Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets**
170	170
171		-== 2.6  Example: Join TTN network and send an uplink message, get downlink message. ==
172	172
	159	+[[image:image-20220723172938-9.png||height="652" width="1050"]]
173	173
174	174
175		-== 2.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
176	176
	163	+== 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED. ==
177	177
178	178
179		-== 2.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
	166	+(% style="color:blue" %)**1.  Open project**
180	180
181	181
182		-=== 2.8.1  Items needed for update ===
	169	+Log-Temperature-Sensor-and-send-data-to-TTN source code link: [[https:~~/~~/www.dropbox.com/sh/0aagmrpec1lxmva/AABMXWVMSHG9dK1_Zv_7xOmCa?dl=0>>https://www.dropbox.com/sh/0aagmrpec1lxmva/AABMXWVMSHG9dK1_Zv_7xOmCa?dl=0]]
183	183
	171	+
	172	+[[image:image-20220723173341-10.png||height="581" width="1014"]]
	173	+
	174	+
	175	+
	176	+(% style="color:blue" %)**2.  Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets**
	177	+
	178	+
	179	+[[image:image-20220723173950-11.png||height="665" width="1012"]]
	180	+
	181	+
	182	+
	183	+(% style="color:blue" %)**3.  Integration into Node-red via TTNV3**
	184	+
	185	+For the usage of Node-RED, please refer to: [[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/Node-RED/>>http://8.211.40.43:8080/xwiki/bin/view/Main/Node-RED/]]
	186	+
	187	+[[image:image-20220723175700-12.png||height="602" width="995"]]
	188	+
	189	+
	190	+
	191	+== 1.8  Upgrade Firmware of LA66 LoRaWAN Shield ==
	192	+
	193	+
	194	+=== 1.8.1  Items needed for update ===
	195	+
	196	+
184	184	1. LA66 LoRaWAN Shield
185	185	1. Arduino
186	186	1. USB TO TTL Adapter
...	...	@@ -188,9 +188,10 @@
188	188	[[image:image-20220602100052-2.png||height="385" width="600"]]
189	189
190	190
191		-=== 2.8.2  Connection ===
192	192
	205	+=== 1.8.2  Connection ===
193	193
	207	+
194	194	[[image:image-20220602101311-3.png||height="276" width="600"]]
195	195
196	196
...	...	@@ -213,10 +213,11 @@
213	213	[[image:image-20220602102240-4.png||height="304" width="600"]]
214	214
215	215
	230	+
216	216	=== 2.8.3  Upgrade steps ===
217	217
218	218
219		-==== 1.  Switch SW1 to put in ISP position ====
	234	+==== (% style="color:blue" %)1.  Switch SW1 to put in ISP position(%%) ====
220	220
221	221
222	222	[[image:image-20220602102824-5.png||height="306" width="600"]]
...	...	@@ -223,7 +223,7 @@
223	223
224	224
225	225
226		-==== 2.  Press the RST switch once ====
	241	+==== (% style="color:blue" %)2.  Press the RST switch once(%%) ====
227	227
228	228
229	229	[[image:image-20220602104701-12.png||height="285" width="600"]]
...	...	@@ -230,7 +230,7 @@
230	230
231	231
232	232
233		-==== 3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ====
	248	+==== (% style="color:blue" %)3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade(%%) ====
234	234
235	235
236	236	(((
...	...	@@ -294,21 +294,35 @@
294	294
295	295	== 3.1  Overview ==
296	296
	312	+
297	297	[[image:image-20220715001142-3.png||height="145" width="220"]]
298	298
	315	+
	316	+(((
299	299	(% style="color:blue" %)**LA66 USB LoRaWAN Adapter**(%%) is designed to fast turn USB devices to support LoRaWAN wireless features. It combines a CP2101 USB TTL Chip and LA66 LoRaWAN module which can easy to add LoRaWAN wireless feature to PC / Mobile phone or an embedded device that has USB Interface.
	318	+)))
300	300
301		-(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
	320	+(((
	321	+(% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.3 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
	322	+)))
302	302
	324	+(((
303	303	Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
	326	+)))
304	304
	328	+(((
305	305	Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application.
	330	+)))
306	306
	332	+(((
307	307	LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
	334	+)))
308	308
309	309
	337	+
310	310	== 3.2  Features ==
311	311
	340	+
312	312	* LoRaWAN USB adapter base on LA66 LoRaWAN module
313	313	* Ultra-long RF range
314	314	* Support LoRaWAN v1.0.4 protocol
...	...	@@ -323,6 +323,7 @@
323	323
324	324	== 3.3  Specification ==
325	325
	355	+
326	326	* CPU: 32-bit 48 MHz
327	327	* Flash: 256KB
328	328	* RAM: 64KB
...	...	@@ -341,18 +341,21 @@
341	341
342	342	== 3.4  Pin Mapping & LED ==
343	343
	374	+[[image:image-20220813183239-3.png||height="526" width="662"]]
344	344
345	345
346	346	== 3.5  Example: Send & Get Messages via LoRaWAN in PC ==
347	347
348	348
	380	+(((
349	349	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
	382	+)))
350	350
351	351
352	352	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN adapter to PC**
353	353
354	354
355		-[[image:image-20220602171217-1.png||height="538" width="800"]]
	388	+[[image:image-20220723100027-1.png]]
356	356
357	357
358	358	Open the serial port tool
...	...	@@ -393,6 +393,7 @@
393	393
394	394	**Use python as an example：**[[https:~~/~~/github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py>>https://github.com/dragino/LA66/blob/main/Send_information_to_TTN_WindosPC.py]]
395	395
	429	+(**Raspberry Pi example: **[[https:~~/~~/github.com/dragino/LA66/blob/main/Send_information_to_TTN_Raspberry%20Pi.py>>https://github.com/dragino/LA66/blob/main/Send_information_to_TTN_Raspberry%20Pi.py]])
396	396
397	397	(% style="color:red" %)**Preconditions:**
398	398
...	...	@@ -420,7 +420,7 @@
420	420
421	421	(% style="color:blue" %)**1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi**
422	422
423		-[[image:image-20220602171233-2.png||height="538" width="800"]]
	457	+[[image:image-20220723100439-2.png]]
424	424
425	425
426	426
...	...	@@ -465,18 +465,136 @@
465	465
466	466
467	467
468		-== 3.8  Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
	502	+== 3.8  Example: Use of LA66 USB LoRaWAN Adapter and mobile APP ==
469	469
470	470
	505	+=== 3.8.1  Hardware and Software Connection ===
471	471
	507	+
	508	+==== (% style="color:blue" %)**Overview：**(%%) ====
	509	+
	510	+
	511	+(((
	512	+DRAGINO-LA66-APP is an Open Source mobile APP for LA66 USB LoRaWAN Adapter. DRAGINO-LA66-APP has below features:
	513	+
	514	+* Send real-time location information of mobile phone to LoRaWAN network.
	515	+* Check LoRaWAN network signal strengh.
	516	+* Manually send messages to LoRaWAN network.
	517	+)))
	518	+
	519	+
	520	+
	521	+==== (% style="color:blue" %)**Hardware Connection:**(%%) ====
	522	+
	523	+A USB to Type-C adapter is needed to connect to a Mobile phone.
	524	+
	525	+Note: The package of LA66 USB adapter already includes this USB Type-C adapter.
	526	+
	527	+[[image:image-20220813174353-2.png||height="360" width="313"]]
	528	+
	529	+
	530	+==== (% style="color:blue" %)**Download and Install App:**(%%) ====
	531	+
	532	+[[(% id="cke_bm_895007S" style="display:none" %)** **(%%)**Download Link for Android apk **>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]].  (Android Version Only)
	533	+
	534	+[[image:image-20220813173738-1.png]]
	535	+
	536	+
	537	+==== (% style="color:blue" %)**Use of APP:**(%%) ====
	538	+
	539	+Function and page introduction
	540	+
	541	+[[image:image-20220723113448-7.png||height="995" width="450"]]
	542	+
	543	+**Block Explain:**
	544	+
	545	+1.  Display LA66 USB LoRaWAN Module connection status
	546	+
	547	+2.  Check and reconnect
	548	+
	549	+3.  Turn send timestamps on or off
	550	+
	551	+4.  Display LoRaWan connection status
	552	+
	553	+5.  Check LoRaWan connection status
	554	+
	555	+6.  The RSSI value of the node when the ACK is received
	556	+
	557	+7.  Node's Signal Strength Icon
	558	+
	559	+8.  Configure Location Uplink Interval
	560	+
	561	+9.  AT command input box
	562	+
	563	+10.  Send Button:  Send input box info to LA66 USB Adapter
	564	+
	565	+11.  Output Log from LA66 USB adapter
	566	+
	567	+12.  clear log button
	568	+
	569	+13.  exit button
	570	+
	571	+
	572	+LA66 USB LoRaWAN Module not connected
	573	+
	574	+[[image:image-20220723110520-5.png||height="677" width="508"]]
	575	+
	576	+
	577	+
	578	+Connect LA66 USB LoRaWAN Module
	579	+
	580	+[[image:image-20220723110626-6.png||height="681" width="511"]]
	581	+
	582	+
	583	+
	584	+=== 3.8.2 Send data to TTNv3 and plot location info in Node-Red ===
	585	+
	586	+
	587	+(% style="color:blue" %)**1.  Register LA66 USB LoRaWAN Module to TTNV3**
	588	+
	589	+[[image:image-20220723134549-8.png]]
	590	+
	591	+
	592	+
	593	+(% style="color:blue" %)**2.  Open Node-RED,And import the JSON file to generate the flow**
	594	+
	595	+Sample JSON file please go to **[[this link>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]]** to download.
	596	+
	597	+For the usage of Node-RED, please refer to: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Node-RED/>>http://wiki.dragino.com/xwiki/bin/view/Main/Node-RED/]]
	598	+
	599	+After see LoRaWAN Online, walk around and the APP will keep sending location info to LoRaWAN server and then to the Node Red.
	600	+
	601	+
	602	+Example output in NodeRed is as below:
	603	+
	604	+[[image:image-20220723144339-1.png]]
	605	+
	606	+
	607	+
472	472	== 3.9  Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
473	473
474	474
	611	+The LA66 USB LoRaWAN Adapter is the same as the LA66 LoRaWAN Shield update method
475	475
	613	+Just use the yellow jumper cap to short the BOOT corner and the RX corner, and then press the RESET button (without the jumper cap, you can directly short the BOOT corner and the RX corner with a wire to achieve the same effect)
476	476
477		-= 4.  Order Info =
	615	+[[image:image-20220723150132-2.png]]
478	478
479	479
	618	+
	619	+= 4.  FAQ =
	620	+
	621	+
	622	+== 4.1  How to Compile Source Code for LA66? ==
	623	+
	624	+
	625	+Compile and Upload Code to ASR6601 Platform ：[[Instruction>>Main.User Manual for LoRaWAN End Nodes.LA66 LoRaWAN Module.Compile and Upload Code to ASR6601 Platform.WebHome]]
	626	+
	627	+
	628	+
	629	+= 5.  Order Info =
	630	+
	631	+
480	480	**Part Number:**  (% style="color:blue" %)**LA66-XXX**(%%), (% style="color:blue" %)**LA66-LoRaWAN-Shield-XXX** (%%) **or**  (% style="color:blue" %)**LA66-USB-LoRaWAN-Adapter-XXX**
481	481
482	482
...	...	@@ -492,7 +492,7 @@
492	492	* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
493	493	* (% style="color:red" %)**PP**(%%):  Peer to Peer LoRa Protocol
494	494
495		-= 5.  Reference =
	647	+= 6.  Reference =
496	496
497		-* Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
498	498
	650	+* Hardware Design File for LA66 LoRaWAN Shield, LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]

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