Wiki source code of LA66 USB LoRaWAN Adapter User Manual

Version 161.1 by Bei Jinggeng on 2023/06/09 18:08

version	line-number	content
134.2	1
87.2	2
87.13	3	Table of Contents:
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1.1	5	{{toc/}}
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	7
6.1	8
87.2	9
	10
146.5	11	= 1. LA66 USB LoRaWAN Adapter =
87.2	12
146.5	13	== 1.1 Overview ==
88.2	14
100.2	15
93.1	16	[[image:image-20220715001142-3.png\|\|height="145" width="220"]]
	17
100.3	18
100.5	19	(((
91.1	20	(% 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.
100.5	21	)))
52.1	22
100.5	23	(((
101.4	24	(% 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.
100.5	25	)))
73.1	26
100.5	27	(((
90.1	28	Each LA66 module includes a (% style="color:blue" %)world-unique OTAA key(%%) for LoRaWAN registration.
100.5	29	)))
90.1	30
100.5	31	(((
90.1	32	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.
100.5	33	)))
90.1	34
100.5	35	(((
90.1	36	LA66 is equipped with (% style="color:blue" %)TCXO crystal(%%) which ensures the module can achieve stable performance in extreme temperatures.
100.5	37	)))
90.1	38
	39
146.5	40	== 1.2 Features ==
73.1	41
137.6	42
73.1	43	* LoRaWAN USB adapter base on LA66 LoRaWAN module
	44	* Ultra-long RF range
	45	* Support LoRaWAN v1.0.4 protocol
	46	* Support peer-to-peer protocol
	47	* TCXO crystal to ensure RF performance on low temperature
	48	* Spring RF antenna
	49	* Available in different frequency LoRaWAN frequency bands.
	50	* World-wide unique OTAA keys.
	51	* AT Command via UART-TTL interface
	52	* Firmware upgradable via UART interface
93.3	53	* Open Source Mobile App for LoRaWAN signal detect and GPS tracking.
73.1	54
146.5	55	== 1.3 Specification ==
	56
	57
73.1	58	* CPU: 32-bit 48 MHz
	59	* Flash: 256KB
	60	* RAM: 64KB
	61	* Input Power Range: 5v
	62	* Frequency Range: 150 MHz ~~ 960 MHz
	63	* Maximum Power +22 dBm constant RF output
	64	* High sensitivity: -148 dBm
	65	* Temperature:
	66	** Storage: -55 ~~ +125℃
	67	** Operating: -40 ~~ +85℃
	68	* Humidity:
	69	** Storage: 5 ~~ 95% (Non-Condensing)
	70	** Operating: 10 ~~ 95% (Non-Condensing)
	71	* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
	72	* LoRa Rx current: <9 mA
	73
146.5	74	== 1.4 Pin Mapping & LED ==
	75
149.7	76
143.1	77	[[image:image-20220813183239-3.png\|\|height="526" width="662"]]
7.1	78
87.3	79
146.5	80	== 1.5 Example: Send & Get Messages via LoRaWAN in PC ==
87.3	81
146.5	82
100.5	83	(((
78.2	84	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
100.5	85	)))
58.1	86
	87
157.2	88	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN adapter to PC
87.3	89
	90
106.1	91	[[image:image-20220723100027-1.png]]
78.2	92
87.3	93
58.1	94	Open the serial port tool
	95
	96	[[image:image-20220602161617-8.png]]
	97
157.2	98
78.2	99	[[image:image-20220602161718-9.png\|\|height="457" width="800"]]
58.1	100
	101
	102
157.2	103	(% style="color:blue" %)2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it.
87.3	104
149.7	105
78.2	106	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully Join the LoRaWAN network
58.1	107
87.3	108
78.2	109	[[image:image-20220602161935-10.png\|\|height="498" width="800"]]
58.1	110
78.2	111
	112
157.2	113	(% style="color:blue" %)3. See Uplink Command
78.2	114
149.7	115
87.3	116	Command format: (% style="color:#4472c4" %) AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
	117
58.1	118	example: AT+SENDB=01,02,8,05820802581ea0a5
	119
78.2	120	[[image:image-20220602162157-11.png\|\|height="497" width="800"]]
58.1	121
	122
	123
157.2	124	(% style="color:blue" %)4. Check to see if TTN received the message
87.3	125
78.2	126
149.2	127	[[image:image-20220817093644-1.png]]
78.2	128
149.2	129
154.1	130	== 1.6 Example: How to join helium ==
	131
	132
157.2	133
	134	(% style="color:blue" %)1. Create a new device.
	135
	136
154.1	137	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220907165500-1.png?width=940&height=464&rev=1.1\|\|alt="image-20220907165500-1.png"]]
	138
	139
	140
157.2	141	(% style="color:blue" %)2. Save the device after filling in the necessary information.
	142
	143
154.1	144	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220907165837-2.png?width=809&height=375&rev=1.1\|\|alt="image-20220907165837-2.png" height="375" width="809"]]
	145
	146
157.2	147
154.1	148	(% style="color:blue" %)3. Use AT commands.
	149
157.2	150
154.1	151	[[image:image-20220909151441-1.jpeg\|\|height="695" width="521"]]
	152
	153
	154
157.2	155	(% style="color:blue" %)4. Use the serial port tool
	156
	157
154.1	158	[[image:image-20220909151517-2.png\|\|height="543" width="708"]]
	159
	160
	161
157.2	162	(% style="color:blue" %)5. Use command AT+CFG to get device configuration
	163
	164
154.1	165	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220907170308-3.png?width=617&height=556&rev=1.1\|\|alt="image-20220907170308-3.png" height="556" width="617"]]
	166
	167
157.2	168
154.1	169	(% style="color:blue" %)6. Network successfully.
	170
157.2	171
154.1	172	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220907170436-4.png?rev=1.1\|\|alt="image-20220907170436-4.png"]]
	173
	174
157.2	175
154.1	176	(% style="color:blue" %)7. Send uplink using command
	177
	178
157.2	179	[[image:image-20220912085244-1.png]]
	180
	181
	182	[[image:image-20220912085307-2.png]]
	183
	184
	185
154.1	186	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220907170744-6.png?width=798&height=242&rev=1.1\|\|alt="image-20220907170744-6.png" height="242" width="798"]]
	187
	188
155.1	189	== 1.7 Example: Send PC's CPU/RAM usage to TTN via python ==
81.1	190
87.3	191
87.1	192	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]]
81.1	193
106.1	194	(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]])
81.1	195
149.6	196
87.3	197	(% style="color:red" %)Preconditions:
81.1	198
87.3	199	(% style="color:red" %)1. LA66 USB LoRaWAN Adapter works fine
81.1	200
87.3	201	(% style="color:red" %)2. LA66 USB LoRaWAN Adapter is registered with TTN
81.1	202
	203
	204
87.3	205	(% style="color:blue" %)Steps for usage:
	206
	207	(% style="color:blue" %)1.(%%) Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
	208
158.1	209	(% style="color:blue" %)2.(%%) Add [[decoder>>https://github.com/dragino/dragino-end-node-decoder/tree/main/LA66%20USB]] on TTN
87.3	210
158.1	211	(% style="color:blue" %)3.(%%) Run the python script in PC and see the TTN
149.6	212
158.1	213
81.1	214	[[image:image-20220602115852-3.png\|\|height="450" width="1187"]]
	215
	216
155.1	217	== 1.8 Example: Send & Get Messages via LoRaWAN in RPi ==
11.1	218
87.4	219
79.1	220	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
12.1	221
79.1	222
157.2	223	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi
87.4	224
149.6	225
106.1	226	[[image:image-20220723100439-2.png]]
43.1	227
52.1	228
	229
157.2	230	(% style="color:blue" %)2. Install Minicom in RPi.
87.4	231
149.6	232
79.1	233	(% id="cke_bm_509388S" style="display:none" %) (%%)Enter the following command in the RPi terminal
52.1	234
87.4	235	(% style="background-color:yellow" %)apt update
52.1	236
87.4	237	(% style="background-color:yellow" %)apt install minicom
52.1	238
	239
79.1	240	Use minicom to connect to the RPI's terminal
52.1	241
79.1	242	[[image:image-20220602153146-3.png\|\|height="439" width="500"]]
52.1	243
	244
87.4	245
157.2	246	(% style="color:blue" %)3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter.
8.1	247
149.6	248
87.11	249	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network.
	250
	251
79.1	252	[[image:image-20220602154928-5.png\|\|height="436" width="500"]]
46.1	253
	254
	255
157.2	256	(% style="color:blue" %)4. Send Uplink message
46.1	257
149.6	258
87.5	259	Format: (% style="color:#4472c4" %)AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
87.4	260
79.1	261	example: AT+SENDB=01,02,8,05820802581ea0a5
46.1	262
87.4	263
79.1	264	[[image:image-20220602160339-6.png\|\|height="517" width="600"]]
	265
87.4	266
	267
79.1	268	Check to see if TTN received the message
	269
157.2	270
79.1	271	[[image:image-20220602160627-7.png\|\|height="369" width="800"]]
	272
	273
155.1	274	== 1.9 Example: Use of LA66 USB LoRaWAN Adapter and mobile APP ==
11.1	275
155.1	276	=== 1.9.1 Hardware and Software Connection ===
13.1	277
134.2	278
146.5	279
134.2	280	==== (% style="color:blue" %)Overview：(%%) ====
	281
	282
134.9	283	(((
139.2	284	DRAGINO-LA66-APP is an Open Source mobile APP for LA66 USB LoRaWAN Adapter. DRAGINO-LA66-APP has below features:
106.1	285
139.2	286	* Send real-time location information of mobile phone to LoRaWAN network.
	287	* Check LoRaWAN network signal strengh.
	288	* Manually send messages to LoRaWAN network.
134.9	289	)))
111.1	290
106.1	291
134.2	292
146.5	293
139.2	294	==== (% style="color:blue" %)Hardware Connection:(%%) ====
134.2	295
149.6	296
139.2	297	A USB to Type-C adapter is needed to connect to a Mobile phone.
134.2	298
139.2	299	Note: The package of LA66 USB adapter already includes this USB Type-C adapter.
106.1	300
139.2	301	[[image:image-20220813174353-2.png\|\|height="360" width="313"]]
106.1	302
	303
146.5	304
139.2	305	==== (% style="color:blue" %)Download and Install App:(%%) ====
134.2	306
149.6	307
139.2	308	[[(% 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)
	309
157.2	310
139.2	311	[[image:image-20220813173738-1.png]]
	312
	313
146.5	314
134.2	315	==== (% style="color:blue" %)Use of APP:(%%) ====
	316
149.6	317
110.1	318	Function and page introduction
	319
149.6	320
139.2	321	[[image:image-20220723113448-7.png\|\|height="995" width="450"]]
110.1	322
157.2	323
139.2	324	Block Explain:
134.9	325
139.2	326	1. Display LA66 USB LoRaWAN Module connection status
110.1	327
139.2	328	2. Check and reconnect
110.1	329
139.2	330	3. Turn send timestamps on or off
110.1	331
139.2	332	4. Display LoRaWan connection status
110.1	333
139.2	334	5. Check LoRaWan connection status
110.1	335
139.2	336	6. The RSSI value of the node when the ACK is received
110.1	337
139.2	338	7. Node's Signal Strength Icon
110.1	339
139.2	340	8. Configure Location Uplink Interval
110.1	341
139.2	342	9. AT command input box
110.1	343
139.2	344	10. Send Button: Send input box info to LA66 USB Adapter
110.1	345
139.2	346	11. Output Log from LA66 USB adapter
110.1	347
139.2	348	12. clear log button
110.1	349
139.2	350	13. exit button
110.1	351
134.2	352
149.6	353
106.1	354	LA66 USB LoRaWAN Module not connected
	355
149.6	356
139.2	357	[[image:image-20220723110520-5.png\|\|height="677" width="508"]]
106.1	358
134.2	359
	360
110.1	361	Connect LA66 USB LoRaWAN Module
106.1	362
157.2	363
139.2	364	[[image:image-20220723110626-6.png\|\|height="681" width="511"]]
110.1	365
134.2	366
155.1	367	=== 1.9.2 Send data to TTNv3 and plot location info in Node-Red ===
111.1	368
	369
134.8	370	(% style="color:blue" %)1. Register LA66 USB LoRaWAN Module to TTNV3
134.2	371
149.6	372
113.1	373	[[image:image-20220723134549-8.png]]
	374
	375
134.2	376
134.8	377	(% style="color:blue" %)2. Open Node-RED,And import the JSON file to generate the flow
134.2	378
149.6	379
139.2	380	Sample JSON file please go to [[this link>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]] to download.
117.1	381
139.2	382	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/]]
113.1	383
139.2	384	After see LoRaWAN Online, walk around and the APP will keep sending location info to LoRaWAN server and then to the Node Red.
117.1	385
151.1	386	LA66~-~-node-red~-~-decoder:[[dragino-end-node-decoder/Node-RED at main · dragino/dragino-end-node-decoder · GitHub>>url:https://github.com/dragino/dragino-end-node-decoder/tree/main/Node-RED]]
139.2	387
151.1	388
139.2	389	Example output in NodeRed is as below:
	390
117.1	391	[[image:image-20220723144339-1.png]]
	392
134.2	393
155.1	394	== 1.10 Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
73.1	395
134.2	396
157.2	397	The LA66 USB LoRaWAN Adapter is the same as the LA66 LoRaWAN Shield update method.
73.1	398
157.2	399	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).
73.1	400
159.2	401	(% style="color:red" %)Notice: If upgrade via USB hub is not sucessful. try to connect to PC directly.
149.4	402
119.1	403	[[image:image-20220723150132-2.png]]
73.1	404
160.1	405	==== Open the Upgrade tool (Tremo Programmer) in PC and Upgrade ====
119.1	406
160.1	407	1. Software download link: [[https:~~/~~/www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0>>url:https://www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0]]
	408
	409	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602103227-6.png?rev=1.1\|\|alt="image-20220602103227-6.png"]]
	410
	411	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602103357-7.png?rev=1.1\|\|alt="image-20220602103357-7.png"]]
	412
	413	2. Select the COM port corresponding to USB TTL
	414
	415	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602103844-8.png?rev=1.1\|\|alt="image-20220602103844-8.png"]]
	416
	417	3. Select the bin file to burn
	418
	419	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602104144-9.png?rev=1.1\|\|alt="image-20220602104144-9.png"]]
	420
	421	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602104251-10.png?rev=1.1\|\|alt="image-20220602104251-10.png"]]
	422
	423	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602104402-11.png?rev=1.1\|\|alt="image-20220602104402-11.png"]]
	424
	425	4. Click to start the download
	426
	427	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602104923-13.png?rev=1.1\|\|alt="image-20220602104923-13.png"]]
	428
	429	5. Check update process
	430
	431	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602104948-14.png?rev=1.1\|\|alt="image-20220602104948-14.png"]]
	432
	433	The following picture shows that the burning is successful
	434
	435	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/WebHome/image-20220602105251-15.png?rev=1.1\|\|alt="image-20220602105251-15.png"]]
	436
146.5	437	= 2. FAQ =
73.1	438
157.4	439	== 2.1 How to Compile Source Code for LA66? ==
137.2	440
	441
146.4	442	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]]
137.2	443
	444
157.3	445	== 2.2 Where to find Peer-to-Peer firmware of LA66? ==
	446
	447
	448	Instruction for LA66 Peer to Peer firmware :[[ Instruction >>doc:Main.User Manual for LoRaWAN End Nodes.LA66 LoRaWAN Shield User Manual.Instruction for LA66 Peer to Peer firmware.WebHome]]
	449
	450
161.1	451	== 2.3 My device keeps showing invalid credentials, the device goes into low power mode ==
	452
	453	Set the AT+COMMAND:
	454
	455	AT+UUID=666666666666
	456
	457
146.5	458	= 3. Order Info =
137.2	459
	460
146.5	461	Part Number: (% style="color:blue" %)LA66-USB-LoRaWAN-Adapter-XXX
87.4	462
	463
87.5	464	(% style="color:blue" %)XXX(%%): The default frequency band
86.1	465
87.5	466	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
	467	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
	468	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
	469	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
	470	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
	471	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
	472	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
	473	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
	474	* (% style="color:red" %)PP(%%): Peer to Peer LoRa Protocol
73.1	475
146.5	476	= 4. Reference =
	477
	478
	479	* Hardware Design File for LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
150.1	480	* Mobile Phone App Source Code: [[Download>>https://github.com/dragino/LA66_Mobile_App]].
149.6	481
157.5	482	= 5. FCC Statement =
	483
	484
	485	(% style="color:red" %)FCC Caution:
	486
	487	Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
	488
	489	This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
	490
	491
	492	(% style="color:red" %)IMPORTANT NOTE:
	493
	494	(% style="color:red" %)Note:(%%) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
	495
	496	—Reorient or relocate the receiving antenna.
	497
	498	—Increase the separation between the equipment and receiver.
	499
	500	—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
	501
	502	—Consult the dealer or an experienced radio/TV technician for help.
	503
	504
	505	(% style="color:red" %)FCC Radiation Exposure Statement:
	506
	507	This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
158.2	508
	509

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