Wiki source code of LA66 USB LoRaWAN Adapter User Manual

Version 167.1 by Edwin Chen on 2024/01/01 11:10

version	line-number	content
134.2	1
87.2	2
87.13	3	Table of Contents:
	4
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
161.3	45	* Support LoRaWAN v1.0.3 protocol
73.1	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.
161.2	85
	86
100.5	87	)))
58.1	88
157.2	89	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN adapter to PC
87.3	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
157.2	102	(% style="color:blue" %)2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it.
87.3	103
78.2	104	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully Join the LoRaWAN network
58.1	105
78.2	106	[[image:image-20220602161935-10.png\|\|height="498" width="800"]]
58.1	107
78.2	108
157.2	109	(% style="color:blue" %)3. See Uplink Command
78.2	110
87.3	111	Command format: (% style="color:#4472c4" %) AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
	112
58.1	113	example: AT+SENDB=01,02,8,05820802581ea0a5
	114
78.2	115	[[image:image-20220602162157-11.png\|\|height="497" width="800"]]
58.1	116
	117
157.2	118	(% style="color:blue" %)4. Check to see if TTN received the message
87.3	119
149.2	120	[[image:image-20220817093644-1.png]]
78.2	121
149.2	122
154.1	123	== 1.6 Example: How to join helium ==
	124
	125
157.2	126	(% style="color:blue" %)1. Create a new device.
	127
154.1	128	[[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"]]
	129
	130
157.2	131	(% style="color:blue" %)2. Save the device after filling in the necessary information.
	132
154.1	133	[[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"]]
	134
	135
	136	(% style="color:blue" %)3. Use AT commands.
	137
	138	[[image:image-20220909151441-1.jpeg\|\|height="695" width="521"]]
	139
	140
157.2	141	(% style="color:blue" %)4. Use the serial port tool
	142
154.1	143	[[image:image-20220909151517-2.png\|\|height="543" width="708"]]
	144
	145
157.2	146	(% style="color:blue" %)5. Use command AT+CFG to get device configuration
	147
154.1	148	[[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"]]
	149
	150
	151	(% style="color:blue" %)6. Network successfully.
	152
	153	[[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"]]
	154
	155
	156	(% style="color:blue" %)7. Send uplink using command
	157
157.2	158	[[image:image-20220912085244-1.png]]
	159
	160	[[image:image-20220912085307-2.png]]
	161
	162
154.1	163	[[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"]]
	164
	165
155.1	166	== 1.7 Example: Send PC's CPU/RAM usage to TTN via python ==
81.1	167
87.3	168
87.1	169	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	170
106.1	171	(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	172
149.6	173
87.3	174	(% style="color:red" %)Preconditions:
81.1	175
87.3	176	(% style="color:red" %)1. LA66 USB LoRaWAN Adapter works fine
81.1	177
87.3	178	(% style="color:red" %)2. LA66 USB LoRaWAN Adapter is registered with TTN
81.1	179
	180
	181
87.3	182	(% style="color:blue" %)Steps for usage:
	183
	184	(% style="color:blue" %)1.(%%) Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
	185
158.1	186	(% style="color:blue" %)2.(%%) Add [[decoder>>https://github.com/dragino/dragino-end-node-decoder/tree/main/LA66%20USB]] on TTN
87.3	187
158.1	188	(% style="color:blue" %)3.(%%) Run the python script in PC and see the TTN
149.6	189
158.1	190
81.1	191	[[image:image-20220602115852-3.png\|\|height="450" width="1187"]]
	192
	193
155.1	194	== 1.8 Example: Send & Get Messages via LoRaWAN in RPi ==
11.1	195
87.4	196
79.1	197	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
12.1	198
79.1	199
157.2	200	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi
87.4	201
106.1	202	[[image:image-20220723100439-2.png]]
43.1	203
52.1	204
157.2	205	(% style="color:blue" %)2. Install Minicom in RPi.
87.4	206
79.1	207	(% id="cke_bm_509388S" style="display:none" %) (%%)Enter the following command in the RPi terminal
52.1	208
87.4	209	(% style="background-color:yellow" %)apt update
52.1	210
87.4	211	(% style="background-color:yellow" %)apt install minicom
52.1	212
79.1	213	Use minicom to connect to the RPI's terminal
52.1	214
79.1	215	[[image:image-20220602153146-3.png\|\|height="439" width="500"]]
52.1	216
	217
157.2	218	(% style="color:blue" %)3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter.
8.1	219
87.11	220	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network.
	221
79.1	222	[[image:image-20220602154928-5.png\|\|height="436" width="500"]]
46.1	223
	224
157.2	225	(% style="color:blue" %)4. Send Uplink message
46.1	226
87.5	227	Format: (% style="color:#4472c4" %)AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
87.4	228
79.1	229	example: AT+SENDB=01,02,8,05820802581ea0a5
46.1	230
79.1	231	[[image:image-20220602160339-6.png\|\|height="517" width="600"]]
	232
87.4	233
	234
79.1	235	Check to see if TTN received the message
	236
157.2	237
79.1	238	[[image:image-20220602160627-7.png\|\|height="369" width="800"]]
	239
	240
155.1	241	== 1.9 Example: Use of LA66 USB LoRaWAN Adapter and mobile APP ==
11.1	242
155.1	243	=== 1.9.1 Hardware and Software Connection ===
13.1	244
134.2	245
146.5	246
134.2	247	==== (% style="color:blue" %)Overview：(%%) ====
	248
	249
134.9	250	(((
139.2	251	DRAGINO-LA66-APP is an Open Source mobile APP for LA66 USB LoRaWAN Adapter. DRAGINO-LA66-APP has below features:
106.1	252
139.2	253	* Send real-time location information of mobile phone to LoRaWAN network.
	254	* Check LoRaWAN network signal strengh.
	255	* Manually send messages to LoRaWAN network.
134.9	256	)))
111.1	257
106.1	258
134.2	259
146.5	260
139.2	261	==== (% style="color:blue" %)Hardware Connection:(%%) ====
134.2	262
149.6	263
139.2	264	A USB to Type-C adapter is needed to connect to a Mobile phone.
134.2	265
139.2	266	Note: The package of LA66 USB adapter already includes this USB Type-C adapter.
106.1	267
139.2	268	[[image:image-20220813174353-2.png\|\|height="360" width="313"]]
106.1	269
	270
146.5	271
139.2	272	==== (% style="color:blue" %)Download and Install App:(%%) ====
134.2	273
149.6	274
139.2	275	[[(% 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)
	276
157.2	277
139.2	278	[[image:image-20220813173738-1.png]]
	279
	280
146.5	281
134.2	282	==== (% style="color:blue" %)Use of APP:(%%) ====
	283
149.6	284
110.1	285	Function and page introduction
	286
149.6	287
139.2	288	[[image:image-20220723113448-7.png\|\|height="995" width="450"]]
110.1	289
157.2	290
161.2	291	(% style="color:blue" %)Block Explain:
134.9	292
139.2	293	1. Display LA66 USB LoRaWAN Module connection status
110.1	294
139.2	295	2. Check and reconnect
110.1	296
139.2	297	3. Turn send timestamps on or off
110.1	298
139.2	299	4. Display LoRaWan connection status
110.1	300
139.2	301	5. Check LoRaWan connection status
110.1	302
139.2	303	6. The RSSI value of the node when the ACK is received
110.1	304
139.2	305	7. Node's Signal Strength Icon
110.1	306
139.2	307	8. Configure Location Uplink Interval
110.1	308
139.2	309	9. AT command input box
110.1	310
139.2	311	10. Send Button: Send input box info to LA66 USB Adapter
110.1	312
139.2	313	11. Output Log from LA66 USB adapter
110.1	314
139.2	315	12. clear log button
110.1	316
139.2	317	13. exit button
110.1	318
134.2	319
149.6	320
106.1	321	LA66 USB LoRaWAN Module not connected
	322
149.6	323
139.2	324	[[image:image-20220723110520-5.png\|\|height="677" width="508"]]
106.1	325
134.2	326
	327
110.1	328	Connect LA66 USB LoRaWAN Module
106.1	329
157.2	330
139.2	331	[[image:image-20220723110626-6.png\|\|height="681" width="511"]]
110.1	332
134.2	333
155.1	334	=== 1.9.2 Send data to TTNv3 and plot location info in Node-Red ===
111.1	335
	336
134.8	337	(% style="color:blue" %)1. Register LA66 USB LoRaWAN Module to TTNV3
134.2	338
149.6	339
113.1	340	[[image:image-20220723134549-8.png]]
	341
	342
134.2	343
134.8	344	(% style="color:blue" %)2. Open Node-RED,And import the JSON file to generate the flow
134.2	345
149.6	346
139.2	347	Sample JSON file please go to [[this link>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]] to download.
117.1	348
139.2	349	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	350
139.2	351	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	352
151.1	353	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	354
151.1	355
139.2	356	Example output in NodeRed is as below:
	357
117.1	358	[[image:image-20220723144339-1.png]]
	359
134.2	360
155.1	361	== 1.10 Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
73.1	362
134.2	363
157.2	364	The LA66 USB LoRaWAN Adapter is the same as the LA66 LoRaWAN Shield update method.
73.1	365
157.2	366	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	367
159.2	368	(% style="color:red" %)Notice: If upgrade via USB hub is not sucessful. try to connect to PC directly.
149.4	369
119.1	370	[[image:image-20220723150132-2.png]]
73.1	371
119.1	372
161.2	373
	374	=== (% style="color:blue" %)Open the Upgrade tool (Tremo Programmer) in PC and Upgrade (%%) ===
	375
	376
160.1	377	1. Software download link: [[https:~~/~~/www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0>>url:https://www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0]]
	378
	379	[[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"]]
	380
	381	[[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"]]
	382
161.2	383
160.1	384	2. Select the COM port corresponding to USB TTL
	385
	386	[[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"]]
	387
161.2	388
160.1	389	3. Select the bin file to burn
	390
	391	[[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"]]
	392
	393	[[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"]]
	394
	395	[[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"]]
	396
161.2	397
160.1	398	4. Click to start the download
	399
	400	[[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"]]
	401
161.2	402
160.1	403	5. Check update process
	404
	405	[[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"]]
	406
161.2	407
160.1	408	The following picture shows that the burning is successful
	409
	410	[[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"]]
	411
161.2	412
146.5	413	= 2. FAQ =
73.1	414
157.4	415	== 2.1 How to Compile Source Code for LA66? ==
137.2	416
	417
146.4	418	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	419
	420
157.3	421	== 2.2 Where to find Peer-to-Peer firmware of LA66? ==
	422
	423
	424	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]]
	425
	426
161.1	427	== 2.3 My device keeps showing invalid credentials, the device goes into low power mode ==
	428
	429
161.2	430	Set the AT+COMMAND: (% style="color:blue" %)AT+UUID=666666666666
161.1	431
164.1	432	== 2.4 How to use external antenna via ipex connector？ ==
	433
	434	You need to remove the spring antenna first, and also remove the resistor and capacitor.
	435	Connect external antenna.
	436
	437	[[image:image-20231129155939-1.png\|\|height="529" width="397"]]
	438
146.5	439	= 3. Order Info =
137.2	440
	441
146.5	442	Part Number: (% style="color:blue" %)LA66-USB-LoRaWAN-Adapter-XXX
87.4	443
	444
87.5	445	(% style="color:blue" %)XXX(%%): The default frequency band
86.1	446
87.5	447	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
	448	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
	449	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
	450	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
	451	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
	452	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
	453	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
	454	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
	455	* (% style="color:red" %)PP(%%): Peer to Peer LoRa Protocol
73.1	456
146.5	457	= 4. Reference =
	458
	459
	460	* Hardware Design File for LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
150.1	461	* Mobile Phone App Source Code: [[Download>>https://github.com/dragino/LA66_Mobile_App]].
149.6	462
157.5	463	= 5. FCC Statement =
	464
	465
	466	(% style="color:red" %)FCC Caution:
	467
	468	Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
	469
	470	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.
	471
	472
	473	(% style="color:red" %)IMPORTANT NOTE:
	474
	475	(% 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:
	476
	477	—Reorient or relocate the receiving antenna.
	478
	479	—Increase the separation between the equipment and receiver.
	480
	481	—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
	482
	483	—Consult the dealer or an experienced radio/TV technician for help.
	484
	485
	486	(% style="color:red" %)FCC Radiation Exposure Statement:
	487
	488	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.

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