Wiki source code of LA66 USB LoRaWAN Adapter User Manual

Version 170.1 by Bei Jinggeng on 2024/03/15 09:47

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
169.1	16	[[image:image-20220715001142-3.png\|\|height="194" width="294"]][[image:image-20240101111030-2.png]]
93.1	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.
100.5	85	)))
58.1	86
157.2	87	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN adapter to PC
87.3	88
106.1	89	[[image:image-20220723100027-1.png]]
78.2	90
87.3	91
58.1	92	Open the serial port tool
	93
	94	[[image:image-20220602161617-8.png]]
	95
157.2	96
78.2	97	[[image:image-20220602161718-9.png\|\|height="457" width="800"]]
58.1	98
	99
157.2	100	(% style="color:blue" %)2. Press the reset switch RST on the LA66 USB LoRaWAN Adapter to reset it.
87.3	101
78.2	102	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully Join the LoRaWAN network
58.1	103
78.2	104	[[image:image-20220602161935-10.png\|\|height="498" width="800"]]
58.1	105
78.2	106
157.2	107	(% style="color:blue" %)3. See Uplink Command
78.2	108
87.3	109	Command format: (% style="color:#4472c4" %) AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
	110
58.1	111	example: AT+SENDB=01,02,8,05820802581ea0a5
	112
78.2	113	[[image:image-20220602162157-11.png\|\|height="497" width="800"]]
58.1	114
	115
157.2	116	(% style="color:blue" %)4. Check to see if TTN received the message
87.3	117
149.2	118	[[image:image-20220817093644-1.png]]
78.2	119
149.2	120
154.1	121	== 1.6 Example: How to join helium ==
	122
	123
157.2	124	(% style="color:blue" %)1. Create a new device.
	125
154.1	126	[[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"]]
	127
	128
157.2	129	(% style="color:blue" %)2. Save the device after filling in the necessary information.
	130
154.1	131	[[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"]]
	132
	133
	134	(% style="color:blue" %)3. Use AT commands.
	135
	136	[[image:image-20220909151441-1.jpeg\|\|height="695" width="521"]]
	137
	138
157.2	139	(% style="color:blue" %)4. Use the serial port tool
	140
154.1	141	[[image:image-20220909151517-2.png\|\|height="543" width="708"]]
	142
	143
157.2	144	(% style="color:blue" %)5. Use command AT+CFG to get device configuration
	145
154.1	146	[[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"]]
	147
	148
	149	(% style="color:blue" %)6. Network successfully.
	150
	151	[[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"]]
	152
	153
	154	(% style="color:blue" %)7. Send uplink using command
	155
157.2	156	[[image:image-20220912085244-1.png]]
	157
	158	[[image:image-20220912085307-2.png]]
	159
	160
154.1	161	[[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"]]
	162
	163
155.1	164	== 1.7 Example: Send PC's CPU/RAM usage to TTN via python ==
81.1	165
87.3	166
87.1	167	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	168
106.1	169	(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	170
149.6	171
87.3	172	(% style="color:red" %)Preconditions:
81.1	173
87.3	174	(% style="color:red" %)1. LA66 USB LoRaWAN Adapter works fine
81.1	175
87.3	176	(% style="color:red" %)2. LA66 USB LoRaWAN Adapter is registered with TTN
81.1	177
	178
87.3	179	(% style="color:blue" %)Steps for usage:
	180
	181	(% style="color:blue" %)1.(%%) Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
	182
158.1	183	(% style="color:blue" %)2.(%%) Add [[decoder>>https://github.com/dragino/dragino-end-node-decoder/tree/main/LA66%20USB]] on TTN
87.3	184
158.1	185	(% style="color:blue" %)3.(%%) Run the python script in PC and see the TTN
149.6	186
158.1	187
81.1	188	[[image:image-20220602115852-3.png\|\|height="450" width="1187"]]
	189
	190
155.1	191	== 1.8 Example: Send & Get Messages via LoRaWAN in RPi ==
11.1	192
87.4	193
79.1	194	Assume user already input the LA66 USB LoRaWAN Adapter OTAA Keys in TTN and there is already TTN network coverage.
12.1	195
157.2	196	(% style="color:blue" %)1. Connect the LA66 USB LoRaWAN Adapter to the Raspberry Pi
87.4	197
106.1	198	[[image:image-20220723100439-2.png]]
43.1	199
52.1	200
157.2	201	(% style="color:blue" %)2. Install Minicom in RPi.
87.4	202
79.1	203	(% id="cke_bm_509388S" style="display:none" %) (%%)Enter the following command in the RPi terminal
52.1	204
87.4	205	(% style="background-color:yellow" %)apt update
52.1	206
87.4	207	(% style="background-color:yellow" %)apt install minicom
52.1	208
79.1	209	Use minicom to connect to the RPI's terminal
52.1	210
79.1	211	[[image:image-20220602153146-3.png\|\|height="439" width="500"]]
52.1	212
	213
157.2	214	(% style="color:blue" %)3. Press the reset switch RST on the LA66 USB LoRaWAN Adapter.
8.1	215
87.11	216	The following picture appears to prove that the LA66 USB LoRaWAN Adapter successfully entered the network.
	217
79.1	218	[[image:image-20220602154928-5.png\|\|height="436" width="500"]]
46.1	219
	220
157.2	221	(% style="color:blue" %)4. Send Uplink message
46.1	222
87.5	223	Format: (% style="color:#4472c4" %)AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
87.4	224
79.1	225	example: AT+SENDB=01,02,8,05820802581ea0a5
46.1	226
79.1	227	[[image:image-20220602160339-6.png\|\|height="517" width="600"]]
	228
87.4	229
79.1	230	Check to see if TTN received the message
	231
157.2	232
79.1	233	[[image:image-20220602160627-7.png\|\|height="369" width="800"]]
	234
	235
155.1	236	== 1.9 Example: Use of LA66 USB LoRaWAN Adapter and mobile APP ==
11.1	237
155.1	238	=== 1.9.1 Hardware and Software Connection ===
13.1	239
134.2	240
	241	==== (% style="color:blue" %)Overview：(%%) ====
	242
134.9	243	(((
139.2	244	DRAGINO-LA66-APP is an Open Source mobile APP for LA66 USB LoRaWAN Adapter. DRAGINO-LA66-APP has below features:
106.1	245
139.2	246	* Send real-time location information of mobile phone to LoRaWAN network.
	247	* Check LoRaWAN network signal strengh.
	248	* Manually send messages to LoRaWAN network.
134.9	249	)))
111.1	250
106.1	251
134.2	252
139.2	253	==== (% style="color:blue" %)Hardware Connection:(%%) ====
134.2	254
139.2	255	A USB to Type-C adapter is needed to connect to a Mobile phone.
134.2	256
139.2	257	Note: The package of LA66 USB adapter already includes this USB Type-C adapter.
106.1	258
139.2	259	[[image:image-20220813174353-2.png\|\|height="360" width="313"]]
106.1	260
	261
139.2	262	==== (% style="color:blue" %)Download and Install App:(%%) ====
134.2	263
139.2	264	[[(% 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)
	265
	266	[[image:image-20220813173738-1.png]]
	267
	268
134.2	269	==== (% style="color:blue" %)Use of APP:(%%) ====
	270
169.2	271	Function and page introduction:
149.6	272
139.2	273	[[image:image-20220723113448-7.png\|\|height="995" width="450"]]
110.1	274
157.2	275
161.2	276	(% style="color:blue" %)Block Explain:
134.9	277
139.2	278	1. Display LA66 USB LoRaWAN Module connection status
110.1	279
139.2	280	2. Check and reconnect
110.1	281
139.2	282	3. Turn send timestamps on or off
110.1	283
139.2	284	4. Display LoRaWan connection status
110.1	285
139.2	286	5. Check LoRaWan connection status
110.1	287
139.2	288	6. The RSSI value of the node when the ACK is received
110.1	289
139.2	290	7. Node's Signal Strength Icon
110.1	291
139.2	292	8. Configure Location Uplink Interval
110.1	293
139.2	294	9. AT command input box
110.1	295
139.2	296	10. Send Button: Send input box info to LA66 USB Adapter
110.1	297
139.2	298	11. Output Log from LA66 USB adapter
110.1	299
139.2	300	12. clear log button
110.1	301
139.2	302	13. exit button
110.1	303
134.2	304
169.2	305	LA66 USB LoRaWAN Module not connected:
149.6	306
139.2	307	[[image:image-20220723110520-5.png\|\|height="677" width="508"]]
106.1	308
134.2	309
169.2	310	Connect LA66 USB LoRaWAN Module:
134.2	311
139.2	312	[[image:image-20220723110626-6.png\|\|height="681" width="511"]]
110.1	313
134.2	314
155.1	315	=== 1.9.2 Send data to TTNv3 and plot location info in Node-Red ===
111.1	316
	317
134.8	318	(% style="color:blue" %)1. Register LA66 USB LoRaWAN Module to TTNV3
134.2	319
149.6	320
113.1	321	[[image:image-20220723134549-8.png]]
	322
	323
134.2	324
134.8	325	(% style="color:blue" %)2. Open Node-RED,And import the JSON file to generate the flow
134.2	326
149.6	327
139.2	328	Sample JSON file please go to [[this link>>https://www.dropbox.com/sh/zxwx16qb777uvkz/AABE_P8coGCQ4DAC8enH4bUya?dl=0]] to download.
117.1	329
139.2	330	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	331
139.2	332	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	333
151.1	334	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	335
151.1	336
139.2	337	Example output in NodeRed is as below:
	338
117.1	339	[[image:image-20220723144339-1.png]]
	340
134.2	341
155.1	342	== 1.10 Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
73.1	343
170.1	344	=== 1.10.1 LA66V1 Update method ===
134.2	345
157.2	346	The LA66 USB LoRaWAN Adapter is the same as the LA66 LoRaWAN Shield update method.
73.1	347
157.2	348	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	349
159.2	350	(% style="color:red" %)Notice: If upgrade via USB hub is not sucessful. try to connect to PC directly.
149.4	351
119.1	352	[[image:image-20220723150132-2.png]]
73.1	353
119.1	354
161.2	355	=== (% style="color:blue" %)Open the Upgrade tool (Tremo Programmer) in PC and Upgrade (%%) ===
	356
	357
160.1	358	1. Software download link: [[https:~~/~~/www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0>>url:https://www.dropbox.com/sh/j0qyc7a9ejit7jk/AACtx2tK4gEv6YFXMIVUM4dLa?dl=0]]
	359
	360	[[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"]]
	361
	362	[[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"]]
	363
161.2	364
160.1	365	2. Select the COM port corresponding to USB TTL
	366
	367	[[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"]]
	368
161.2	369
160.1	370	3. Select the bin file to burn
	371
	372	[[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"]]
	373
	374	[[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"]]
	375
	376	[[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"]]
	377
161.2	378
160.1	379	4. Click to start the download
	380
	381	[[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"]]
	382
161.2	383
160.1	384	5. Check update process
	385
	386	[[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"]]
	387
161.2	388
160.1	389	The following picture shows that the burning is successful
	390
	391	[[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"]]
	392
146.5	393	= 2. FAQ =
73.1	394
157.4	395	== 2.1 How to Compile Source Code for LA66? ==
137.2	396
	397
146.4	398	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	399
	400
157.3	401	== 2.2 Where to find Peer-to-Peer firmware of LA66? ==
	402
	403
	404	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]]
	405
	406
161.1	407	== 2.3 My device keeps showing invalid credentials, the device goes into low power mode ==
	408
	409
161.2	410	Set the AT+COMMAND: (% style="color:blue" %)AT+UUID=666666666666
161.1	411
164.1	412
169.2	413	== 2.4 How to use external antenna via ipex connector? ==
	414
	415
164.1	416	You need to remove the spring antenna first, and also remove the resistor and capacitor.
	417	Connect external antenna.
	418
	419	[[image:image-20231129155939-1.png\|\|height="529" width="397"]]
	420
169.2	421
146.5	422	= 3. Order Info =
137.2	423
	424
146.5	425	Part Number: (% style="color:blue" %)LA66-USB-LoRaWAN-Adapter-XXX
87.4	426
	427
87.5	428	(% style="color:blue" %)XXX(%%): The default frequency band
86.1	429
87.5	430	* (% style="color:red" %)AS923(%%): LoRaWAN AS923 band
	431	* (% style="color:red" %)AU915(%%): LoRaWAN AU915 band
	432	* (% style="color:red" %)EU433(%%): LoRaWAN EU433 band
	433	* (% style="color:red" %)EU868(%%): LoRaWAN EU868 band
	434	* (% style="color:red" %)KR920(%%): LoRaWAN KR920 band
	435	* (% style="color:red" %)US915(%%): LoRaWAN US915 band
	436	* (% style="color:red" %)IN865(%%): LoRaWAN IN865 band
	437	* (% style="color:red" %)CN470(%%): LoRaWAN CN470 band
	438	* (% style="color:red" %)PP(%%): Peer to Peer LoRa Protocol
73.1	439
146.5	440	= 4. Reference =
	441
	442
	443	* Hardware Design File for LA66 USB LoRaWAN Adapter : [[Download>>https://www.dropbox.com/sh/a3wbmdcvqjxaqw5/AADZfvAiykJTK624RgMquH86a?dl=0]]
150.1	444	* Mobile Phone App Source Code: [[Download>>https://github.com/dragino/LA66_Mobile_App]].
149.6	445
157.5	446	= 5. FCC Statement =
	447
	448
	449	(% style="color:red" %)FCC Caution:
	450
	451	Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
	452
	453	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.
	454
	455
	456	(% style="color:red" %)IMPORTANT NOTE:
	457
	458	(% 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:
	459
	460	—Reorient or relocate the receiving antenna.
	461
	462	—Increase the separation between the equipment and receiver.
	463
	464	—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
	465
	466	—Consult the dealer or an experienced radio/TV technician for help.
	467
	468
	469	(% style="color:red" %)FCC Radiation Exposure Statement:
	470
	471	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.
169.2	472
	473

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