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Version 101.1 by Edwin Chen on 2022/11/14 19:39
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1 (% style="text-align:center" %)
2 [[image:image-20221028134937-1.jpeg||height="466" width="466"]]
3
4 (((
5
6
7
8 )))
9
10 **Table of Contents：**
11
12 {{toc/}}
13
14 = **1. Introduction** =
15
16
17 == **1.1 What is LG01-V2** ==
18
19
20 (((
21 (((
22 The LG01-V2 is an (% style="color:green" %)**open-source single channel LoRa Gateway**(%%). It lets you bridge LoRa wireless network to an IP network via (% style="color:green" %)**WiFi , Ethernet or Cellular Network**(%%) (via Optional 4G module). The LoRa wireless allows users to send data and reach extremely long ranges at low data rates.
23 )))
24
25 (((
26 LG01-V2 supports (% style="color:green" %)**remote management**(%%). System Integrator can easy to remote monitor the gateway and maintain it.
27 )))
28
29
30
31 == **1.2 Specifications** ==
32
33
34 (% style="color:#037691" %)**Hardware System:**
35
36 * CPU: Quad-core Cortex-A7 1.2Ghz
37 * RAM: 512MB
38 * eMMC: 4GB
39
40 (% style="color:#037691" %)**Interface:**
41
42 * 10M/100M RJ45 Ports x 1
43 * WiFi 802.11 b/g/n
44
45 (% style="color:#037691" %)**Operating Condition:**
46
47 * Work Temperature: -20 ~~ 65°C
48 * Storage Temperature: -20 ~~ 65°C
49 * Power Input: 5V, 2A, DC
50
51 == **1.3 Features** ==
52
53
54 * Open Source Debian system
55 * Managed by Web GUI, SSH via WAN or WiFi
56 * Remote Management
57 * Auto-provisioning for batch deployment and management
58 * LoRa Gateway
59 * Built-in (% style="color:#037691" %)//**The Things Network**//(%%) local LoRaWAN server
60 * Built-in  (% style="color:#037691" %)//**Node-Red**// (%%)local Application server
61
62 == **1.4 Block Diagram** ==
63
64
65
66 == **1.5 LED Indicators** ==
67
68
69 LG01-V2 has totally four LEDs, They are:
70
71
72 (% style="color:blue" %)//**➢ Power LED**//(%%)//: This RED LED will be solid if the device is properly powered//
73
74 (% style="color:blue" %)//**➢ ETH LED**//(%%)//:  This RGB LED will blink GREEN when the ETH port is connecting//
75
76 (% style="color:blue" %)//**➢ SYS LED**//(%%)//:  This RGB LED will show different colors in different states~://
77
78 // ✓ **SOLID GREEN:** The device is alive with a LoRaWAN server connection.//
79
80 // ✓ **BLINKING GREEN:** a) Device has internet connection but no LoRaWAN Connection. or b) Device is in booting stage, in this stage, it will BLINKING GREEN for several seconds and then with BLINKING GREEN together//
81
82 // ✓** SOLID RED:** Device doesn't have an Internet connection.//
83
84 (% style="color:blue" %)//**➢ WIFI LED**//(%%)//: This LED shows the WIFI interface connection status.//
85
86
87
88 == **1.6 Button Intruction** ==
89
90
91 LG01-V2 has a black toggle button, which is:
92
93
94 (% style="color:blue" %)**//➢ //Long press 4-5s  : **(%%)the gateway will reload the Network and Initialize wifi configuration
95
96 // **LED status: ** ETH LED will BLINKIND BULE Until the reload is finished.//
97
98
99 (% style="color:blue" %)//**➢ **//**Long press more than 10s:**(%%)**    **//the gateway will restore the factory settings.//
100
101 //**LED status: ** ETH LED will SOLID BULE Until the restore is finished.//
102
103
104
105 = **2. Quick Start** =
106
107
108 The LG01-V2 supports network access via Ethernet or Wi-Fi connection and runs without a network.
109
110 In most cases, the first thing you need to do is make the LG01-v2 accessible to the network.
111
112
113 == **2.1 Connects to the network and accesses the gateway Web UI** ==
114
115
116 == **2.1.1 connect the network.** ==
117
118
119 === (% style="color:blue" %)**Method 1**(%%):  Connect via Ethernet with DHCP IP from the router ===
120
121
122 Connect the LG01-V2 Ethernet port to your router and LG01-V2 can obtain an IP address from your router. In the router's management portal, you should be able to find what IP address the router has assigned to the LG01-V2.
123
124 You can also use this IP to connect.
125
126
127 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622100129-1.png?width=1263&height=332&rev=1.1||alt="image-20220622100129-1.png"]]
128
129
130 === (% style="color:blue" %)**Method 2**(%%):  Connect via WiFi with DHCP IP from the router ===
131
132
133 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622100542-2.png?width=1256&height=369&rev=1.1||alt="image-20220622100542-2.png"]]
134
135
136 Fill in the WiFi information by checking the box and clicking (% style="color:red" %)**Save&Apply**
137
138
139 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622102702-6.png?rev=1.1||alt="image-20220622102702-6.png"]]
140
141
142 **Wi-Fi configuration successful**
143
144
145 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220622102847-7.png?rev=1.1||alt="image-20220622102847-7.png"]]
146
147
148
149 = **3. Web Configure Pages** =
150
151 == **3.1 Home** ==
152
153 //Shows the system running status~://
154
155 [[image:image-20221104155612-1.png||height="497" width="942"]]
156
157
158 == **3.2 Network Settings** ==
159
160
161 === **3.2.1 Network ~-~-> WiFi** ===
162
163
164 [[image:image-20221104155654-2.png||height="319" width="813"]]
165
166
167
168 === **3.4.2 Network ~-~-> System Status** ===
169
170
171 [[image:image-20221104155724-3.png||height="679" width="861"]]
172
173
174
175 === **3.4.3 Network ~-~-> Firewall** ===
176
177
178 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220616115351-6.png?width=661&height=244&rev=1.1||alt="image-20220616115351-6.png"]]
179
180
181
182 == **3.5 System** ==
183
184
185 === **3.5.1  System ~-~-> System Overview** ===
186
187
188 Shows the system info:
189
190 [[image:image-20221104155907-4.png]]
191
192
193
194 === **3.5.2 System ~-~-> Backup/Restore** ===
195
196
197 [[image:image-20221104155928-5.png||height="334" width="880"]]
198
199
200 = (% id="cke_bm_1978S" style="display:none" %)** **(%%)**4. Build in Server** =
201
202
203 The default factory version of LG01-V2 is installed with the built-in Applicant server: (% style="color:blue" %)**Node-Red**
204
205
206 [[image:image-20221104155949-6.png||height="315" width="1023"]]
207
208
209 (% style="color:red" %)**Note:**
210
211 **Path**: System ~-~-> Built-in Server
212
213
214 **Troubleshooting:**
215
216
217 **~ 1. URL does not jump properly**
218
219 For the Node-Red, you can use the local IP address and the port is 1880 to access it.
220
221
222
223 == **4.1 Application Server ~-~- Node-Red** ==
224
225
226 You can access the gateway's built-in AS server of (% style="color:blue" %)**Node-Red **(%%)via the URL((% style="background-color:yellow" %)__**//http:~/~/<hostname>:1880 or http:~/~/<local-IPV4-address>//**__(%%)) in your browser.
227
228
229 Such as (% style="background-color:yellow" %)__**//http:~/~/dragino-54ff12:1880  or http:~/~/<Local-IPV4-Address>//**__
230
231
232 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220725172124-3.png?width=843&height=610&rev=1.1||alt="image-20220725172124-3.png"]]
233
234
235 = **5. How to configure the Lora Gateway** =
236
237
238 == **5.1 Access the Lora configuration page** ==
239
240
241 Users can access the Lora configuration page by running the following command, then select the option **''serial port setup"**:
242
243 (% class="box infomessage" %)
244 (((
245 **root@dragino-2406ef:~~# minicom -s**
246 )))
247
248 [[image:image-20221029174637-2.png||height="410" width="524"]]
249
250
251 And then, change the setting:
252
253 (% class="box infomessage" %)
254 (((
255 **Serial Device :** **/dev/ttyUSB0**
256
257 **Bps/Par/Bits : 9600 8N1**
258 )))
259
260
261 (% style="color:red" %)**Note: Enter the corresponding letter to change the configuration, like A,B,C**(%%)
262 (% style="color:red" %)[[image:image-20221029174703-3.png]]
263
264
265 Enter **AT+CFG **in the interface to get the configuration,
266
267
268 (% class="box infomessage" %)
269 (((
270 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency
271 AT+GROUPMOD=0,0  ~-~--> TX and RX group
272 AT+BW=0,0  ~-~--> TX and RX Bandwidth
273 AT+SF=12,12  ~-~--> TX and RX Spreading Factor
274 AT+POWER=14  ~-~--> TX Power Range
275 AT+CRC=1,1  ~-~--> TX and RX CRC Type
276 AT+HEADER=0,0  ~-~--> TX and RX Header Type
277 AT+CR=1,1  ~-~--> TX and RX Coding Rate
278 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
279 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length
280 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
281 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode
282 AT+RXDAFORM=1                              
283 )))
284
285
286 == **5.2 Example: LG01v2** ==
287
288 === **5.2.1 Introduce for the example:** ===
289
290 [[image:image-20221104102736-3.png||height="282" width="723"]]
291
292
293 In this example, there are two devices:
294
295 * **LA66 Shield + UNO + DHT11**: The UNO will get the temperature and humidity and broadcast the value via LoRa protocol.
296 * **LG01v2** : LG01v2 is set to listening the LoRa Channel which LA66 is broadcasting. When LG01v2 get the data from LA66, LG01v2 will plot the data in built-in IoT server.
297
298
299 === 5.2.2 Set Up LA66 Shield + UNO ===
300
301
302 ==== **Set up LA66 Module** ====
303
304 LA66 Module is loaded with the firmware **[[LA66 Peer-to-Peer firmware>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LA66%20LoRaWAN%20Shield%20User%20Manual/Instruction%20for%20LA66%20Peer%20to%20Peer%20firmware/]] **and user can use AT Command to set up LA66 with below parameters:
305
306 (((
307 (% style="color:red" %)**LA66 Shield as Sender: **
308
309 (% class="box infomessage" %)
310 (((
311 **LA66 Shield configuration:**
312
313 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
314 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
315 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
316 AT+POWER=14  ~-~--> TX Power Range set: 14dBm
317 AT+CRC=1,1  ~-~--> TX and RX CRC Type
318 AT+HEADER=0,0  ~-~--> TX and RX Header Type
319 AT+CR=1,1  ~-~--> TX and RX Coding Rate
320 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
321 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
322 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
323 AT+RXMOD=6,0  ~-~-->  Rx Timeout and Reply mode
324 )))
325 )))
326
327
328 ==== **Set up Arduino UNO** ====
329
330 (% id="cke_bm_1033249S" style="display:none" %)** **(%%)**Hardware Connection**
331
332 (% class="box infomessage" %)
333 (((
334 **The DHT11 sensor connects to the LA66 Shield:**
335
336 **VCC  <~-~--> 3.3V (Red line)**
337 **DATA <~-~--> PIN8 (Purple line)**
338 **GND  <~-~--> GND (White line)**
339 )))
340
341 [[image:image-20221108170731-5.png||height="588" width="441"]]
342
343
344 ===== **1. Open Arduino IDE** =====
345
346 [[image:image-20221108172149-6.png||height="650" width="542"]]
347
348
349 ===== **2. Open project** =====
350
351 Users can download Arduino files from this link: [[attach:Log-Temperature-Sensor-and-send-data-to-Node-red.ino||target="_blank"]]
352
353 Then click Compile and Upload to LA66 Shield,
354
355 [[image:image-20221108172432-7.png]]
356
357
358 ===== **3. Open the Serial Monitor to check the LA66 Shield data** =====
359
360 The UNO will now reads the temperature and humidity data from the sensor and broadcast it via LoRa wireless,
361
362 [[image:image-20221108174840-8.png||height="731" width="671"]]
363
364
365 Sending out data as below.
366
367 [[image:image-20221108175113-9.png||height="556" width="998"]]
368
369
370
371 === 5.2.3 Set Up LG01v2 ===
372
373
374 Configure LG01v2 LoRa channel parameters so it can get data from LA66 Shield
375
376 (% style="color:red; font-weight:bold" %)**LG01v**(% style="color:red" %)**2 as Receiver: (configured as AT+RXMOD=65535,2)**
377
378 (% class="box infomessage" %)
379 (((
380 **LG01-V2 configuration:**
381
382 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
383 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
384 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
385 AT+POWER=14  ~-~--> TX Power Range set: 14dBm
386 AT+CRC=1,1  ~-~--> TX and RX CRC Type
387 AT+HEADER=0,0  ~-~--> TX and RX Header Type
388 AT+CR=1,1  ~-~--> TX and RX Coding Rate
389 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
390 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
391 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public)**
392 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode, RX window always open
393 )))
394
395
396 === 5.2.4 Test result ===
397
398 After the above configuration is complete, users can send test simulation data to check whether the configuration is correct, In LA66 sheild serial console send:(% style="color:red" %)**(AT+SEND=1,hello world,2,3).**
399 )))
400
401 When LG01v2 replies with ACK when it receives a packet sent by LA66 sheild.
402
403 [[image:image-20221108164413-2.png]]
404
405
406 In the real-time log of LG01v2：
407
408 [[image:image-20221108170314-3.png]]
409
410
411 === **5.2.5 Plot data chart in LG01v2** ===
412
413
414 User can plot the temperature and humidity chat via LG01v2 built-in IoT server.
415
416 User can import this example in Node-Red: [[attach:Log-Temperature-Sensor-and-send-data-to-node-red.json||target="_blank"]]
417
418 [[image:image-20221108180334-10.png||height="651" width="1141"]]
419
420
421 The temperature and humidity chart is displayed in the built-in node-red UI
422
423 **Browser input: (% style="background-color:yellow" %)__//http:~/~/<local-IPV4-address>//__(%%)**
424
425 [[image:image-20221108180458-11.png||height="402" width="1137"]]
426
427
428 = (% style="color:inherit; font-family:inherit; font-size:29px" %)**6. How users can access LG01**(%%)**v(% style="color:inherit; font-family:inherit; font-size:29px" %)2 using serial USB(%%)** =
429
430
431 (% style="color:blue" %)**USB TTL to LG01-V2  Connection:**
432
433
434 Port 1 of the UART on the LG01-V2 is GND
435
436 (% class="box infomessage" %)
437 (((
438 **TXD  <~-~--> UART RXD (Gray line)**
439
440 **RXD  <~-~--> UART TXD (White line)**
441
442 **GND <~-~--> GND (Black line)**
443 )))
444
445
446 **LG01-V2 UART connection photo**
447
448 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804163015-1.png?width=466&height=621&rev=1.1||alt="image-20220804163015-1.png"]]
449
450
451
452 In the PC, you can use the serial port tool(such as [[putty>>url:http://www.chiark.greenend.org.uk/~~sgtatham/putty/download.html]] in Windows), you need to set the serial baud rate to (% style="color:blue" %)**115200**(%%) to access the serial console for LG01v2. LG01v2 will output system info once power on as below:
453
454
455 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804164928-3.png?width=332&height=320&rev=1.1||alt="image-20220804164928-3.png"]]
456
457 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20All%20Gateway%20models/HP0C/WebHome/image-20220804164747-2.png?width=594&height=622&rev=1.1||alt="image-20220804164747-2.png"]]
458
459
460 = **7. FAQ** =
461
462
463 == **7.1 How does LG01-V2 communicate with Lora shield (LoRa.h)** ==
464
465
466 This example describes how to use LG01-V2, LoRa Shield to set up a LoRa network,
467
468 [[image:image-20221103152238-8.png||height="251" width="654"]]
469
470
471 (% style="color:red" %)**Prerequisites: The configurations of LG01-V2 and Lora shield must match**
472
473 **LG01-V2 configuration:**
474
475 (% class="box infomessage" %)
476 (((
477 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
478 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
479 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
480 AT+POWER=14  ~-~--> TX Power Range
481 AT+CRC=1,1  ~-~--> TX and RX CRC Type
482 AT+HEADER=0,0  ~-~--> TX and RX Header Type
483 AT+CR=1,1  ~-~--> TX and RX Coding Rate
484 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
485 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
486 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public), **the corresponding Lora shield syncword is 0x12
487 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode,RX window always open
488 AT+RXDAFORM=1    
489 )))
490
491 **Lora shield configuration:**
492
493 Lora Shield example: [[attach:LoRa_Shield_Sketch_For_MQTT.ino||target="_blank"]] , [[attach:arduino-LoRa-master.zip||target="_blank"]]
494
495 [[image:image-20221101161318-2.png]]
496
497
498 **Test LG01-V2 to receive Lora Shield data:**
499
500 [[image:image-20221101161951-3.png]]
501
502
503 **Test the LG01-V2 to send data:**
504
505 [[image:image-20221101162527-4.png]]
506
507
508 == **7.2 How does LG01-V2 communicate with Heltec LoRa Node** ==
509
510
511 This example describes how to use LG01-V2 and Heltec LoRa Node to set up a LoRa network,
512
513 [[image:image-20221112161111-2.png||height="258" width="692"]]
514
515 (% style="color:red" %)**Prerequisites: The configurations of LG01-V2 and Lora shield must match**
516
517 **LG01-V2 configuration:**
518
519 (% class="box infomessage" %)
520 (((
521 AT+FRE=868.100,868.100  ~-~--> TX and RX frequency set: 868100000
522 AT+BW=0,0  ~-~--> TX and RX Bandwidth set: 125kHz
523 AT+SF=12,12  ~-~--> TX and RX Spreading Factor set: SF12
524 AT+POWER=14  ~-~--> TX Power Range
525 AT+CRC=1,1  ~-~--> TX and RX CRC Type
526 AT+HEADER=0,0  ~-~--> TX and RX Header Type
527 AT+CR=1,1  ~-~--> TX and RX Coding Rate
528 AT+IQ=0,0  ~-~--> TX and RX InvertIQ
529 AT+PREAMBLE=8,8  ~-~--> TX and RX Preamble Length set: 8
530 AT+SYNCWORD=0  ~-~-->  Syncword**(0: private，1: public), **the corresponding Lora shield syncword is 0x12
531 AT+RXMOD=65535,0  ~-~-->  Rx Timeout and Reply mode,RX window always open
532 AT+RXDAFORM=1  ~-~--> RX data format**（0: Hex ,1: String）**
533 )))
534
535 After we upload the sketch to Heltec LoRa Node, we can see below output from Arduino.
536
537 Lora Shield example: [[attach:LoRa_send_trial.ino||target="_blank"]]
538
539 [[image:image-20221112162733-3.png||height="524" width="927"]]
540
541
542 And we can see the logread of gateway as below, means the packet arrive gateway:
543
544 [[image:image-20221112163119-4.png||height="808" width="560"]]
545
546 = (% style="color:inherit; font-family:inherit; font-size:29px" %)**8. Supports**(%%) =
547
548
549 (((
550 **//If you are experiencing issues and can't solve them, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].//**
551 )))
552
553 (((
554 **//With your question as detailed as possible. We will reply and help you in the shortest.//**
555
556
557
558 = **9. Reference** =
559
560
561 * Install Tago Core: Refer **Install Tago Core in LPS8v2** in[[ Instruction>>doc:Main.Tago\.IO.WebHome]].
562 * [[Advance OS Reference Guide for LPS8v2>>doc:Main.Armbian OS instruction.WebHome]].
563
564
565 )))
566
567 = **10. Order Info** =
568
569
570 (% style="color:#0000ff" %)**LPS8v2-XXX-YYY**
571
572 (% style="color:#0000ff" %)**XXX**(% style="color:black" %): Frequency Band
573
574 * (% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
575 * (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
576 * (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
577 * (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
578 * (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
579 * (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
580
581 (% style="color:#0000ff" %)**YYY**(% style="color:black" %): 4G Cellular Option
582
583 * (% style="color:red" %)**E**(%%):  EMEA, Korea, Thailand, India.
584 * (% style="color:red" %)**A**(%%):  North America/ Rogers/AT&T/T-Mobile.
585 * (% style="color:red" %)**AU**(%%): Latin America, New Zeland, Taiwan
586 * (% style="color:red" %)**J**(%%):  Japan, DOCOMO/SoftBank/ KDDI
587
588 More info about valid bands, please see [[EC25-E product page>>url:https://www.quectel.com/product/ec25.htm]].
589
590
591
592 = **10. Manufacturer Info** =
593
594
595 **Shenzhen Dragino Technology Development co. LTD**
596
597 Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
598
599 LongCheng Street, LongGang District ; Shenzhen 518116,China
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603 = **11. FCC Warning** =
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607 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:
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611 ~-~- Reorient or relocate the receiving antenna.
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615 ~-~- Increase the separation between the equipment and receiver.
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619 ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
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623 ~-~- Consult the dealer or an experienced radio/TV technician for help.
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628 Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
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633 The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
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638 ~)~)~)