Last modified by Xiaoling on 2024/10/21 15:44

From version 73.5
edited by Xiaoling
on 2022/05/07 14:55
Change comment: There is no comment for this version
To version 74.4
edited by Xiaoling
on 2022/05/14 14:50
Change comment: There is no comment for this version

Summary

Details

Page properties
Title
... ... @@ -1,1 +1,1 @@
1 -HP0D
1 +HP0D Full Hotspot for Helium
Content
... ... @@ -9,122 +9,51 @@
9 9  )))
10 10  
11 11  
12 + **Contents:**
12 12  
13 -
14 -
15 15  {{toc/}}
16 16  
17 17  
18 -==== 1. Introduction ====
17 += 1. Introduction =
19 19  
20 -===== 1.1 What is HP0D =====
19 +== 1.1 What is HP0D ==
21 21  
22 22  (((
23 -(((
24 -(((
25 25  The HP0D is an outdoor LoRaWAN Gateway. It lets you bridge LoRa wireless network to an IP network via WiFi,Ethernet, optional 3G or 4G. The LoRa wireless allows users to send  data and reach extremely long ranges at low data rates.
26 26  )))
27 -)))
28 -)))
29 29  
30 30  (((
31 -(((
32 -(((
33 -HP0D has passed Helium Full Hotspot Approval. It supports the **miner feature from Helium** and has a built-in ATECC608 encryption chip. It can be used as a Helium Full Hotspot  for the project. It also supports Semtech packet forwarder and LoRaWAN Station connection, it is fully compatible with LoRaWAN protocol.
26 +HP0D has passed Helium Full Hotspot Approval. It supports the **miner feature from Helium** and has a built-in ATECC608 encryption chip. It can be used as a Helium Full Hotspot  for the project. It also supports Semtech packet forwarder and LoRaWAN Station connection, it is fully compatible with LoRaWAN protocol.HP0D supports two LoRaWAN servers at the same time, **users can use HP0D for helium mining and connects max 2 x LoRaWAN servers at the same time**.
34 34  )))
35 -)))
36 -)))
37 37  
38 38  (((
39 -(((
40 -(((
41 -HP0D supports two LoRaWAN servers  at the same time, **users can use HP0D for helium mining and connects max 2 x LoRaWAN servers at the same time**.
42 -)))
43 -)))
44 -)))
45 -
46 -(((
47 -(((
48 -(((
49 49  **Dragino already paid HP0D $40 onboarding cost and $10 location cost for each HP0D**. It is ready to use for Helium, user only needs to input HNT wallet address and use QR Code to onboarding HP0D when it arrives.
50 50  )))
51 -)))
52 -)))
53 53  
54 54  (((
55 -(((
56 -(((
57 57  HP0D has pre-configured standard LoRaWAN frequency bands to use for different countries. Users can also customize the frequency bands to use in their own LoRaWAN network.
58 58  )))
59 -)))
60 -)))
61 61  
37 +== 1.2 Specifications ==
62 62  
63 -===== 1.2 Specifications =====
64 -
65 -(((
66 -(((
67 67  **~ Hardware System:**
68 -)))
69 -)))
70 -
71 -(((
72 -(((
73 73   Linux Part:
74 -)))
75 -)))
76 76  
77 -* (((
78 -(((
79 -Raspberry Pi 4
80 -)))
81 -)))
42 +* Raspberry Pi 4
82 82  
83 -(((
84 -(((
85 85  **~ Interface:**
86 -)))
87 -)))
88 88  
89 -* (((
90 -(((
91 -10M/100M RJ45 Ports x 1
92 -)))
93 -)))
94 -* (((
95 -(((
96 -LoRaWAN Wireless
97 -)))
98 -)))
99 -* (((
100 -(((
101 -Power Input: 12V 2A, DC
102 -)))
103 -)))
46 +* 10M/100M RJ45 Ports x 1
47 +* LoRaWAN Wireless
48 +* Power Input: 12V 2A, DC
104 104  
105 -(((
106 -(((
107 107  **~ Operating Condition:**
108 -)))
109 -)))
110 110  
111 -* (((
112 -(((
113 -Work Temperature: -20 ~~ 65°C
114 -)))
115 -)))
116 -* (((
117 -(((
118 -Storage Temperature: -20 ~~ 65°C
119 -)))
120 -)))
121 -* (((
122 -(((
123 -Power Input: 12V 2A, DC
124 -)))
125 -)))
52 +* Work Temperature: -20 ~~ 65°C
53 +* Storage Temperature: -20 ~~ 65°C
54 +* Power Input: 12V 2A, DC
126 126  
127 -===== 1.3 Features =====
56 +== 1.3 Features ==
128 128  
129 129  * Open-Source Linux system
130 130  * RPi4 with 2G /4G or 8G RAM
... ... @@ -141,146 +141,56 @@
141 141  * Include prepaid $40 onboarding cost and $10 location cost.
142 142  * [[Remote.it remote management>>url:https://wiki.dragino.com/index.php?title=Reverse_SSH_Access#Use_Remote.it_service]].
143 143  
144 -===== 1.4 Label info and login name =====
73 +== 1.4 Label info and login name ==
145 145  
146 -
147 147  [[image:1651803959860-394.png||height="500" width="375"]]
148 -
149 -(((
150 -(((
151 151  **Label information:**
152 -)))
153 -)))
154 -
155 -(((
156 -(((
157 -**Device host name:**      (% class="mark" %)dragino-xxxxxx
158 -)))
159 -)))
160 -
161 -(((
162 -(((
163 -**Band**:  US915/AU915/AS923_1-AS923_4/KR920/EU868/IN865/RU864
164 -)))
165 -)))
166 -
167 -(((
168 -(((
169 -**Miner animal name**: xxx-xxx-xxx
170 -)))
171 -)))
172 -
173 -(((
174 -(((
175 -**Miner address**:          112xxxxxx
176 -)))
177 -)))
178 -
179 -(((
180 -(((
77 +**Device host name:**    (% class="mark" %)dragino-xxxxxx
78 +**Band**:  US915/AU915/AS923_1-AS923_4/KR920/EU868/IN865/RU864
79 +**Miner animal name**: xxx-xxx-xxx
80 +**Miner address**:       112xxxxxx
181 181  **Eth MAC address**: A8: 40: 41: EF: FE: CD
182 -)))
183 -)))
82 +**Login**:  root/d59f2d5b (the root is the Login account for the Web-UI and SSH.(%%))
83 +**SN**:  device serial number.
184 184  
185 -(((
186 -(((
187 -**Login**:  root/d59f2d5b ((% class="mark" %)the root is the Login account for the Web-UI and SSH.(%%))
188 -)))
189 -)))
85 += 2. Quick Start & Onboarding =
190 190  
191 -(((
192 -(((
193 -**SN**:  device serial number.
194 -)))
195 -)))
196 -
197 -
198 -==== 2. Quick Start & Onboarding ====
199 -
200 -(((
201 -(((
202 202  The HP0D is configured as a Wi-Fi Access Point by factory default. You can access and configure the HPD after connecting to its Wi-Fi network, or via its WAN Ethernet port.
203 -)))
204 -)))
205 205  
206 -(% class="wikigeneratedid" id="H-2" %)
207 -(((
208 -
209 -)))
89 +== 2.1  Connect HP0D Web UI ==
210 210  
211 -===== 2.1  Connect HP0D Web UI =====
91 +=== 2.1.1 via HP0D’s Access Point ===
212 212  
213 -====== 2.1.1 via HP0D’s Access Point. ======
214 -
215 -(((
216 -(((
217 217  At the first boot of HP0D, it will auto generate a Wi-Fi network
218 218  
219 219  [[image:1651804327535-321.png||height="325" width="199"]]
220 -)))
221 -)))
222 222  
223 -(((
224 -(((
225 -
226 -)))
227 -)))
228 -
229 -(((
230 -(((
231 231  (% class="box infomessage" %)
232 -(((
233 - called           : **//HPD-dragino-xxxxxx//**
234 -)))
235 -)))
236 -)))
98 + called           : **//HPD-dragino-xxxxxx//**
237 237  
238 -(((
239 -(((
240 240  (% class="box infomessage" %)
241 -(((
242 - with password:  **//dragino+dragino//**
243 -)))
244 -)))
245 -)))
101 + with password:  **//dragino+dragino//**
102 +You can use a PC to connect to this Wi-Fi network. The PC will get an IP address 10.130.1.xxx and the HP0D has the default  IP 10.130.1.1
246 246  
247 -(((
248 -(((
249 - You can use a PC to connect to this Wi-Fi network. The PC will get an IP address 10.130.1.xxx and the HP0D has the default  IP 10.130.1.1
250 -)))
251 -)))
104 +[[image:1651804397792-591.png||height="386" width="733"]]
252 252  
253 -[[image:1651804397792-591.png||height="402" width="763"]]
254 254  
107 +=== 2.1.2 Connect via HP0D hostname ===
255 255  
256 -====== 2.1.2 Connect via HP0D hostname ======
257 -
258 -(((
259 259  Connect the HP0D Ethernet port to your router and HP0D will obtain an IP address. If your PC(Windows/Mac/Ubuntu) connect the same network with the HP0D, you can access the HP0D Web-UI via HP0D’s hostname.
260 -)))
261 261  
262 262  Like: __**//http:~/~/dragino-4ba54a//**__
263 263  
264 264  [[image:1651804629009-699.png]]
265 265  
115 +=== 2.1.3 Connect via Ethernet Port ===
266 266  
267 -====== 2.1.3 Connect via Ethernet Port ======
268 -
269 -(((
270 -(((
271 271  Connect the HP0D Ethernet port to your router and HP0D will 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 HP0D.
272 -)))
273 -)))
274 -
275 -(((
276 276  If you get the IP address form route, like~:// (% class="mark" %)**10.130.2.42**(%%),// you can use this IP address to connect the WEB UI or SSH access of HP0D.
277 -)))
278 -
279 279  [[image:1651804782523-623.png]]
280 280  
121 +== 2.2 Generate QR Code ==
281 281  
282 -===== 2.2 Generate QR Code =====
283 -
284 284  (((
285 285  Go to **Miner** ~-~-> **QR Generate**, input your Helium Wallet Address, and click Generate.
286 286  )))
... ... @@ -292,7 +292,7 @@
292 292  [[image:image-20220506140312-1.png||height="435" width="438"]]
293 293  
294 294  
295 -===== 2.3 Onboarding Hotspot =====
134 +== 2.3 Onboarding Hotspot ==
296 296  
297 297  (((
298 298  ~1. Download the Helium Hotspot APP from the Apple or Google Play store.
... ... @@ -300,8 +300,6 @@
300 300  
301 301  (((
302 302  Note: the APP version need to be greater than 3.11.
303 -
304 -
305 305  )))
306 306  
307 307  (((
... ... @@ -308,24 +308,29 @@
308 308  2. To add a hotspot, select “Hotspot”. On this tab, click the ‘+ Add Hotspot’ in the mid where choose the ‘DRAGINO Miner HP0D’
309 309  )))
310 310  
311 - [[image:1651817186037-899.png||height="429" width="206"]] [[image:1651817194458-938.png||height="434" width="203"]]
148 + [[image:1651817186037-899.png||height="429" width="206"]] [[image:1651817194458-938.png||height="434" width="203"]]
312 312  
313 -
314 314  3. Scan the QR Code you generated in the previous step.
315 315  
316 316  [[image:1651828211026-220.png||height="405" width="191"]]
317 317  
318 -
154 +(((
319 319  4. Onboarding your device
156 +)))
320 320  
321 -Mobile APP will get info from onboarding server. If MAC address doesn’t appear, it means the network connection of mobile to onboarding server might have issue.  [[image:image-20220506141159-2.png||height="422" width="202"]] [[image:1651817529289-461.png||height="423" width="199"]] [[image:1651828250802-391.png||height="421" width="197"]] [[image:1651828262668-768.png||height="416" width="196"]](% style="display:none" %)
158 +(((
159 +Mobile APP will get info from onboarding server. If MAC address doesn’t appear, it means the network connection of mobile to onboarding server might have issue.  
160 +)))
322 322  
162 +[[image:image-20220506141159-2.png||height="422" width="202"]] [[image:1651817529289-461.png||height="423" width="199"]]
323 323  
164 + [[image:1651828250802-391.png||height="421" width="197"]] [[image:1651828262668-768.png||height="416" width="196"]](% style="display:none" %)
165 +
324 324  5. Check onboarding status
325 325  
326 326  You can check from mobile:
327 327  
328 - [[image:1651828391664-884.png||height="413" width="197"]] [[image:1651828401011-970.png||height="412" width="193"]](% style="display:none" %)
170 + [[image:1651828391664-884.png||height="413" width="197"]] [[image:1651828401011-970.png||height="412" width="193"]](% style="display:none" %)
329 329  
330 330  You can also see the hotspot status in below link:
331 331  
... ... @@ -338,7 +338,7 @@
338 338  [[image:1651828427715-679.png||height="374" width="635"]]
339 339  
340 340  
341 -===== 2.4 Set the Port Forwarding =====
183 +== 2.4 Set the Port Forwarding ==
342 342  
343 343  (((
344 344  Helium Hotspots may not work if the Hotspot is behind a firewall or uses an incompatible NAT type. Other times it may be because of a router configuration or the internet is offline. This article aims to help resolve any issues you may have.
... ... @@ -362,28 +362,26 @@
362 362  [[https:~~/~~/www.youtube.com/watch?v=GKusVC7ovrE>>url:https://www.youtube.com/watch?v=GKusVC7ovrE]]
363 363  )))
364 364  
207 += 3. Check the configuration of HP0D =
365 365  
366 -==== 3. Check the configuration of HP0D ====
209 +== 3.1 LoRa frequency configuration ==
367 367  
368 -===== 3.1 LoRa frequency configuration =====
369 -
370 370  [[image:1651828687205-178.png||height="323" width="657"]]
371 371  
213 +== 3.2 Check the LoRaWAN serveraddress ==
372 372  
373 -===== 3.2 Check the LoRaWAN serveraddress =====
374 -
375 375  [[image:1651828703680-156.png||height="349" width="672"]]
376 376  
217 +== 3.3 Check Miner configuration ==
377 377  
378 -===== 3.3 Check Miner configuration =====
379 -
380 380  [[image:image-20220506181408-1.png||height="451" width="513"]]
381 381  
382 -**Note: Check the Region and Height, the default height is greater than 1, if it is 1 please Click the mid button of Update, and then wait 10mins to check here,**
221 +(((
222 +**Note: Check the Region and Height, the default height is greater than 1, if it is 1 please Click the mid button of Update, and then wait 10mins to check here.**
223 +)))
383 383  
225 += 4. Installation of Antenna =
384 384  
385 -==== 4. Installation of Antenna ====
386 -
387 387  (((
388 388  HP0D use Fiber Glass Antenna.
389 389  )))
... ... @@ -402,7 +402,7 @@
402 402  [[image:1651832205608-998.png||height="349" width="198"]]
403 403  )))
404 404  
405 -==== 5. SSH Access for Linux console ====
245 += 5. SSH Access for Linux console =
406 406  
407 407  (((
408 408  IP address:  IP address of HP0D or hostname of HP0D (Such as dragino-63920a)
... ... @@ -424,74 +424,69 @@
424 424  After logging in, you will be in the Linux console and can enter commands as shown below.
425 425  )))
426 426  
427 -[[image:1651832284160-991.png]]
267 +[[image:1651832284160-991.png||height="171" width="729"]]
428 428  
269 += **6. How to change the Wireless function of HP0D** =
429 429  
430 -==== **6. How to change the Wireless function of HP0D** ====
431 -
432 432  The wireless function is configured as AP by default and the web page does not support configuration, if you want to configure it as client connection mode, you need to configure it manually in Linux CIL.
433 433  
434 -===== **6.1 Access the Linux console.** =====
273 +== **6.1 Access the Linux console.** ==
435 435  
436 436  Follow the previous step of Step 5.
437 437  
277 +== 6.2 Install the package of network-manager ==
438 438  
439 -===== 6.2 Install the package of network-manager. =====
440 -
441 441  Run commands:
442 442  
443 443  (% class="box infomessage" %)
444 444  (((
445 - apt update
446 - apt install network-manager
283 + apt update
284 + apt install network-manager
447 447  )))
448 448  
449 -[[image:image-20220507140730-1.png]]
287 +[[image:image-20220507140730-1.png||height="402" width="728"]]
450 450  
289 +== 6.3 Reboot the device ==
451 451  
452 -===== 6.3 Reboot the device. =====
453 -
454 454  Run command:
455 455  
456 456  (% class="box infomessage" %)
457 457  (((
458 - reboot
295 + reboot
459 459  )))
460 460  
461 461  [[image:image-20220507140814-2.png]]
462 462  
463 -===== 6.4 Check the wireless type =====
300 +== 6.4 Check the wireless type ==
464 464  
465 465  Run command:
466 466  
467 467  (% class="box infomessage" %)
468 468  (((
469 - iw dev
306 + iw dev
470 470  )))
471 471  
472 472  [[image:image-20220507140941-3.png]]
473 473  
474 -===== 6.5 Connect the WiFi. =====
311 +== 6.5 Connect the WiFi ==
475 475  
476 476  Run command:
477 477  
478 478  (% class="box infomessage" %)
479 479  (((
480 - nmtui
317 + nmtui
481 481  )))
482 482  
483 483  [[image:image-20220507140953-4.png]]
484 484  
322 += 7. Trouble Shootings =
485 485  
486 -==== 7. Trouble Shootings ====
324 +== 7.1 How to get a wallet address? ==
487 487  
488 -===== 7.1 How to get a wallet address? =====
489 -
490 490  Download the helium Hotspots APP on the Apple or Google Play store to generate own wallet.
491 491  
328 +== 7.2 Onboarding ~-~- Unable to access Web-UI ~-~-> Miner ==
492 492  
493 -===== 7.2 Onboarding ~-~- Unable to access Web-UI ~-~-> Miner =====
494 -
495 495  (((
496 496  User can login the HP0D, able to access other Web Pages except miner page.
497 497  )))
... ... @@ -500,98 +500,107 @@
500 500  If you first boot the device where you need to wait for 10 mins for initialization connection to Helium server.
501 501  )))
502 502  
338 +== 7.3 Onboarding ~-~- Some parameters in miner page show timeout ==
503 503  
504 -===== 7.3 Onboarding ~-~- Some parameters in miner page show timeout =====
505 -
506 506  [[image:image-20220506182042-2.png||height="250" width="516"]]
507 507  
508 508  [[image:1651832455372-647.png||height="224" width="520"]]
509 509  
510 -HP0D is establish connection to Helium server and not finished. And you might see above.It might relate to the network where might up to 10mins.
344 +HP0D is establish connection to Helium server and not finished. And you might see above.
511 511  
346 +It might relate to the network where might up to 10mins.
512 512  
513 -===== 7.4 Onboarding – Bad Gaterway =====
348 +== 7.4 Onboarding – Bad Gaterway ==
514 514  
515 515  [[image:1651832583790-633.png]]
516 516  
517 517  This is caused by the process leads too long which just need to refresh the page.
518 518  
354 +== 7.5 Onboarding ~-~- Why did QR Code generate is aways fail? ==
519 519  
520 -7.5 Onboarding ~-~- Why did QR Code generate is aways fail?
521 -
522 522  [[image:image-20220506182424-3.png]]
523 523  
358 +(((
524 524  This may be related to the current block height, if the device is synchronizing to the latest height or if the device block height is much lower than the current height as the above picture like '1 1', the QR code generation may fail.
360 +)))
525 525  
362 +== 7.6 Onboarding ~-~- Why is the QR Code not quite the same as the manual? ==
526 526  
527 -===== 7.6 Onboarding ~-~- Why is the QR Code not quite the same as the manual? =====
528 -
529 529  [[image:1651832742262-209.png||height="297" width="365"]]
530 530  
366 +(((
531 531  Please ensure that you enter the correct wallet address and that your network is up and running, the user can click the button of ‘Clean’ to re-generate the QR Code.
368 +)))
532 532  
370 +== 7.7 Onboarding – MAC address is ‘Unknown’ after scan QR Code ==
533 533  
534 -===== 7.7 Onboarding – MAC address is ‘Unknown’ after scan QR Code =====
535 -
536 536  [[image:1651832811038-780.png||height="462" width="216"]]
537 537  
374 +(((
538 538  If you see the MAC Address shows the ‘Unknown’ where is due to the provision error,please contact us to help you solve.
376 +)))
539 539  
378 +== 7.8 Onboarding – MAC address is being refreshed after scan QR Code ==
540 540  
541 -===== 7.8 Onboarding – MAC address is being refreshed after scan QR Code =====
542 -
380 +(((
543 543  After scan QR Code, Mobile APP will connect Helium onboarding server and provide the public key/ wallet address to onboarding server. Server will return the match MAC address for this hotspot.
382 +)))
544 544  
384 +(((
545 545  If you don’t see MAC address, make sure your mobile has good internet connection.
386 +)))
546 546  
547 547  [[image:1651832880009-473.png]]
548 548  
390 +== 7.9 HP0D Web ~-~-> Miner ~-~-> Version shows ‘short’ ==
549 549  
550 -===== 7.9 HP0D Web ~-~-> Miner ~-~-> Version shows ‘short’ =====
551 -
552 552  This is caused by the server connection delay, which does not affect the normal use.
553 553  
554 554  [[image:1651832959907-357.png]]
555 555  
396 +== 7.10 Mobile APP crash after scan the QR Code? ==
556 556  
557 -===== 7.10 Mobile APP crash after scan the QR Code? =====
558 -
559 559  * Make sure you have input the correct Wallet address to generate QR Code.
560 560  * Make sure your mobile app uses the same wallet address as the one to generate QR Code.
561 561  * Make sure your mobile app’s relevant permission are enabled.
562 562  * Known: The Android 11 version may cause this kind of issue.
563 563  
403 +== 7.11 Why the frequency/region is not the same what I purchased? ==
564 564  
565 -===== 7.11 Why the frequency/region is not the same what I purchased? =====
566 -
405 +(((
567 567  Each HP0D is inspected and configured prior to shipping.
407 +)))
568 568  
409 +(((
569 569  If your HP0D Web-UI – Miner region is not the same with the shell labels, please contact our support team that will solve this issue for you.
411 +)))
570 570  
413 +== 7.12 Can use the frequency to a region where is not support? ==
571 571  
572 -===== 7.12 Can use the frequency to a region where is not support? =====
415 +(((
416 +Please make sure that the region supports this frequency, you can confirm the appropriate frequency through this link:
417 +)))
573 573  
574 -Please make sure that the region supports this frequency, you can confirm the appropriate frequency through this link
575 -
419 +(((
576 576  [[https:~~/~~/docs.helium.com/lorawan-on-helium/frequency-plans>>url:https://docs.helium.com/lorawan-on-helium/frequency-plans]]
421 +)))
577 577  
423 +== 7.13 Can change the frequency of the HP0D Miner? ==
578 578  
579 -===== 7.13 Can change the frequency of the HP0D Miner? =====
580 -
581 581  We do not recommend doing this, it may damage your device
582 582  
427 += 8. Supports =
583 583  
584 -==== 8. Supports ====
429 +(((
430 +If you are experiencing issues and can’t solve, you can send mail to [[support@dragino.com>>mailto:support@dragino.com]].
431 +)))
585 585  
586 -If you are experiencing issues and can’t solve, you can send mail to
587 -
588 -[[support@dragino.com>>mailto:support@dragino.com]]
589 -
433 +(((
590 590  With your question as detail as possible. We will reply and help you in the shortest.
435 +)))
591 591  
437 += 9. Order Info =
592 592  
593 -==== 9. Order Info ====
594 -
595 595  **HP0D-XXX**
596 596  
597 597  **XXX**: Frequency Band
... ... @@ -599,30 +599,46 @@
599 599  * 868: For Bands: EU868,IN865
600 600  * 915: For Bands: US915,AU915,AS923,KR920
601 601  
446 += 10. Manufacturer Info =
602 602  
603 -==== 10. Manufacturer Info ====
604 -
448 +(((
605 605  **Shenzhen Dragino Technology Development co. LTD**
450 +)))
606 606  
452 +(((
607 607  Room 202, Block B, BCT Incubation Bases (BaoChengTai),  No.8 CaiYunRoad
454 +)))
608 608  
456 +(((
609 609  LongCheng Street, LongGang District ; Shenzhen 518116,China
458 +)))
610 610  
460 += 11. FCC Warning =
611 611  
612 -==== 11. FCC Warning ====
613 -
462 +(((
614 614  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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615 615  
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616 616  ~-~- Reorient or relocate the receiving antenna.
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617 617  
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618 618  ~-~- Increase the separation between the equipment and receiver.
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619 619  
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620 620  ~-~- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
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621 621  
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622 622  ~-~- Consult the dealer or an experienced radio/TV technician for help.
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623 623  
624 -
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625 625  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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626 626  
627 -
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628 628  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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