blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html

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   6     <title>Petter Reinholdtsen: A Raspberry Pi based batman-adv Mesh network node</title>
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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <div class="entry">
  23       <div class="title">A Raspberry Pi based batman-adv Mesh network node</div>
  24       <div class="date">21st October 2013</div>
  25       <div class="body"><p>The last few days I have been experimenting with
  26 <a href="http://www.open-mesh.org/projects/batman-adv/wiki">the
  27 batman-adv mesh technology</a>.  I want to gain some experience to see
  28 if it will fit <a href="https://wiki.debian.org/FreedomBox">the
  29 Freedombox project</a>, and together with my neighbors try to build a
  30 mesh network around the park where I live.  Batman-adv is a layer 2
  31 mesh system ("ethernet" in other words), where the mesh network appear
  32 as if all the mesh clients are connected to the same switch.</p>
  33
  34 <p>My hardware of choice was the Linksys WRT54GL routers I had lying
  35 around, but I've been unable to get them working with batman-adv.  So
  36 instead, I started playing with a
  37 <a href="http://www.raspberrypi.org/">Raspberry Pi</a>, and tried to
  38 get it working as a mesh node.  My idea is to use it to create a mesh
  39 node which function as a switch port, where everything connected to
  40 the Raspberry Pi ethernet plug is connected (bridged) to the mesh
  41 network.  This allow me to hook a wifi base station like the Linksys
  42 WRT54GL to the mesh by plugging it into a Raspberry Pi, and allow
  43 non-mesh clients to hook up to the mesh.  This in turn is useful for
  44 Android phones using <a href="http://servalproject.org/">the Serval
  45 Project</a> voip client, allowing every one around the playground to
  46 phone and message each other for free.  The reason is that Android
  47 phones do not see ad-hoc wifi networks (they are filtered away from
  48 the GUI view), and can not join the mesh without being rooted.  But if
  49 they are connected using a normal wifi base station, they can talk to
  50 every client on the local network.</p>
  51
  52 <p>To get this working, I've created a debian package
  53 <a href="https://github.com/petterreinholdtsen/meshfx-node">meshfx-node</a>
  54 and a script
  55 <a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/build-rpi-mesh-node">build-rpi-mesh-node</a>
  56 to create the Raspberry Pi boot image.  I'm using Debian Jessie (and
  57 not Raspbian), to get more control over the packages available.
  58 Unfortunately a huge binary blob need to be inserted into the boot
  59 image to get it booting, but I'll ignore that for now.  Also, as
  60 Debian lack support for the CPU features available in the Raspberry
  61 Pi, the system do not use the hardware floating point unit.  I hope
  62 the routing performance isn't affected by the lack of hardware FPU
  63 support.</p>
  64
  65 <p>To create an image, run the following with a sudo enabled user
  66 after inserting the target SD card into the build machine:</p>
  67
  68 <p><pre>
  69 % wget -O build-rpi-mesh-node \
  70     https://raw.github.com/petterreinholdtsen/meshfx-node/master/build-rpi-mesh-node
  71 % sudo bash -x ./build-rpi-mesh-node > build.log 2>&1
  72 % dd if=/root/rpi/rpi_basic_jessie_$(date +%Y%m%d).img of=/dev/mmcblk0 bs=1M
  73 %
  74 </pre></p>
  75
  76 <p>Booting with the resulting SD card on a Raspberry PI with a USB
  77 wifi card inserted should give you a mesh node.  At least it does for
  78 me with a the wifi card I am using. The default mesh settings are the
  79 ones used by the Oslo mesh project at Hackeriet, as I mentioned in
  80 <a href="http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">an
  81 earlier blog post about this mesh testing</a>.</p>
  82
  83 <p>The mesh node was not horribly expensive either.  I bought
  84 everything over the counter in shops nearby.  If I had ordered online
  85 from the lowest bidder, the price should be significantly lower:</p>
  86
  87 <p><table>
  88
  89 <tr><th>Supplier</th><th>Model</th><th>NOK</th></tr>
  90 <tr><td>Teknikkmagasinet</td><td>Raspberry Pi model B</td><td>349.90</td></tr>
  91 <tr><td>Teknikkmagasinet</td><td>Raspberry Pi type B case</td><td>99.90</td></tr>
  92 <tr><td>Lefdal</td><td>Jensen Air:Link 25150</td><td>295.-</td></tr>
  93 <tr><td>Clas Ohlson</td><td>Kingston 16 GB SD card</td><td>199.-</td></tr>
  94 <tr><td>Total cost</td><td></td><td>943.80</td></tr>
  95
  96 </table></p>
  97
  98 <p>Now my mesh network at home consist of one laptop in the basement
  99 connected to my production network, one Raspberry Pi node on the 1th
 100 floor that can be seen by my neighbor across the park, and one
 101 play-node I use to develop the image building script.  And some times
 102 I hook up my work horse laptop to the mesh to test it.  I look forward
 103 to figuring out what kind of latency the batman-adv setup will give,
 104 and how much packet loss we will experience around the park. :)</p>
 105 </div>
 106
 107       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox</a>, <a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.</div>
 108
 109
 110     </div>
 111
 112
 113
 114
 115     <div id="sidebar">
 116
 117
 118
 119 <h2>Archive</h2>
 120 <ul>
 121
 122 <li>2020
 123 <ul>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 126
 127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 128
 129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 130
 131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/05/">May (1)</a></li>
 132
 133 </ul></li>
 134
 135 <li>2019
 136 <ul>
 137
 138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 139
 140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 141
 142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 143
 144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 145
 146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 157
 158 </ul></li>
 159
 160 <li>2018
 161 <ul>
 162
 163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 164
 165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 166
 167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 168
 169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 170
 171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 172
 173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 184
 185 </ul></li>
 186
 187 <li>2017
 188 <ul>
 189
 190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 191
 192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 193
 194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 195
 196 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 197
 198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 199
 200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 201
 202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 211
 212 </ul></li>
 213
 214 <li>2016
 215 <ul>
 216
 217 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 224
 225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 230
 231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 240
 241 </ul></li>
 242
 243 <li>2015
 244 <ul>
 245
 246 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 251
 252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 253
 254 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 255
 256 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 257
 258 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 259
 260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 261
 262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 263
 264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 265
 266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 269
 270 </ul></li>
 271
 272 <li>2014
 273 <ul>
 274
 275 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 276
 277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 278
 279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 280
 281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 282
 283 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 284
 285 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 286
 287 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 288
 289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 290
 291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 296
 297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 298
 299 </ul></li>
 300
 301 <li>2013
 302 <ul>
 303
 304 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 305
 306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 307
 308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 309
 310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 311
 312 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 313
 314 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 315
 316 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 317
 318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 325
 326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 327
 328 </ul></li>
 329
 330 <li>2012
 331 <ul>
 332
 333 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 334
 335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 336
 337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 338
 339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 340
 341 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 342
 343 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 344
 345 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 346
 347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 348
 349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 354
 355 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 356
 357 </ul></li>
 358
 359 <li>2011
 360 <ul>
 361
 362 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 363
 364 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 365
 366 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 367
 368 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 369
 370 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 371
 372 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 373
 374 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 375
 376 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 377
 378 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 379
 380 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 381
 382 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 383
 384 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 385
 386 </ul></li>
 387
 388 <li>2010
 389 <ul>
 390
 391 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 392
 393 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 394
 395 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 396
 397 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 398
 399 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 400
 401 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 402
 403 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 404
 405 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 406
 407 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 408
 409 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 410
 411 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 412
 413 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 414
 415 </ul></li>
 416
 417 <li>2009
 418 <ul>
 419
 420 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 421
 422 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 423
 424 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 425
 426 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 427
 428 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 429
 430 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 431
 432 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 433
 434 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 435
 436 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 437
 438 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 439
 440 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 441
 442 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 443
 444 </ul></li>
 445
 446 <li>2008
 447 <ul>
 448
 449 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 450
 451 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 452
 453 </ul></li>
 454
 455 </ul>
 456
 457
 458
 459 <h2>Tags</h2>
 460 <ul>
 461
 462  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 463
 464  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 465
 466  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 467
 468  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 469
 470  <li><a href="http://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (8)</a></li>
 471
 472  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (11)</a></li>
 473
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 588  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
 589
 590 </ul>
 591
 592
 593     </div>
 594     <p style="text-align: right">
 595  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 596 </p>
 597
 598   </body>
 599 </html>