Building an LTE Access Point with a Raspberry Pi

Post by kevml » Mon, Jun 24, 2019, 1:52 AM UTC

mindslight wrote: post #23

kevml wrote: post #22

Earlier quoted context omitted.

Yes, we had the FCC (via FBI) knocking on our door within 30 minutes. This was about 10 years ago when we were doing research with an access point.

Sheesh! Do you care to share any more details? How dense of an area? How was it detected? If by "access point" you mean 2.4GHz, what was the actual problem?

Post by Mary-Jane » Mon, Jun 24, 2019, 2:29 AM UTC

KirinDave wrote: post #35

Spivak wrote: post #17

I don't with to diminish the author's work but there's nothing all that special about the LTE portion. From the perspective of the Pi it's just another interface/network. This is more akin to building a basic consumer all-in-one router -- which I think actually sounds cooler. So the pieces that this article puts together: * Bridging the Pi's ethernet and wireless interface and setting up DHCP pointing to a forwarding…

Yeah, I did this myself not long ago as part of a mobile office rig and ... I didn't write about it or share about it becuase it was mostly just putting USB male connectors into USB female connectors and sourcing the right kind of batteries to charge things. Oh, and learning ethernet cables are a monstrous power draw and you're much better off using wifi for everything. I mean, yeah it's cool to have. But I can't hel…

Post by p_l » Mon, Jun 24, 2019, 4:15 AM UTC

voltagex_ wrote: post #39

tjohns wrote: post #20

Not mentioned in the article, but I'd also recommend force-setting DHCP Option 43 to "ANDROID_METERED" to let Android clients know you're on a metered connection (hotspot) instead of a normal landline-based WiFi network. [1] This inhibits some things like automatic updates. I don't know of an equivalent for other OSes, unfortunately. [1]: https://www.lorier.net/docs/android-metered.html

https://apple.stackexchange.com/questions/199163/how-does-io... seems to think it's in the wifi beacon itself for OS X. No detection method appears to be present in Windows 10, it's all geared towards LTE modems integrated in the machine. I really wish this had been standardised.

Post by voltagex_ » Mon, Jun 24, 2019, 4:35 AM UTC

KirinDave wrote: post #35

Spivak wrote: post #17

I don't with to diminish the author's work but there's nothing all that special about the LTE portion. From the perspective of the Pi it's just another interface/network. This is more akin to building a basic consumer all-in-one router -- which I think actually sounds cooler. So the pieces that this article puts together: * Bridging the Pi's ethernet and wireless interface and setting up DHCP pointing to a forwarding…

Yeah, I did this myself not long ago as part of a mobile office rig and ... I didn't write about it or share about it becuase it was mostly just putting USB male connectors into USB female connectors and sourcing the right kind of batteries to charge things. Oh, and learning ethernet cables are a monstrous power draw and you're much better off using wifi for everything. I mean, yeah it's cool to have. But I can't hel…

Post by the_mitsuhiko » Mon, Jun 24, 2019, 5:19 AM UTC

tjohns wrote: post #20

Not mentioned in the article, but I'd also recommend force-setting DHCP Option 43 to "ANDROID_METERED" to let Android clients know you're on a metered connection (hotspot) instead of a normal landline-based WiFi network. [1] This inhibits some things like automatic updates. I don't know of an equivalent for other OSes, unfortunately. [1]: https://www.lorier.net/docs/android-metered.html