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I'm looking for a gateway to pass from a 6LoWPAN over 802.15.4 network to 3G. Are there any on the market, or do I have to build one for myself based on Arduino or Raspberry Pi?

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    Can you elaborate a bit on the use case you're trying to build? – Helmar Feb 13 '17 at 17:23
  • What hardware do you currently have in your network (particularly your edge router)? – Aurora0001 Feb 13 '17 at 17:26
  • Right now I have a couple of sensortag and as edge router a weptech gateway connected to my laptop by SLIP. This Gateway will not be near any computer so I have to change SLIP for a wireless (very long range) protocol. I though 3G would a good option. – JuanMa Feb 14 '17 at 18:04
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I think you will find modules without too much trouble, there have been chips around for over a year that I found (and there is a module on Kickstarter which looks like a simple small production run sales testing exercise).

A 6LoWPAN to 3G gateway is probably a bit of an esoteric use case - any you can find will be built-in to an end product, so it might be cheaper to assemble a unit from modules (or re-purpose an old phone maybe depending on the scenario).

Just to elaborate on the 'how' part, it seems to be common now for these radio interfaces to be integrated with a reasonably powerful MCU which handles the communication stack. Not just the link-layer, but some of the security aspects of the protocol too. So this would easily be able to interface to a GSM module through a UART, without needing a further processing device. Building the radio stand-alone would actually be harder than having it tightly integrated with a control processor. You should also be wary of trying to use the asic directly on your own board - using a module removes the challenge of RF layout and type approval.

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  • Thank you for the answer. I think I will follow your advice trying to build it with a pair of modules for Arduino or RaspBerry. However due to the wide options of gateway on the market I found strange not to have one with this two protocols which costs does not exceed too much. – JuanMa Feb 14 '17 at 18:00

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