ESP8266 Developer Zone

Re: Cheap module to build a 3G/Wifi hotspot?

2016-10-02T12:43:03+08:00

I understand, you mean you just need the ESP8266 to forward the information, in which case bandwidth and buffering memory is all that matters.
But I answered with the assumption that the 3G module will almost certainly not understand and directly forward the information received by the ESP8266 from a phone. That is, the protocol between the (3G module and ESP8266) and (ESP8266 and a phone) would usually be too different to directly make a bridge... not sure if I know a module that could do this by directly accepting low level frames.

Statistics: Posted by Guest — Sun Oct 02, 2016 12:43 pm

Re: Cheap module to build a 3G/Wifi hotspot?

2016-09-25T15:02:35+08:00

I'm not sure if you understand how encryption like tls works (no offence), but the only parties involved in encrypting/decrypting data are the server and the client. To a hub/switch or proxy it is not relevant if the data is encrypted or not.

Statistics: Posted by NopItTwice — Sun Sep 25, 2016 3:02 pm

Re: Cheap module to build a 3G/Wifi hotspot?

2016-09-25T11:51:10+08:00

Hello,
The ESP8266 is capable of all networking operations. The only limitation is when the ESP8266 is used to transact encrypted data... there isn't enough system resources available for high volume and high speed encryption. Therefore I would not recommend using ESP8266 with a 3G capable device.
The data date you may get from the ESP8266 will most likely be less than 3-4 mbits/sec with all that encryption overhead.
However, the ESP32 can do what you want to do. The cost will be approximately the same as the ESP8266 as well.

Statistics: Posted by Guest — Sun Sep 25, 2016 11:51 am

Cheap module to build a 3G/Wifi hotspot?

2016-09-22T02:50:02+08:00

I have a second SIM card that provides free Internet, but I can't use it in my phone because I only have one SIM slot.

So I want to create a WiFi hotspot using an ESP8266 and make it route all the traffic it receives to a 3G module that holds my second SIM card.

I have a GPRS module that can be controlled through a simple UART serial interface via AT commands (NeoWay M590).
It's only $2, but it's slow (GPRS) and as it turns out the API is pretty limited. TCP/UDP/DNS seem to be the only available protocols.
I really wish I just had a simple module that could take lower level input like Ethernet frames... I mean I just want to use it as proxy anyways so there is no need for it to even understand higher level protocols such as TCP...

Does anyone of you know of a cheap easy to use 3G module that I could use for this case?

I was also thinking about configuring my ESP8266 to use my VPN server (which is configured as TCP), so that all my traffic becomes TCP traffic.
Would that work? Is the ESP8266 capable of VPN?

Statistics: Posted by NopItTwice — Thu Sep 22, 2016 2:50 am