Pankaj21

I am looking for some GOOD library to communicate with a GSM Modem (SIM 900 TTL UART)

Unfortunately all code examples including netduino2seedgsm libraries are simply dumping the AT commands sequentially to showcase SMS/Get/Post examples. Even the modem manuals have the similar examples.

 

While these examples work as demonstrations, but in real time operations they fail because there is hardly any checking for returned response codes, timing, prompts etc.

 

Is there any qualitative library around which can be used. (I don't mind if you point out any which is on some other platform or language, I can do the porting for the community ) but it should cover all standard SMS and GPRS functional needs.

 

Thanks in advance.

 

Pankaj

 

Hi,

 

I have a requirement to add more serial ports (about 12 of them).

Any idea how to implement?

Do we have serial port expanders (something  like MCP23017 etc.)?

And in case we expand ... can that be interrupt driven rather than polling based?

Can we use any analog switches/multiplexers with digital control?

 

Thanks

 

Pankaj

Hi Chris,

 

I have had excellent  success on the Netduino and Netduino plus devices

However, with Netduino Mini I have failed to even communicate with the device

In fact I tried with three different mini devices to rule out that the devices got/were damaged.

 

I guess it has to do something with the wiring of my setup.

Can someone look at my FTDI details and suggest a wiring diagram and test procedure?

 

Thanks in advance

 

Pankaj

Can anyone help me understand how the pins on a Netduino Mini are multiplexed on functionalities? I mean how are the GPIO pins and other functions allocated on the same pins ? Thanks Pankaj