I have connected Raspberry Pi to GSM sim900a mini with the following details:
- convertor max3232 used
- DB9-2 sim900a connected to DB9-3 max3232
- DB9-3 sim900a connected to DB9-2 max3232
- tx (raspberry) connected to tx (max3232)
- rx (raspberry) connected to rx (max3232)
But there's no respond through miniterm.py as I run the command below:
sudo miniterm.py /dev/ttyAMA0
I don't Know why the transfer (send/transfer) is not working.