Geeetech

Thank you. Now I know how to connect to the psoc.
It might be good to add these details to the documentation.

I wonder why board cannot be connected to computer rs232? Is it the voltages?
My plan is to connect it to psoc so I wanted to first get it to work with Pc.
Is the interface i2c? Or what?

Ok I read through your wiki paper again. No new information.
I configured the serial jumpers for HW usage according to your wiki paper. Therefore I am using D0 and D1 as Rx and Tx.

I attached D0 and D1 directly to my computer serial port COM1. One of the problems I have is it does not say which ...

I am using the SIM900 GPRS modem with the standard windows hyperterminal.
set up 19200 8n1.
tx and rx connected to d0 and d1 (tried both possibilities since I cannot find if d0 or d1 is rx)
attached signal gnd to signal gnd..

attached 12V pwr light on

push pwr button.... netlight blinks every 3 ...