I got some photos and schematic for this TC35 GSM board, but I am still not sure which pins to connect to Arduino UNO.
On this photo: https://app.box.com/s/qldx0q0y47kr8sgwwqlj
you can see the following pins: RXD0, TXD0, RXD_MCU, TXD_MCU, RXD_PC, TXD_PC, RXD, TXD, RI, TI. I don't know which pair to use to connect to Arduino's pins 2 and 3.
I read somewhere that I should also connect the ground of GSM shield to the Arduino's GND. The only pin on GSM shield which has a label GND is the one on the top of this photo: to the right of white ON/OFF switch - there you can see two pins - one is VCC and the other is GND. Should I connect this GND to Arduino's GND? On Arduino board there is one GND next to Vin, another next to 5V, and the third one is next to PIN 13.
I also read that I should connect Arduino PIN 7 to GSM shield Reset, but I don't find Reset pin on the GSM shield.
Is it OK if I power the GSM shield with 9V battery?
Here is schematic for this board: https://app.box.com/s/ej4kux0y0i2nqbek4796
And here is another photo: https://app.box.com/s/wdvnazamhzwfuagg0y4x
I read many instructions, but no GSM shiled is the same as mine, I tried hundreds combinations, with softwareSerial library and without it, just trying to communicate with the modem, but no success.