hedehede81
Newbie level 3
Hello everyone,
I have a SIM300 module and I can only access the top of it, bottom is inaccessible. It doesn't have a ready-made serial interface. I would like to access TXD and RXD pins of SIM300 to connect to my COM port. Since I can only access only top, I was wondering any of those round pins is TXD and RXD. I have found an image:
As you can see there is yellow TXD and red RXD round pins. My layout from top is a little different:
Could you please tell me what number is TXD and what number is RXD? Can I solder wires to these round pins and connect to my PC COM port with MAX232 interface?
Thank you very much in advance, I hope I can get this working with your help.
I have a SIM300 module and I can only access the top of it, bottom is inaccessible. It doesn't have a ready-made serial interface. I would like to access TXD and RXD pins of SIM300 to connect to my COM port. Since I can only access only top, I was wondering any of those round pins is TXD and RXD. I have found an image:
As you can see there is yellow TXD and red RXD round pins. My layout from top is a little different:
Could you please tell me what number is TXD and what number is RXD? Can I solder wires to these round pins and connect to my PC COM port with MAX232 interface?
Thank you very much in advance, I hope I can get this working with your help.