Coder's Talk

When working with SBC or Single Board Computer for embedded project, we can't have full RS-232 serial with all 9 pin signal compatibility at all times. For instance, while I'm working with TS-7260 board from Technologic Systems, the COM3 serial interface have only 3 pin which is RX, TX and GND. So, in order to make my Wavecom GSM/GPRS/EDGE modem working, I have to create my own cable pinout to connect the 15 pin connector on the Wavecom Modem to the 3 pin RS-232 serial interface on the board. Before creating the cable, I did some search and find this cable pinout from Wavecom GSM Modem manual. Pin Description 1 DCD (Data Carrier Detect) 2 TXD (Transmit Data) 3 Reserved 4 MICROPHONE (+) 5 MICROPHONE (-) 6 RXD (Receive Data) 7 DSR (Data Set Ready) 8 DTR (Data Terminal Ready) 9 GND(Signal Ground) 10 SPEAKER (+) 11 CTS (Clear To Send) 12 RTS (Request To Send) 13 RI (Ring Indicator) 14 RESET 15 SPEAKER (-) and the pinout from TS-7260 Board manual: 5.6 C...

Since I'm working on remote automation system development, I've been playing a lot with this Wavecom GSM Modem on my development since I use it for GPRS connection. The issue is, when I use a new SIM card, sometimes that SIM card have pin number which make the modem locked and cannot dial or connect to the internet via GPRS until I unlock the GSM Modem by issuing the pin number. That was annoying when you have put the pin number every time it is booting while you suppose to just leave this device to work and connect automatically. Actually, in order to fix this issue, I can just disable the SIM card pin. So, I would like to share my routine with new SIM card with pin number, assuming you knew some AT+Command basic and how to use it. Here's how to disable your SIM card pin via Wavecom Meastro, Fastrack or any compatible GSM modems: Connect your modem to your computer. Open up serial terminal. I'm using minicom coz I'm on Linux box. On Windows, you can use HyperTerm...