It is being used as a standard for nowadays in our cell phone. Over countries and 2 billion people are using it as a phone today. Most likely it is operating in the MHz toMHz band. It comes with the following features:. Uses AT Command Set. Single board solution.
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It is being used as a standard for nowadays in our cell phone. Over countries and 2 billion people are using it as a phone today. Most likely it is operating in the MHz toMHz band. It comes with the following features:. Uses AT Command Set. Single board solution. Power with VDC. Ready with UART 2. Serial Interface, Baud rate: bps, N Onboard 3. On the backside, we also see that we need a SIM card. I recommend a simple prepaid card you could put it in the board like this but it makes things a bit easier later on if we first put it in a smartphone to remove the SIM lock.
Afterward, we can insert the card into the holder on the board and lock it in place. Please do not try other pins! We have to press the button on the right side of the RS port to start the login process to the mobile network. When the status LED blinks shortly every 2 to 3 seconds then you know that the module is connected successfully but this button itself is not practical if you want to automate something with a microcontroller so I used my multimeter to find out that the left side of the switch is ground and the right side is connected to the module as an input.
Whenever the right side connects to ground, the login process begins. I solved this by soldering a jumper wire to the right side of the switch which connects to pin DO10 of the Arduino Uno check the schematic on Figure 1.
Whenever this pin goes low, the login process starts. The board then draws around 13 milliamps while being in this state. Even though TC 35 uses 3. Baud rate is and carriage return is selected. The module uses simple AT commands to communicate. All of those are listed in the AT command reference.
That means it works or I can get some other basic information like my network operator or the signal strength. The wiring is super easy again check out the schematic. This sketch here showcased the method of sending SMS pretty good.
I just open the serial monitor which pulls the startup switch low then I can enter my SMS and finish it with a dot at the end. Now the program does all the work by itself and you receive the SMS on the smartphone with the number you entered in the code. Now you can, of course, adapt the code to fit your needs you basically just need the function SendTextMessage all the other stuff are just gimmicks.
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board GSM SIEMENS TC35 SMS Wireless Module UART/232 dev
The module has a reasonable power consumption of approximately mA during calls and mA when idle with SIM card registered on the network. This article will summarize my experiment with this GSM module and describes some interesting findings. The module has four 2. The onboard MAX is connected directly to the 5V power supply while the rest of the board works with 3. The onboard battery sockets also have some pins reserved for connection to external RTD sensors for battery temperature measurements. This makes sure all signals having the same ground reference. Upon applying power, the reset switch on the board must be pressed to power up the module.
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