**Getting Started with the ZEMAN'S Quad-Core GSM Module Board**

The board I'm using is relatively inexpensive, costing $23 on eBay, and I was able to find a cheaper option for $18 from another seller. However, I chose this one because ZEMAN's is a well-known company that produces high-quality and functional products.

**Understanding the Board Components**

Upon examining the board, we can see that it's composed of a Chinese-made module with a QDC jack, which suggests that the board around the module itself might be from China. The SIM card slot is also present, and I recommend using a simple prepaid card to insert into the board.

**Powering the Board**

To power the board, we can use the DC jack or the VCC and ground pins on the board. It's essential not to try other pins, as they may not be suitable for the module. I recommend using 5 volts because the MAX232 IC, which is necessary for communication with the module through our RS-232 port, is directly connected to VCC and ground.

**Login Process**

When we press the button on the board, it starts the login process to the mobile network. The status LED blinks shortly every 2 to 3 seconds when the module connects successfully. However, this button may not be practical for automating processes 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.

**Automating the Login Process**

To automate the login process, I soldered a jumper wire to the right side of the switch, which connects to pin 10 of the Arduino Uno. Whenever this pin goes low, the login process begins. The board then draws around 6 milliamps while in this state.

**Testing with FTDI Breakouts**

To test the module, we can use FTDI breakouts. I connected TX to RX, D0 to D0, and ground to ground on both devices. Although the TC-35 uses 3.3 volts logic levels, it's compatible with the 5V signals of the FTDI and Arduino.

**Sending SMS Messages**

To send SMS messages using the module, we can open the serial monitor in the Arduino software and select the port of the FTDI chip. We can then enter an SMS message and finish it with a dot at the end. The program will do all the work by itself, and we'll receive the SMS on our smartphone with the number entered in the code.

**Future Project: Alarm System**

In a future video, I'll show you how to use the sport to build an alarm system that notifies you via SMS when something triggers it.

**Conclusion**

This article provides a comprehensive overview of the ZEMAN'S Quad-Core GSM Module Board, including its components, powering options, login process, and automation capabilities. We've also explored testing with FTDI breakouts and sending SMS messages using the module. Stay tuned for future projects!

WEBVTTKind: captionsLanguage: enin this video I will show you how to handle a TC 35 GSM module properly and also how to send SMS will fit by the use of an Arduino Uno let's get started first of all this board is relatively cheap I got mine for $23 from eBay and I only found one that is even cheaper with 18 bucks but I went with this one because Zeman's is a well-known company that produces pretty decent and functional stuff the board around the module itself is I think Chinese those beautiful solo joints and this QDC jack just gives it away 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 firstly put it in a smartphone to remove the sim lock afterwards we can insert the card into the hold on the board and lock it in place now we need to power the board we can use the DC jack or the VCC and ground pins on the board please do not try other pins I recommend 5 volts because the max 232 I see here which is necessary to communicate with the module through our rs-232 port is directly connected to VCC and ground there is no voltage regulator for it but the IC can only enjoy a maximum of 6 volts so if you want to use 12 volts which is possible because the module uses 3.3 volts from a voltage regulator you would have to remove the max to 3-2 before powering it and you also save some power if you remove it that is why I recommend it if you don't use the rs-232 port the board's draws around 6 milliamps in standby mode but it's not ready for action yet we have to press this button which starts the login process to the mobile network when the status LED blinks shortly every 2 to 3 seconds then you know that the module connected successfully but this button itself is not practical if you want to automate something with a micro controller 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 10 of the Arduino Uno whenever this pin goes low the login process starts the board then draws around protein milliamps while being in the state now let's do a first test with the FTDI breakouts I connect TX to TX d 0 and rx to RX d0 I know it is backwards because you usually connect transmit to receive and the other way around but here they just messed up the labeling for the pins and of course ground to ground that way our signal has the same ground reference even though the TC 35 uses 3.3 volts logic levels it is compatible with the pipe wall signals of the FTDI and Arduino do not worry about that I start the Arduino software select the port of the FTDI chip and open the serial monitor baud rate is 9600 and carriage return is selected the module uses simple 80 commands to communicate all of those are listed in the 80 command reference for example if I type in 80 I get in okay that means it works or I can get some other basic information like my network operator or the signal strength now let's move this to the Arduino the wiring is super easy and I even made a small schematic for you 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 don't forget that dots know the program does all the work by itself and you receive their sum S on the smartphone with the number you entered in the code you can change this number here and know this is not my real one this format begins with number 49 for Germany and then my usual number but without the zero at the beginning now you can of course adapt the codes to fit your needs you basically just need the function send text message all the other stuff or just gimmicks I will show you how I use the sport to build an alarm system which notifies you via SMS in a future video until then be sure to LIKE share and subscribe you can find the sketch schematic and links to the board in the video description stay creative and I will see you next timein this video I will show you how to handle a TC 35 GSM module properly and also how to send SMS will fit by the use of an Arduino Uno let's get started first of all this board is relatively cheap I got mine for $23 from eBay and I only found one that is even cheaper with 18 bucks but I went with this one because Zeman's is a well-known company that produces pretty decent and functional stuff the board around the module itself is I think Chinese those beautiful solo joints and this QDC jack just gives it away 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 firstly put it in a smartphone to remove the sim lock afterwards we can insert the card into the hold on the board and lock it in place now we need to power the board we can use the DC jack or the VCC and ground pins on the board please do not try other pins I recommend 5 volts because the max 232 I see here which is necessary to communicate with the module through our rs-232 port is directly connected to VCC and ground there is no voltage regulator for it but the IC can only enjoy a maximum of 6 volts so if you want to use 12 volts which is possible because the module uses 3.3 volts from a voltage regulator you would have to remove the max to 3-2 before powering it and you also save some power if you remove it that is why I recommend it if you don't use the rs-232 port the board's draws around 6 milliamps in standby mode but it's not ready for action yet we have to press this button which starts the login process to the mobile network when the status LED blinks shortly every 2 to 3 seconds then you know that the module connected successfully but this button itself is not practical if you want to automate something with a micro controller 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 10 of the Arduino Uno whenever this pin goes low the login process starts the board then draws around protein milliamps while being in the state now let's do a first test with the FTDI breakouts I connect TX to TX d 0 and rx to RX d0 I know it is backwards because you usually connect transmit to receive and the other way around but here they just messed up the labeling for the pins and of course ground to ground that way our signal has the same ground reference even though the TC 35 uses 3.3 volts logic levels it is compatible with the pipe wall signals of the FTDI and Arduino do not worry about that I start the Arduino software select the port of the FTDI chip and open the serial monitor baud rate is 9600 and carriage return is selected the module uses simple 80 commands to communicate all of those are listed in the 80 command reference for example if I type in 80 I get in okay that means it works or I can get some other basic information like my network operator or the signal strength now let's move this to the Arduino the wiring is super easy and I even made a small schematic for you 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 don't forget that dots know the program does all the work by itself and you receive their sum S on the smartphone with the number you entered in the code you can change this number here and know this is not my real one this format begins with number 49 for Germany and then my usual number but without the zero at the beginning now you can of course adapt the codes to fit your needs you basically just need the function send text message all the other stuff or just gimmicks I will show you how I use the sport to build an alarm system which notifies you via SMS in a future video until then be sure to LIKE share and subscribe you can find the sketch schematic and links to the board in the video description stay creative and I will see you next time