As shown in the schematic block diagram below, the project consists of Flame sensor, Arduino Nano & SIM800L GSM ... in the Module. If the LED blinking is delayed as compared to the initial start, it ...

The pin is named VBAT because it is normally power by a Lithium Battery, so if you are using it on portable devices then you can skip the LM2596 circuit and connect it ... I will hook up the GSM ...

Solder the spiral antenna on SIM800L module. Fig. 4: PCB layout of the GSM security switch Fig. 5: Components layout for the PCB shown in Fig. 4 Mount Arduino Nano and SIM800L on the PCB. Connect 5V, ...