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The combination of LM2596 (Step-up converter) and LM2577 (Step-down converter) makes this a one of a kind Buck-Boost Converter module
Use the correct SDA and SCL pins on your controller and make sure the bus voltage is compatible
Radiator PCB 
You may need this item- ARPI600
SIM800C GSM/GPRS Shield for Arduino - Cellular motion detection The combination of LM2596 (Step-upGPRS GSM SIM800C Shield for Arduino. The GPRS GSM Shield provides you a way to use the GSM phone network to receive data from a remote locationand it is compatible with all boards which have the same form factor (and pin out) as a standard Arduino Board. This shield can also be applied to DIY phones for calling, receiving and sending messages, making GPS tracker or other applications like Smart home etc. SIM800C GPRS GSM Shield delivers GSM GPRS850
