SIM800C Development Board GSM GPRS Module Support Message bluetooth TTS DTMF Quad-band

Schematic http myosuploads3 banggood com products 20181127 20181127000501SIM800CV2 pdfOverview SIM800C is a quad band GSM GPRS module its performance very stable with small appearance and high cost performance to meet the various needs of customers The operating frequency of SIM800C is GSM GPRS 850 900 1800 1900MHz can be used worldwide you can achieve low power consumption of voice SMS and data transmission can be applied to a variety of design requirements of compact product Features 1 Input voltage range 5V 18V DC 2 Self propelled SIM card slot design support 2G 3G 4G card or small card 3 Module will connected to the network automatically after you power on it 4 Compatible with a variety of single chip serial port 5 Reserved headset and microphone interface 6 Support TTSDTMF function 7 bluetooth 3 0 protocol enhanced bluetooth antenna support for serial port SPP and audio services 8 Reserved lithium battery powered BAT interface you can use 3 7V lithium battery or 18650 lithium battery 9 Reserved IPEX interface SMA interface spring antenna interface can be used on different occasions 10 With work indicator the LED will flash 1 time per second when no network no SIM card or SIM card inserted and will flash 1 time per 3 seconds under normal conditions 11 Board size 40 9 51 3mm Interface description GND Power groundVCC IN Power supply pin input DC5V 20VRI Ring indicatorDTR Data terminal preparationTXD TTL serial port transm