Giới thiệu Bo mạch điện không dây dạng nhỏ nhất SIM800L GPRS GSM tiện dụng
Smallest SIM800L GPRS GSM Module MicroSIM Card Core Wireless Board Quad-band TTL Serial Port
Module model: SIM800L
Working voltage: 3.7~4.2V (current peak 1A, please handle it)
Support Network: Global Quad Band Network
Module size: 2.5cmx2.3cm
The serial port is a TTL serial port, which can be directly linked with the MCU.
Module power-on automatically starts, automatically finds the network
Onboard signal lights all the way . It flashes slowly when there is a signal,it flashes quickly when there is no signal.
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