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LEDs are ideal indicators
The board is powered by Atmel's SAMD21 MCU and features a 32-bit ARM M0 core
Micro USB input: 5 V 1A
Display accuracy: 0
SIM800L GPRS GSM Module Core Board Quad-band TTL Serial Port with the antenna MG945 LEDs are ideal indicatorsChip: SIM800L Voltage: 3. 7 4. 2 V Support networks: Global four band network Module size: 2. 5 cm x 2. 3 cm TTL serial port for serial port, you can connect directly to the microcontroller. No need for MAX232 Automatic start of the power module, connection network Signal lights on board all the way. Blinks slowly when there is a signal, flashes quickly when there is no signal. This is Small SIM800L GPRS GSM Module Micro SIM Card Core Board Quad band
