Computer debugging USB - TTL Power supply: 5V-26V, the recommended power supply 5V 2A Serial perfectly compatible microcontroller TTL serial compatible 3.3V and 5V microcontroller Need an external power supply Ensure that your SIM card is not locked GPRS shield communication baud rate is preferably 19200 bps 8-N-1 (GPRS shield default automatic matching baud rate)
Package includes:
1 x SIM900 Development Board with antenna
,
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