User Manual

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Smart Machine Smart Decision

SIM800L-EVB_User Guide_V1.00 10 2013-07-22

2 TXD O Transmit data

3 RXD I Receive data

4 DTR I Data Terminal Ready

5 GND GND

7 RTS I Request to Send

8 CTS O Clear to Send

9 RI O Ring Indicator

Debug Interface:

Pin Signal I/O Description

2 DEBUG_TX O Transmit data

3 DEBUG_RX I Receive data

5 GND GND