SimCom RS-232, Быстрый старт

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Connection Details
Sr. No. Connection / Terminal Details Note
1 DC Jack (X8) DC Input 7-15 VDC Input
2 DB9 Female Conn (X4) RS232 Connector
3 RJ11-4 Conn (X3) Audio Connector
4 TX (X1-1) Transmit Pin of SIM900
5 RX (X1-2) Receive Pin of SIM900
6 ADC (X2-1) ADC Input Pin Input Voltage Range 0V to 2.8VDC
7 RTC (X2-2) Power Supply for RTC 3V External Battery
8 DTX (X2-3) Debug Tx for debugging and upgrading
firmware
9 RTX (X2-4) Debug Rx
10 GND (X2-5) Ground Circuit Ground
11 +5V (X2-6) +5VDC Out Pin +5DC 200mA Max
12 POUT (X3-1) NC
13 DTR (X3-2) Data Terminal Ready
14 DCD (X3-3) Data Carrier Detect
15 DBR (X3-4) NC
16 CTS (X3-5) Clear to send
17 RTS (X3-6) Request to Send
18 SCL (X4-1) I2C Serial Bus Data
19 SDA (X4-2) I2C Serial Bus Clk
20 PWM1 (X4-3) PWM1 OUT
21 PWM2 (X4-4) PWM2 OUT