Rhydo SIM 900 SIM 900 -TTL UART Uživatelský manuál stáhnout pdf (Strana 4)

w w w . f u t - e l c t r o n i c s . c o m

Page 4

SIM Card Connector

Light Status

LED

State

Function

Status

Off

Power Off

Power On

Netlight

Off

SIM900 is not working

64ms On/800ms Off

SIM900 does not find the network

64ms On/3000ms Off

SIM900 find the network

64ms On/300ms Off

GPRS communication

Getting Started

We will use tow methods

1. Using AT commands.

2. Using Arduino code (Uno – Mega) compatible .

Now we will prepare the Arduino board for communicating with the PC by UART protocol. Emulate a second

serial port (UART) using software on the digital pins D2 and D3 and patch through all the communication

between this second software serial port and the actual hardware serial port.

By doing this, all the data coming from the computer (connected to the actual hardware UART) would be

relayed as is to the GPRS Shield (connected to software UART).

 Run Arduino IDE 1.0 or later

 Open new sketch and write a below code.

SoftwareSerial mySerial(2, 3);

void setup()

{

mySerial.begin(19200); // the GPRS baud rate

Serial.begin(19200); // the GPRS baud rate

}

1 2 3 4 5 6 7 8 9 10

Žádné komentáře

Rhydo SIM 900 SIM 900 -TTL UART Uživatelský manuál Strana 4