Hello to everyone,
i am reading the datasheet and application note of new SIM868.I cant figure out which is the modem UART.
Where i will connect my Arduino to send the AT commands and get response.I used older modules but they had 1 serial interface and everything was clear.
SIM868 has 2 UART(1 and 2),1 GPS_UART and a USB UART.
The Hardware Design Manual (http://www.mt-system.ru/sites/default/files/documents/sim868_hardware_design_v1.00_0.pdf) clearly states that for standard communication using AT commands UART1 has to be used. To connect the module to an Arduino a level converter is necessary, the above document shows a simple circuit to implement one.
I read it before post but i was not sure.
Thank you.
i have searched for sim 868 arduino interfacing but i didnt get any code anywhere! although is it possible to recive gps data and send gsm/gprs data at a same time using sim868 module????