two uart ports in atmega 16

[rajnandeshabhi]

hello everyone,

Actually i am working on survillance robot...in that i have interfaced a gps module through serial port..

but, now i want to send that data remotely to another device using rf module...

so i need another uart port to make that happen(as far as my knowledge)..

is there any way we can do that..

i am using atmega16 microcontroller...

is there any mc from atmega which has 2 serial ports??


regards...

Abhiraj

 

[sabouras]

You may use a software uart as atmel application note.
http://www.atmel.com/Images/doc0952.pdf
hope that helps.

 

[rajnandeshabhi]

thanks...but is there any other way we can do it......

 

[sabouras]

yes. First you could find a micro-controller with two uarts. Second you could put another micro-controller in order not to change your hardware too much and communicate with the second micro and the second micro provide the extra uart you need. Secondly you could use a RS232 translator such as max232 which has 2 uart receivers and transmitters. So you could with the help of one extra pin to connect the first or the second pair of translators and communicate with solid state relay or regular relay or a multiplexer.
You have a lot of choices.

 

[rajnandeshabhi]

ok thanks a lot! thanks for helping....:razz:

 

[karthikeie]

I faced the same problem... This could be done with one UART port itself. Use a relay. Made the connection like below.
Connect the Tx of GPS& GSM to Rx of the micro controller through a relay.
connect the Rx of GSM to Tx of the micro controller.
By switching between the Tx pins of GPS and GSM you could get data from both..
I have done this with PIC 16F877A which has one UART.

 

[rajnandeshabhi]

oh ok thanks