GSM Advice Needed


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  1. #1
    Join Date
    May 2004
    Location
    brighton
    Posts
    149

    Default GSM Advice Needed

    Hi All
    i am trying to add the capability of sms control to a project i did a few years ago.
    i project was a Data logger which used the Pic18f452.
    The Data logger is asleep all the time andits only wakes up when its time it take a reading
    by a Ds1337 RTC on RBO_Interupt pin.
    The problem is cant change the original design because its already on pcb but i do have some spear pins of the Pic brought out to a connector block just incase i was going to need them in furture they 5 pins including RB1 & RB2 interupt pins.
    (RC6 & RC7 have already being used)
    The Problem
    =========
    I have a wavecom GSM Modem that accepts AT commands from the serial port
    Because the Data Logger is in sleep mode most of the time i would need another pic to
    take control of the Gsm modem and when a valid command is received i can get this 2nd pic to use one of its pins to wake the data logger up on (RB1_Int pin)
    then send the command to the data logger.
    My question is > Is There a Better way of Doing this ?
    Your responds in appreciated

    Regards
    Isaac

  2. #2
    Join Date
    Mar 2006
    Location
    Pennsylvania, USA.
    Posts
    130

    Default

    Isaac,
    I like the 16f88 for things like this, as it has a hardware usart, so you can use Darrel's Instant Interrupts to keep an eye on your GSM modem, and it only costs a few dollars. Add a 20 Mhz crystal, and your good up to 115,000 baud.

    Good Luck,

    Jerry.
    If your oscilloscope costs more than your car...

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