I am connecting L89H through a AMS1117 3.3v regulator which get 5v input. I am connecting the Pin 3,12 to gnd and 4,5 to 3.3v and 6 to an LED through a 1k resistor.
Also i am connecting the pin 2 which is the TXD pin to a HC 05 bluetooth module for getting the gps string in my app.
All other gps pins are open. The module gives nmea string for around 15 to 20mins and sometimes in get longer or shorter after that it some times stops or sending garbage strings. But the PPP led is still blinking.
I tried all possible ways by connecting a 0.1uf capacitor near to vcc and gnd of gps. tried connecting a 10 k pull up resistor on both RXD and TXD pins of GPS.
But some module works fine in the same board. Also once i get garbage string or no output then i switch off the module and switch on after 15mins then its start giving output and stopped.
I am confused. Any help.