I'm using the sketch below from your product page and am not receiving the data your product page says I should. What is the problem with your sketch please?
This is what i see in serial monitor:
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
"Initializing Flash Memory...
Determining write/read start point...
Done.
Send 'y' to start read mode. Write mode will begin in waitTime seconds...
Now initiating write mode.
Attempting to wake GPS module.. done."
////////////////////////////////////////////////////////////////////////////////////////////////////////////
I've tried several times over several years to get your products working, and after another full afternoon (6-8 hours) of trying to get this working without success, I will likely put on shelf again.
This is the sketch I am using from your product page:
//-------------------------------------------------------------------------------
// TinyCircuits GPS Tracker Tutorial Program
// Last updated 27 February 2017 (1.02)
//
// Using the GPS TinyShield, the Flash Memory TinyShield, and the TinyDuino,
// this program turns the stack into a miniature GPS tracker and data logger.
// The code detects which sentence is being read and formats the string accordingly.
// In order to reduce the number of writes, we write one NMEA sentence per 10 seconds,
// which can be modified.
//
// With the Telit SE868 V2 module with Glonass support, some messages come through
// as GN** sentences instead of GP**. These are changed back to GP** before logging
// so that they don't cause problems with programs like Google Earth.
// Some GPS modules have been shipped with 4800 baud instead of 9600- try this if
// you see bad data.
//
// The Software Serial library should be modified for a larger buffer- 256 is enough
// for GGA and RMC sentences at 1Hz. In SoftwareSerial.cpp, the change looks like:
// #define _SS_MAX_RX_BUFF 256
//
// Written by Ben Rose & Lilith Freed for TinyCircuits,
http://TinyCircuits.com//
//-------------------------------------------------------------------------------
//This may need to be set to 4800 baud
const int GPSBaud = 9600;
const int waitTime = 4000;
#include "SoftwareSerial256.h"
#include <SPIFlash.h>
// The chip/slave select pin is pin 5 for the Flash Memory TinyShield
const uint8_t flashCS = 5;
unsigned long address = 0;
// The SPIFlash object for the chip. Passed the chip select pin in the constructor.
SPIFlash flash(flashCS);
// The Arduino pins used by the GPS module
const uint8_t GPS_ONOFFPin = A3;
const uint8_t GPS_SYSONPin = A2;
const uint8_t GPS_RXPin = A1;
const uint8_t GPS_TXPin = A0;
const uint8_t chipSelect = 10;
// The GPS connection is attached with a software serial port
SoftwareSerial Gps_Serial(GPS_RXPin, GPS_TXPin);
// Set which sentences should be enabled on the GPS module
// GPGGA -
char nmea[] = {'1'/*GPGGA*/, '0'/*GNGLL*/, '0'/*GNGSA*/, '0'/*GPGSV/GLGSV*/, '1'/*GNRMC*/, '0'/*GNVTG*/, '0'/*not supported*/, '0'/*GNGNS*/};
void setup()
{
static const int RXPin = A1, TXPin = A0;
Gps_Serial.begin(GPSBaud);
Serial.begin(115200);
Serial.println("Initializing Flash Memory...");
Serial.println();
pinMode(flashCS, OUTPUT); // Ensure chip select pin is an output.
flash.begin(); // Boots the flash memory
Serial.println("Determining write/read start point...");
uint8_t flashBuffer[256];
uint8_t foundStart = false;
while (!foundStart) {
flash.readByteArray(address, flashBuffer, 256);
int i;
for (i = 0; !foundStart && i < 256; i++) {
if (flashBuffer
== 0xFF) // checks for the first logical 1
foundStart = true;
}
address += i;
}
address--;
Serial.println("Done.");
Serial.println();
unsigned long timer = millis();
Serial.println("Send 'y' to start read mode. Write mode will begin in waitTime seconds...");
Serial.println();
while(millis() < timer + waitTime) {
if(Serial.available()) {
if(Serial.read() == 'y') {
readFlash(address);
}
}
}
Serial.println("Now initiating write mode.");
Serial.println();
// Init the GPS Module to wake mode
pinMode(GPS_SYSONPin, INPUT);
digitalWrite(GPS_ONOFFPin, LOW);
pinMode(GPS_ONOFFPin, OUTPUT);
delay(100);
Serial.print("Attempting to wake GPS module.. ");
while (digitalRead( GPS_SYSONPin ) == LOW )
{
// Need to wake the module
digitalWrite( GPS_ONOFFPin, HIGH );
delay(5);
digitalWrite( GPS_ONOFFPin, LOW );
delay(100);
}
Serial.println("done.");
//delay(100);
char command[] = "$PSRF103,00,00,00,01*xx\r\n";
for (int i = 0; i < 8; i++) {
command[10] = i + '0';
command[16] = nmea;
int c = 1;
byte checksum = command[c++];
while (command[c] != '*')
checksum ^= command[c++];
command[c + 1] = (checksum >> 4) + (((checksum >> 4) < 10) ? '0' : ('A' - 10));
command[c + 2] = (checksum & 0xF) + (((checksum & 0xF) < 10) ? '0' : ('A' - 10));
Gps_Serial.print(command);
delay(20);
}
Serial.println();
}
void loop() {
unsigned long startTime = millis();
while (Gps_Serial.read() != '$') {
//do other stuff here
}
while (Gps_Serial.available() < 5);
Gps_Serial.read();
Gps_Serial.read(); //skip two characters
char c = Gps_Serial.read();
//determine senetence type
if (c == 'R' || c == 'G') {
c = Gps_Serial.read();
if (c == 'M') {
logNMEA(1);
} else if (c == 'G') {
logNMEA(2);
}
}
// Waits waitTime seconds before reading next NMEA string
while (millis() - startTime < 10000) {
Gps_Serial.read(); // clears GPS serial buffer
}
}
void logNMEA(uint8_t type) {
uint8_t buffer[82];
// Initializes buffer to null terminators to ensure proper writing to flash memory
for(int i = 0; i < 82; ++i) {
buffer = '\0';
}
// Writes NMEA string to buffer
buffer[0] = '$';
int counter = 1;
char c = 0;
while (!Gps_Serial.available());
c = Gps_Serial.read();
while (c != '*') {
buffer[counter++] = c;
while (!Gps_Serial.available());
c = Gps_Serial.read();
}
buffer[counter++] = c;
while (!Gps_Serial.available());
c = Gps_Serial.read();
buffer[counter++] = c;
while (!Gps_Serial.available());
c = Gps_Serial.read();
buffer[counter++] = c;
buffer[counter++] = '\r';
buffer[counter++] = '\n';
buffer[2] = 'P'; // Changes GNRMC to GPRMC
c = 1;
byte checksum = buffer[c++];
while (buffer[c] != '*')
checksum ^= buffer[c++];
buffer[c + 1] = (checksum >> 4) + (((checksum >> 4) < 10) ? '0' : ('A' - 10));
buffer[c + 2] = (checksum & 0xF) + (((checksum & 0xF) < 10) ? '0' : ('A' - 10));
// Writes buffer array to flash memory. Write length is variable to maximize memory.
flash.writeCharArray(address, (char *)buffer, strlen((char *)buffer));
address += strlen((char *)buffer); // Sets address ahead for length of the nmea string
}
void readFlash(unsigned long address) {
char command;
do {
// Clear Serial write buffer to prepare for read
while(Serial.available()) {
Serial.read();
}
// Menu
Serial.println("Read Mode | Please select a command (1, 2, 3):");
Serial.println("1. Read to serial monitor.");
Serial.println("2. Erase all data.");
Serial.println("3. Exit read mode.");
while(!Serial.available());
command = Serial.read();
// Command select
switch(command) {
case '1':
// Handles empty flash
if(address == 0) {
Serial.println("No available data.");
Serial.println();
} else {
// Reads all available data to the Serial monitor
for(unsigned long i = 0; i < address; ++i) {
Serial.print((char)flash.readChar(i));
}
Serial.println();
}
break;
case '2':
// Erases data up until the first available byte.
eraseData(address);
address = 0; // resets the first available byte address to 0
Serial.println("All data erased.");
Serial.println();
break;
case '3':
// Exits read mode.
return;
default:
// Passes by invalid input.
Serial.println("That is not a recognized command.");
Serial.println();
break;
}
} while(command != 3);
}
// Erases the flash memory in 4KB sectors.
// Minimizes excess erase "writes".
void eraseData(unsigned long address) {
unsigned long index = 0;
while(index < address) {
flash.eraseSector(index);
index += 4096;
}
}
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