updraftplus
domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init
action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home1/wyolum/public_html/wp-includes/functions.php on line 6114<\/a><\/p>\n When you want to incorporate GPS into a larger project a couple of issues arise that I2GPS solves. \u00a0The first issue is that the GPS object must constantly be “fed” new data. \u00a0This leads to ubiquitous calls to gps.feed() throughout the code. \u00a0If you have other time critical functions (like updating an LED matrix), the juggling of tasks can get overly complex. \u00a0The second is the size of the code can cramp the size of your main program. \u00a0We ran into both of these problems with ClockTHREEjr.<\/p>\n I2GPS solves these problems with by offloading the memory and processing burden to a second processor. \u00a0The I2GPS slave code needs only to read the GPS, and respond to I2C requests to data.<\/p>\n I’ve modeled the interface<\/a> after the DS3231, the real time clock included with I2GPS, the same clock as the Chronodot<\/a> from Macetech. \u00a0So from the client side, things look a lot like reading the Chronodot. \u00a0Here is a snippet of client code<\/a>\u00a0(not updated). \u00a0The DS3231 is still available though the I2C interface.<\/p>\n Wall clock time is also available starting at address 0x1C.<\/p>\n
\n<\/a>We’ve written a simple I2C interface for I2GPS<\/a>\u00a0(available for sale\u00a0here<\/a>). If you’ve ever combined GPS to Arduino you have probably used TinyGPS<\/a> by Mikal Hart. \u00a0We use it too and we love it.<\/p>\n\/\/ read 32 bytes from address 0, store in \"gps_data\" byte array\r\n gps_raw_read((uint8_t)0, (uint8_t)32, gps_data);\r\n\r\n\/\/ Parse response\r\n Serial.print(\"UNIX TIME:\");\r\n Serial.println(unserialize_ulong(gps_data+0));\r\n Serial.print(\"LAT:\");\r\n Serial.print(unserialize_long(gps_data+4));\r\n Serial.println(\" 1\/1000th DEG\");\r\n Serial.print(\"LON:\");\r\n Serial.print(unserialize_long(gps_data+8));\r\n Serial.println(\" 1\/1000th DEG\");\r\n Serial.print(\"ALT:\");\r\n Serial.print(unserialize_long(gps_data+12));\r\n Serial.println(\" CM\");<\/pre>\n
gps_raw_read(0x1C, 6, ymdhms);\r\n\r\nSerial.print(\"CALENDAR TIME:\");\r\nSerial.print(ymdhms[1], DEC); \/\/ Month\r\nSerial.print(\"\/\"); \r\nSerial.print(ymdhms[2], DEC); \/\/ Day\r\nSerial.print(\"\/\");\r\nSerial.print(ymdhms[0], DEC); \/\/ Year\r\n\r\nSerial.print(\" \");\r\nSerial.print(ymdhms[3], DEC); \/\/ Hour\r\nSerial.print(\":\");\r\nSerial.print(ymdhms[4], DEC); \/\/ Minute\r\nSerial.print(\":\");\r\nSerial.print(ymdhms[5], DEC); \/\/ Second\r\nSerial.println(\"\");<\/pre>\n
<\/pre>\n