NEW PRODUCT – Basic GPS module – PMB-648. We picked up a few of these lower-cost GPS modules specifically for those that want to use them for time-keeping purposes. They function perfectly fine as a GPS, but they are not as accurate or low-power as the EM-406 modules we carry for location applications. For that reason, we don’t suggest them for precise, battery-powered location logging.
The PMB-648 GPS features 20 parallel satellite-tracking channels for fast acquisition of NMEA0183 v2.2 data for robotics navigation, telemetry, or experimentation. There is a built-in patch antenna; rechargeable battery for memory and RTC backup; cable for power, TTL and RS-232 connections.
20 parallel satellite-tracking channels for fast acquisition and reacquisition
Built-in rechargeable battery for memory and RTC backup
Supports NMEA0183 V2.2 data protocol
Includes cable for power, TTL and RS-232 connections
Power requirements: 3.3V – 5V DC @ 65mA
Communications: TTL or RS-232 asynchronous serial @ 4800 bps
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I picked up one of the old parallax PMB-248 modules Adafruit was stocking before, and like this module, it doesn’t have a pulse per second (PPS) output. If you’re happy with just a serial data stream these will work fine. One of the next project coming up to the head of my queue is going to be a standalone GPS SNTP server if I can get all the code to fit in a ATMega328. I’m really hoping to use the PPS output to narrow in on the exact time. I’m looking at using the EM-406 I have or I’ll get another module with an external antenna option.