Description The M5Stack ATOMIC GPS Base is a compact GPS positioning base for ATOM series controllers. SKU M5-A134 adds GNSS location, NMEA-0183 GPS data output, TF card storage, and file reading or writing to ATOM Lite, ATOM Matrix, ATOMS3, and ATOMS3 Lite projects. Built around the M8030-KT positioning and navigation chip, the ATOMIC GPS Base includes built-in FLASH and a coin cell battery for retaining user configuration after power off. The M5Stack ATOMIC GPS Base supports GPS, GLONASS, GALILEO, BDS, SBAS, and QZSS satellite systems with 72 search channels. It is useful for vehicle positioning, marine navigation, trajectory recording, bus stop announcements, geolocation dashboards, mobile IoT trackers, and embedded navigation projects that need standard NMEA-0183 output through UART. Features M5Stack ATOMIC GPS Base, SKU M5-A134, designed for ATOM series GPS and GNSS positioning projects. M8030-KT navigation chip with built-in FLASH and coin cell battery for power-off configuration retention. Supports GPS, GLONASS, GALILEO, BDS, SBAS, and QZSS for single-system positioning or multi-system combined positioning. 72 search channels for reliable satellite acquisition and location tracking. Standard NMEA-0183 output protocol with RMC, VTG, GGA, GSA, GSV, and GLL sentences. Built-in spring-loaded TF / microSD card slot for GPS data logging, trajectory export, and file operations. UART communication at 9600bps with 1 start bit, 1 stop bit, and no parity. Compatible with Atom-Lite, Atom-Matrix, ATOMS3, and ATOMS3-Lite controllers. Low-power ATOMIC GPS Base design for compact navigation and IoT positioning systems. Specifications Item Specification Product M5Stack ATOMIC GPS Base SKU M5-A134 Navigation chip M8030-KT Supported systems GPS L1, GLONASS L1, BDS B1, GALILEO E1, SBAS L1, QZSS L1 Accuracy Horizontal: 2m, speed: 0.1m/s, time: 1us Channels 72 search channels Update rate 1-10Hz Maximum speed 515m/s Maximum acceleration < 4g Sensitivity Tracking: -167dBm, acquisition: -160dBm, cold start: -148dBm, hot start: -156dBm Start time Cold start: 26s, warm start: 25s, hot start: 1s Baud rate 9600bps Output protocol NMEA-0183 NMEA sentences RMC, VTG, GGA, GSA, GSV, GLL Indicators TX blue light flashes during data output; PPS flashes after 3D positioning Operating temperature 0°C - 40°C Product size 48.0 x 24.0 x 17.5mm Package size 136 x 92 x 20mm Product weight 14.4g Gross weight 18.1g PinMap 3V3, UART_TX, SPI_MOSI, 5V, SPI_CLK, GND, SPI_MISO Applications Vehicle GPS positioning, route tracking, and mobile IoT location reporting. Marine navigation, field equipment tracking, and portable ATOM navigation terminals. Trajectory recording with TF / microSD storage and map software export workflows. Bus stop announcements, coordinate viewing, geofencing, and location-aware automation. GNSS experiments using GPS, GLONASS, GALILEO, BDS, SBAS, and QZSS satellite signals. File reading and writing projects where the ATOMIC GPS Base is also used as a TF card reader. Product List 1 x M5Stack ATOMIC GPS Base, SKU M5-A134 Other Content The ATOMIC GPS Base outputs standard NMEA-0183 GPS sentences, making it easy to parse location, time, speed, and satellite information in Arduino, UiFlow, or custom serial tools. For UART communication, use 9600bps, 1 start bit, 1 stop bit, and no parity. The TX indicator flashes when data is output, while the PPS indicator flashes after successful 3D positioning. The built-in TF / microSD card slot allows the M5Stack ATOMIC GPS Base to record GPS data or read and write regular files. This makes M5-A134 useful not only as a GNSS positioning module, but also as a compact ATOM data logging base for trajectory tracking and portable field recorders. Resources M5Stack ATOMIC GPS Base official documentation Atomic GPS Base Arduino Quick Start Atomic GPS Base microSD example with Atom Atomic GPS Base location example with AtomS3 Atomic GPS Base UiFlow2 documentation Atomic GPS Base model size PDF Multi-mode satellite navigation receiver protocol specification FAQ Which controllers are compatible with M5-A134? The M5Stack ATOMIC GPS Base is compatible with Atom-Lite, Atom-Matrix, ATOMS3, and ATOMS3-Lite controllers. Which satellite systems does the ATOMIC GPS Base support? M5-A134 supports GPS, GLONASS, GALILEO, BDS, SBAS, and QZSS. It can be used for single-system positioning or multi-system combined positioning. What data protocol does this GPS base output? The ATOMIC GPS Base outputs NMEA-0183 data, including RMC, VTG, GGA, GSA, GSV, and GLL sentences at the default 9600bps UART setting. Can the TF card slot be used for data logging? Yes. The built-in TF / microSD card slot can be used for GPS trajectory logging, GPS data export, and general file reading or writing.
