ATGM336H is a compact GNSS (Global Navigation Satellite System) receiver module commonly used in embedded systems, drones, robots, vehicle trackers, IoT devices, and Arduino/ESP32 projects.
VCC:Power (usually 3.3–5 V on breakout boards)
GND:Ground
TX:GPS data output
RX:GPS configuration input
PPS:1 Pulse Per Second timing output (optional)
Typical performance
Position accuracy: about 2.5 m (CEP)
Update rate: 1–10 Hz
Tracking sensitivity: around −162 dBm
Cold start: approximately 30 seconds under open sky
Communication interface
UART (TTL serial)
Default baud rate: 9600 bps
Outputs standard NMEA 0183 sentences such as:
$GPGGA
$GPRMC
$GPGSV
$GPGSA