Heltec L76K GNSS module GPS/BeiDou/GLONASS/QZSS with antenna

Product detailed description

Heltec L76K is a low-power GNSS module featuring the Quectel L76K chip, a ceramic antenna, and support for concurrent reception of GPS, BeiDou, GLONASS, and QZSS. By combining multiple satellite systems, you achieve faster position fixes and more reliable reception, even in urban environments or built-up areas where GPS alone is insufficient. The module communicates via UART using the NMEA 0183 protocol, making it compatible with practically any microcontroller. With a 1.25 mm connector and the included 8-pin cable, it plugs directly into Heltec WiFi LoRa 32 V4 and Mesh Node T114 boards, making it an ideal accessory for Meshtastic, MeshCore, and other LoRa networks. In addition to the RX and TX data pins, it features a PPS output for precise time synchronisation, an RST input for reset, and a WAKE_UP input for waking from power-saving mode.

Specifications:

• Chip: Quectel L76K
• Satellite systems: GPS, BeiDou (BDS), GLONASS, QZSS (concurrently or independently)
• Channels: 32 tracking / 72 acquisition
• Sensitivity:
  • Tracking: −162 dBm
  • Reacquisition: −160 dBm
  • Signal acquisition: −148 dBm
• Accuracy:
  • Position: 2.5 m CEP
  • 1PPS time mark: 10 ns
• Time to First Fix (TTFF):
  • Cold start: approx. 30 s
  • Warm start: approx. 5.5 s
• Data refresh rate: up to 10 Hz
• Power supply: 2.8–4.3 V DC
• Current consumption: 18 mA at 3.3 V
• Communication: UART, NMEA 0183 protocol (default baud rate 9600 Bd)
• Antenna: integrated ceramic patch antenna
• Connector: 8-pin, 1.25 mm pitch (interconnect cable included)
• Pins: VDD_3V3, Ve_3V3, GND, RX_GPS, TX_GPS, PPS, RST_GPS, WAKE_UP
• Compatible boards: connects directly via 8-pin 1.25 mm connector to:
  • Heltec WiFi LoRa 32 V4.3 ESP32S3 + SX1262 868 MHz
  • Heltec Mesh Node T114 V2.0 nRF52840 + SX1262 868 MHz
• L76K Chip Dimensions: 10.1 × 9.7 × 2.5 mm
• Operating Temperature: −40 °C to 85 °C
• Storage Temperature: −45 °C to 125 °C

Connection to Heltec WiFi LoRa 32 V4 board:

• RX_GPS: GPIO39
• TX_GPS: GPIO37
• PPS: GPIO36
• RST_GPS: GPIO38
• WAKE_UP: GPIO34

Package contents:

• 1× Heltec L76K GNSS module
• 1× 8-pin interconnect cable, 1.25 mm pitch

Note:

• This product is not a standalone functional unit and may require professional installation.
• The module requires a clear view of the sky for position fixing. Reception is significantly poorer or non-existent inside buildings.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.