Product Parameter Features of the module Multi-satellite positioning system L76K is a support multi-satellite system (GPS, BeiDou, GLONASS, QZSS), multi-system joint positioning and single system independent positioning, support AGNSS function, built-in low noise amplifier and surface filter, can provide users GNSS module with fast, accurate and high-performance positioning experience.Compared with a single GPS system, the high-precision positioning multi-satellite system greatly increases the number of visible and usable satellites, improves positioning accuracy, and can achieve stable high-precision positioning even in complex urban environments. It supports the AGNSS function, which can greatly Reduce the time for the first positioning, built-in low-noise amplifier, can achieve high sensitivity, high-precision positioning and fast signal capture and tracking, even under weak signal conditions can also ensure a good positioning performance, built-in surface acoustic filter, can greatly The anti-interference ability of the module is enhanced, and the active antenna detection circuit and protection circuit are integrated inside to protect the module and the active antenna from damage. Product Pin Diagram Introduction of T-Echo LILYGO T-Echo is a version evolved from LILYGO T-BEAM. At the beginning of the design, more consideration was to adapt to Meshtastic, so Bluetooth and low power consumption were considered when designing, and NRF52840 Advanced Bluetooth 5 was selected Thread and Zigbee multiprotocol SoC. The LORA function continues T-BEAM's LILYGO SX1262 version functional module. T-SX1262 wireless transceiver module, using Semtech SX1262 LORA RF transceiver chip design, working in the 915MHz ISM frequency band, integrated high stability TCXO 32MHz crystal oscillator, half-duplex transceiver module, power up to +22dBm, receiving sensitivity -139dBm. Automatic transceiver Switching, internal transmission and reception channel isolation, advanced LORA spread spectrum communication technology, strong anti-interference and privacy, can realize long-distance wireless data transmission and reception. Use Scene Reference T-Echo 915MHz shipping list 1 X T-ECHO Motherboard *1 X GPS Antenna*1 X LORA 915MHz Antenna 1 X NFC Antenna*1 X Touch Cable*1 X Jst 2pin1.25mm Battery Cable 1 X TYPE-C USB Cable*1 X 850mA Capacity Battery*1 X ABS Material Enclosure White T-Echo 915MHz BME280 Kit Options shipping list 1 X T-ECHO BME280 Motherboard*1 X GPS Antenna*1 X LORA 915MHz Antenna 1 X NFC Antenna*1 X Touch Cable*1 X Jst 2pin1.25mm Battery Cable 1 X TYPE-C USB Cable*1 X 850mA Capacity Battery*1 X ABS Material Enclosure White Battery capacity 850mAh Meshtastic github.com/meshtastic/Meshtastic-device/releases Basic Example github.com/Xinyuan-LilyGO/LilyGO-T-Echo SoftRF github.com/lyusupov/SoftRF/wiki/SoftRF-Configuration-Tool