This library implements GNSS support on Particle devices that have a Quecetel cellular modem that has GNSS support.

This library is can only be built with device OS version 5.8.2 and greater. It is intended for use the the following devices:

Device	Modem	Platform
M404	BG95-M5	msom
M524	EG91-EX	msom
B504e	EG91-NAX	b5som

Note: This library cannot be used with the B524/B523 as those devices contain a EG91-E cellular modem, which does not have GNSS support.

It also cannot be used with any device with a u-blox cellular modem (B402/B404/B404X or any Boron) as none of the modems support GNSS.

Some location parameters are not supported on some cellular modems.

Feature	BG95	EG91
horizontalAccuracy	✅
verticalAccuracy	✅

Repository: https://github.com/rickkas7/QuectelGnssRK
License: Apache 2
This library is a modified version of https://github.com/particle-iot/particle-som-gnss/ with a modified API and additional features.
Full browseable API documentation

Using with LocationFusionRK

Example 4 works with the LocationFusionRK library to combine cellular, Wi-Fi, and GNSS location.

LocationFusionRK::instance()
    .withAddTower(true)
    .withAddWiFi(true)
    .withPublishPeriodic(5min)
    .withLocEnhancedHandler(locEnhancedCallback)
    .withAddToEventHandler(QuectelGnssRK::addToEventHandler)
    .setup();

Use the withAddToEventHandler() method of LocationFusionRK to add the handler QuectelGnssRK::addToEventHandler. This uses this library to obtain GNSS information from the cellular modem, but allow fallback to using Wi-Fi or single cellular tower geolocation if there is no GNSS fix available.

Revision History

0.0.1 (2025-10-29)

Initial fork from particle-som-gnss v1.0.0 (2024-08-09)
Added support for b5som and EG91
Added asynchronous API
Added more examples