Sigfox devices rarely open a raw GPRS GPS socket to your VPS. Positions usually arrive because the Sigfox backend posts an HTTP callback. Traccar’s SigfoxProtocol wires HTTP codecs on port 5154; SigfoxProtocolDecoder reads JSON keys such as device / deviceId, positionTime / lastSeen, nested location lat/lon, payload, magStatus, temperature, rssi, and seqNumber.
Not a Topflytech twin
If someone asks for )-terminated ASCII on 5154, they are in the wrong integration. Sigfox tickets start in the Sigfox cloud callback UI.
Stance
Catalogue positions_only. Evidence includes Traccar decoder + Sigfox platform docs.