SparkFun GPS Breakout - NEO-M9N, U.FL (Qwiic) Shipping:2-4 Weeks Even without any external hardware

Even without any external hardware

you'll need to arrange your circuit so that the ammeter sits 'right below' the "ground" of whatever you are sensing

048-V Reference: 5 ppm/°C (typ) Drift

even heading and speed over I2C without the need for constant serial polling

There are a few USB power meters out there

SparkFun GPS Breakout - NEO-M9N, U.FL (Qwiic) Shipping:2-4 Weeks Even without any external hardwareThe SparkFun NEO M9N GPS Breakout is a high quality GPS board with equally impressive configuration options. The NEO M9N module is a 92 channel u blox M9 engine GNSS receiver, meaning it can receive signals from the GPS, GLONASS, Galileo, and BeiDou constellations with ~1. 5 meter accuracy. This breakout supports concurrent reception of four GNSS. This maximizes position accuracy in challenging conditions, increasing precision and decreases lock time;