The SE100 is a popular GPS module made by RadioLink. The module comes plug and plays with a cable to connect with the Pixhawk & APM flight controllers. It can also be used with most open-source flight controllers, such as the PX4 and iNav FCs.
Unlike some of the cheaper GPS modules on the market, this one uses genuine components. It utilizes a U-Blox M8N GPS receiver and QMC5883L digital compass, so you can be assured of reliable performance. When testing, we found it acquired up to 20 satellites outside in under a minute, and even managed to get a 12 satellite GPS lock indoors. Another nice feature is the flashing green status LEDs on top of the module, which make it very clear when a position lock has been established.
