This led him to design the Sailor Hat with ESP32 — a marine specific, open source hardware development board ... Hat is based around a standard ESP32-WROOM-32 module. Interfaces include a ...

We’ve looked at the WROOM-DA module before. It’s an ESP32 with two antennas, and [Andreas Spiess] says it is the ugliest ESP32 he’s ever seen. But beauty is only skin deep, after all.