Awesome, thank you for measuring. Heavier than I hoped, but hopefully workable. If I really get extreme I could look at using the raw chips, but that's some serious reach for my fabrication skills. 2g for a WRoom32 means I can start planning the rest of my construction by weight. Worst case scenario...

I've got my first prototyping modules on order, but they're the bigger devices with handy legs, USB-serial onboard. Anybody happen to have or be willing to check the mass of a plain WROOM32 module? And/or any of the older ESP8266 modules? I've got some prototyping to do, but I'm considering a number...