- ESP chip version: ESP-8266EX (ESP12F?)
- Flash size: 4M
- Onboard USB-TTL converter: yes:
- GPIO's broken out/available to free use:
- GPIO tied to onboard hardware (like relay, button, LED on a standard sonoff)
- Power supply information: ??
- Antenna: onboard PCB antenna
Size comparison between V2 and V3: