Find or Build Lowest Possible Cost Module

[brannondorsey]

Must have:

• Battery + Charger (LiPo)
• ESP8266
• GPIO
• Firmware flashing breakout

Optional:

• External flash memory

Some current contenders include:

• $10 NodeMCU DevKit (Battery not included)
• $10 Adafruit HUZZAH (Battery not included)
• $15 Sparkfun ESP8266 Thing (Battery not included)