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Node MCU V3 - LoLin (Wi-Fi)
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NodeMCU is the ideal module for Internet of Things (IoT).
It combines WiFi connectivity with the versatility of Arduino.
Has 9 digital IO pins out of wich 8 are PWM capable and one input analog pin.
It's based on the ESP8266 chip running at 26 Mhz, with 4 MB flash and 160 KB RAM (specs)
By default, the firmware allows running LUA scripts but it can be easily adapted to run Arduino code: link
Control a led from the Internet: link
Reference: ZTAXTI_BT4.0-CC2540
Bluetooth 4.0 module - BLE CC2540 CC2541
Reference: HCRTIF_BT5_MOD