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NodeMCU is an open source IoT platform. It includes firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which is based on the ESP-12 module. The term "NodeMCU" by default refers to the firmware rather than the development kits. The firmware uses the Lua scripting language. It is based on the eLua project, and built on the Espressif Non-OS SDK for ESP8266. It uses many open source projects, such as lua-cjson, and spiffs.
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Based on TP4056, this includes two pieces of 3.7V lithium battery charger modules, one of which is Micro USB interface, the other is Mini USB interface. It is small size and light weight, especially for a single lithium battery charging. Features: - Input voltage: 4.5V ~ 5.5V - Input Interface: Micro USB port or Mini USB port - Charging method: linear charge - A full charge voltage: 4.2V - Charge Current: 1A (default), modify the onboard resistor to adjust the charging current according to the table below. - Charging accuracy: 1.5% - Charging indicator: Red LED charging, Blue LED full. - Output Reverse: lithium batteries can not be reversed.
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RGB LED module consists of a plug-in full color LED made by R, G, B three pin PWM voltage input can be adjusted Section three primary colors (red / blue / green) strength in order to achieve full color mixing effect. Control of the module with the Arduino can be achieved Cool lighting effects.
Specifications
- the use of plug-in full-color LED
- RGB trichromatic limiting resistor to prevent burnout
- through the PWM adjusting three primary colors can be mixed to obtain different colors
- with a variety of single-chip interface
- the working voltage: 5V
- LED drive mode: common cathode driver
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1, AO, analog output, real-time output voltage signal of the microphone 2, DO, when the sound intensity reaches a certain threshold, the output signal [high and low threshold - Sensitivity adjustment by potentiometer] Module features: 1, there is mounting screw holes of 3mm. 2, using the 5v DC power supply. 3, the analog output. 4, there is a threshold level output flip. 5, High sensitivity microphone, high sensitivity. 6, a power indicator light. 7, the comparator output indicator lamp.