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Nano CH340 Chip Board Without USB Cable Compatible with Arduino (Soldered)Features-1 pair of TTL level serial transceiver ports RX / TXUsing Atmel Atmega328P-AU MCUThere is a bootloader installed in itSupport USB download and PowerSupport for external 5V ~ 12V DC power supplySupport power supply by ..

ESP8266/ ESP-12F Module/ Serial WIFI Witty Cloud Development Board + MINI nodeMCUFeatures-LDR Light Sensor on boardWS2812 Led on board3x tactile buttons (1x in the Witty board and 2x in theCH340 board)Micro USB connection for power and/or programmingUses latest ESP-12F module with 4M flash and integ..

PN532 NFC RFID Read Write Module V3 KitFeatures-Support II2, SPI, and HSU (High-Speed UART)I2C / UART: 3.3V ~ 24V TTLSPI: 3.3V TTL with 100-ohm resistors in seriesCommunication distance: 5cm~7cmOn-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPIWork in NFC Mode or RFID reader/writ..

Ai Thinker ESP-01M WiFi ModuleFeatures-The smallest 802.11b/g/n Wi-Fi SoC moduleUses low power 32bit CPU and compatible with an application processorMain frequency up to 160MHzBuilt-in 10Bit high precision ADCSupport UART/GPIO/PWM/ADC interface..

Ai Thinker ESP-12E ESP8266 Serial WiFi ModuleFeatures-802.11 b/g/nIntegrated low power 32-bit MCUIntegrated 10-bit ADCIntegrated TCP/IP protocol stackIntegrated TR switch, balun, LNA, power amplifier and matching network..