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and the soldering tools are:
An infrared emitter on one side and a receiver on the other side is used to detect the speed or RPM
You can choose I2C for simple wiring or SPI if you want to connect many sensors easily
HC-89 Interrupt Sensor
improving its appearance while housing The board neatly behind it
ESP14 ESP8266 Serial Wireless Transceiver WiFi Module AP+STA Soldering Lead and the soldering tools are:ESP14 ESP8266 Serial Wireless Transceiver WiFi Module AP+STA The ESP 14 WiFi Module Combines ESP8266 with STM8S MCU with 802. 11b g n and can be widely used in smart home and the Internet of Things, for the user's connected devices to the Wi Fi wireless network. The module is built with a powerful STM8003 chip, all the pins are connected to the serial port and ESP8266 serial port connected, the user can write STM8 program, through the AT command to
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