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TTL UART (/dev/ttySerial0 on the Raspberry Pi)
The switch is open when in contact with the MagnMagnet
A Wi-Fi access point advertises its SSID and can be connected to via any Wi-Fi device or computer
Converts wireless signals to serial input and output
Test the temperature sensor
Wireless Waterproof Digital Temperature Sensor Temperature and Humidity Sensor TTL UART (/dev/ttySerial0 on theThis is a wireless, battery operated, waterproof temperature transmitter. The wireless temperature sensor is configured to transmit a temperature reading every 5 minutes. The device sleeps between transmissions to conserve battery power and is awakened every 5 minutes by an internal timer. This allows the device to be used for around 1 year on a single coin cell battery. The transmission interval can be configured between 1 minute and 999 minutes. If