Wireless Light Sensor - Photo-resistor

Battery-operated wireless light sensor transmitter.

It can be used to detect dusk/dawn or interior light levels and is typically used to trigger an event, such as switching a light on/off, opening or closing automatic blinds, or switching anything on or off. 

The device transmits a value between 0 (dark) and 32,000 (light) and all light levels in between.

The sensor is pre-configured to transmit a light 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 powered externally, the device can operate in a fully awake mode, and luminescence readings can be requested from the sensor via a request/reply mechanism.

Tutorials:

• Wireless Sensor Tutorial
• Testing the sensor

Technical Specs:

• Transmits a value between 0(very bright) and 2300(total darkness)
• All devices are based on the high-performance RF transceiver based on the market-leading CC1100 SOC.
• A wide operating voltage range of 2-3.6V makes the devices well-suited for battery power.
• Current consumption: RX: 16.2 mA, TX: 15.2 mA. Deep Sleep: 0.005Ma (0.5 µA).
• Up to 1KM line of sight. Short range (30M) penetration of walls and floors.
• 128-bit AES encryption security.
• Driverless installation.
• All the devices are highly configurable through the serial port or over the air using the LLAP messaging protocol specified in the manual. 
• The base station communicates via a serial port (TTL UART).
• Communicates in clear ASCII text, making it very easy to exchange data between devices over the air.
• Supports point-to-point, point-to-multi-point, multi-point-to-point, and multi-point-to-multi-point.
• A virtually unlimited number of devices can be deployed—99,999 Personal Area Network ID’s, 10 channels per frequency and 7,744 Device ID’s per network.
• Super-low power consumption allows devices to run on a coin cell battery for extended periods (up to 1 year, depending on transmission rates).
• Supports six frequencies (433 MHZ, 915 MHZ (default US & Canada), 868.3 MHZ (default Europe), 868 MHZ, 903 MHZ, 315 MHZ)
• 10 channels per frequency.
• 4 pins for communicating with external microcontrollers like Raspberry Pi and Arduino: Tx, Rx, GND, 3V3.
• A battery monitor to keep track of power consumption.