TSL25911 Ambient Light Sensor


The NB-IoT & GNSS IoT phone is like a real phone. It is a cellular NB-IoT and GPS device that can be used for the 5G wireless technology. The phone has a keypad and full-color TFT LCD display with LTE & GNSS antenna connectors (or on-board antennas).  The phone is a powerful board that features a microcontroller, wireless modem, keypad, a full-color TFT LCD, re-chargeable battery, and SD card. The microcontroller is an Atmel’s SAMD21G18A MCU. The wireless modem is BG96 which is an embedded IoT (LTE Cat-M1, LTE Cat-NB1 and EGPRS) wireless communication module.

The LCD is a full-color, 2.4 inch with 240×320 pixel resolution. The Keypad consist of 25 keys covering numbers, alphabets, characters, Up/Down/Right/Left buttons, and functions buttons. The IoT phone can be powered from either a UCB power source or a re-chargeable battery.

Weight 0.25 kg

4 in stock



The TSL25911 ambient light sensor board is a compact board that sense light intensity. The board is based on TSL25911 module which is a highly sensitive light-to-digital converter that transforms light intensity into a digital signal. The board provides digital ambient light sensing (ALS) that approximates human eye response to light intensity. It enables accurate ALS measurements when exposed to very low light such as when operating behind light-attenuating materials. It provides accurate ALS measurements across a wide range of light intensities due to its ultra-high sensitivity, wide dynamic range, and ability to operate in bright sunlight.


  • High light-detecting sensitivity which is ideally suited for operation behind spectrally distorting material
  • Enables low-light (377 uLux) to bright sunlight operation
  • Dual Diode:
    • Broadband photodiode – visible & IR light
    • Infrared photodiode – IR light
  • Programmable analog gain and integration time
  • 600M:1 dynamic range
  • Two internal Interrupt sources
  • Programmable upper and lower thresholds
  • Interrupt includes programmable persistence filter

Typical Applications

  • Ambient Light Sensing (ALS)
  • Digital signage
  • White goods
  • Medical and industrial instrumentation
  • Keyboard illumination control
  • Solid-state and general lighting control
  • Printer paper detection
  • Internet of things


TSL25911 User Manual

Arduino sketches for the TSL25911 can be downloaded from the following website:

To use the board with Arduino IDE and starts running Arduino projects and sketches, install the following software:

Install Arduino IDE for Windows from the following website:

Download and install Arduino library ( here: