PJ105 light sensor
PJ105 light sensor
PJ105 light sensor

PJ105 light sensor

PJON Technologies
Regular price
Sale price
Unit price
Tax included.

The PJ105 module is a 29.9x25.6mm open-source, stand-alone, programmable phto-resistor light sensor based on ATtiny85 with PJON over PJDL networking. It needs only 3 pins (PJDL, 7-12v, GND) to operate transmitting samples and receiving incoming configuration on the same PJON IO pin.

Multiple PJ105s can be connected in parallel on the same SoftwareBitBang bus sharing the same power, ground and data connection. Each PJ105 is running an instance of the PJON protocol stack with its own configurable device id, so many can coexist on the same medium.

PJ105 has been engineered with the strong feeling that in the future "smart homes" will not necessarily host an embedded real-time operative system in whatever "thing" and expose vulnerabilities out of their physical boundaries. Otherwise, more probably, they will host many less power-hungry microcontrollers connected to a wired communication bus.

For more detailed information, visit the GitHub Repository.

Be the fist to experiment with our PJ100 module kits Limited Edition. Each sensor is soldered by hand in Rome, Italy to ensure its best quality and performance. Please be aware that in case of the initial stock termination, you can preorder and receive it within 15 working days excluding the shipping period as this sensor is being prepared for you. If you would like to order more than 20 items at once, please contact us directly at info@pjon-technologies.com. Thank you for your understanding and happy tinkering!


Please consider that PJ105 is an experimental evaluation kit not designed to be applied in production. It must be used only for research and testing purposes. Each PJ100 Limited Edition sensor is sold as is without any warranty and program. Yet you can find the suggested application examples at PJON GitHub Repository.