Introducing the E-Paper Proximity Node

Written By Matt Calhoun

This is the newest addition to the family of ChatterBox devices. This is based on the Lilygo T3S3 E-Paper and the DFRobot Doppler mmWave presence/motion sensor.

This node is fully configurable and remote-controllable by the ChatterBox communicator firmware for T-Deck, T-Deck Plus, and Rokland T-Deck Complete.

Download the firmware or get complete build instructions from our ChatterBox mesh DIY site. You can build one of these now! The firmware for this proximity node is completely free.

When interacting with devices such as this within a private cluster, all your interactions are completely off-grid (LoRa) and secured as any other ChatterBox direct message using the following techniques:

  • Asymmetric encryption

  • ECDSA digital signatures

  • Signed expiry (to prevent replay)

  • Unpredictable frequency hopping for jam resistance

Screenshot from a T-Deck Remote Controlling a proximity sensor

Matt Calhoun
Previous

Remotely Enable / Disable Mesh and More Firmware Updates
Next

ChatterBox is Now Free for the Open/Public Channel!