Compatible Sensors & Components

These components are compatible with the ChatterBox firmware. If added to a node (DIY build plans), you can interact with them remotely and securely via any on-cluster communicator. If added, it may take your cluster a few minutes or more to recognize that a node has these additional capabilities.

GPS / GNSS

Any communicator or node that has GNSS onboard regularly share its location, heading, and speed (encrypted) with the rest of your private cluster. That location info will be propagated to out-of-range devices as well. GNSS can also function as a time source.

DFRobot 1103 GNSS & RTC

This GNSS tends to acquire a signal faster than the DFR without RTC.

Cost (2025): $26

Source: Digikey, DFRobot


DFRobot TEL0157

High Accuracy Gravity GNSS Receiver

Cost (2025): $18

Source: Digikey, DFRobot


Sparkfun SAM-M8Q

High Accuracy Gravity GNSS Receiver

Cost (2025): $44

Source: Sparkfun

Proximity / Motion Sensors

Sense and be notified of people and/or motion. Nodes with these sensors can be queried (via any communicator) for last detected motion, and configured to notify. The XM125 can also report distance and very approximate movement speed (fast, medium, slow).

Sparkfun XM125

Pulsed Coherent Radar Sensor - Acconeer XM125

Cost (2025): $50

Source: Sparkfun


DFRobot CR4001

24GHz Human Presence Detection Sensor

Cost (2025): $13

Source: DFRobot

Relays

Allow you to remotely open/close a circuit using any communicator. When combined with a proximity sensor, you can configure the node to automatically close a circuit when the proximity sensor detects motion.

Sparkfun Single Relay

Qwiic Single Relay

Cost (2025): $18

Source: Sparkfun


Adafruit Relay

Non-latching, STEMMA

Cost (2025): $7

Source: Adafruit

Realtime Clocks

For security reasons, ChatterBox devices need to have a good source of time. GPS can be a source of time, but it slows down the device startup (waiting for a signal or help from a nearby device). If you have a realtime clock, startup is instant, even with no GPS signal.

Adafruit DS3231

Qwiic / Stemma version

Cost (2025): $14

Source: Adafruit


Sparkfun RV-8803

Qwiic

Cost (2025): $21

Source: Adafruit