ESP32 + PIR motion sensor

Bee Motion S3 is a feature rich ESP32-S3 with a built-in PIR motion sensor that makes building your motion detection based projects easy. This compact board is feature packed with PIR sensor, light sensor, RGB LED, 2 LDOs, LiPo charging circuitry, battery voltage monitoring and a Stemma connector for easily adding Adafruit or Sparkfun sensor boards to your project.

Bee Motion S3 gives you full control of your hardware, with no cloud services that store or sell your sensor data.

What kind of projects can you make with the Bee Motion S3?

• put one in front your pets food dish to be notified when they're eating and track their eating habits
• make a night light using the built in motion sensor, light sensor and RGB led
• control a soldering iron to shut off when it no longer detects motion in case you forget to turn it off manually. (external relay required)

The possible use cases are endless.

Compatible with Arduino, CircuitPython, MicroPython and ESPhome

The Bee Motion S3 supports many different programming languages so you can use it with your favorite programming language. Not only are multiple languages supported, I also provide many example sketches in each language along with helper libraries to help make getting your project up and running as easy as possible. Check out the project Github for all the code examples.

Features & Specifications

• ESP32-S3 embedded, Xtensa® dual-core 32-bit LX7 microprocessor, up to 240 MHz
• 8 Mb flash
• 512 KB SRAM
• 384 KB ROM
• Wifi/BT
• PIR Motion Sensor
• Trim pot to adjust PIR sensitivity
• Ambient Light Sensor
• Dual LDOs
• < 100 uA deep sleep quiescent current
• RGB LED
• LiPo Charging
• Stemma/Qwiic Connector
• USB-C
• Arduino, CircuitPython, MicroPython & ESPHome

Comparison Table

Support & Documentation

The Bee Motion S3 is fully open source which you can find all the relevant documentation on our Github

Manufacturing plan

I own my own pick and place machine which makes assembling PCBs fast and easy. I also will fully test each Bee Motion S3 before it is shipped to Mouser Electronics, where it will be distributed to all backers.

Support and Logistics

After our production run is complete, we will box everything up and send it along to Crowd Supply’s fulfillment partner, Mouser Electronics, who will handle distribution to backers worldwide. You can learn more about Crowd Supply’s fulfillment service under Ordering, Paying, and Shipping in their guide.

Risks & Challenges

With the silicone chip shortage there is always some risk that the components needed to produce a product may be in short supply. With that in mind I have designed this board to use a variety of different components that can be swapped without compromising the overall design. That being said there are a couple components that are unique to this design and I have been in constant contact with the manufacture of these components to assure they will be available once I go into production.