diy projects
Motorola T900 Pager Mod: Meshtastic Messaging on ESP32-S3
A Motorola T900 pager gets a Heltec V4 brain and LoRa mesh messaging while keeping its keyboard and LCD. See how the retro hack…
esp32 & esp8266
Turn Escape Room Puzzles into Home Assistant Devices with ESP32
Two open source Arduino libraries turn escape room puzzles into Home Assistant devices over MQTT. Here's the parts list and the I2C wiring to…
robotics
MIT Roughened Optical Fibers Sense 3D Shape in Soft Silicone
MIT embedded roughened rubber waveguides in silicone to track 3D shape with under 0.4 cm error. Here's how to try the same light-loss trick…
diy projects
ESP32 AI Calculator V2 Reads Your Handwritten Equations
This open source ESP32 calculator has a camera and two displays, so it can read a handwritten equation and solve it with cloud or…
iot & smart home
Raspberry Pi Runs Home Assistant to Track Its Own Net Zero Goal
Raspberry Pi clamped sensors on every breaker and ran Home Assistant on Pi 4 and Pi 5 to cut energy use. Here is how…
diy projects
Retro Brick Bluetooth Handset Built with ESP32 and an HFP Module
A retro brick handset pairs with your phone over Bluetooth. See why the ESP32 audio sounded crunchy and how a dedicated HFP module fixed…
diy projects
ESP32-S3 AM Transmitter Revives Old Tube Radios
AM stations are going dark, but an ESP32-S3 can feed internet radio to old tube sets by shaping a carrier on one GPIO pin…
esp32 & esp8266
ESP32 as a Wi-Fi Card for Raspberry Pi and Linux SBCs
No USB port and weak Wi-Fi on your Linux board? esp-hosted turns an ESP32 into a wireless card over SPI or SDIO. Here is…
diy projects
SmallTV Hack Shows Any Data on a Cheap ESP Display
A GeekMagic SmallTV can show live data from your PC with no soldering and no new firmware. Just push a 240x240 image over HTTP…
diy projects
Two ESP32s Talk Over Light Using Just One LED Each
SecurePair lets two ESP32 boards pair and swap encryption keys over visible light, with one LED per board doing double duty as sender and…
esp32 & esp8266
LocalDot: Give an Echo Dot a Local Home Assistant Brain
AAElectronics' LocalDot swaps an Echo Dot's mainboard for an ESP32-P4 and ESP32-S3 that talk only to Home Assistant. Here's how it works and how…
esp32 & esp8266
ESP32-S3 vs Raspberry Pi 5: How Much Edge AI Is Enough?
A $20 ESP32-S3 camera board vs a $200 Raspberry Pi 5 AI kit on a robot mower. See which edge AI hardware your student…