ESP-RFID Relay Board is tiny ESP12 module (ESP8266) board, designed with wiegand RFID readers in mind and ESP-RFID Firmware Small size factor, sometimes possible to glue it into existing readers.

Farm Data Relay System is an easy way to communicate with remote IoT devices without relying on WiFi or LoRaWAN infrastructure. It establishes a series of inexpensive, low-power access points and ...

Here is a quick look at how contactless potentiometers work, where they are used, and why they are gaining ground.