The SparkFun Ultrasonic Distance Sensor - TCT40 (sen-24805) a user-friendly upgrade to the popular HC-SR04 sensor, offers non-contact distance measurement from 2cm to 400cm with an accuracy of 3mm.

The SparkFun Qwiic Soil Moisture Sensor (SEN-17731) is a simple breakout for measuring the moisture in soil and similar materials. The soil moisture sensor is pretty straightforward to use. The two ...

Modern MCU boards offer a lot of performance and a high level of programming convenience. The over-the-air (OTA) feature is particularly interesting. However, transmitting serial data wirelessly ...