Identical solar boxes, one Bluetooth network, no cloud: they learn what is normal, find leaks, warn before pipes fail, flag frost and mildew
Build a motion-activated SMS alert system using Seeed Studio XIAO ESP32, an ultrasonic sensor, and CircuitDigest Cloud SMS API, no GSM.
Use Arduino + WiFi to trigger WhatsApp alerts through CircuitDigest Cloud in minutes.
Use IFTTT to control your micro:bit from the cloud—no coding required.
