Using an ESP8266 ESP-01 module and an Arduino Pro Mini 3.3V I wirelessly update all outputs from my thermostat to here for data analysis and because it's cool. This requires a voltage divided rectifier since thermostats run at least 24 VAC RMS.

heart rate monitor

Arduino Mega 2560, BME280, GPS Neo 6M, GSM module sim900, 2 chanel relay module

Steuert die Boiler Aufladung abhängig von der PV-Leistung

Updates every 30 minutes

Trenutna temperatura u Krusevcu Srbija Arduino

A hotbed somewhere in Southern Germany

DIY Smartfridge

This is channel for temperature and humidity monitoring.

This is channel for temperature and humidity monitoring.

IOT sensor : temp & humd monitoring

This is channel for temperature and humidity monitoring.

This is a channel to collect temperature and humidity data

Using a MKR1000 with 1200 mAh LiPo. Sleeps between measurements.

Monitoring my Indoor-Garden.