The climate trackers are sensor units which measures indoor environmental conditions. It connects to a server via WiFi and reports values using MQTT and ESPHome. It features a screen which displays graphs. The sensor is a Bosch BME688, which measures: the ambient temperature, humidity, barometric pressure, and CO2 VOC estimates. The controller is an ESP32 and programmed with ESPHome. Readings are recorded in a VictoriaMetrics database on the server. Alerts are sent to relevant managers if values exceed and acceptable range.