Arduino based device acting as:
* metronome, for exercises that require timing,
* countdown timer, for rest between exercises,
* thermometer / hygrometer - when not uses for exercises.

Part list:
* Arduino MKR 1010 (ABX00023)
* Arduino MKR Connector Carrier, Grove compatible (ASX00007)
* BME280 sensor (Seeed Studio SEE-11355)
* quad, alphanumeric (14-segment), HT16K33 based display (SeedStudio SEE-14733)
* push button with backlight (Seeed Studio SEE-13660)
* passive buzzer (Seeed Studio SEE-17268)
* I2C 6 port hub (Seeed Studio SEE-15856)
* cables - as required
All modules based on Grove connections and cables.

All modules are connected to Arduino through Connector Carrier:
* buzzer - port D0,
* button - port D5,
* I2C hub - port TWI,
* sensor and display - to hub (any port)