Hallo,
bin jetzt als PHP-Anfänger gerade verwzeifelt … versuche seit ca 2 Stunden, aus dem Rückgabe-JSON eines Shelly UNI einen Wert zu extrahieren - und nur PHP-Fehler 
Wie kann ich aus dem Ergebnis den Wert von [tC] (Temperatur) holen.
[tC] => 20,5
hier das gesamte JSON:
stdClass Object
(
[wifi_sta] => stdClass Object
(
[connected] => 1
[ssid] => SUNSET
[ip] => 192.168.8.46
[rssi] => -39
)
[cloud] => stdClass Object
(
[enabled] =>
[connected] =>
)
[mqtt] => stdClass Object
(
[connected] => 1
)
[time] => 20:31
[unixtime] => 1619029918
[serial] => 10
[has_update] =>
[mac] => 8CAAB54BF9DB
[cfg_changed_cnt] => 0
[actions_stats] => stdClass Object
(
[skipped] => 0
)
[relays] => Array
(
[0] => stdClass Object
(
[ison] =>
[has_timer] =>
[timer_started] => 0
[timer_duration] => 0
[timer_remaining] => 0
[source] => input
)
[1] => stdClass Object
(
[ison] =>
[has_timer] =>
[timer_started] => 0
[timer_duration] => 0
[timer_remaining] => 0
[source] => input
)
)
[inputs] => Array
(
[0] => stdClass Object
(
[input] => 0
[event] =>
[event_cnt] => 0
)
[1] => stdClass Object
(
[input] => 0
[event] =>
[event_cnt] => 0
)
)
[adcs] => Array
(
[0] => stdClass Object
(
[voltage] => 12,16
)
)
[ext_sensors] => stdClass Object
(
[temperature_unit] => C
)
[ext_temperature] => stdClass Object
(
[0] => stdClass Object
(
[hwID] => 284abafa422001dd
[tC] => 20,5
[tF] => 68,9
)
)
[ext_humidity] => stdClass Object
(
)
[update] => stdClass Object
(
[status] => idle
[has_update] =>
[new_version] => 20210415-131910/v1.10.3-g23074d0
[old_version] => 20210415-131910/v1.10.3-g23074d0
)
[ram_total] => 49320
[ram_free] => 36180
[fs_size] => 233681
[fs_free] => 146835
[uptime] => 4588
)