here is KC868-A16 firmware, it can work with DS18B20 temperature sensor.
KC868-A16-DS18B20.zip (Size: 1,001.06 KB / Downloads: 317)
you can use three GPIOs for DS18B20:
DS18B20/DHT11/DHT21/LED strip -1: 32
DS18B20/DHT11/DHT21/LED strip -2: 33
DS18B20/DHT11/DHT21/LED strip -2: 14
the demo photo I have used GPIO32, actually you can use any of GPIO32, GPIO33, GPIO14

you can use three GPIOs for DS18B20:
DS18B20/DHT11/DHT21/LED strip -1: 32
DS18B20/DHT11/DHT21/LED strip -2: 33
DS18B20/DHT11/DHT21/LED strip -2: 14
the demo photo I have used GPIO32, actually you can use any of GPIO32, GPIO33, GPIO14