KC868-A4 - DHT 22

[admin]

GPIO13 is OK for DHT22. KC868-A4 board already include pull up resistance, make sure your DHT22 without pull up resistance. you can take a photo of your sensor. another way, you can download KCS v2 firmware , set DHT22 to use, test the hardware whether work well. if KCS firmware work well, then you should check your arduino code.