This is an implementation of HomeKit temperature and humidity sensor on ESP-01S(ESP8266)
SimpleDHT
HomeKit-ESP8266
First you need to fill in your wifi info in wifi_info.h.
Build the project in Arduino/PlatformIO/Any IDE you fancy, upload it to your ESP01S in flash mode. Then you are ready to plugin and play.
Or you can try to use the pre-built binary file, and upload it via 'esptool'(recommended).
python3 -m pip install esptool
python3 -m esptool erase_flash
python3 -m esptool -b 115200 write_flash -fs 1MB -fm dout -ff 40m 0x0 firmware.bin