This project is about code that fits more functionality into small memory, the project is not an exercise in photography.

TFT module is a 1.8" 128 X160 pixel and has the driver ST7735 is driven by SPI. DHT11 sensor sends 5 bytes of data for centigrade and humidity, degrees F is calculated.

Humidity is displayed at the bottom of the screen.

Temperature range is 0-50 centigrade with resolution of 0.1.

ATtiny45 can be used too.

The code is composed of parts of libraries because using Arduino libraries take memory more than the ATtiny85 has.

Screen can be turn to white by swapping the definition of BLACK and WHITE in the code.

ATtiny is programmed using Arduino IDE and Arduino as ISP. Use these instructions https://gist.github.com/ij96/804e731bd31dbb95b2b043e93c79ceab with the difference of burning bootloader with setting "Clock Source 16MHz (PLL)", "LTO enabled".

for more info http://www.moty22.co.uk/oled_thermo.php