4.2" epaper GDEW042T2 and Dust sensor data representation
Description
Fun toy I made using a rather expensive Laser dust sensor (HM3301, 32 USD) from Seeed and a Good-Display 4.2" epaper display (4 grays, 400x300 resolution) Check more in this thread: https://twitter.com/martinfasani/status/1588836551509045249 Basically it counts particles and displays them in the screen. Useful to hand in a smokers room with the label ## This particles of smoke will take out your life slowly ## WIRING ### Between epaper and ESP32 CONFIG_EINK_SPI_MOSI=23 CONFIG_EINK_SPI_CLK=18 CONFIG_EINK_SPI_CS=12 CONFIG_EINK_DC=19 CONFIG_EINK_RST=27 CONFIG_EINK_BUSY=33 ### Between ESP32 and sensor #### I2C Configuration CONFIG_SCL_GPIO=22 CONFIG_SDA_GPIO=21 ####Plus additional IO that on LOW puts the consuming thing to sleep HM3301_SET_GPIO=GPIO_NUM_14 ### C++ program example https://github.com/martinberlin/epaper-weather-station/tree/develop/main/SPI-displays -> particle-draw
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