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Content from machine import I2C,Pin import ugfx,time BME280_ADDR = 0x76 BME280_REGISTER_CHIPID = 0xD0 BME280_REGISTER_PRESSUREDATA = 0xF7 BME280_REGISTER_CONTROL = 0xF4 BME280_REGISTER_CONFIG = 0xF5 ugfx.init() ugfx.clear(ugfx.WHITE) i2c = I2C(sda=Pin(26),scl=Pin(27),freq=200000) ugfx.string(0,0,"Finding sensor","PermanentMarker22",ugfx.BLACK) ugfx.flush() try: buf = i2c.readfrom_mem(BME280_ADDR,BME280_REGISTER_CHIPID,1) except OSError as e: ugfx.string(25,25,"No sensor :(","PermanentMarker22",ugfx.BLACK) ugfx.flush() time.sleep(2) raise RuntimeError("Sensor not found") if (buf[0] != 0x60): ugfx.string(25,25,"Device is not a BME280.","PermanentMarker22",ugfx.BLACK) ugfx.flush() time.sleep(2) raise RuntimeError("Sensor not found") # Sensor found, initialise / turn sensors on. i2c.writeto_mem(BME280_ADDR,BME280_REGISTER_CONTROL,b'\x07') # Start a loop to read the sensor value :) while 1: ugfx.clear(ugfx.WHITE) data = i2c.readfrom_mem(BME280_ADDR,BME280_REGISTER_PRESSUREDATA,3) result=0 for b in data: result = result * 256 + int(b) ugfx.string(0,0,"Pressure:" + str(result),"PermanentMarker22",ugfx.BLACK) ugfx.flush() time.sleep(2)