Pressure = pressure + (var1 + var2 + dig_P7) / 16.0 # Refine pressure and adjust for temperature Time.sleep(wait_time/1000) # Wait the required timeĭata = bus.read_i2c_block_data(addr, REG_DATA, 8) # Wait in ms (Datasheet Appendix B: Measurement time and current calculation) # Oversample setting for humidity register - page 26īus.write_byte_data(addr, REG_CONTROL_HUM, OVERSAMPLE_HUM)ĭig_H4 = dig_H4 | (getChar(cal3, 4) & 0x0F)ĭig_H5 = dig_H5 | (getUChar(cal3, 4) > 4 & 0x0F) (chip_id, chip_version) = bus.read_i2c_block_data(addr, REG_ID, 2) # return one byte from data as an unsigned char Lcd_byte(0x01,LCD_CMD) # 000001 Clear displayīits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT Lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size Lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off Key="DO5Zxxxxxxx圎" # Enter your Write API key from ThingSpeak LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th lineĭEVICE = 0x76 # Default device I2C addressīus = smbus.SMBus(1) # Rev 2 Pi, Pi 2 & Pi 3 uses bus 1 LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line LCD_WIDTH = 16 # Maximum characters per line I2C_ADDR = 0x27 # I2C device address, if any error, change this address to 0x27 # Interfacing I2C LCD Module to print the BMP280 Sensor data # Raspberry Pi Weather Station using BM280 with Now to read the BMP280 Sensor data on I2C bus we have used the Bitbucket repository and customize the code to print on the LCD display and posting to the API to create real time weather station.Ĭreate a new Python file with name of Pi3_BMP280.py and copy the below code.
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