Satujamsaja

On previous post we learn how to use LCD as Arduino project display. Another common display for Arduino project is Nokia 5110 LCD. The LCD is the same display used for legendary Nokia 3310 phone. The driver use PCD8544 controller by Phillips. It has nice contrast and also led backlight. Here the example on my project.

On previous post measurement sensor results displayed on serial monitor. This is good when we are on development stage. When we want something more independent we need external display. I have purchased a few type of display. For now we will use LCD 2004 for external display.

This sensor based on BMP 280 digital pressure sensor made by Bosch. You can find the complete datasheet here . This small sensor is quite impressive with it's accuracy. It claimed to be ±1 hPa in measuring barometric pressure, ±1.0°C in temperature measurement and ±1 meter in altitude accuracy. Pretty impressive right ?

DHT 22 is low cost temperature and humidity sensor. This sensor has more accuracy compared to previous version (DHT 11). See the comparison here . My DHT 22 comes with in breakout board, so there is no need to add additional resistor to drop the voltage. This sensor has 3 pins.