![]() This tutorial explains how to use LCD for displaying purpose on ESP8266 NodeMCU development board using Arduino IDE. Connect your LCD up to your Arduino.This tutorial explains how to use 16×2 LCD on NodeMCU wifi development board using Arduino IDE.Let’s look at the final schematic again not so crazy… Now it’s time to getting connecting… Step 1: Hook up power Step 2: Hook up ground Step 3: Hook up display brightness control Step 5: Hook up additional control line Step 6: Hook up another control line Step 7: Start hooking up the data lines Step 8: Another data line… Step 8: Yet another data line… Step 8: Give me more cow bell! I mean…another data line. OR lots of alligator clips if you are feeling squirrely (not recommended). ![]() ![]() So – first things first – you are going to need the following: Luckily for us the Arduino website has a great pin layout for us to follow – but I wanted to make one that was step by step – so follow the pictures below and you should be golden.įirst let’s look at the final schematic then we will go step by step. That just about sums everything I can think of when it comes to deciding on your LCD module – so lets go ahead and hook one up! Step by step diagrams to show what LCD pins to connect to your Arduino This made it a little confusing when trying to figure out which wire to hook where. The LCD module I bought only had the numbers 1 and 16 on the far sides of each of the pads. The final thing I would mention is to check the pin numbering on the PCB. You may not be able to find a 16 pin header, but they are made to be clipped to your desired length. These make connecting your LCD to a breadboard for prototyping about a million times easier. You may also consider soldering on pin headers to the module. You can also use some pads on the top and some on the bottom – since they connect to the same thing on the LCD module the top and bottom pins are interchangeable. What this provides for is more flexibility in where you can connect your wires to control the LCD.įor example, if you plan on mounting your LCD panel in some type of enclosure, maybe the bottom pins would be more accessible. ![]() The one I use in this video tutorial series has a set of 16 pads at the top of the LCD and 16 pads at the bottom. The LCD you buy will have 16 pads where you will hook up wires or headers to connect to your Arduino, but many manufactures have made modules that also have a second set of 16 pins that are simply duplicates of the first. Plus, they can have backlights to help make the characters to stand out better in different light settings. LCDs can also come in different colors – so you don’t have to go for the standard martian green. Some of the more common sizes are 16 x 2, 20 x 2 and 20 x 4, and the bigger 40 x 4. In the picture below, the LCD would be advertised as a 16 X 2 segment. The size of the display will be given in the number of character in a row and then the number of rows. The functions in the library won’t necessarily work on other types of LCD screens. So why do we need an LCD that is compatible with the Hitachi HD44780 driver? It’s because the LiquidCrystal Library that we will be using to control the LCD from the Arduino uses the driver as its standard. Does it have 16 pins? If the answer is yes, you should feel pretty comfortable that it is compatible. If you can’t find any documentation to support whether or not the LCD you want to buy will work, then check the pin out. This driver is so common it is pretty much the standard. ![]() “Your LCD must be compatible with Hitachi HD44780 driver.”īut don’t worry. Let’s cut to the chase – the MOST important thing you need to ensure when you are buying your LCD is that is compatible with Hitachi HD44780 driver. The LCD screen itself is a subcomponent of the module, which includes other components and circuitry that make interfacing with the LCD screen far more accessible. This is because, when you buy LCD screens – you are more than likely going to buy it as a “plug-and-play” module. Notice some verbiage as we talk about LCDs, you will keep seeing the two words “LCD Module”. What to consider when buying an LCD module for Arduino (If you already have an LCD skip to the next section) Want to jump-start your Arduino skills? Click here to join our 12-part HD Video Course.
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