The Engineering Projects

Hello readers, we hope you all are doing great. Welcome to the 1st lecture of Section 4 in the ESP32 Programming Series. In this section, we will interface the ESP32 module with common Embedded modules(i.e. LCD, Keypad, RTC etc.).

In today's tutorial, we will interface ESP32 with a 16x2 LCD and will display data using both Data Mode and I2C Mode. LCD is the most commonly used embedded module in IoT Projects. It is used to display different types of data i.e. sensor readings, warning messages, notifications etc.

Before going forward, let's first have a look at what is LCD and How it works:

16x2 LCD Module

LCD(Liquid Crystal Display) is a type of electronic display module that is used in a wide variety of applications and devices such as calculators, computers, mobile phones, TVs, etc. There are different types of LCDs available for commercial use. Today, we are going to use the most simple one i.e. 16x2 LCD, shown in the below figure:

This 16x2 LCD has 16 columns and 2 rows, so in total of 32 blocks to display characters. Each Block can display a single character at a time. We can display text in different styles on this LCD i.e. blinking, scrolling etc. Another variant of this LCD is 20x4 LCD and as the name suggests, it has 20 columns and 4 rows and so can display 80 characters at a time. The operating principle of both of these LCDs is quite similar. So, if you are working with a 20x4 LCD, you can still follow this tutorial.

Let's have a look at the LCD pinout:

LCD Pinout

Both 16x2 and 20x4 LCDs have 16 pins each, used to control 7 write on these LCDs. Among these 16 pins, we have:

• 8 Data Pins(Pin7-14)
  
• 2 LCD Power Pins(Pin1 and 2)
  
• 2 Backlight LED Power Pins(Pin15 and 16)
• 1 Contrast Pin(Pin3)
• 1 Enable Pin(Pin6)
• 2 Selection Pins(Pin4 and 5)

LCD Pinout and its working is shown in the below table:

#include 
LiquidCrystal lcd(22,23,5,18,19,21);

void setup()
{
    lcd.begin(16, 2);
    lcd.clear();

    // go to row 0 column 5, note that this is indexed at 0
    lcd.setCursor(5,0);
    lcd.print("ESP32");

    // go to row 1 column 0, note that this is indexed at 0
    lcd.setCursor(0,1);
    lcd.print (" TheEnggProjects");
}

void loop()
{
}

#include 

LiquidCrystal lcd(22,23,5,18,19,21);

lcd.begin(16, 2);

lcd.begin(20, 4);

lcd.clear();

lcd.setCursor(5,0);

lcd.print("ESP32");

lcd.setCursor(0,1);
lcd.print (" TheEnggProjects");

Hello friends, I hope you all are doing great. In today's tutorial, we will have a look at the Common Mistakes to Avoid When Investing in Technology for Your Venture.

Tech tools can make or break a business in this day and age, regardless of the industry or niche a venture is in. As such, it’s vital to source the best possible technologies that will help you make your organization the best it can be and the most likely to reach its goals. As you invest in technology, it pays to avoid some common mistakes.

Mistake: Not Having a Plan

Many entrepreneurs have a detailed business plan they created when they began or bought their business, but they fail to plan much for technology. It’s essential to have a vision and strategy for your technological needs so you don’t keep jumping from one system, app, or product to another with no clarity on why you need certain programs.

A lack of planning can add to your total costs, too, since you’re more likely to have to keep buying new software to try to find the right things to suit your needs, rather than understanding from the start what’s required. Consider the various areas of your business and what you need in each.

For example, think about your sales and marketing processes, HR and payroll requirements, finance and accounting needs, where you’re up to with strategic sourcing in 2022, customer service plans, and more. Where possible, invest in tech tools that can be used across different parts of your organization and that will integrate well, too.

Mistake: Focusing on Trends Not the Best Fit

With so many different tech products coming out all the time, it’s easy to be like a bowerbird and get distracted by shiny new objects in this field that seem fun and interesting. However, focusing on trends and the latest gear rather than what’s actually the best fit for your company and needs is a common mistake.

Going down this path will mean you likely end up spending a lot more money than you need to on technology and buying devices or programs that aren’t suited to your business or are simply irrelevant. Instead, refer back to your tech plan to see if new products will provide the solutions you’re after and, if not, appreciate what they offer but don’t bother buying them.

If you feel called to test a new offering, at least sign up for a free trial so you don’t have to outlay money on it. You can always cancel after the zero-cost introductory period if you can tell you really won’t use the software or that it doesn’t do enough for your needs.

Mistake: Failing to Create a Budget

Another common mistake many business owners and managers make is not creating a budget for technological items at the start of the calendar or financial year. When you have a budget in place, you stop and think twice before signing up for a subscription service when it releases or the latest gadget you hear other entrepreneurs talking about.

A set budget specifically for tech goods keeps you on track financially and keeps you and your team accountable. Keep in mind, too, that every new tool you buy needs setting up and learning in some way, which is time-consuming. When you adhere to a budget, you’re less likely to end up getting bogged down with too many things to wrap your head around.

Mistake: Not Taking Security Seriously Enough

These days, hackers galore are continually working, and in ever-sophisticated ways, to break into networks and devices, steal data, lock and crash systems, and otherwise cause issues for individuals and organizations alike. As such, no matter the size of your business, it’s vital to take cybersecurity incredibly seriously.

Unfortunately, though, many people get so busy with general day-to-day tasks that they forget about this area or think it’s something they can consider later (a time that never really comes until the worst happens). If you want to protect your firm’s and customers’ data from prying eyes and stop hackers from charging you ransom or stealing money, you need to spend plenty of time and energy upgrading your company’s security processes.

Invest in quality, comprehensive security software and firewalls that protect devices and accounts. Ensure all computers and programs are kept updated at all times so there are fewer security gaps for hackers to take advantage of. Train your staff to be very careful about what links they click on and emails they open. They should choose solid passwords that can’t be easily guessed. Proper codes are at least eight characters in length, made up of a mixture of numbers, letters, and symbols, and changed every so often.

Other mistakes to avoid include rushing into purchases, neglecting free downloadable tools, and not testing systems enough before going live or otherwise implementing them. Be wary of considering price only when evaluating products, as customer support, security, scalability, and other factors also matter.

Technology can help us considerably to run our ventures but only when we invest in suitable options. Think about all these errors that others have made before you when buying tech tools so you can save yourself cash, headaches, and time.