Using UART on CircuitPython

So, let’s talk about those pin connections for your UART setup.
You’ll find the TX pin tagged as Y9 and the RX pin as Y10 .
To get these pins connected to your PC, you’ll need a USB to TTL or UART to TTL converter.
Just remember to follow the pin map we shared earlier to ensure you have everything connected correctly..

First things first, you need to connect the ground wire to get the setup rolling.
This is usually the black wire, which we call GND, and it works alongside the TXD and RXD wires.
Just plug that black wire into the GND terminal at the top of the board to make sure everything is properly grounded.
Trust me, this connection is crucial for your circuit to work smoothly.
Once you’ve got that black wire all snug, you can move on to your next step!.

When you’re setting up data transmission, the gray pin labeled TXD goes into the RX pin at Y10.
This might seem like a small step, but it’s super important for getting your data flowing smoothly between components.
Next up, you’ll want to take the white pin marked RXD and connect it to the TX pin at Y9, then make sure it’s securely plugged into your PC.
Remember, double-checking all your connections to ensure they’re right and secure is key.
It’ll save you time troubleshooting later on!.

Setting up UART communication in CircuitPython is pretty straightforward! First off, you connect your CircuitPython kit with a micro B adapter.
It’s important to wipe the previous code and get ready to input your new UART code.
Once you’re set, the process kicks off by importing the necessary modules.
In this setup, you’ll configure UART with a 9600 baud rate, setting TX on pin Y9 and RX on pin Y10.
Characters you type will be transmitted as bytes, and you’ll loop a message like “Hello, device my art” to keep reading data on UART, focusing on up to 64 bytes at a time.
And don’t worry—there’s a default timeout of 1 second in case less data comes through before it processes what it has..

To kick things off, you’ll want to use the CoolTerm app to get a good look at the data flowing through the console.
First things first, make sure your CircuitPython kit is plugged into that USB to UART TTL converter port—it’s essential for everything to work smoothly.
Once you hit that reset button, you should see “Hello, Device Mart” pop up in the Serial Monitor, confirming that things are set up right.
If you type in “hello” or “nice to meet you,” you’ll see them show up on the screen, all lively—this just shows how well the interface functions! These steps really help you take control of the UART in the CircuitPython realm, making sure everything runs like a charm..