/tags/oled/Recent content in OLED on JKTDEV.CO.UKHugoen-usWed, 24 Jun 2026 22:09:37 +0100/posts/buildingblockspt23/Wed, 24 Jun 2026 22:09:37 +0100/posts/buildingblockspt23/<h2 id="improving-the-ec11-encoder-and-rs485-test-setup">Improving the EC11 Encoder and RS485 Test Setup</h2> <p>Today I mainly concentrated on improving the transmitter-side and receiver-side software for the EC11 rotary encoder test setup.</p> <p>The setup uses the Digital IO Expander board to read the rotary encoder and push button, sends events over RS485, and displays the result on a Raspberry Pi Pico 2 W receiver with an OLED display.</p> <figure><a href="testsetupdisplay.jpg"><img src="/posts/buildingblockspt23/testsetupdisplay.jpg" alt="Test Setup with OLED Display"></a><figcaption> <h4>Test Setup with OLED Display</h4> </figcaption> </figure> <p>The aim was not to build a complete production-ready control system, but to validate the hardware and prove that the boards could work together in a simple but realistic integration test.</p>/posts/buildingblockspt22/Tue, 23 Jun 2026 21:33:42 +0100/posts/buildingblockspt22/<h2 id="decoding-an-ec11-rotary-encoder-over-rs485">Decoding an EC11 Rotary Encoder over RS485</h2> <p>Today I worked on decoding an EC11 rotary encoder, sending the result over RS485, and displaying it on a receiver setup.</p> <p>The receiver setup consists of:</p> <ul> <li>1 x Raspberry Pi Pico 2 W</li> <li>1 x RS485 receiver board</li> <li>1 x SH1106-based OLED display</li> </ul> <p>The transmitter setup consists of:</p> <ul> <li>1 x EC11 rotary encoder on a small prototype PCB</li> <li>1 x Digital IO Expander Board</li> <li>1 x Raspberry Pi Pico 2 W</li> <li>1 x RS485 transmitter board</li> </ul> <p>The basic idea was to read the A and B pins from the rotary encoder, decode the direction of travel on the transmitter side, send a simple message over the RS485 link, and then display the result on the receiver.</p>