We need to install several packages, so here we are: opkg update Connect the PWR terminal to the 5V (VCC) on the Arduino Dockīefore we proceed to the actual programs and their description, let’s ensure that we have all of the programs we’ll need.Connect the Load to the A0 on the Arduino Dock.Connect the GND terminal to the GND on the Arduino Dock.Plug the potentiometer into the breadboard and make the following connections:.Plug the Omega2 into the Arduino Dock 2 and power it up. ![]() We’ll be connecting the potentiometer (10K Trimpot) to an analog pin on the Arduino Dock 2, and we’ll reference it to VCC (5V) and GND so we can make sure the data is accurate. The HTTP server has a few GET endpoints to host a web page that dynamically shows the current position of the potentiometer. It also runs a Python program that listens to the MQTT topic for the potentiometer readings and simultaneously hosts an HTTP server. The Omega will be configured to automatically publishes the readings from the UART to an MQTT topic. To be more specific about the system: the microcontroller reads the potentiometer value and continuously transmits the reading via serial to the Omega. So, let us break down this into chunks and dive in! Sounding a little complex? No worries, we’ll guide you through each of the steps in detail. On top of that, we’ll add a web-server to the Python code with GET endpoints to display a web page and grab the latest potentiometer reading. Like last week, we’ll be using MQTT on the Omega to update a running Python program with the latest readings from the microcontroller. The Omega will host a web page that will show the potentiometer value being updated in almost real-time! This time, we’ll have the microcontroller reading a potentiometer and sending it the Omega over the UART. In the last week of the year, we’ll continue our series on the Arduino Dock2 as a co-processor for the Omega2.
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