https://coffeeandcontemplation.dev/tags/hacks/Recent content in hacks on Coffee and ContemplationHugo -- gohugo.ioen-usdev@gmail.com (dev)dev@gmail.com (dev)Mon, 14 Nov 2022 00:00:00 +0000https://coffeeandcontemplation.dev/post/2022-11-14-temp-logger-improvements-for-pi/Mon, 14 Nov 2022 00:00:00 +0000dev@gmail.com (dev)https://coffeeandcontemplation.dev/post/2022-11-14-temp-logger-improvements-for-pi/Part1 Part2 Using the on-board LED to monitor sensor reads The raspberry pi pico based temperature logger “hung” at times. It didn’t write anything to the file at all. But, it wasn’t obvious that it had stopped working. Initially, I had plans to turn on the on-board LED when writing to a file. But, more experienced programmers suggested that sensor_temp.read_u16() is more likely to be the blocking call. So turning on the LED before reading the sensor and turning it off after would give a clear indication.https://coffeeandcontemplation.dev/post/2022-11-09-plotting-temp-timeseries/Wed, 09 Nov 2022 00:00:00 +0000dev@gmail.com (dev)https://coffeeandcontemplation.dev/post/2022-11-09-plotting-temp-timeseries/So, there was this raspberry pi contraption to log temperature to a file. The next step is to plot this in a graph. We get a single column file of recorded temperatures from the raspberry pi pico. It is pretty easy to plot a graph from a two column file using gnuplot. If the filename is temp_log, all you need is: plot 'temp_log' with lines I was too lazy to find how to plot a single column file.https://coffeeandcontemplation.dev/post/2022-11-06-temperature-monitoring-with-rp-pico/Sun, 06 Nov 2022 00:00:00 +0000dev@gmail.com (dev)https://coffeeandcontemplation.dev/post/2022-11-06-temperature-monitoring-with-rp-pico/We bought a new Air conditioner for the house. It doesn’t feel like the AC is able to regulate the temperature to what we set. But, humans are often wrong about these kind of things. A simple thermometer would have done the trick - but we need time-series temperature data to verify the AC function. Enter - the Raspberry pi pico. It has a built-in ambient temperature sensor and supports micropython.