NFC Tagboard - Using NFC Tags, Grafana, and Docker
NFC Tags - Tracking tasks last completed Trying to track when you last completed a long-dated task can be challenging. Writing them on a calendar makes for difficult searching. Heavy apps are overkill. So what’s a person to do? A simple soltution - use NFC tags which are pre-loaded with custom JSON, drop a little golang server, and Docker persistance with MySQL, along with a Grafana UI to easily manage tracking of tasks. Continue reading
I'm Back!!! Diving into Rust!
Noobie to Rust? Let’s get started!! So you want to get into rust? Sure, why not. Let’s do it. The setup Assuming you’re on a Mac, let’s get rust up and running so you’re ready to rip into learning the language. We’ll use rustup to install rust. This is the best way to manage your rust environment and toolchain. Not only can you manage toolchains using rustup, but also add-in components to make the experience a lot more enjoyable. Continue reading
Getting func(y) with Channels
Here’s a little golang puzzle Take a look at the function below that computes a mystery value for the function $f(x)$. Any idea what the function is? Take a close look at the first line where we create a channel. Notice that the channel isn’t some boring int or string channel. No, this is a channel of type func(int, chan int, chan bool). Wait what??? That’s right, this channel takes a function that takes an integer and two channels as function parameters. Continue reading
OS X VPN client pppd host route configuration on post-interface connection
VPN Client PPP daemon configuration Recipe: Configure Default Host routes after a specific VPN connection has been established Solution: In order to configure the host (or network routes, although I’m solely interested in routing specific hosts between my two sites), we need to create a file with the following commands in /etc/ppp. #!/bin/sh # VPN_GATEWAY is the remote address of the vpn tunnel # when ppp executes this script it will pass several values to it # $5 will hold the remote gateway VPN_GATEWAY=192. Continue reading
Baby it's Cold Outside -- How Cold? Use an SHT31 and See!
ESP32 and SHT31 Temperature and Humidity Sensor Secure Web Server In this blog post, I follow-up on the ESP32-IDF development and demonstrate how to incorporate an i2c device to measure the temperature and humidity. Specifically the SHT31. First, let’s do it plain-jane vanilla. We’ll incorporate the i2c device and simply display the measurements to the serial terminal through the uart. Next, we’ll make it more practical and send the data over the wifi network to a service that makes it convenient to visualize the time-series data. Continue reading