I got a new Raspberry Pi 4 as I’m looking to consolidate some of my old Pi’s and clean up my servers. To avoid issues with wearing out the SD cards I mount the root file system off an NFS NAS storage server.
Unfortunately I’ve hit a problem with installing Bind9 using the defaults when mounting root via NFS. When starting Bind9 I get the error
named[5466]: working directory ‘/var/cache/bind’ is not writable
I’ve put together a simple demo project of using both the BLE and WiFi radios on an Arduino Nano 33 IoT. Note, as there is only 1 radio you cannot use BLE and WiFi simultaneously. You can use one at a time, the order of how you make the various calls is important. Check it out on GitHub in SetWiFiPoC.
I’m working on tracking down and resolving a humidity problem in our home. While I have some basic measurements of humidity through our Nest Thermostat and a Canary device I want broader coverage so I can measure localized problem areas. The relatively new Arduino 33 BLE Sense looks to be a great device to meet my needs.
I’m creating a simple network combining BLE (Bluetooth Low Energy) and WiFi. I’m planning to use an Arduino 33 BLE Sense to measure the environment. the Arduino 33 BLE Sense doesn’t have Wifi. I’m planning to use an Arduino 33 IoT to act as a “gateway”, polling the Sense for measurements and periodically publishing them to an MQTT broker. The MQTT broker will be Mosquitto running on a Raspberry Pi.
I upgraded NetworkBrowser to Xcode 10. The biggest change is in starting to internationalize the application. With Xcode 10 there is a big focus on internationalization (this is a very good thing). But with this focus comes some warnings for layout builder. I found that I could resolve most of the issues after viewing this WWDC 2018 video Creating Apps for a Global Audience and using the stacked layout view.
The Asus AC-68U (like many routers) supports VPN functionality with the OpenVPN SSL based VPN software. Out of the box the VPN is very simple to configure. However, as delivered it uses quite a weak self signed certificate by Asus. Additionally because of the way the default certs are configured it really only securely supports a single client.
I searched the web and the documentation but didn’t find a good tutorial on configuring the router with your own certificates. With some trial and error I was able to work out how to configure the system with my own CA and Certs. This tutorial describes the steps I took to configure the system. In this tutorial I assume you have your own CA and some basic familiarity with CAs and Certs.
