This HOW-TO is an easy step-by-step guide to getting a MySQL server working on a Raspberry Pi including setting up user authentication. If you haven’t yet set up your Pi here’s a HOW-TO: http://tinab.blog/how-to-headless-pi-easy-setup You can skip this step but it’s a useful base that ensures a good start: http://tinab.blog/how-to-install-a-standard-base-linux-server-on-raspberry-pi Start by updating (if you …
This HOW-TO is an easy step-by-step guide to getting an MQTT broker working on a Raspberry Pi including TLS and user authentication. If you haven’t yet set up your Pi here’s a HOW-TO: http://tinab.blog/how-to-headless-pi-easy-setup You can skip this step but it’s a useful base that ensures a good start: http://tinab.blog/how-to-install-a-standard-base-linux-server-on-raspberry-pi Start by updating (if you …
Datasheet Just notes to ensure I know it can be triggered simply with 5V and doesn’t need any external circuitry to make it work.
How to use GPIO2 for input (with a signal that is high by default or low by default while the chip is booting) or output (whether the output is driven high or low to trigger). Booting requires GPIO2 to be high but pulling-up disables it for various uses – especially detecting a high input signal …
NPN – eg 2n3904, 10k on base, 1k on collector Use when the IO-pin has to be up by default PNP – eg 2n3906, 1k on collector Use when the IO-pin has to be down by default, eg IO2 on ESP8266 for boot conditions Make some notes about what happens, and some code for an …
Priority Symbol 1 ++ 1 — 1 () 2 ! 2 (typecast) 3 * 3 / 3 % 4 + 4 – 5 <, <= 5 >, >= 6 ==, != 7 && 8 || 9 all assignment operators One restriction on the switch expression is that it must evaluate to an integral type (int, char, short, long, long …
Make a board as per these PDFs Make aluminium bits to secure PSU. Mount the PSU in the wooden board. 3D Print fuse holders as per this STL Mark copper strips as per this DWG and these photos Drill 1.5mm holes from the marked side Drill 3mm holes in the 12mm pieces – slowly so …
A light switch that can be incorporated into a 2-way household switching circuit to add WiFi control while leaving the existing switching working in a way that requires the user to have no knowledge of the WiFi switch and allows installation using wiring conventions that are recognisable to anyone familiar with traditional 2-way switches. Troubleshooting …