Day of Random Pi Stuff

Today's Pi Jobs:

1) Prepare SD card for code club project so webcam can be fitted to the front of CamJam 3 robot. The kids have already built the bot and can remote control it via node-red. I used nginx for the first time with zero problems.

2) Reimage 4 new SD cards with latest Raspbian plus a few tweaks - pibrella and tightvncserver.

3) For home set up a camera on one pi that will send its pictures to another using a bash script and scp. The remote pi is feeding the pictures to the web.

I'll publish more details on these projects later.

Node Red

I've had a play with Node Red for the first time tonight. In a matter of minutes I was able to operate an LED through the Node Red interface, something I'd been wanting to do for a long time.

I couldn't be much simpler to use. I could do quite a lot of things in Node Red after just one evening playing around. The web side of things is still puzzling for now, with websockets and HTTP the next nut to crack.

I reckon I could control my home heating now just using Node Red and the right hardware.

LATER THAT SAME EVENING........

Couldn't let it lie so I had another play. Now the status of the LED can be output to wherever, e.g. twitter:

Output:

Copy and paste the code below if you want to try it (minus the twitter feed) - I used pin 11 (GPIO 17) to drive the LED.

[{"id":"d82e83d.f27d18","type":"inject","z":"2fc3a5ef.d03c5a","name":"LED on","topic":"","payload":"1","payloadType":"string","repeat":"","crontab":"","once":false,"x":295,"y":112,"wires":[["24897f1c.db768","1b8bd14c.e4742f"]]},{"id":"795f97e3.86a068","type":"inject","z":"2fc3a5ef.d03c5a","name":"LED off","topic":"","payload":"0","payloadType":"string","repeat":"","crontab":"","once":false,"x":297,"y":187,"wires":[["24897f1c.db768","1b8bd14c.e4742f"]]},{"id":"24897f1c.db768","type":"rpi-gpio out","z":"2fc3a5ef.d03c5a","name":"Yellow LED","pin":"11","set":true,"level":"0","out":"out","x":497,"y":146,"wires":[]},{"id":"4a42382a.b5bdc8","type":"debug","z":"2fc3a5ef.d03c5a","name":"LED status","active":true,"console":"false","complete":"payload","x":622,"y":286,"wires":[]},{"id":"1b8bd14c.e4742f","type":"change","z":"2fc3a5ef.d03c5a","name":"Create Human Readable Output","rules":[{"t":"change","p":"payload","from":"0","to":"LED is OFF","re":false},{"t":"change","p":"payload","from":"1","to":"LED is ON","re":false}],"action":"","property":"","from":"","to":"","reg":false,"x":356,"y":287,"wires":[["4a42382a.b5bdc8"]]}]