Second Prototype K Type Thermocouple Data Logger

[awalker]

Right so tried to get the first prototype to connect to a my local server, so I could log all data and create graphs
tried using Arduino + Ethernet Shield + MYSQLconnector to connect to my local mysql server.
Could not get it to work at all.

Stumpled on something called xively.com which is a free datalogging website, which graphs your data for you ish.
Opened my account a while ago so think you can still get free personal accounts
tutorial on how to do it

So using arduino + ethernet shield + xively arduino software you can upload data to the website
The website graphs the data in a nice graph, but it would be nice to customise it a bit

The nice people at xively have made it easy to customize your own webpage with custom graphs.
You dont even need your own website as you create an account on github and use the webpage area
tutorial

Currently using a BME 280 Bosch sensor to monitor the Air temperature, Pressure and Humidity.
As want to record local weather, to compare my thermocouple data against to see how much it effects the cool down of the oven
My page is atgithub

Its currently plugged in next to my pc in the house, so not true weather yet.

If it does not show current data change the time to 90days.
Or could be its not plugged in.

[dougclay]

Found it easier to keep it all local to the pi ... logging, graphing and serving it all in web pages via wifi.  Never thought to share the data in the cloud
RRD might not be a sql db but it is perfect for collecting data for graphing.  There are rrd libs available for arduino too you might want to check it out

Finally got around to making a proper board tho, which as first attempt at diy PCB, didn't turn out too bad...  its based around a pi-zero (shown mounted)
Still can't solder smd bits very well so left the max31855 chips on plug-in boards.  I will probably redesign again and try to make it easier to enclose and expand.  only need 1 additional gpio pin per max31855 chip and the pi has another 20 available so I have some more max free samples on order   




Cheers

DougClay

[awalker]

Very nice dougclay. Very good fit pcb. I used to design Oxnard in an old job. It's great to make your own custom pcb.

Will look at the red library.

Thanks

[dougclay]

I wonder how many tc amps I can support on one raspi.. max 31855s and 31856s


I guess I really will have to redesign that pcb a bit....

[awalker]

You can never have too many