Greenhouse control system

From uCtrl.net

Contents 1 The idea 2 Information 3 Collecting data 4 The graphs 4.1 Information 4.2 Example mrtg.conf 4.3 Example target bash script 4.4 Sharing log files 4.5 Graphs 4.6 Resources

The idea

1. Making a system that can monitor all climate factors, like: temperature, humidity, light intensity, EC, PH, CO₂ and O₂ levels.
2. Making the system able to influence the different levels using advanced automation. (not started yet)

Information

Using Mrtg in a Linux environment graphs for every: day, week, month and year will be made. The plan is to code a Linux application that will get the values from the modules and calculate the real levels. The result will be saved in a log file that Mrtg can read. The computer needs a UPS, that way no data is lost if a power loss should occur.

Collecting data

The data will be gathers using analog input modules with Serial I/O system standard. New modules with more analog inputs will have to be manufactured. I'm not quite sure how to get all the different sensors yet, but i am searching the internet for answers:)

The graphs

Information

Using the analog value log files it's possible to export the analog values into other applications, like Mrtg. Mrtg is primarily used to map network traffic on multiple routers. But it can be set up to make graphs for basically everything. Mrtg needs to run in a Linux environment.

Example mrtg.conf

For temperature sensor.

Title[temp_lr]: Living Room Temperature
PageTop[temp_lr]: <H1>Living Room Temperature</H1>
Target[temp_lr]: `/usr/mrtg/temp_lr` *10
MaxBytes[temp_lr]: 40000
Factor[temp_lr]: 0.001
YLegend[temp_lr]: mDegree 'C
ShortLegend[temp_lr]: 'C
LegendI[temp_lr]:
LegendO[temp_lr]: Degree
Options[temp_lr]: growright, nopercent, gauge, nolegend
YSize[temp_lr]: 150

Example target bash script

For reading the analog value log files.

echo 0
cat /usr/serialserver/serialserver-analog-value2-1.log
echo 0
echo Temperature

Sharing log files

The log files can be made accessible in Linux using smbmount

smbmount //server/serialserver /usr/serialserver -o password= r

Graphs

Temperature living room

Light living room

Resources

• The Multi Router Traffic Grapher