Once everything has been connected and the software is ready, it's time to do a little test of our new system. The demonstration can be done by using a lighter. In fact, our system is really sensitive to the gas inside the lighter!
First of all, we have to check the system configuration:
root@beaglebone:~# ./my_dump.sh config n v mq2_gain 0.125 mq2_off 0 mq2_th_ppm 150 mq4_gain 0.125 mq4_off 0 mq4_th_ppm 150 mq5_gain 0.125 mq5_off 0 mq5_th_ppm 150 mq7_gain 0.125 mq7_off 0 mq7_th_ppm 150 sms_delay_s 300
Note that I used a very weak calibration setting; however, these are okay for a demo.
Then, we can take a look at the system's current status:
root@beaglebone:~# ./my_dump.sh status n v mq2 73.5 mq4 121.75 mq5 53 mq7 80.5 alarm 0