Search found 21 matches

by lakindu93
Mon Oct 20, 2014 9:07 pm
Forum: Arduino
Topic: MQ7 & MQ135 Gas Sensors
Replies: 6
Views: 39789

Re: MQ7 & MQ135 Gas Sensors

Since the sensor was built to given a resistance to a certain pressure of CO, I'm not too sure it is possible to get an exact ppm value. Need to do a good literature survey on this. Most of the articles in the internet don't give direct information as well as the datasheet. However, I found followi...
by lakindu93
Fri Oct 17, 2014 8:16 am
Forum: Arduino
Topic: MQ7 & MQ135 Gas Sensors
Replies: 6
Views: 39789

Re: MQ7 & MQ135 Gas Sensors

anyone having coding related to the MQ7 and MQ135 to get the ppm values from sensor readings...?
by lakindu93
Wed Oct 15, 2014 9:40 pm
Forum: Arduino
Topic: Useful list of Gas sensors
Replies: 3
Views: 32262

Re: Useful list of Gas sensors

Good post....
by lakindu93
Tue Oct 14, 2014 9:18 am
Forum: Arduino
Topic: MQ7 & MQ135 Gas Sensors
Replies: 6
Views: 39789

Re: MQ7 & MQ135 Gas Sensors

If your application is automobil then you need oxygen sensor too. Because parameters would change due to oxygen concentration.So this question is all about sensor calibration right ? so it's sensitivity graph. And please note that it's x and y axes are on logarithmic scale. So sounds like the the s...
by lakindu93
Mon Oct 13, 2014 10:33 pm
Forum: Arduino
Topic: MQ7 & MQ135 Gas Sensors
Replies: 6
Views: 39789

MQ7 & MQ135 Gas Sensors

?? ??????? ??????? ? MQ7 ?? MQ135 ???? Sensors ???????? ???? ?????? CO(Carbon-monoxide) ?? CO2(carbon-dioxide) ???? ???? ??? ??? ???? ?????????? ????... MQ7 - CO MQ135 - CO2 ?? sensors ???? arduino compatible module ???? ?????? ????????... ?? ???? Sensors ???? ?? ?? ????????... ???????? CO ?? CO2 mi...
by lakindu93
Wed Sep 24, 2014 12:40 pm
Forum: Arduino
Topic: Update Online Database using GSM/GPRS Shield
Replies: 27
Views: 129492

Re: Update Online Database using GSM/GPRS Shield

You might like to try this method... https://robot.lk/viewtopic.php?t=1547 I think I have forgotten to answer to the following question. what is this <mids> and <dcss> ? +CSCB Select Cell Broadcast Message Types This command selects which types of cell broadcast messages are to be received. (GSM 07...
by lakindu93
Sun Sep 21, 2014 9:05 pm
Forum: Arduino
Topic: Update Online Database using GSM/GPRS Shield
Replies: 27
Views: 129492

Re: Update Online Database using GSM/GPRS Shield

You need port forwarding when you need to use your home router. For dynamic IPS. Even the IP address is dynamic you could assign a static domain name over [ CNAME record ]. refer: http://en.wikipedia.org/wiki/CNAME_record so then you could refer to ddns.org free dns name from your cname record. But...
by lakindu93
Sat Sep 20, 2014 8:18 pm
Forum: Arduino
Topic: Update Online Database using GSM/GPRS Shield
Replies: 27
Views: 129492

Re: Update Online Database using GSM/GPRS Shield

While Semi has given lot of information on that, I would like to ask 'why not use a shared/Virtual or dedicated server for this?'. Server space had become cheaper over the years and you can buy a cheap shared hosting server for about Rs. 500 per month. If you get a domain registered and assigned to...
by lakindu93
Sat Sep 20, 2014 8:13 pm
Forum: Arduino
Topic: Update Online Database using GSM/GPRS Shield
Replies: 27
Views: 129492

Re: Update Online Database using GSM/GPRS Shield

?? PC ???? ????? host ???? ????? mysql database server (local database ????), EFcom GPRS/GSM shield ?? ???????? ???? access ????? ??????? ?? ??????? ??? ?????? ?????? ???? idea ???? ????????... Directly. First you need to shift your database server into your DMZ zone and then enable it for the worl...
by lakindu93
Wed Sep 17, 2014 7:19 pm
Forum: Arduino
Topic: Update Online Database using GSM/GPRS Shield
Replies: 27
Views: 129492

Re: Update Online Database using GSM/GPRS Shield

?? PC ???? ????? host ???? ????? mysql database server (local database ????), EFcom GPRS/GSM shield ?? ???????? ???? access ????? ??????? ?? ??????? ??? ?????? ?????? ???? idea ???? ????????...

Go to advanced search