Search found 21 matches
- Mon Oct 20, 2014 9:07 pm
- Forum: Arduino
- Topic: MQ7 & MQ135 Gas Sensors
- Replies: 6
- Views: 41692
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...
- Fri Oct 17, 2014 8:16 am
- Forum: Arduino
- Topic: MQ7 & MQ135 Gas Sensors
- Replies: 6
- Views: 41692
Re: MQ7 & MQ135 Gas Sensors
anyone having coding related to the MQ7 and MQ135 to get the ppm values from sensor readings...?
- Wed Oct 15, 2014 9:40 pm
- Forum: Arduino
- Topic: Useful list of Gas sensors
- Replies: 3
- Views: 34001
Re: Useful list of Gas sensors
Good post....
- Tue Oct 14, 2014 9:18 am
- Forum: Arduino
- Topic: MQ7 & MQ135 Gas Sensors
- Replies: 6
- Views: 41692
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...
- Mon Oct 13, 2014 10:33 pm
- Forum: Arduino
- Topic: MQ7 & MQ135 Gas Sensors
- Replies: 6
- Views: 41692
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...
- Wed Sep 24, 2014 12:40 pm
- Forum: Arduino
- Topic: Update Online Database using GSM/GPRS Shield
- Replies: 27
- Views: 133554
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...
- Sun Sep 21, 2014 9:05 pm
- Forum: Arduino
- Topic: Update Online Database using GSM/GPRS Shield
- Replies: 27
- Views: 133554
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...
- Sat Sep 20, 2014 8:18 pm
- Forum: Arduino
- Topic: Update Online Database using GSM/GPRS Shield
- Replies: 27
- Views: 133554
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...
- Sat Sep 20, 2014 8:13 pm
- Forum: Arduino
- Topic: Update Online Database using GSM/GPRS Shield
- Replies: 27
- Views: 133554
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...
- Wed Sep 17, 2014 7:19 pm
- Forum: Arduino
- Topic: Update Online Database using GSM/GPRS Shield
- Replies: 27
- Views: 133554
Re: Update Online Database using GSM/GPRS Shield
?? PC ???? ????? host ???? ????? mysql database server (local database ????), EFcom GPRS/GSM shield ?? ???????? ???? access ????? ??????? ?? ??????? ??? ?????? ?????? ???? idea ???? ????????...