Regarding RL value about arduino-mysensors-contribs

[empierre]

This does not work this way, each sensor has its own value ...

…

On Fri, May 25, 2018 at 1:07 PM JAYON17 ***@***.***> wrote: #define RL_VALUE (990) -- Hi may i know the RL value of 990 ohm is suitable for all of the sensor that you used? Because for MQ2 when i refer to datasheet it mentioned the RL value around 5kohm but for the other MQ sensors such as 6 having a 20 kohm — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#30>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AG8ximA_qzoRcCGbIGsAsicaekAFNl6dks5t1-X3gaJpZM4UNymB> .

[JAYON17]

Alright, btw how do you able to get this 2 value
Ro0 = 4.300; //MQ2 3.83 this has to be tuned 10K Ohm
RL0 = 2.897; //MQ2 Elecfreacks Octopus
Can you show me the equation to find this value?

[empierre]

some may come from others, remember that no MQ sensor is to be relied on first, and then that no calibration can be done without known gas concentration.

only the "clean air calibration" method can be used, given you know concentration in the air around you.