DHT: let´s grow the WIKI, by bullshit born in praxis

[BerndJ]

Hi,

I think it´s time to expand the wiki, because failures can, should and whould be produced for once, the second one is one to much!

we need a tab under Hardware:
bullshit, born in praxis

I begin with DHT11

http://www.esp8266.nu/index.php/HumiditySensor

avoid to use it on GPIO15, why?
in boot mode the processor is loking at GPIO0, GPIO02 and GPIO15 to select the forced boot mode.
We need High level on 00 and 02, Low level on 15.
If the DHT just in this moment would like to be send High Level the ESP does´nt see ESPeasy, .... you can dice by a reset for the next play.

By the way: what value is preferred to the pull-up resistor?, we should explain that, I use 4k7 and had no problems.

funny wishes

BerndJ

[BertB]

I modified the Wiki a bit.

[BerndJ]

Hi Bert,

thx a lot, looks nice and hope it helps some-, one, more ore everybody.

Next:

http://www.esp8266.nu/index.php/TemperatureSensor

... can read ___ a ____ Dallas ....

... Since Version V022 you could connect up to 12 Sensors. a problem regarding negative values are solved since V032.

and regarding GPIO15 same problem.

mfg

BerndJ

PS: how long could bee the wire with 3,3 Volt and with how much sensors u used. Who has the longest distance? in Praxis without errors.

Values out of the praxis like: cable, Power voltage, Schematics at 5 Volt if needed, lenght and how much in which distance could bee added.