You dont Need to Strip the voltage Regulator from the board. Just use the marked solder pad to feed the board with 3.3. This works fine for me.

Hi,

no problem at all. The humidity scetch is running fine with a pure atmega328p-pu and a DHT11.

I have build it on a breadboard for you to see if it is working:

As you see, the sensor starts and sends temperature and humidity value:

sensor started, id 99
send: 99-99-0-0 s=255,c=0,t=17,pt=0,l=5,st=ok:1.4.1
send: 99-99-0-0 s=255,c=3,t=6,pt=1,l=1,st=ok:0
read: 0-0-99 s=255,c=3,t=6,pt=0,l=2:M

send: 99-99-0-0 s=255,c=3,t=11,pt=0,l=8,st=ok:Humidity
send: 99-99-0-0 s=255,c=3,t=12,pt=0,l=3,st=ok:1.0
send: 99-99-0-0 s=0,c=0,t=7,pt=0,l=5,st=ok:1.4.1
read: 99-1-0 s=0,c=0,t=7,pt=0,l=5:1.4.1
send: 99-99-0-0 s=1,c=0,t=6,pt=0,l=5,st=ok:1.4.1
read: 99-1-0 s=1,c=0,t=6,pt=0,l=5:1.4.1
send: 99-99-0-0 s=255,c=3,t=0,pt=1,l=1,st=ok:62
read: 99-1-0 s=255,c=3,t=0,pt=1,l=1:62

Normally I am using a DHT22 on my selfmade board.

Andreas

Hi all,

the forcast is working as expected for a while now. It follows the pressure values from the device.

First diagram shows pressure and forcast. Looks like the calculation is ok.
But the weather doesnt know anything about the forecast 100% Humidity because it rains Dogs and Cats

This is no question. Just a little reminder about crystalballs

Andreas

15 minutes = 900 seconds. 20000 Nodes / 900 sec = 9550

I you configure the NRF24 to the Maximum of RF24_2MBPS you can transmit - in theory - 2.000.000 MBit / sec = 250.000 Bytes / sec.
250000 Bytes/Sec / 32 Byte Payload size = 7812 payloads/sec. Thats less that the requiered 9550.

And if you must concentrate a lot of Clients on repeater nodes. you are totally lost. Forget it.

How many measurements would you like to get in which Intervall.
I think you will get in serious trouble because all the nodes are talking wireless and this is not able to handle more than one client sending at the same time.
If you want to do this wireless you have to sync all the activity fro a central Point. So you must have a "Server" which polls the Clients to get the data.

Can you please describe what are you planing in more detail?

Hi all,

the forcast is working as expected for a while now. It follows the pressure values from the device.

First diagram shows pressure and forcast. Looks like the calculation is ok.
But the weather doesnt know anything about the forecast 100% Humidity because it rains Dogs and Cats

This is no question. Just a little reminder about crystalballs

Andreas

Perhaps this makes clear what happend:

https://cdn.sparkfun.com/assets/0/7/5/5/1/51eec304ce395f104c000000.png

If you have a look at the datasheet you see:

All voltage input (AC: 90 ~ 264V)

110 should work.

This could be a good start https://github.com/solarkennedy/equail

Perhaps my following sketch can help you: https://codebender.cc/sketch:98928
I use the same Setup to meassure the Level of the pellet store. There is a lot of dust in the Air and no even Surface. So a lot of "noise".
The digitalSmooth function tries to find the relevant values. My graph looks much better with it

Just enable the debug define. You will get the output to the console.
Or use the wireshark sniffer.

I have no problem with it. fhem as controler and mysql as DB is running on the same PI.
The Gateway is not even listed in "top"

Ultimate nRF24L01 range comparison – 38:17
— iforce2d