ESPimatic does not send, DHT22- Data

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Hi, I have a problem somehow with my second ESP. The second ESP sends no data from the DHT22. A relay and a DHT22 is connected to the second ESP. The WiFi is connected. The relay can be turned without problems. The second ESP has the same settings as the first. The first sends the data from DHT22. And pimatic, it receives. Not the second.

using the same gpio as on the first one?
same esp chip? if not, maybe a gpio change will help. or change the dht from the non working to the working esp to exclude a faulty dht

Thanks for the reply.
I have replaced the GPIO, changed the DHT22 - without success.
Then I removed the relay from the settings and the DHT22 has sent the data.
The problem seems to be the combination of DHT and relay. I had noticed that the WebGUI mir shows sometimes closed the arrows, at relays there are not.

Example image:
Also the unused GPIO, even if they are not used and not set are seemingly occupied the software.

I have tried the GPIO in the settings of the relay to use 5, 6 and 7 (There are only 4 GPIO) and hope to outwit the ESP. But now must I him completely new Flash. He does not start.

@koffienl
Maybe you have an idea?

which esp do you use?
i have a wemos d1 mini and use almost all gpio on it without issues.
https://blog.pimatic.org/pool-pump-control-and-balcony-lights/

@leader21
I use the “small”, ESP8266-01, with a maximum of 4 GPIO. And 512kb.

Nice blog. And a beautiful illuminated house number.

thx
not sure if espimatic can handle the two additional gpio on the esp01.
usually you are having gpio0 and gpio2.
so you tried with io 1 and 3 i suppose?

@leader21
I use only GPIO 1 and 2. I’ve read that you could use as a GPIO TX and RX. Therefore I tried GPIO 5 to 6 and 7 in the system settings from ESPimatic. To allocate the 4 possible relay contacts.
I haven’t tried GPIO 1 and 3.

Now I have the ESP flashed new. Befor I did, did I get the following in the serial monitor (Arduino IDE) as a continuous loop.

Connecting to :
*******
.......
Connected to *******
IP address: 192.168.178.28

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x4010f000, len 1264, room 16 
tail 0
chksum 0x42
csum 0x42
~ld
Connecting to :

The simple flashing * .ino has had no success. First, I had to delete the memory with the esptool.

sudo ./esptool.py --port /dev/ttyUSB1 erase_flash

What GPIO numbers are set available in the GPIO Configuration on ESPimatic ?
Can you post a screenshot of the DHT config and relay config (and perhaps the GPIO config) ?

Some other approach : do you see the DHT temmp/humidity values on the root page of the ESPimatic ?

@koffienl
Hi, here are some screnshots. If the relay in the config is active, the temperature of the DHT is gone.

I have used this circuit to connect the relay.

Thanks. So the issue is the DHT is not recognized at all.
The relay is working fine and the DHT is not.

The DHT has 4 pins : VSS, Data, NC, GND.
Did you connect the VCC on DHT to VCC and CH_PD on the ESP ? Did you use any resistors between DHT and ESP ?

@koffienl
I have connected the ESP like this.

VCC and CH_PD has the bridge.

I have no resistor between ESP and DHT.
So are my connections:
ESP - DHT

VCC - VCC
GND - GND
GPIO - DATA

It works fine with my first ESP (without relays).

Should I put a resistor between VCC and DATA? Maybe 10 k?

And if you remove the relay, everything works?
(please explain how you remove the relais, is it by physical removing connections or only removing from config ? )

As far as I know you do not need a resistor for a DHT22 (but I don’t have a DHT22 so didn’t test it).

@koffienl
It is enough if I disable the relay in the config. Then I receive data from the DHT.

@koffienl
I’ve re-enabled the relay in the config. Funnily enough, I now get the data of the DHT. I was watching it some time and the data is still coming.

Something else still boggles me. When I opened the relay1, then the icons show in the root to see view as shown in the picture.
R1 - open
R2 - closed
R3 - closed
R4 - closed

When I plug the relay1, all relay change their status.
R1 - closed
R2 - open
R3 - open
R4 - open

A GPIO is assigned to only the first relay in config.
It may be that the software of relay settings appeals to all GPIO? And that therefore this error with the DHT is?

Little test : can you set GPIO4 and GPIO5 as available in the GPIO config?
Besides I don’t have a DHT or ESP-01 I can’t reproduce your relay issue with a ESP that only has 2 relays.

Also : could you try a Reset from the Configure -> System menu ? This will reset ALL settings on the ESP, including wifi!!
Bu this will make sure everything stored in the EEPROM is deleted. Just curious id this would solve the issue.

Hello, sorry for my late reply. I had already configured GPIO 5 some time ago with success of a bootloop of ESP. (The ESP 01 has only 4 GPIO)

But now the ESP with relay and DHT works fine for over a week.
powered by pimatic and ESP

Just stupid if you don’t know what problem it was. I can’t even say why, I have nothing changed on the building.

hehe! that’s a really nice example of what you can do with pimatic / espimatic
glad to hear that it works now