First: I now calculated the values for the second ESP. I added a value x to all current values (the same) so that the temperatures fit. The scaling is the same as in ESP1. It seems to work with a constant temperature at the moment. Is this a way to do the calibration? The behaviour of the NTC shoul...

First: I now calculated the values for the second ESP. I added a value x to all current values (the same) so that the temperatures fit. The scaling is the same as in ESP1. It seems to work with a constant temperature at the moment. Is this a way to do the calibration? The behaviour of the NTC should...

Placing the capacitor "on" the ESP is exactly what I meant, as close to the ESP as possible :) Yep, with 'oversampling', the analog pin will be read quite often and being averaged. Also the max. and min. value seen in that period will be left out to filter out 'spikes'. As linked by Ton: ...

Hello, i just connected the second ESP to my built in NTCs but the value which are measured her differ quite a lot. The temperature is the same at the moment (about 67 degrees) but the ESP1 is measuring a current of 992 and the ESP2 is measuring 1024. As i copied the values (8) from ESP1 to ESP2 the...

The 100 nF transistors are in now. I put them "on" the ESPs. Now i have to figure out the average thing with "stats" and how to send the average value with mqtt to ioBroker. The documentation (links above) didn't really help till now for me. Just a question: The setting for Overs...

Meanwhile i made three seperate litte boards and now three ESPs with the A0 input are working quite well. Some litte problems, but quite qood. The measurement of temperatures is really good, about 0.5 degrees more or less than another thermostat. Here my settings in ESP Easy: lcit_1.jpg lcit_2.jpg T...

Ok.

I am going from about 15 degrees celsius to 80. Is this a small range? If not what else will i have to do.

Thanks.

Hello, i now used the single analog input of the ESP8266 D1 Mini and built one NTC and 50 k@ Resistors. It now works much better in my first test. I am using 3,3 Volt (output D1 Mini) and i get an temperatur of about 16 degress 1,65 Volt. When i grab the NTC the voltage goes up and when not grabbed ...

Thanks! I will check that. What do you mean with „is just a tip“?

I now tried several resistors 22kOhm, 47 kOhm, 4,7 kOhm and the value is not really changing. It stays at 0,89..0,91. I also have some doubts because the value when no NTC or resistor is connected in on my self build board is also 0,90..0,92. It should be 0, or not? Is the ADS1115 not working? Shoul...

Sure.

At the moment my setup is not really working. The value measured jumps from 4850 to 4961 with the settings above on A0 - GND. It does not really change with changing temperatures. When i put the function in for calculating the voltage the value does not move anyway (always 0.92). Really disappointin...

Ok. That makes sense!

I will solve this issue in iobroker.

Thanks a lot.

Hello, at the moment i get some values of an ESP8266 D1 Mini with one decimal (e.g. 21.1, 23.4, ...). But when the decimal is "0" the value is transmitted via mqtt without a decimal (0). Is there a way to this with ESPEasy or must i script this with JS oder Blockly in IOBroker? Thanks for ...

Ok, i will check this. So the curve of my NTC 50k (above) is not linear, so i will try with 2 calibration points (at 20 / 80%). I think my range would be from 10..90 degress celsius. Can you help if it would be also acceptable to use an 47k resistor with the 50k ntc? It seems to be really hard to ge...

Now it looks better.
and the volt value now looks much better.
Now how can i get degrees celsius out of the value and do the calibration?

Build it up. Connected A0 und GND to the ads1115 board (and also 3,3V and SDL and SDA) and i now can see this: 2022-12-14_14h47_46.png When i touch the NTC it changes: 2022-12-14_14h49_06.png The settings are as follows: 2022-12-14_14h46_26.png Can you now help why there is no voltage value? And how...

Hello all ;-), i now have the ads1115 board and the esp8266 connected and espeasy is installed. I'm now building the breadboard and going for the settings with espeasy. For the testing i am using a 47k NTC and a 47k resistor. But my build-in ntcs have 50k. Until now i haven't found a 47k resistor. B...

Ok, got it.

And this is how to connect them:
Perfect. Going to order and then i'll be back

I think placing the 100 nf caps would be more difficult.

Great idea! Thanks. I will order this board. Set up my test board and than i will surely ask some questions again how to this "calibration" will work. The board cannot be used with the D1 mini? I have to buy also an ESP32? Really, really a big thank you to you all! I think i will get this ...

Ok, i'm getting closer.

Calibration is done by measuring a temperature (with another temperature sensor) and the settings / adjustments are done in the ESPEasy Software that the temperature fits.

I have 1% resistors .

I want to measure three temperaturs in a buffer storage for my house heating. 2022-12-10_13h22_10.png There are three temperature sensors already placed in the buffer (top, middle, down). I can't really get them out and change them or place another sensor because this is really hard. So i asked the ...

Cool, getting closer I think. :D Really cool! So this would be my setup? 2022-12-10_13h09_58.png I will try this first with a 47k NTC and a Rs with 47k on my breadboard. Getting the ESP D1 Mini Working transmitting the temperatures to ioBroker and so on. Then i will go for my use case with the buffe...

Thanks for your advices. I now put into a new circuit plan. 2022-12-10_12h52_52.png Perhaps you can have o look and help me with the resistance value of Rp. Thanks ;-). My range of interest would be 10...90 degrees celsius. So the middle woud be about 50 degrees celsius. This means a resistance valu...

So i will begin to build a test build with another 50 k ntc in this setup: 2022-12-10_08h47_20.png A 50k resistor parallel to the NTC, connected with GND and A0 from the D1 Mini. 3,3V Input also from the D1 Mini. And then i can adjust the settings in ESPEasy on the D1 Mini? I need three D1 Mini late...

Hello, a am a beginner with ESPEasy. I have build three ESP8266 D1 mini with ESPEasy ony my own with 2-4 DS18B20 to measure temperatures on my heating in my house. This works gently with transmitting the temperatures to iobroker. I am displaying them in my VIS and recording them in the database for ...