PT1000 difficulties on TinyESP wifi controler

[janzilka]

Did someone successfully connected PT1000 platinum thermometer to analog input of TinyESP device running "ESP Easy Mega: TinyESP-WiC " ?

https://tinycontrol.pl/en/tinyesp/

Just connecting two sensor pins on analog input pin and gnd pinbon P1 port does not seem to work as the device configured as "analog internal" measures valies that do not correspond with resistivity change of the PT1000 sensor. The voltage neasured on sensor connected to the device gives 4.30 +/- 0.03 V on 29 degC or -15 degC and drifts randomly among 4.27 and 4.33 V.

Thanks for any response.

[TD-er]

Hmm I never knew there were units being sold with ESPEasy programmed on it.
Nice to know there are

Anyway for resistive sensors like the PT1000, but also thermocouple sensors you need a separate chip.
See: https://espeasy.readthedocs.io/en/lates ... /P039.html

[chromo23]

Anyway for resistive sensors like the PT1000, but also thermocouple sensors you need a separate chip.

But then @janzilka is out of luck i guess. There is no SPI support on this board as far as i can see.

[chromo23]

Ok... i looked closer. You could connect to SPI with the Pins i marked in the screenshot but GPIO15 is also connected to the Buzzer. Maybe its a good idea to disconnect the buzzer for that.

EDIT: and you´ll loose the OLED since one of the SPI pins is assigned to I2C

Bildschirmfoto 2023-06-30 um 11.31.28.png (888.02 KiB) Viewed 1384 times

[Ath]

That's not going to work, as one of the ESP8266 SPI pins (GPIO-14) is in use for the I2C connection to the display, and I guess that disabling the display is out of the question...