ADS1115 and PT100 - EL skills needed
Posted: 21 Oct 2018, 18:08
Hello community
You may know BBQ. You also may know the company Weber. They build Grills for way to much money. So far, so well known.
I recently reverse engineered the Weber iGrill 3, which is in fact a pretty stupid Bluetooth thermometer with >>10m range for ~180€. So far, so well known.
Now, I want to create the same thing and improve. With ESPeasy, PT100 (they use 200k NTCs) and MQTT.
Therefore I added an ADS1115 with a sample PT100 (2wire for the beginning). I managed it, to measure the analog 3.3V thru henry's article.
Unfortunately I'm to stupid to calculate the Steinhart-Hart PT100 equation. Can someone help me with a correct T= formula please?
love, peace and ice cream
Lukas
PS: why can I add only 40chars in the formula input box?
You may know BBQ. You also may know the company Weber. They build Grills for way to much money. So far, so well known.
I recently reverse engineered the Weber iGrill 3, which is in fact a pretty stupid Bluetooth thermometer with >>10m range for ~180€. So far, so well known.
Now, I want to create the same thing and improve. With ESPeasy, PT100 (they use 200k NTCs) and MQTT.
Therefore I added an ADS1115 with a sample PT100 (2wire for the beginning). I managed it, to measure the analog 3.3V thru henry's article.
Unfortunately I'm to stupid to calculate the Steinhart-Hart PT100 equation. Can someone help me with a correct T= formula please?
love, peace and ice cream
Lukas
PS: why can I add only 40chars in the formula input box?