At the entrance I have to admit that it's a great job with this soldering iron!
Small, shapely, cheap to build:]
Only the LiPo voltage sensor and the buzzer are missing (turned off in the menu, not removed from the plate).
I have a similar problem with the soldering iron, exactly the temperature reading is too low, on the OLED shows 200 ℃ and after transferring the tip to a tested soldering iron (v3) it shows 500 ℃ +.
I have made 3 devices but unfortunately only 1 works properly (about 20 ℃ difference between the external sensor and the measurement on the soldering iron).
All components are the same (I have 20 sets of all components).
The connection between the tip and the PCB is good, I especially added some solder at the connection points.
24v 5a power supply.
I have not tested OPAMP in all but I think that there are small probabilities of 2 damaged components underneath.
Grottos from Ali, but if the temperature reading is okay on the soldering iron, it's probably not the main tip.
Any idea what could be caused by this?
Regards and I am waiting for help:]
I checked OPAMP in the serial port monitor and the temperature is lower by about 180℃. OPAMP for exchange?
I also noticed that OLED works slower than it should (start logo moves with lags, temp changes very slowly)
(for the rest who has no knowledge about checking in serial monitoring:
Examples> Basics> Analog read serial
We check the pin (int sensorValue = analogRead (A0);), we load on arduino, open the serial port monitor, check what Ardu sends us.)