Hello,

I recently bought the temperature control board here for TWR215ESSDP, the problem is that the ° F (Fahrenheit) temperature is set.
I tried all the combinations to pass it to celsius but I did not succeed.
5 seconds pressed the light key

Can someone help me? ....... on eeprom I have found nothing writing is 32 pin.

https://www.compactappliance.com/ed...d-pcb-and-display-board-part/TWR215ESSDP.html

 

Hello,

You just did a hyjack on someone elses thread:
Repair thermoelectric cooler

I moved your post to a thraed of your own.

Bertus

 

Try the temp up and down buttons at the same time for several seconds.
Some are only in F'

 

The service manual for the refrigerator that device serves does not mention how to change to Celsius.

https://support.edgestar.com/hc/art...ar TWR215ESS Service Manual V1.0 02022018.pdf

I suspect you are out of luck. Why do you need the temperature in °C? Isn't the correct temperature for wine 55°F?

 

this is pcb board There is nothing written on the 32-pin microcontroller.
Someone can help me identify, I can read it in the programmer.

 

Even if you knew which MCU that was and could read its code (assuming it is not protected), the resulting hex file will not be much help. Sure, commercial entities have been known to even decap MCU's to get at the code and then have expert coders decipher it to steal IP. That is an expensive proposition.

It would probably be easier and a real kludge to read the data from the LED s and convert that to °C. The easiest approaches would be to find a controller that reports in °C or build your own. I doubt very much that the code in this device is particularly clever, but nevertheless, it is protected IP.

What do you need to control with it? Are you simply trying to get the wine cooler for which it is designed to report in °C?

If you can post an equally detailed view of the top of the board, there may be obvious pins or pads that can be used to program or read the MCU.

 

 

I don't see any obvious programming pads or pins. What is the number on the MCU?

 

It does not write anything on the MCU
I have identified up to 5v and GND

 

If that chip has had its ID erased, you are out of luck. There are lots of 32-pin MCU's available. Moreover, a manufacturer who would remove the label probably also protected the chip from being read.