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Aha, i got it now. But the panel and it's specifications aren't my problem now. I'm still trying to just control the mcp4131 digital potentiometer using nodemcu, i'm still in step one and i have problems with it.
i googled the message and found that it is an error caused by a watchdog reset
the panel is 60 watt. the open circuit voltage (Voc) is 22.57 V, and the short circuit current (Isc) is 3.58 A.
the schematic is attached to the main post.
My final aim of the project is to change the resistance remotely (through wifi) in order to study the IV characteristics (voltage versus current at different loads) of a solar panel. I'm using the LED just as an indication for changing the resistance to test the code. Forget about the LED, now...
That's my circuit diagram.
I'm using the mcp4131 with wemos in order to change the resistance remotely to use it in studying the IV characteristics of a solar panel. I'm using Arduino IDE to program wemos board. The error message appears in the serial monitor of the arduino ide. I made some...
Hello everyone,
I'm trying to make a digital potentiometer using mcp4131 and wemos d1 mini dev board in order to use it in studying the IV characteristics of a solar cell remotely. The mcp4131 digipot uses SPI communication. I have used a simple Arduino code for testing. the code works correctly...
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