Hi, I want to ask you about the pzem-017 <7v circuit. Based on the picture, I tried to use a 5 volt power supply from the cellphone charger on the usb port <7, and the shunt resistor port side and the load were not used. just trying to connect the cellphone charger to the usb port only. Then I just tried to connect with the use charger cell phone to the USB port with the use charger cellphone Port USB < 7V I don't try installation on the side this the results that I get like this, why can't the power supply voltage be read in the range of 1 to 5 volts? I've also set the voltage parameters. are the clothes I used wrong? how is the actual circuit? give me a solution. thank you
