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Error "502 bad gateway" when accessing the bcMeter Interface

if you get a 502 bad gateway error, check PHP-FPM version in /etc/nginx/sites-enabled/default :

Correct line "fastcgi_pass unix:/run/php/php7.4-fpm.sock;" <- 7.4 to the version you see when entering "ps aux | grep php-fpm" in terminal.

The bcMeter does not connect to my WiFi

  1. Double check this procedure was done correctly and/or repeat it.
  2. Look at your router interface if there is a new device "raspberrypi" or similar. If you ever had another raspberrypi connected to your wifi, the dns of your router might have assigned another hostname to the raspberry.

The sensor values are very low and do not change

  1. Check voltages on LED and Sensor

Any other issue

  1. Let me know, I'm glad to add it here. Mail description and screenshot to