Solar Mike Guru Joined: 08/02/2015 Location: New ZealandPosts: 1162
Posted: 05:41am 10 Oct 2021
Interesting they publish specs using an external low noise voltage reference, BUT the board as sold doesn't have this, it uses the noisy switch mode 3.3V supply rail. No wonder the module is so cheap.
First thing I did was fit the LM4040 3V reference IC for the ADC reference, will see how that goes.