Hi, I am working on a project where I read an LDR with the NODEMCU ESP8266 board and I want to display the value on a Line Chart, I followed this tutorial https://www.youtube.com/watch?v=L--x96_m9pU , but I cannot figure out why my chart doesn’t display anything… also I do not have the “live” option to select… so, by default it is set to “h” and I have the message " No data available for this period ".th
if I want to display only the value, it works
, also the control of the LED works, only the chart doesn’t work,.did somebody faced also this problem ? could you help me ?
Thank you in advance!