I am trying to get the Home_Weather_Display project working with Grove Pi zero.
It works fine if I use it with GrovePi and it, however, does not produce valid numbers when I use it with GrovePi Zero.
It shows -1, -1 similar to the issues reported in the discussion (
Raspi GrovePi Temperature&Humidity Sensor showing -1 -1 ).
I modified the script (https://raw.githubusercontent.com/DexterInd/GrovePi/master/Projects/Home_Weather_Display/Home_Weather_Display.py ) to use port 3 as I connected the DHT sensor to D3 using Grove Pi zero as shown below.
dht_sensor_port = 3
It works fine when I used GrovePi and Raspberryi 3 and it only shows -1, -1 when I switch to Grovepi Zero.