Can you post here the results of the following procedures:
i2cdetect command with the GrovePi & with the LCD RGB
i2cdetect command with the GrovePi & without the LCD RGB
Also, please make sure you have plugged in the GrovePi on top of Rapberry properly - if you haven’t, then things might happen.
Also, you should make a firmware update to the GrovePi.
If you don’t have the
Raspbian for Robots image, then I highly suggest using it asap.
After you’ve installed the
Raspbian for Robots image, open up a terminal and follow this commands:
sudo bash firmware_update.sh
The last lines you get should look like this:
Here’s one advice I usually give: do everything meticulously and always follow the procedure - even if it sounds redundant at times - it will save you.