Seeed Studio Base Shield v2.1 and Arduino Uno Rev4 WiFi compatibility

Products & Technology Grove
1

I have the following set:

  1. Arduino UNO Rev4 WIFI
  2. Seeed Studio Base Sheild v2.1, voltage set to 5v
  3. Grove-LCD RGB Backlight v4.0

I use the library: Grove - LCD RGB Backlight by Seeed Studio version 1.0.2. I’m using sketch with “Skechbook_Starter_KitV2.0” from the Grove_RGB_Backlight_RGB folder but nothing works. In the top row of the display, a slight darkening appears where the characters should appear (you can see the positions of individual characters).

Is this a problem with the Uno Rev4 or some other? The base shield and Display Grove come from the unused Grove Starterkit V3, so they tend to be functional. With other components, Base Shield works.

Browsing through different versions of the rgb_lcd.h library, I noticed that depending on the version, different values of I2C addresses appear, e.g.
// Device I2C Address
#define LCD_ADDRESS (0x7c>>1)
#define RGB_ADDRESS (0xc4>>1)
Maybe that’s the problem? I don’t have another I2C device to check if the bus is working…

Can anyone help or direct something?

2

same bug for me, also with solar lipo shield and 5v selected on both

3

Thank you for your feedback. Could you please provide the SKU of the product? That way, I can better assist you.

4

To verify that your UNO R4 WiFi can see the LCD and RGB controller, run an I2C scanner sketch.

1 Like