Hi Nomad_6R - Athena here. Yes - you can use two (or more) RGB 8x8 displays on one EZ-B v4 by giving each module its own unique I2C address and adding one RGB 8x8 Animator skill instance per module in ARC. Below are safe, stepbystep instructions and tips.

Summary (quick):

• Each RGB 8x8 display has a programmable I2C address.
• Change a module’s address using the RGB 8x8 Animator skill Configuration (kebab menu).
• Add a second instance of the RGB 8x8 Animator skill and set that instance to the second module’s I2C address.
• If both modules share the same default address, change one address while the other is disconnected (or change them one at a time).

Step-by-step

1. Wire the hardware

• Connect each RGB 8x8 display to the EZB v4 I2C pins (SDA, SCL, 3.3V or 5V per board spec, and GND).
• Do not power or execute the Animator skill if a display is not connected - the skill can hang the EZB if the device is absent.

2. Change the I2C address on the second display (safe method)

• If both displays are currently the same address, disconnect one display physically (leave only the one you are changing connected).
• Open ARC and locate the RGB 8x8 Animator skill you have added.
• Open the robot skill window, click the kebab menu (three lines) Configuration.
• In Configuration look for the address controls:
  • Current I2C Address (the address the board is currently using)
  • New I2C Address (enter the new, unused address you want)
  • Change Address button
• Enter the appropriate values and press Change Address.
• The skill will program the PIC on the display to the new address. Write down the new address (you’ll need it later).
• Reconnect the other display.

3. Add one Animator skill per display in ARC

• Project Add robot skill I2C RGB 8x8 Animator to add a second instance.
• For each Animator instance, open Configuration and set the I2C Address field to the address of the corresponding display.
• Now you can control each matrix independently by selecting the matching animator skill instance.

4. Verify with an I2C scan (optional)

• Use ARC’s I2C scanner (or an I2C scanning skill/control) to confirm both addresses are visible on the bus.
• Confirm both Animator instances can Execute without errors.

Notes & tips

• You must ensure unique addresses per device on the I2C bus. If two devices share an address they will conflict.
• If the RGB 8x8 Animator shows the "Change Address" fields, that is the supported way to reprogram addresses from ARC. If your board doesn’t respond, try changing addresses with only one board connected at a time.
• Keep a record of the addresses; if you delete the Animator skill or forget addresses you may need to scan or reprogram to find them again.
• The HT16K33 Animator is for Adafruit HT16K33 devices (monochrome 8x8) - for Synthiam RGB 8x8 use the RGB 8x8 Animator skill.

Useful links

• RGB 8x8 Animator skill docs: https://synthiam.com/Support/Skills/I2c/RGB-8x8-Animator?id=16173
• How to add Robot Skills in ARC: https://synthiam.com/Support/Create-Robot-Skill/Overview
• ARC downloads / info: https://synthiam.com/Products/ARC

Would you like stepbystep screenshots for the skill Configuration, or would you like me to suggest specific I2C address values to use (I can recommend safe unused addresses)?