12c Adres How Do I Know?

Question

i know i asked this before.but i cant find the topic. my question is ,if i change a 12c port as in pic below. how do i now withs port i changed on ezbv ?sinds there are 3 ports.

Athena · Accepted Answer

Yes - for the RGB 8x8 Display, you normally only need: 1. The RGB 8x8 Animator skill in ARC 2. A valid I2C connection on the EZ-B v4 3. Correct power and wiring A few important clarifications: ## 1) The 3 I2C connectors on the EZ-B v4 are the same The three I2C ports on the EZ-B v4 are not separate buses. They are duplicates of the same I2C lines. So it does not matter which of the 3 ports you plug the 8x8 into. ## 2) The 8x8 uses an I2C address, not a port name The display has an I2C address like 0xA0, 0xA2, etc. - The address is changed on the RGB 8x8 Animator skill - Not on the EZ-B v4 itself - ARC will talk to the display by address - The physical I2C connector used on the EZ-B does not matter If you have more than one 8x8 display, each one must have a different I2C address. ## 3) If ARC sees the 3 letters flashing but nothing works That usually means one of these: - The display is getting power, but not communicating over I2C - The I2C address in ARC does not match the display - The display is not actually on the I2C bus correctly - The connection to the EZ-B v4 is not established ## 4) What to check Please verify: - EZ-B v4 is connected in ARC - The RGB 8x8 Animator skill is added to the project - The skill’s I2C address matches the display - The display is plugged into any of the 3 I2C connectors - The display has the correct 5V/GND power ## 5) If you have only one RGB 8x8 Use the default address first and don’t change it until needed. ## 6) If you are unsure of the address Open the RGB 8x8 Animator skill and check its Settings from the kebab menu. There you can view or change the I2C address. You can read more here: - RGB 8x8 Animator skill: https://synthiam.com/Support/Skills/I2c/RGB-8x8-Animator?id=16173 - I/O port types: https://synthiam.com/Support/Advanced-Fundamentals/io-port-types ## 7) About renaming the skill window You mentioned it would be nice to rename it to something like RGB1 or RGB Left - that’s a good idea for organizing multiple displays. ARC doesn’t rename the built-in skill window title like that directly, but you can make the project easier to understand by: - Naming the skill clearly when you add it - Using project notes or comments - Creating separate logic/scripts for each display if needed If you want, I can show you a clean way to run two RGB 8x8 displays in ARC with different addresses and keep them organized. Can you tell me: - What exact I2C address is shown in the RGB 8x8 Animator skill? - Is this display the only I2C device on your EZ-B v4? - Are you using one 8x8 or more than one?

DJ Sures · Answer

Here’s your previous posts and questions: https://synthiam.com/User/nomad-6r/ForumPosts

Nomad 6R · Answer

thanks dj

DJ Sures · Answer

You bet. Hope you find your original question However, remember that all ezb i2c ports are the same. They are duplicate of each other. Each port is not separately addressable.

Nomad 6R · Answer

i dont see it.also would be good to have the possebility to change the name , of the window rgb.excample rgb1 or rgb left

DJ Sures · Answer

There is no need to change the name of the three ezb i2c ports. All three i2c are the same ports. It doesn’t matter what i2c port your device is connected to. They are all the same port. Just like a power bar for your home electricity, all plugs are the same. The i2c is the same for all plugs.

The i2c connectors on the ezb are the same. They are not different. They have the same signal and same wires and same power. The i2c connectors on the ezb are the same. They do not have different signals. They do not have different addresses or different power. It’s all the same.

Find out more in the ezb datasheet here: https://synthiam.com/Tutorials/Lesson/18

Hope that helps!

Nomad 6R · Answer

now am lost it. i thougt you could change it 0xA0 OR 0XA2

DJ Sures · Answer

You can change the address if i2c devices that support that feature. The RGB Animator does Support that feature. The port that the RGB Animator is connected to is irrelevant.

All i2c ports on the ezb are the same. They share the same connection and signal and power.

Nomad 6R · Answer

ah there's is no way of telling withs is withs rgb in ARC if you use more , then one. the adres is only changeble in the rgb not in the ezbv4.

Nomad 6R · Answer

@athena i received today my 8x8 . do i need anything else than the 8x8 skill ? when i connect to ezbv4 i see 3 letters flashing but none works .

Nomad 6R · Answer

@athena i have only one connected but tested bolt . the address is 0xa2 i use empty ARC and one 8x8 skill .

Nomad 6R · Answer

@athena problem solved . i turned the cable 180 and there it was . thank you

Nomad 6R

12C Adres How Do I Know?

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