Please could someone help me explainng how to map the pins on the I2C module in the pictures, I have made many many many tries to hook it on my Arduino UNO and haven't been abel to make it work, the Led on the module goes on but the LCD just changes a little bit, it goes a little bit blue but no text on it.
Thank you very much.
I'm assuming the issue is getting it working and not how to connect it to the Arduino since
Each of the wires on the backpack are marked and will connect to the corresponding pins on the Arduino.
First thing is to determine which i2c i/o expander chip you have.
Given that it is 20 pins it probably is not the more commonly used 16 pin PCF8574 but rather the 20 pin MCP23008.
After you determine which chip you have you can then look for the appropriate library and determine how to configure it for that backpack board.
Did the vendor provide any documentation or library code?
--- bill
Judging from the 'EB' on the adapter it may very well be one of the 'Electronic Bricks'.
AliExpress is selling one here and the picture of the other side shows a web address that may help.
EDIT: I didn't find anything at the makerstudio website but when I went back to the aliexpress link and scrolled down I found some information that may be useful. It appears to be for a slightly different version of the pc board but it is worth a try.
Don
