Converting my skeeball controller from Arduino Uno to Redboard Edge. I can’t seem to identify where to connect the SCL and SDA wires from the LCD display to the Redboard Edge. The Arduino has the pins identified but the Redboard does not. Looking for an Arduino to Edge pin chart.
Thanks for your reply.
Dave
Hi Dave,
The RedBoard Edge has the I2C Bus routed to the Qwiic connector on the board. You can also use pins A4 (SDA) and A5 (SCL) if you do not want to use a Qwiic cable. There are not dedicated SDA and SCL pins like you would find on an R3 Arduino.
Mark
Thanks for the info. I checked the Edge Hookup Guide but could find the information there. How did you determine the pin location?? Do you have to configure these pins in the declaration?? The original Redboard looks like it has pins similar to the Arduino Uno. Ill read up on the Qwiic port to see if I can use that. I would rather no alter my program as it took me weeks to get it to work.
Dave
The schematic can be found at https://cdn.sparkfun.com/assets/d/6/7/6 … d_Edge.pdf The I2C port on the Arduino UNO is on A4/A5 as well.
The QWIIC connector is just a 4-pin connector that is connected to A4, A5, 3v3 and GND. Same code as for accessing I2C on an Uno.
/mike
Thanks for clarifying, Mike.
Dave, the Qwiic connector should work just fine with any 3.3V I2C device. If you have a 5V device, I would recommend using A4 and A5 instead. Also, if you are going to use the RedBoard Edge as a panel-mounted device, hard-wiring to A4 and A5 is probably the best option just in case it gets bumped and the Qwiic connector somehow gets jarred loose. The Qwiic connector does make a pretty solid connection that should not be affected by movement but it would be a pain to have to open up the panel to get to the back of the board just to plug that back in. The repetitive vibrations and movement caused by skeeballs may cause that connector to eventually fall out of place.