i2C_simple

[last updated: 2016-11-22]
Concept/Design: sender sends char upon pushbutton press; receiver toggles onboard LED on/off
-----

• this is about as simple as you can get:
• two Arduinos communicating,
• slave devices are simple receive nodes, with no registers to read or set,
• no bidirectional communication, just master sending to slave
• and slave responding

-----

• two Uno's connected as follows:
• grounds connected together
• A4 (SDA) connected together
• A5 (SCL) connected together
• one programmed as 'master', and one as 'slave'
• one-direction communication:
• master initiates communication to slave
• slave does as programmed, but does not respond back
  (other than ack sent back to indicate message received)
• upon receiving proper code,
  slave is programmed to toggle the onboard LED on/off
• Note: Receiver node must be online in order to acknowledge the data transmission from the Sender, in order for the sender to not "hang" waiting for response

-------------------------------------------

• sketches: see: programs-all

.

.

.

eof