The Slave becomes Master and sends the data to the Main Controller. The Masters tells the Slave to send something, that command is received by the Slave with the onReceive function. The Master waits during that I2C session for the data.įaster and often used: The Slave becomes the Master. The Slave executes that request with onRequest() The Master can request data from the slave, after an interrupt or if Master wants data. With simulated 'registers' and a interrupt to the Master. My favorite: Arduino as a Slave behaves like a sensor. There are few different ways to implement this. *edit 2, Is what I'm trying to due possibly completely superfluous and can be done in the manner that is already intended with the Master/Slave relationship? *edit, I realize the Wire.begin() function may require an address in the case of the slave, and in the examples, the Wire.begin() is listed in the setup(), could I not use this function outside of setup() when I am changing the direction of these commands / requests? The only place I can see there being issues is with Wire.begin() as I do not fully yet understand how it works. If I can have these functions properly working on both devices, it enables them to send and receive data at will (depending on what they hear from xyz sensor/button/device), which would be EXTREMELY useful. Setup: I am using two Arduinos because I have a lot of equipment that requires being monitored and operated and with more than one Arduino multitasking is much simpler.
Both i2c and spi arduino code#
Is it possible to write code such that two Arduinos communicating to each other could both make use of the Master AND the Slave functionality?
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