So with the 4-20 mA board communicating to the Particle Photon via a PSCREW built in I2C connector, would I connect an Atlas Scientific EZO pH board’s SDA and SCL lines to the screws on pins D0 and D1, daisy-chaining them as they are here at this project. I figure as long as the addresses aren’t the same, we shouldn’t have any issues.
Once the item is verified using the I2C scanner, would something like this be appropriate find that device?
#define PH_ADDRESS 99 #define ORP_ADDRESS 98
Afterwards, I would have it displayed with printf, similar to this project: