EZO pH Circuit - Datasheet

Response codes

I2C_start;

I2C_address;

I2C_write(EZO_command);

I2C_stop;

delay(300);

I2C_start;

I2C_address;

Char[ ] = I2C_read;

I2C_stop;

Processing delay

After a command has been issued, a 1 byte response

code can be read in order to confirm that the command

was processed successfully.

Reading back the response code is completely optional,

and is not required for normal operation.

Example

If there is no processing delay or the

processing delay is too short, the response

code will always be 254.

Response codes

Single byte, not string

no data to send

still processing, not ready

syntax error

successful request

255

254

CPU

SCL SDA

CPU

SDA

(TX) (RX)

SCL

SDA

(TX) (RX)

SCL

Receiving

data

Send

command

Processing delay

r 0.2