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MIKROE pH Click

pH Click is a compact add-on board that provides an opportunity for the user to read pH with the same accuracy and capabilities as with some other expensive solutions. This board features the pH EZO™, a 6th generation embedded pH circuit that offers the highest level of stability and accuracy from AtlasScientific. With an easy to use data protocol, simple command structure, and flexible calibration protocol this Click board™ works with any off-the-shelf pH probe. It has temperature-dependent or independent readings with a full range of pH readings from 0.001 to 14.000. This Click board™ makes an excellent choice for applications where users want to add high accuracy pH readings to their future projects.

pH Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

NOTE: A pH Probe does not come with this Click board™.

pH Click is based on the pH EZO™, a 6th generation embedded pH circuit that offers the highest level of stability and accuracy from AtlasScientific. With an easy to use UART data protocol (with additional I2C serial interface), simple command structure and flexible calibration protocol that supports single-point, two-point, or three-point calibration, this Click board™ works well with any off-the-shelf pH probe. It has temperature-dependent or independent readings with a full range of pH readings from 0.001 to 14.000. Additional thorough and pictorial explanations of any of the calibration methods can be found in the attached datasheet.

The pH EZO™ circuit is characterized by great sensitivity that gives its accuracy. When electrical noise is interfering with the pH readings, it is common to see rapidly fluctuating readings or readings that are consistently off. To verify that electrical noise is causing inaccurate readings, place the pH probe in a cup of water by itself. The pH readings should stabilize quickly, confirming that electrical noise was the issue.

This Click board™ uses the UART communication interface as its default communication protocol that supports all standard baud rates up to 115.200 but also provides the possibility of using the I2C serial interface. The selection can be performed by positioning SMD jumpers labeled as COMM SEL to an appropriate position. Note that all jumpers must be placed to the same side, or else the Click board™ may become unresponsive.

This Click board™ uses the UART communication interface as its default communication protocol that supports all standard baud rates up to 115.200 but also provides the possibility of using the I2C serial interface. The selection can be performed by positioning SMD jumpers labeled as COMM SEL to an appropriate position. Note that all jumpers must be placed to the same side, or else the Click board™ may become unresponsive.

Also, the pH EZO™ circuit contains an LED indicator that informs the user about the current state of the pH circuit at any time with a specified color. The green color indicates Standby Mode, the yellow color indicates sent pH data, while the blue color indicates pH data being read. Besides, there is a purple color that signals a change in the Baud rate, a red color that represents an invalid command given by the user, and a white color that the LED flashes when a device is connected to the circuit.

This Click board™ is designed to operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the UART communication lines properly. However, the Click board™ comes equipped with a library that contains easy to use functions and an example code which can be used, as a reference, for further development.

  • Interface: I2C, UART
  • Compatibility: mikroBUS™
  • Dimensions: 57.15 x 25.4mm
  • Input Voltage: 3.3V or 5V
  • pH Measuring Range: Min. 0.001 NU, Max. 14.000 NU
  • pH Resolution: 0.001 NU
  • pH Accuracy: ±0.002 NU
  • Operating Temperature Range: Min. -40°C, Typ. +25°C, Max. +85°C
  • NU = No Unit

MIKROE pH Click Product Help and Resources

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