EZO-PRS

Notice: This page is an original repo-authored summary informed by Atlas Scientific documentation. It is not an official Atlas Scientific manual.

Purpose

This page captures the repo-relevant behavior of the EZO pressure family.

Repo Status

This family is at the METADATA tier: the driver identifies it from i and records its default address and timing. There are no typed reads or product helpers; use the raw transport APIs. The firmware lookup in src/ezo_product.h does not cover it.

Product Summary

  • default transport mode is UART
  • default I2C address is 106 (0x6A)
  • the i reply identifies it as PRS, printed with a space before the version on the I2C page
  • U selects psi, atm, bar, kPa, inches of water or cm of water, and psi is the default
  • firmware 1.03 added vacuum sensing

Measurement Model

A reading is one pressure value in the selected unit. U,1 adds a unit identifier to the output, so a parser cannot assume a bare number once that is on.

Timing Notes

The I2C pages print 900 ms for R, Cal,n and Cal,0, and 300 ms for most other commands.