2.9 inch E-paper Display Arduino 122*250 Tri-Color Black/White/Red

Use the 2.9-inch diagonal to shortlist e-paper panels, then check the exact drawing for fit. Compare the visible area and bezel against your enclosure. Get the native pixel layout first, then try your smallest text, icons and any barcodes at that layout before committing to the enclosure. Test the result under the lowest available ambient light.

For the listed SPI interface, check the exact controller, SPI mode, logic levels and update time with a representative screen. Ask for the waveform and initialization for the exact panel revision. Confirm its supported update modes before deciding whether to use partial refresh.

For the listed e-paper, compare readability in available light and how long the actual content takes to refresh. Measure the change-to-visible time and check for ghosting with the actual sequence of graphics. If updates must be frequent or animation is essential, compare the result with a continuously refreshed display under your power and lighting constraints.

Use the listed 0 °C to +40 °C operating range to plan cold starts and hot running tests, with temperature measured at the panel. Time a full refresh and any documented partial refresh, then measure power over a representative update and idle cycle. Check barcode readability on the installed sample if it will display codes.

Record the approved panel and controller revisions, waveform version, power profile and accepted image behavior. Give us those references and ask us to confirm them against the sample and production quantities in your quote.