Do you have ghosting (ghost images of previous screen) on your TRMNL X?
See below.
The no flicker + grayscale feature release exposed underlying issues with some customer displays.
This was resolved by our factory for upcoming components, but previously affected customers may experience occasional washed out images:
Tuning TRMNL OG
This guide provides a quick method to adjust your display's tuning and resolve the washed out effect without new hardware. An alternative to this guide is enabling Maximize Compatibility.
Step 1 - Flash the newest firmware release
Visit trmnl.com/flash and select your device, then the latest firmware (1.7.x or higher), following instructions to add this build to your device.
Note: the "temp profile" feature is currently only available for TRMNL OG devices.
Step 2 - Find profiles in your device settings
Go to your Device settings, click "Firmware" and toggle between multiple profiles.
Step 3 - Test each profile
We suggest first trying Profile A, then B, and so on. You may want to take a photo of each result under good lighting conditions, preferably with your exposure settings locked.
To test a profile:
Select and save the profile from your Device settings
Install our Temperature Profile Test Image plugin and add it to your playlist multiple times. Drag and drop them in your Playlist to be the "next" items. Do this by ordering it after the row with a green "Displayed now" badge (example below)
Click the button on the back of your device to force-skip to the next screen
Observe results
Repeat Steps 1-4 for each profile until you find one that looks best on your device. Send us a live chat to share before/after photos, which we'll use to generate additional profiles.
TRMNL X: Decreasing Previous Image Visibility on Current Image (Ghosting)
As of firmware v1.8.4, TRMNL X can now use the Temperature Profile feature to increase the screen flashing to ensure the e-ink gets pushed properly and there is no "ghost" image of the previous screen.
Device Settings > Firmware, select either Temperature Profile A or B (they both do the same thing), instead of Default to increase the screen "wipes" and click Save.