This firmware has no published screen capture. Some diagnostics primarily report through USB serial. Screen appearance remains unverified here; see its app README for the intended behavior.
What to expect
Touchscreen calculator with decimal input, sign toggle, backspace, clear, and chained basic arithmetic. Use its application guide for controls, prerequisites and recorded device checks.
Capabilities used
Install and inspect
pio run -e calculator
pio device list
pio run -e calculator -t upload --upload-port <port>
pio device monitor --port <port> -b 115200Replace <port> with the discovered device. Build before upload. Read the app's partition and storage notes before switching firmware.
Evidence and controls
Read the application guide and its verification record ↗
Implementation, a passing build, observed serial operation and physical interaction are separate evidence levels. Check the guide's open device checks before relying on an unmeasured behavior.