Idea for a new version of a v7 raw board targeting low deepsleep consumption

[martinberlin]

This is just the start of the idea: https://github.com/martinberlin/epdiy-hardware-versions/blob/main/epdiy-v7-raw/v7_raw_schematic_1.0.pdf
Targeting only 8 bit panels 33 (9.7 inch), 34 (6 inch) and maybe ED052TC4 connectors only. Same MCU so speed and timings do not change, different board setup, since this will not have IO expander.

Removed

• PCA9535 IO expander, this will be only GPIO driven
• UART IC and all related circuit like it's own LDO

Updated

• RTC for RV2032 (removing old Crystal, capacitors, etc)
• UART for built in USB only
• Release 1.0 make it as raw barebone as possible (No RTC, No QWIIC, just get the display working)

Coming in additionally

• 2 new buttons: RESET + BOOT in case is in deepsleep and does not let flashing to force MCU enter in download mode
• QWIIC connector so it’s easier to connect new sensors (In Rel 1.1)
• ED052TC4 connector a bit bigger size than Lilygo with higher resolution
• All connectors in a human friendly position to make a case
• Solar harvest circuit (idea) so we can support auto charging (In Rel 1.0)

Just the beginning, any feedback dear team?
@mickeprag @vroland @mcer12

[martinberlin]

Preview: https://x.com/martinfasani/status/1866418191729144247