I made this board for my own project: an e-ink smart frame for elderly family members that displays high-contrast reminders/photos and supports voice messages back and forth.

When ordering the PCB, I added some breakout headers and peripherals in case I wanted to add more functionality later. While working on it, I realized that I could not find many all-in-one ESP32 boards that drive large color e-paper panels directly and provide two-way audio. So before ordering the next version, I wanted to check if this board has value for the broader maker community.

Full disclosure: I'm coming at this from a product/maker angle rather than an EE background. I designed the architecture and the firmware is AI-assisted, and I worked with an experienced PCB designer for the actual board layout. I've learned a lot along the way but I'm still figuring out the finer hardware details. And that is why I'd like feedback from this community before making the next revision.

**What's on the board:**

* **MCU:** ESP32-S3-WROOM (Octal SPI PSRAM)
* **Display:** 7.3" 800×480 Spectra 6 colour e-ink, driven directly over a 50-pin FPC with full boost circuitry on-board (VGH / VGL / VPH / VPC — no external HAT needed)
* **Audio:** MAX98357A I2S amplifier + INMP441 I2S microphone (both working simultaneously)
* **Sensors:** VL53L1X Time-of-Flight presence sensor
* **Storage & Power:** MicroSD slot, USB-C (programming + power), TP4056 charging, DW01 protection, and automatic power-path switching
* **Expansion:** Breakouts for I²C, UART, spare GPIOs, HC-SR04 header, and daughterboard connectors

**Known quirks & issues on this revision:**

* **Pin sharing:** The display, speaker, and mic share GPIO 12/13/14. Handled in software, but it's a real design constraint.
* **Level translator:** There's a TXS0108 level translator between the ESP32 and panel that occasionally latched up after I2S playback. A power-cycle recovery routine fixed it, but since both sides run at 3.3V, I'm leaning toward dropping the translator entirely on Rev 2.
* **Battery ADC:** BAT\_ADC is shorted to ground on this batch (diode orientation fault), battery level sensing isn't working on these prototypes yet.
* **Connectors:** About ten expansion connectors are still untested.

I'm not selling anything or taking orders right now — just trying to find out if doing a small developer batch makes sense, and I'd rather get peer-review on the hardware design now before making another PCB.

**Questions for you:**

1. Would you be interested in building something with a board like this?
2. Schematic and pinout will be public. I'm holding Gerbers until this revision is verified — is that a dealbreaker?
3. What would you like to add (or remove) on the next revision?

Happy to post schematic snippets and answer any questions!

I made an ESP32-S3 board that drives a 7.3" Spectra 6 colour e-ink directly (on-board boost, I2S mic + speaker) — would this be useful as a dev kit?