Torsten Stauder 46545bfb5d Shortened MQTT-conn-timeout + added PSRAM-flag to A1S		5 years ago
..
Gerber	D32-PCB: next try	5 years ago
Infos	Added PSRAM-flag to Lolin D32 pro	5 years ago
KiCad	D32-PCB: next try	5 years ago
Pictures	Removed short-circuit in D32-PCB. Sorry!	5 years ago
README.md	Shortened MQTT-conn-timeout + added PSRAM-flag to A1S	5 years ago

README.md

Tonuino-PCB based on Wemos' Lolin D32

Attention

In rev1 I made a mistake that leads to a short circuit. Hopefully nobody ordered it :-( Current revision is 1.1
This PCB is not yet tested! Please tell me when you've been testing it successfully.

Features

Fits Wemos Lolin D32 (not Lolin32, Lolin D32 pro or Lolin 32 lite!)
Outer diameter: 53 x 81mm
JST-PH 2.0-connectors for buttons, rotary encoder, Neopixel, RFID and reset (not 2.54mm pitch!)
2.54mm-connectors for MAX98357a and uSD-card-reader. In contrast to my pictures: better solder them directly onto the PCB without having a female-connector (as socket) in between. In turned out that especially plugging MAX98357a into a female connector can lead to connectivity-issues!
Mosfet-circuit that switches off MAX98357a, Neopixel, headphone-pcb and uSD-card-reader automatically when deepsleep is active
All peripherals are solely driven at 3.3V! Keep this especially in mind when choosing uSD-reader. If in doubts use one without voltage-regulator (link below).
If headphone-pcb is used, MAX98357a is automatically muted when there's a headphone plugged in and vice versa.
If HEADPHONE_ADJUST_ENABLE is set and a headphone is plugged in, an alternative maximum volume is activated. I added this feature because headphone-pcb makes use of an amp that (probably) "allows" children to damage ears. This maximum volume can be set and re-adjusted via webgui.
Reset-button

Prerequisites

If no headphone-pcb is connected, make sure HEADPHONE_ADJUST_ENABLE is not active.
Make sure to edit settings.h (HAL=3) and settings-lolin_d32.h according your needs.

Things to mention

Better don't solder Lolin D32 directly to the PCB. I recommend to make use of female connectors (as socket) instead (link below).
When ordering a LiPo-battery, make sure to use one with deep discharge protection! This is really really really important!!!
Doesn't (currently) support SD-MMC and RFID-reader PN5180

Hardware-setup

The heart of my project is an ESP32 on a Wemos Lolin D32 development-board. Make sure to install the drivers for the USB/Serial-chip (CP2102 e.g.).

MAX98357A (like Adafruit's)
uSD-card-reader 3.3V only
RFID-reader
RFID-tags
Neopixel-ring
Rotary Encoder
Buttons
Speaker
uSD-card: doesn't have to be a super-fast one; uC is limiting the throughput. Tested 32GB without any problems.
JSP PH-2.0-connectors
Female connector
(optional) IDC-connector female 6pin for headphone-pcb
(optional) IDC-connector male 6pin for headphone-pcb
LiPo-battery (2500 mAh) with connector JST PH 2.0mm

Parts

1x IRF530NPbF (N-channel MOSFET)
1x NDP6020P (P-channel MOSFET)
1x 1k resistor
1x 10k resistor
2x 100k resistor
4x JST-PH2.0-connector (2 Pins)
3x JST-PH2.0-connector (3 Pins)
1x JST-PH2.0-connector (5 Pins)
Female connector as socket for Lolin32
(optional for headphone-PCB) 1x IDC-connecor female (6pin)
(optional for headphone-PCB) 1x IDC-connecor male (6pin)

Where to order?

I ordered my PCBs at jlcpcb. You have to order at least 5 pcs, which is only at 2$ + shipping. It took two weeks to arrive. If you want to have a look at the PCBs first (without having KiCad installed), visit Gerberlook and upload gerber.zip from the Gerberfiles-folder.
Enter 31 x 31mm as dimensions in JLCPCB's order-form.

Do I need to install KiCad?

Unless you don't want to change anything: no! All you need to provide are the gerberfiles (gerber.zip) to your manufactur (e.g. jlcpcb). However, all Kicad-files used are provided as well.