* If no [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is connected, make sure `HEADPHONE_ADJUST_ENABLE` is not active.
* If no [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is connected, make sure `HEADPHONE_ADJUST_ENABLE` is disabled.
* Make sure to edit `settings.h` (HAL=3) and `settings-lolin_d32.h` according your needs.
* Disable `SD_MMC_1BIT_MODE` and `SINGLE_SPI_ENABLE` as these are not supported by this PCB.
* Enable `RFID_READER_TYPE_MFRC522_SPI` as other RFID-reader-types are not supported by this PCB.
## PCB-Wiring (2 SPI-instances: RC522 + SD)
Uses two SPI-instances. The first one for the RFID-reader and the second for SD-card-reader. Please refer [Schematics](Pictures/Schematics.pdf) for reference.<br/>
@ -15,16 +15,59 @@ After I've been asked many times to provide a PCB, I finally did so :-) It makes
* rev2: Reset-pinheader added. Can be used to connect e.g. a [micro switch](https://www.ebay.de/itm/10x-Mini-Taster-Drucktaster-klein-Mikroschalter-6x6x5mm-Arduino-Raspberry-Pi/333273061003) to it, so you can reset Tonuino even in battery-mode from the outside of the enclosure. Micro switch can be placed somewhat hidden at the enclosure.
## Prerequisites
* If no [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is connected, make sure `HEADPHONE_ADJUST_ENABLE` is not active.
* If no [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is connected, make sure `HEADPHONE_ADJUST_ENABLE` is disabled.
* I used 390/130 kOhms-resistors as voltage-divider. However, make sure to use a multimeter to determine their exact values in order to achieve a better battery-measurement. They can be configured in `settings-lolin32.h` as `rdiv1` and `rdiv2`. Hint: for Lolin D32's battery-measurement 100k+100k were used. However, I decided to change the ratio from 50/50% to 25/75% to have a "better" signal. 100/100 might be work as well; didn't test it.
* Make sure to edit `settings.h` (HAL=1) and `settings-lolin32.h` according your needs.
* Make sure to edit `settings.h` (HAL=1) and `settings-lolin32.h` according your needs (see table below).
* Disable `SD_MMC_1BIT_MODE` and `SINGLE_SPI_ENABLE` as these are not supported by this PCB.
* Enable `RFID_READER_TYPE_MFRC522_SPI` as other RFID-reader-types are not supported by this PCB.
## PCB-Wiring (2 SPI-instances: RC522 + SD)
Uses two SPI-instances. The first one for the RFID-reader and the second for SD-card-reader. Please refer [Schematics](Pictures/Schematics.pdf) for reference.<br/>
| --- | MAX98357 | SD | Info: if pulled down to GND amp will turn off |
| --- | MAX98357 | GAIN | Pullup with 100k to 3.3V to reduce gain |
| 34 | Rotary encoder | CLK | Change CLK with DT if you want to change the direction of RE |
| 35 | Rotary encoder | DT | Change CLK with DT if you want to change the direction of RE |
| 32 | Rotary encoder | BUTTON | |
| 3.3 V | Rotary encoder | + | |
| GND | Rotary encoder | GND | |
| 4 | Button (next) | | |
| GND | Button (next) | | |
| 2 | Button (previous) | | |
| GND | Button (previous) | | |
| 5 | Button (pause/play) | | |
| GND | Button (pause/play) | | |
| MFET 3.3V | Neopixel | V | |
| GND | Neopixel | G | |
| 12 | Neopixel | DI | |
| 17 | N-channel Mosfet | Gate | |
| 33 | Voltage-divider / BAT | | Optional: voltage-divider to monitor battery-voltage |
| 22 | Headphone jack | | Optional: if pulled to ground, headphone-volume is set |
## Things to mention
* RFID: In order to avoid buying a 6pin-JST-PH-connector I used 2x3pin instead. This is because I already had ten of them (see link below).
* In contrast to Lolin D32, Lolin32 doesn't feature an integrated voltage-divider. That's why on the lower left there's a JST-PH2.0-connector to connect the LiPo-battery. Make sure to connect (+) to the left und GND to the right. From there you need to solder two short wires (5cm or so) onto the pcb with a JST-PH2.0-connector attached on the other side. This one needs to be plugged into Lolin32 (see pictures-folder). Please note: Lolin's JST-PH2.0-connector needs (+) left side and GND right side. Don't be confused if black/red-colouring of the JST-wires used seems "weird" because is reversed (black => (+); red => GND).
* Better don't solder Lolin32 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](https://www.eremit.de/p/eremit-3-7v-2500mah-lipo-104050-jst-ph-2-0mm) with deep discharge protection! This is really really really important!!!
* Doesn't (currently) support SD-MMC and RFID-reader PN5180
* Doesn't (currently) support SD-MMC and RFID-reader PN5180. Another OCB will be released that provides these features. Stay tuned!
## Hardware-setup
The heart of my project is an ESP32 on a [Wemos Lolin32 development-board](https://www.ebay.de/itm/4MB-Flash-WEMOS-Lolin32-V1-0-0-WIFI-Bluetooth-Card-Based-ESP-32-ESP-WROOM-32/162716855489). Make sure to install the drivers for the USB/Serial-chip (CP2102 e.g.).
Torsten Stauder
5 years ago