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Added description for 1SPI

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Torsten Stauder 5 years ago
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      README.md

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README.md
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@ -34,7 +34,7 @@ I recommend Microsoft's [Visual Studio Code](https://code.visualstudio.com/) alo
In the upper section of main.cpp you can specify the modules that should be compiled into the code.
Please note: if MQTT is enabled it's still possible to deactivate it via webgui.
## Wiring
## Wiring (2 SPI-instances)
A lot of wiring is necessary to get ESP32-Tonuino working. After my first experients I soldered the stuff on a board in order to avoid wild-west-cabling. Especially for the interconnect between uC and uSD-card-reader make sure to use short wires (like 10cm or so)!
| ESP32 (GPIO) | Hardware | Pin | Comment |
@ -75,6 +75,42 @@ A lot of wiring is necessary to get ESP32-Tonuino working. After my first experi
Optionally, GPIO 17 can be used to drive a NPN-transistor (BC337-40) that pulls a p-channel MOSFET (IRF9520) to GND in order to switch on/off 5V-current. Transistor-circuit is described [here](https://dl6gl.de/schalten-mit-transistoren.html): Just have a look at Abb. 4. Values of the resistors I used: R1: 10k, R2: omitted(!), R4: 10k, R5: 4,7k
## Wiring (1 SPI-instance)
In this case RFID-reader + SD-reader share SPI's SCK, MISO and MOSI. But make sure to use different CS-pins.
| ESP32 (GPIO) | Hardware | Pin | Comment |
| ------------- | --------------------- | ------ | ------------------------------------------------------------ |
| 5 V | SD-reader | VCC | Connect to p-channel MOSFET for power-saving when uC is off |
| GND | SD-reader | GND | |
| 15 | SD-reader | CS | Don't share with RFID! |
| 17 | RFID-reader | 3.3V | Connect directly to GPIO 17 for power-saving when uC is off |
| GND | RFID-reader | GND | |
| 22 | RFID-reader | RST | |
| 21 | RFID-reader | CS/SDA | Don't share with SD! |
| 23 | RFID+SD-reader | MOSI | |
| 19 | RFID+SD-reader | MISO | |
| 18 | RFID+SD-reader | SCK | |
| 5 V | MAX98357 | VIN | Connect to p-channel MOSFET for power-saving when uC is off |
| GND | MAX98357 | GND | |
| 25 | MAX98357 | DIN | |
| 27 | MAX98357 | BCLK | |
| 26 | MAX98357 | LRC | |
| 34 | Rotary encoder | CLR | Invert CLR with DT if you want to change the direction of RT |
| 35 | Rotary encoder | DT | Invert CLR with DT if you want to change the direction of RT |
| 32 | Rotary encoder | BUTTON | |
| 3.3 V | Rotary encoder | + | |
| GND | Rotary encoder | GND | |
| 4 | Button (next) | | |
| GND | Button (next) | | |
| 33 | Button (previous) | | |
| GND | Button (previous) | | |
| 5 | Button (pause/play) | | |
| GND | Button (pause/play) | | |
| 5 V | Neopixel | 5 V | Connect to p-channel MOSFET for power-saving when uC is off |
| GND | Neopixel | GND | |
| 12 | Neopixel | DI | Might be necessary to use a logic-converter 3.3 => 5V |
| 17 | (e.g.) BC337 (via R5) | Base | Don't forget R5! |
## Prerequisites
* choose if optional modules (MQTT, FTP, Neopixel) should be compiled/enabled
* for debugging-purposes serialDebug can be set to ERROR, NOTICE, INFO or DEBUG.

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