Table of Contents
WIO Control
Display
WIO Control needs a display for some of its functions:
- Status bar
- Locomotive selection
- Function selection
- Locomotive Automatic Mode (Shown in the server connection icon.)
Programming
Pinout
| LOLIN D32 |
|---|
 |
Extended Layout
The ESP32 type board selection is set by WIO Dialog.
| Preliminary |
|---|
Compared with the ESP8266, the ESP32 has a lot more I/O Pins, so an extra F0 and Shift button are added.
| GPIO Dev Module | GPIO Lolin D32 | Function | Selection mode | Shift function | Long click | Long click + shift |
|---|---|---|---|---|---|---|
| 26 | 26 | Rotary V+ | Browse loco list down / Select function right | - | - | |
| 25 | 25 | Rotary V- | Browse loco list up / Select function left | - | - | |
| 34 | 34 | Rotary direction | Take over the selected loco from the list / Flip selected function | - | - | |
| 27 | 27 | F0 | - | Alter between loco 1 and 2 | Track Power off | Track Power on |
| 32 | 32 | F1 | - | F9 | F5 | F13 |
| 33 | 33 | F2 | - | F10 | F6 | F14 |
| 0 | 0 | F3 | - | F11 | F7 | F15 |
| 14 | 14 | F4 | - | F12 | F8 | F16 |
| 12 | 12 | Shift | - | - | Function selection mode | - |
| 16 | 5 | LED | - | - | - | - |
| 35 | 35 | Battery (ADC) | - | - | - | |
| 5 | 21 | SDA (Display) | - | - | - | - |
| 4 | 22 | SCL (Display) | - | - | - | - |
Note: Do not use a hardware pull-up resistor on GPIO12 because this will block uploading firmware by USB.
ESP32 Dev Module
Voltage divider
A voltage divider is needed to measure the Lipo(battery).
GPIO35 is connected to the Lipo + with 47k resistor, and with a 100k resistor to the ground(GND).
NoGo Pins
The following pins can not be used:
- GPIO06 - GPIO11 (Are in use by the Flash interface.)
LOLIN D32
Voltage divider
The LOLIN D32 has a build in divider on GPIO35: 100k/100k.
See: https://wiki.wemos.cc/_media/products:d32:sch_d32_v1.0.0.pdf
I2C Display
The I2C SSD1306 compatible 128*64 display, must be connected to GPIO21(SDA) and GPIO22(SCL).
Short IDs
Use Transmit short IDs to load the locomotive short IDs into WIO Control.
Selecting a locomotive
- Press and release the shift button; On the bottom display line the first ID is shown.
- Turn the rotary until the wanted locomotive is selected.
- Push the rotary button to activate the selected locomotive.
Just press and release the shift again to cancel the selection procedure.
Schematic and PCB
Invert Rotary
In case the rotary is inverted the CAM Option Rotate 180° can be used to correct this.
Available as from version 724.