Table of Contents
WIO-03 Extended Wemos mini32 D1 based Wireless Multi I/O unit
| Copyright Rob Versluis and Peter Giling |
|---|
Description
The Wemos mini32 D1 board offers many I/O pins, so it was a challenge to see
this unit used in the in popularity growing WIO concept.
features
- 16 I/O ports useable for almost the whole range of GCA extension units
- control of 4 servo motors
- Neopixel control
- serial port
- I2C
- small outline : 44 x 66 mm.
- Switching power module 1 Amp, so supply can be anything between 9 and 28 Vdc 5VA, without any need for cooling.
- The mentioned power supply makes current consumption very low.
Connector info
Due to a fault in the original datasheet, the TX and RX connections of UART1 connectore are swapped.
This is mainly no problem, but it differs from serial connectors on other WIOxx boards.
UART1
| UART1 | |
|---|---|
| pin# | function |
| 1 | +5V |
| 2 | GND |
| 3 | RXD |
| 4 | TXD |
I2C1
| I2C1 | |
|---|---|
| pin# | function |
| 1 | SDA |
| 2 | SCL |
| 3 | GND |
| 4 | +5V |
NP1
The Neopixel connector is not pin compatible with the WIO-01 and WIO-02.
| NP1 | |
|---|---|
| pin# | function |
| 1 | +5V |
| 2 | GND |
| 3 | Data |
I/O ports
| IO1 ports 1 to 8 | |
|---|---|
| pin# | function |
| 1 | +5V |
| 2 | GND |
| 3 | port 1 |
| 4 | port 2 |
| 5 | port 3 |
| 6 | port 4 |
| 7 | port 5 |
| 8 | port 6 |
| 9 | port 7 |
| 10 | port 8 |
| IO2 ports 9 to 16 | |
|---|---|
| pin# | function |
| 1 | +5V |
| 2 | GND |
| 3 | port 9 |
| 4 | port 10 |
| 5 | port 11 |
| 6 | port 12 |
| 7 | port 13 |
| 8 | port 14 |
| 9 | port 15 |
| 10 | port 16 |
Hardware
Corrections
| R5 | 150kOhm |
| R6 | 47kOhm |