Pin assignments¶
Pin functions¶
Module seen from top.
| No | Name | Type | Description |
|---|---|---|---|
| P1 | VSS | Power | Ground (0V) |
| P2-P3 | N.C. | No connection | Do not connect |
| P4 | TxD | UART transmit | Reserved for future use |
| P5 | RxD | UART recieve | Reserved for future use |
| P6 | N.C. | No connection | Do not connect |
| P7 | VSS | Power | Ground (0V) |
| P8 | N.C. | No connection | Do not connect |
| P9 | VSS | Power | Ground (0V) |
| P10 | SUBNET | Digital input | High: subnet 2, Low: subnet 1. Internal Pull up |
| P11 | CTRL | Digital input | High: idle, Low: active. Internal Pull up |
| P12-P22 | N.C. | No connection | Do not connect |
| P23-P27 | VSS | Power | Ground (0V) |
| P28-P30 | N.C. | No connection | Do not connect |
| P31 | DALI RX 2 | DALI recieve pin 2 | Active high |
| P32 | DALI RX 1 | DALI recieve pin 1 | Active high |
| P33 | DALI TX 2 | DALI transmit pin 2 | Active low |
| P34 | DALI TX 1 | DALI transmit pin 1 | Active low |
| P35 | N.C. | No connection | Do not connect |
| P36 | VDD | Power | Supply (3.3V) |
| P37 | VSS | Power | Ground (0V) |
| P38-41 | N.C. | No connection | Do not connect |
The W-DALI Node module also has an RF antenna connector on the top of the module. This is reserved for future use of external antenna.
DALI TX pin description¶
Pins P33, P34 are both used for transmitting DALI serial data and may be connected to each other externally. The polarity is active low, similar to the DALI protocol polarity, and thus an external pull up is recommended to avoid undefined behaviour during power off.
An external transistor circuit is needed to sink the required DALI Bus PSU current, see the reference design section for an example.
DALI RX pin description¶
Pins P31 and P32 are both used for recieving DALI serial data and may be connected to each other externally. An external pull up is recommended. The polarity is active high, meaning that an active DALI bus (low voltage) shall correspond to high voltage on the input pins. Thus, external polarity flip and voltage shift circuitry is necessary, which can be achieved with only a few components. See the reference design section for an example.
CTRL pin description¶
The CTRL pin is used for two functions. The first being to trigger a reset to factory default upon release of the pin after being held low for >3s during operation. This will disconnect the module from any mesh network that has been set up. The second function is to put the module in bootloader mode if the pin is held low during power on. This is a reserved mode that shall be avoided but is included here for transparency.
The CTRL pin is active low and has an internal pull up.
| CTRL pin action | Effect |
|---|---|
| 0V for >3s | Factory reset of W-DALI Node module |
| 0V during power on | W-DALI Node module enters bootloader mode (reserved) |
Subnet pin description¶
The subnet pin can be used to select between subnet 1 or 2 for W-DALI network setup with a LumenRadio W-DALI RIN rail gateway without the W-DALI app.
The SUBNET pin has an internal pull up.
| SUBNET pin level | Effect |
|---|---|
| Low | Node module will join gateway set to subnet 1 |
| High or floating | Node module will join gateway set to subnet 2 |
UART pin description¶
Pins P4 and P5 expose a UART interface to the W-DALI Node module. It is reserved for future use.
RF antenna connector¶
The top of the W-DALI Node module features an RF antenna connector of u.FL type. This is reserved for future use of an external antenna option for improved range.