OLED screen connection via RJ45

Using an OLED screen is not mandatory: the device can work through Link and the portal. After the first firmware flash, the usual scenario is Link on PORT 2: Link setup, Wi-Fi connection, and the device appears in the portal.

At the same time, in some scenarios a local screen is more convenient or required:

• no Wi-Fi at the installation site;
• autonomous operation without the portal is required;
• production/service stands where a local interface is important.

Screen

Model selection

When choosing a screen, be sure to check the power specification in the model description. It must support 3.3-5V. A screen designed only for 5V will damage the microcontroller.

BUY OLED 1.3

RJ45 pinout

• 1 (WO) -> SDA
• 2 (O) -> VCC
• 3 (WG) -> PSH
• 4 (B) -> BAK/CON
• 5 (WB) -> TRA
• 6 (G) -> TRB
• 7 (WBr) -> SCL
• 8 (Br) -> GND

Wiring diagram

Connect CON-BAK by installing a through-hole resistor 10 kOhm, 0.25W. This allows correct use of both button functions.

Important:

• avoid short circuits of conductive parts;
• use heat-shrink tubing or electrical tape for insulation.

 _______________(R10kΩ)________________
 |                                    |
CON | SDA | SCL | PSH | TRA | TRB | BAK | GND | VCC
 |     |     |     |     |     |     |     |     |
     1(WO) 7(WBr)3(WG) 5(WB) 6(G)  4(B)  8(Br) 2(O)

Wiring photos