Contents
ESP8266 PCB
The PCB for the (older) microcontroller ESP8266 looks like this:
Pin Layout of PCB ESP8266
The different components are connected as follows:
| Pin | Function |
|---|---|
| Pin 15 | Brew switch or optocoupler |
| Pin 14 | SSR Heating |
| Pin 2 | Temperature sensor |
| A0 | Pressure sensor |
| Pin 4 | Display SDA |
| Pin 5 | Display SCL |
| Pin 16 | E-Trigger Standby Trigger for Silvia E |
Full Expansion
For the full expansion the relays for the 3-way-valve and pump are required:
| PIN | function |
|---|---|
| PIN 12 | Relay 3-way-valve |
| PIN 13 | Relay pump |