Remotely controlled WiFi extension cord with 5 independently switchable sockets, 3.5" display for in-person setup and an NFC reader for access restriction.
Depends on ILI9488 library
Add a secrets.h file next to the sketch and define ssid and password of the wifi the socket should connect to.
| Feature | State |
|---|---|
| Remote control | ✅ |
| TFT | ✅ |
| Touch | ❌ |
| SD | ❌ |
| RFID | ❌ |
8x Relay board with ESP32-Wroom
For up to date pinout check the '''Pins.h''' header.
| Name | Number | Default/Special Function | Notes | Mapping to socket peripherals |
|---|---|---|---|---|
| G0 | 0 | GPIO, boot strapping pin | Must be LOW to enter boot mode | RFiD CS |
| G1/TXD | 1 | UART0 TX | Default serial TX | Touch CS |
| G2 | 2 | GPIO, LED_BUILTIN | Boot strapping, often onboard LED | RFiD MISO |
| G3/RXD | 3 | UART0 RX | Default serial RX | ***TFT LED PWM brighness |
| G4 | 4 | GPIO, RTC | Boot strapping pin | RFiD CLK |
| G5 | 5 | GPIO, HSPI_CS0 | Boot strapping pin | TFT D/C: data(Hi) control(Lo) |
| *CLK | 6 | SDIO clk (flash) | Reserved | Reserved |
| *SD0 | 7 | SDIO data 0 (flash) | Reserved | Reserved |
| *SD1 | 8 | SDIO data 1 (flash) | Reserved | Reserved |
| *SD2 | 9 | SDIO data 2 (flash) | Reserved | Reserved |
| *SD3 | 10 | SDIO data 3 (flash) | Reserved | Reserved |
| *CMD | 11 | SD command (SDIO flash) | Reserved | Reserved |
| **G12 | 12 | GPIO, HSPI_MISO | Boot strapping pin | Relay-3 |
| **G13 | 13 | GPIO, HSPI_MOSI | Relay-4 | |
| **G14 | 14 | GPIO, HSPI_CLK | Relay-2 | |
| G15 | 15 | GPIO, HSPI_CS, boot strap | Must be HIGH during boot | RFiD MOSI |
| G16 | 16 | UART2 RX, GPIO | TFT Reset | |
| G17 | 17 | UART2 TX, GPIO | RFid Reset | |
| G18 | 18 | VSPI_CLK (SPI Clock) | Default hardware SPI | TFT + Touch + SD CLK |
| G19 | 19 | VSPI_MISO (SPI MISO) | Default hardware SPI | TFT + Touch + SD MISO |
| G21 | 21 | I2C SDA, GPIO | TFT CS | |
| G22 | 22 | I2C SCL, GPIO | SD CS | |
| G23 | 23 | VSPI_MOSI (SPI MOSI) | Default hardware SPI | TFT + Touch + SD MOSI |
| **G25 | 25 | DAC1, GPIO | Relay-7 | |
| **G26 | 26 | DAC2, GPIO | Relay-0 | |
| **G27 | 27 | GPIO | Relay-1 | |
| **G32 | 32 | Analog, RTC, GPIO | Relay-5 | |
| **G33 | 33 | Analog, RTC, GPIO | Relay-6 | |
| G34 | 34 | Input only, Analog, RTC | Touch IRQ | |
| G35 | 35 | Input only, Analog, RTC | ||
| G36/VP | 36 | VP / Input only, Analog, RTC | AKA VP (SVP) analog and touch apps | RFiD IRQ |
| G39/VN | 39 | VN / Input only, Analog, RTC | AKA VN (SVN) analog and touch apps |
(*) SD0/SD1/SD2/SD3, CMD, and CLK (GPIO 6-11) are used for onboard flash and should not be used for external peripherals
(**) G12-14, G25-27, G32, G33 used for relays 1-8
(***) Display LED can not be directly powered using an ESP pin. Intead, power should be drawn from one of the 3.3V pins on the relay board. See LED Brightness Control section for more details.
For exact pin-relay index matching see the table above. Relays are indexed left to right from the top view.
In case TFT LED control is required, a control switch should be used to draw power from one of the relay board's 3.3V pins and regulate it using ESP32 pin with PWM. A switch consists of an NPN transistor up to two resistors. The transistor must be capble of passing through at least 200mA. A (current limiting) resistor of at least 200 Ohm (R01) should be inserted between esp pin and the gate of the transistor. The second (pull down) resistor of at least x10 times higher value than R01 could be inserted between the gate of the transistor and the ground to ensure that the LED is switched off when no signal is coming from the MCU.
