WiFI backpack
Specs
- ESP8266 with 4MB flash memory, ceramic antenna/ipex connector, allow to share SD card SPI pins between ESP and printer SD card reader
Fom Panucatt devices
Pinout
| Pin | Function | Description |
|---|---|---|
| IO05 | CS SPI | |
| IO04 | SD Detect pin | Low = SD present |
| IO0 | Flag pin | ESP = LOW, Printer = HIGH |