+from microcontroller.pin import *
+# note GPIO0 and GPIO2 have built-in pull-ups on common ESP8266
+# breakout boards making them suitable for I2C SDA and SCL
+
+D0 = GPIO16
+D1 = GPIO5
+D2 = GPIO4
+D3 = GPIO0
+D4 = GPIO2
+D5 = GPIO14
+D6 = GPIO12
+D7 = GPIO13
+D8 = GPIO15
+D9 = GPIO3
+D10 = GPIO1
+
+TX1 = D4
+"""Transmit pin from second (transmit-only) UART """
+
+CLK = D5
+"""SPI clock pin"""
+MISO = D6
+"""SPI MISO (Master in, Slave out)"""
+MOSI = D7
+"""SPI MOSI (Master out, Slave in)"""
+
+RX0 = D9
+TX0 = D10