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Diffstat (limited to 'docs/esp8266/quickref.rst')
| -rw-r--r-- | docs/esp8266/quickref.rst | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/docs/esp8266/quickref.rst b/docs/esp8266/quickref.rst index 3cecb83998..febad37366 100644 --- a/docs/esp8266/quickref.rst +++ b/docs/esp8266/quickref.rst @@ -111,7 +111,13 @@ Use the ``machine.Pin`` class:: p4 = Pin(4, Pin.IN, Pin.PULL_UP) # enable internal pull-up resistor p5 = Pin(5, Pin.OUT, value=1) # set pin high on creation -Available pins are: 0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16. +Available pins are: 0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, which correspond +to the actual GPIO pin numbers of ESP8266 chip. Note that many end-user +boards use their own adhoc pin numbering (marked e.g. D0, D1, ...). As +MicroPython supports different boards and modules, physical pin numbering +was chosen as the lowest common denominator. For mapping between board +logical pins and physical chip pins, consult your board documentation. + Note that Pin(1) and Pin(3) are REPL UART TX and RX respectively. Also note that Pin(16) is a special pin (used for wakeup from deepsleep mode) and may be not available for use with higher-level classes like |