mirror of https://github.com/arendst/Tasmota.git
NodeMCU Pin Labels
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@ -155,17 +155,19 @@ The ESP8266 has one SPI connection available to the user, referred to as HSPI. I
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### GPIO overview
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GPIO | Function | State | Restrictions
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---------------|-----------|------------|------------------------------------------------------------------
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0 | Boot mode select | 3.3V | No Hi-Z
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1 | TX0 | - | Not usable during Serial transmission
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2 | Boot mode select TX1 | 3.3V (boot only) | Don’t connect to ground at boot time Sends debug data at boot time
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3 | RX0 | - | Not usable during Serial transmission
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4 | SDA (I²C) | - | -
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5 | SCL (I²C) | - | -
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6 - 11 | Flash connection | x | Not usable, and not broken out
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12 | MISO (SPI) | - | -
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13 | MOSI (SPI) | - | -
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14 | SCK (SPI) | - | -
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15 | SS (SPI) | 0V | Pull-up resistor not usable
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16 | Wake up from sleep | - | No pull-up resistor, but pull-down instead Should be connected to RST to wake up
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NodeMCU Labelled Pin | GPIO | Function | State | Restrictions
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-|-|-|-|-
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D3 | 0 | Boot mode select | 3.3V | No Hi-Z
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D10 | 1 | TX0 | - | Not usable during Serial transmission
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D4 | 2 | Boot mode select TX1 | 3.3V (boot only) | Don’t connect to ground at boot time Sends debug data at boot time
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D9 | 3 | RX0 | - | Not usable during Serial transmission
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D2 | 4 | SDA (I²C) | - | -
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D14 | 5 | SCL (I²C) | - | -
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x | 6 - 8 | Flash connection | x | Not usable, and not broken out
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x | 9, 10 | Flash connection * | | * Only available on the ESP8285
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x | 11 | Flash connection | x | Not usable, and not broken out
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D6 | 12 | MISO (SPI) | - | -
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D7 | 13 | MOSI (SPI) | - | -
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D5 | 14 | SCK (SPI) | - | -
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D8 | 15 | SS (SPI) | 0V | Pull-up resistor not usable
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D0 | 16 | Wake up from sleep | - | No pull-up resistor, but pull-down instead Should be connected to RST to wake up
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