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2016:huzzah_gpio

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2016:huzzah_gpio [2016/08/08 10:59] – 192.168.1.12016:huzzah_gpio [2016/08/08 17:29] (current) – [I2C] 192.168.1.1
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-===== Huzzah ESP8266 Breakout +===== Huzzah ESP8266 Breakout =====
- =====+
  
 This breakout has 9 GPIO: #0, #2, #4, #5, #12, #13, #14, #15, #16 all GPIO are 3.3V logic level in and out, and are not 5V compatible.  Read the full spec sheet to learn more about the GPIO pin limits, but be aware the maximum current drawn per pin is 12mA. This breakout has 9 GPIO: #0, #2, #4, #5, #12, #13, #14, #15, #16 all GPIO are 3.3V logic level in and out, and are not 5V compatible.  Read the full spec sheet to learn more about the GPIO pin limits, but be aware the maximum current drawn per pin is 12mA.
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   * *GPIO #15, is also used to detect boot-mode. It has a pulldown resistor connected to it, make sure this pin isn't pulled high on startup. You can always just use it as an output   * *GPIO #15, is also used to detect boot-mode. It has a pulldown resistor connected to it, make sure this pin isn't pulled high on startup. You can always just use it as an output
   * *GPIO #16 can be used to wake up out of deep-sleep mode, you'll need to connect it to the RESET pin   * *GPIO #16 can be used to wake up out of deep-sleep mode, you'll need to connect it to the RESET pin
 +
 +**Rev A of this board has GPIO #4 and #5 swapped (the modules changed pinouts on us) so if #4/#5 aren't working for you, try swapping! We'll fix in the next PCB run**\\
 +
 +NodeMCU has weird pin mapping.
 +Pin numbers written on the board itself do not correspond to ESP8266 GPIO pin numbers. We have constants defined to make using this board easier:\\
 +
 +  * static const uint8_t D0   = 16;
 +  * static const uint8_t D1   = 5;
 +  * static const uint8_t D2   = 4;
 +  * static const uint8_t D3   = 0;
 +  * static const uint8_t D4   = 2;
 +  * static const uint8_t D5   = 14;
 +  * static const uint8_t D6   = 12;
 +  * static const uint8_t D7   = 13;
 +  * static const uint8_t D8   = 15;
 +  * static const uint8_t D9   = 3;
 +  * static const uint8_t D10  = 1;
 +
 +
 +If you want to use NodeMCU pin 5, use D5 for pin number, and it will be translated to 'real' GPIO pin 14.\\
 +
 +===== I2C =====
 +The Huzzah does have I2C on it's interface.  Pinout is:
 +  * #4 = SDA
 +  * #5 = SCL
 +Verified to work on 8/8/2016 using DS3231 and Huzzah on proto board.\\
 +Must use the following include:\\
 +     #include <RtcDS3231.h>
 +which is in the library RTC by Makuna.\\
 +
 +SDA/SCL default to pins 4 & 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL).\\
 +
2016/huzzah_gpio.1470668350.txt.gz · Last modified: 2016/08/08 10:59 by 192.168.1.1