#Esp8266 spi arduino install
#Esp8266 spi arduino serial
#Esp8266 spi arduino full

These pins are made available just in case they become necessary to your project. Also, most 3.3V FTDI boards don't have a lot of juice to supply on the 3.3V bus (they often supply about 50mA max). The FTDI_VCC jumper defaults to open to ensure that, if a 3.3V Logic (5V power) FTDI Cable is used to program the Thing, 5V isn't accidentally delivered to the IC. Using and modifying this jumper is discussed later in this tutorial.

#Esp8266 spi arduino serial

Keeping this jumper closed enables programming, but makes debugging via the Serial Monitor difficult, as the board will reset into bootloader mode whenever the terminal opens. The DTR output of the FTDI Basic is used for two purposes: to reset the ESP8266 and pull GPIO0 low (putting the chip in bootloader mode).

Of these jumpers, the DTR one is the most commonly modified. Back of the Thingįlipping the Thing over revels a few trace jumpers and test points, which you may find handy for your application.Īllows for auto-reset while programming the ESP8266, but makes serial debugging difficult.Ĭonnects 10kΩ pull-up resistors to the SDA and SCL pins.Ĭonnects the 3V3 pin on the serial header directly to the ESP8266's 3.3V supply. Unfortunately, most of the remaining GPIO are connected to the on-board SPI flash memory IC, which stores the ESP8266's program memory and potentially other data. What happened to the rest of the GPIO pins? Why the eclectic pin-numbering scheme? We're taking what the ESP8266 gives us. This pin is also tied to the on-board LED.Ĭan be connected to reset to set the ESP8266 into deep sleep mode.Ī 10-bit ADC with a maximum voltage of 1V.ĮSP8266 enable pin. No supply: Can be used as a voltage supply input to the 3.3V regulator. The rest of the power, control, and I/O pins are broken out on the other side of the board. The SCL pin also serves as the clock (SCLK) for the ESP8266's SPI interface. If you need the extra I/O, instead of I 2C, the SDA and SCL pins can be used as GPIO 2 and 14 respectively. This pinout matches that of most of our I 2C-based breakout boards, so you can piggyback them right on top of the Thing. Pin LabelĬan either be used as ESP8266 GPIO2 or I 2C serial data (SDA).Ĭan either be used as ESP8266 GPIO14 or I 2C serial clock (SCL).

This header includes four pins - all that should be required to connect an I 2C device up to the Thing. Whether you want to hook the Thing up to a motion sensor, light sensor, digital-to-analog converter, or OLED display, I 2C is often the protocol of choice. I 2C is a very popular communication protocol in the embedded world. Connects through a capacitor to RESET, and a buffer to the ESP8266's GPIO0.īy default, this pin does not supply the ESP8266 directly (a jumper on the back can change that). Performs auto-reset, and puts the ESP8266 into bootloader mode. If a pin is directly tied to an ESP8266 I/O, it'll be noted: Pin Label

The pinout of this header matches the extremely common 'FTDI header.' That means you can interface it with either a 3.3V FTDI Basic or a 3.3V I/O FTDI Cable to program and debug the Thing.įor a quick breakdown of the pins on this header, consult the table below. This six-pin header will be the main point of contact between the Thing and your development computer. The Thing's I/O headers can be broken down into three sections: Serial Programming Header This wishlist includes everything we use in this tutorial to program and use the Thing if you are ordering the board individually: Suggested Readingīefore continuing on with this tutorial, you may want to familiarize yourself with some of these topics if they're unfamiliar to you: To follow along with this tutorial, and get up-and-running with the Thing, you may need a few extra tools and materials. Using the Arduino Addon - There are a few key differences between programming the Thing and any other Arduino board.Example Sketch: AP Web Server - Set the Thing up as an access point and use it to serve web pages.

#Esp8266 spi arduino install

Installing the ESP8266 Arduino Addon - The Thing can be programmed using Arduino! Just follow the instructions here to install the board definitions.

Hardware Assembly - Tips and recommendations on what to solder to the Thing's I/O pins.

Programming the Thing - Interface a 3.3V FTDI Basic with the Thing to program it.

Powering the Thing - The Thing can be powered through either USB or a LiPo battery.

Hardware Overview - A quick rundown of the Thing's components and pinout.

This tutorial will familiarize you with all things SparkFun Thing.

#Esp8266 spi arduino full

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