Data Sheet

12 D12 MISO
13 D13 MOSI
ADC A0 ADC
15 D15 10k pulldown
16 D16 XPD
0 D0 10k pullup Button
RST Reset
Button D0 10k pullup Button
SDA D2 SDA
SCL D14 SCL
VINVIN
3.3V3.3V
GNDGND
RXD8RX
TXD7TX
5D5LED
SparkFun Blynk Board - ESP8266 (WRL-13794)
I/O
Button: pin 0 (active low)
Blue LED: pin 5 / WS2812 LED:pin4
Si7021 Temperature and Humidity Sensor (Address: 0x40)
I2C headers (0.1 and JST)
Power
USB, Lipo battery on 2 pin JST or Vin
Vin: 3V-6V
VCC: 3.3V at 600mA
SJ2 can be cut to disable the power LED
Max 12mA per I/O pin
ADC
0-3.3V input
10-bit
WS2812
on pin 4
SJ3 can be cut to avoid
powering a WS2812 string
(on 3-pin JST connector)
Si7021 Sensor
Address: 0x40
SJ4 can be cleared to
remove pullup resistors
Jumpers
I2CPU
WS2812VCC
CHG RES/ R5
PWR LED
Charging Circuit
SJ1 can be cut and R5 populated to change charge rate
Preprogrammed charge rate: 500mA
Single Cell Lipo charging
Yellow LED when charging
3.3V
GND
PCB Antenna
GND 3.3V SDA SCL
SDA 3.3V GND SCL
Provisioning your Blynk board without a QR code
1. Create a Blynk Project
2. Select "SparkFun Blynk Board" and name project
3. Tap to copy or email authentication token
4. Create project
5a. Provisioning using a computer or phone browser
a. Connect computer or phone to Blynk Wifi network
b. Point browser to 192.168.4.1
c. Select Wifi Network and Blynk token (from step 3)
5b. Provisioning over USB
a. Open a serial terminal window (9600 baud)
b. Press 'h' for help
c. Press 's' to scan network, select number/letter for
network and enter password
d. Press 'b' to enter Blynk token (from step 3)
Connectors
2-pin JST: battery connector
3-pin JST: to attach a string of WS2812 LEDs
4-pin JST: to connect a cable to various I2C sensor boards
4-pin I2C 0.1 header: to connect various I2C sensors
MicroB USB: programming and charging
I/O pins with 2 sized holes (for soldering or alligator clips)
Blynk.cc (available for Android and iOS)
Sparkfun.com/blynk for tutorials
and getting started info
Name
Power
Ground
Control
Arduino
ADC
Serial
Pullup/down
Misc
Status LEDs
Yellow: Charging
Red: Power
Blue: D5 User LED
3.3V
GND
DOUT