Bolt WiFi Module

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Open-Source Schematics

Bolt WiFi Module with ESP8266-12E


Bolt WiFi Module with ESP8266-12S


General Specifications

Connectivity and Processing ModuleESP8266 with custom firmware
MCU32-bit RISC CPU: Tensilica Xtensa LX106
Power5V/1A DC via Micro-USB port or 5V and GND pins
Operating Voltage3.3V
CPU Clock Frequency80 MHz
MCU Internal Memory64 KB of instruction RAM; 96KB of data RAM
MCU External Memory4 MB Flash memory [QSPI]
GPIO pins5 Digital pins [3.3V logic]
ADC1 pin 10 bit ADC [0-1V input]
PWMAll 5 Digital pins capable of PWM [Software PWM]
Dimensions35mm x 35mm
Boot TimeLess then 1 second


WiFi802.11 b/g/n
Automatic AP mode if not connected to WiFi
WEP/WPA/WPA2 authentication
Only works with 2.4 GHz WiFi
UART8-N-1 3.3V TTL UART [using TX, RX, GND pins]
[2400,4800, 9600,19200 baudrate]
CloudDefault: Bolt Cloud (
Optional: Custom cloud using Bolt APIs

LED Indicators

WiFi LED - WiFi connectivity1) Slow blinking: Trying to find and connect to WiFi network
2) Fast blinking: User has connected via Bolt IoT app for setup
3) Stable: Connected to WiFi
Cloud LED – Bolt Cloud connectivity1) Stable: Connected to Bolt Cloud
2) Off: Not connected to Bolt Cloud
3) Dim: Insufficient power/ incorrect boot