Espressif ESP8266 User Manual

Thingspeak API keys
The first one will allow you to write to this channel in Thingspeak, and the second one will
allow you to read from it. Treat them as secrets and with care. Others might be able to spam
your channel or to “steal” your data. We will use these keys soon enough… Also note the
channel ID on top of the screen, in my case 76642.

Espressif ESP8266 Specifications

General

Digital I/O Pins	17
Analog Input Pins	1
Wi-Fi	802.11 b/g/n
Operating Voltage	3.0V - 3.6V
Clock Speed	80 MHz / 160 MHz
Operating Temperature	-40°C to 125°C
Dimensions	24mm x 14mm
Processor	Tensilica L106 32-bit micro controller