Once you add “EEPROM.begin(size)” and mit(), it works just like EEPROM on any other Arduino board.ĥ. Turns out the EEPROM library is different and requires a few changes from “standard Arduino code.”ĮEPROM.begin(1024) // size: 4 to 4096 bytes
Esp8266 arduino install#
Just install ESP8266 support through the Arduino IDE’s board manager and most of the function in the Arduino Library work out of the box. This reason for switching might seem a little counter-intuitive: the ESP8266 works well with the Arduino IDE. In fact, I was not aware it was bit-bang until I looked a little deeper into the core. Not having dedicated I2C hardware might seem like a performance issue, but in my limited testing, I have not noticed. It is monitoring the current, to make sure I do not overload the supply. A simple call before initializing the wire library allows for I2C communication on any of the module’s pins.įor I2C testing, my test device is a high-side current sensor, part of my RGB LED strip controller. The Adafruit HUZZAH board identifies GPIO “4” and “5” as I2C for convenience. Being able to use hardware PWM on any pin makes the ESP8266 very flexible.Īlong with PWM, you can use any of the GPIO pins for I2C communication.
Esp8266 arduino software#
With clever software, you can make any pin on an Arduino do PWM using Software PWM. Lastly, any of the GPIO pins can be used for PWM. This resolution means smoother LED fading and more precise motor speed control. Changing the PWM frequency is easy.Īnother bonus is the PWM resolution. The ESP8266 core of the Arduino library, however, has a built-in PWM frequency call. Possible, but more work than I wanted to put in at the moment. One option is to change the PWM frequency, but that would mean digging in the Arduino libraries. My decoupling capacitors were singing due to piezoelectric effects. Running close to 600Hz, that is not a surprise. While building an RGB PWM controller with my Uno, I found the Uno’s PWM created a buzzing noise. That is pretty impressive battery life without doing any optimizations or sleep modes.
It would send the status of a PIR Sensor over WiFi to an MQTT broker every 2.5 seconds. When hooked up my Adafruit HUZZAH Feather to a 2500 mAh Lithium Ion battery, it ran for almost two days. WiFi causes the board to draw about 700 mA. One area I have not worked in yet is putting the boards to sleep. With built-in WiFi, these boards are ideal for Internet activities.
Esp8266 arduino how to#
That is why my last two tutorials introduced MQTT and showed how to make MQTT work with an ESP8266. My current project involves home automation and IoT stuff. ESP8266 is ideal for Internet of Things (IoT) Here are the 5 reasons the ESP8266 is my go-to Arduino board.ġ. However, when it came to day-to-day “make something quickly” type work, I relied on my Uno. Wait what? James uses something other than Arduino? Yes, I do! I have many different boards and have used most of them for one task or another. I like them so much that my Adafruit Feather HUZZAH with ESP8266 has become my go-to Arduino board.
The biggest surprise from that post is people seem to think I do not like the ESP8266! This idea is not the case the ESP8266 is awesome.
A couple of weeks ago I posted four things to know about the ESP8266 before using one.
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