Using a 433Mhz radio link the ESP8266 CBDB Dev Board module equipped with a DHT22 temperature/humidity sensor is uploading data directly to the Konig 433 mhz wireless station with hygro-thermometer [KN-WS400N] : And the story behind: As been working to a ESP DHT22 sensors array for a Environment data logging Read more…
Because of the very cheap ACS712 Current Sensor Board modules available all over the place, I really think that everybody heard about ACS712 sensor from Allegro MicroSystems. As I was asked if “Can be used as a current sensor module for our ESP8266 Projects without too much hustle?”, I Read more…
UPDATE !! UPDATE !! UPDATE !! UPDATE !!New fresh install instructions based on the new RASPBIAN Jessie: Raspberry PI2 + Thingspeak Server on RASPBIAN Jessie ————————————————————————————————- Original Article As you might read already in my previous ESP8266 Battery Monitor System post I was using Thingspeak.com, because of it’s flexibility, as Read more…
================== W A R N I N G ! ! ================= Li-Ion batteries are very dangerous if not handled properly. Use them only with proper protection circuits and chargers. DO NOT OVER CHARGE / BURN / OPEN Li-Ion Bats Using any of the informations available on esp8266-projects.com is on your Read more…
UPDATE!! UPDATE !! New released MPDMv4 (MAINS Power Dimmer) Driver Board ! —————————————————————————————————————————- WARNING!! You will play with LIVE MAINS!! Deadly zone!! If you don’t have any experience and are not qualified for working with MAINS power I will not ecourage you to play arround! —————————————————————————————————————————- For any new Read more…
As you remember from our previous article about DS3231 RTC Module, we have identified onboard an EEPROM chip, a 32k AT24C32 one. It is independent from the RTC circuit and conected on the I2C bus, perfect companion for a Data Logger System 🙂 AT24C32 EEPROM The AT24C32 provides 32,768 Read more…
How we will do it: Connect to Google server, fetch the page header that contain the Timestamp and do some string manipulation to obtain the Date & Time information in the format that we need to be able to update our Real Time Clock: getTime = function() conn=net.createConnection(net.TCP, 0) Read more…
What we will need: CBDB Board USB adapter (take a look on Part 1 for details how to connect them together) DS3231 Module – you can buy them at a very good price HERE, 1.62USD/pcs, a very good deal!! For programming and uploading the driver and the software we Read more…
———————————- UPDATE ————————————– For a ADC Input Frontend with Auto-range capabilities in the 0-40V Input range take a look also at the new ADC Input related article ——————————— UPADTE —————————————- After testing the ESP8266 Internal ADC I think it’s time to see also a higher resolution ADC at work. For Read more…
Today subject might look a trivial one but is not. At all. I will try to keep it as easy to understand as possible without too much “behind the scene” theory. Contact bounce is a common problem with mechanical and electromecanical switches, relays, solenoids, etc. Switch contacts are Read more…