Here is a short tutorial on how to control an 8 channel relay module via MQTT. Below you will find both the WeMos and Android source codes needed to get started. The relay module is connected to a...
Sub Process_Globals
Public Serial1 As Serial
Private wifi As ESP8266WiFi
Public mylcd As LiquidCrystal
End Sub
Private Sub AppStart
Serial1.Initialize(115200)...
- AES256 encrypt a message with IV and Salt
- Base64 encode it
- send a http post request to a php script
- decrypt in php
- send back a AES256 encrypted and Base64 encoded message to...
This example replaces my previous examples with cleaner inline C coding (I'm getting better )using almost all variables from Globals. You can define the keysizes (eg. 2048 or 4096). It's fully...
Having had my work flow cut down in the middle by vicious "circumstances" I decided to let it all go and "go fishing" as mr. Miyaghi (Karate kid) would say. So I did some things I couldn't do...
At Arduino we like to experiment with new technologies to figure out if we can use them to improve the tools we make for our users. We’ve recently been experimenting with the Python language as a possible extension for our programming platforms, considering how it has become the number one...
Hi
Here a sample program to control/monitor 8+8 digital Out-Inp, plus an I2C ADC.
The program use the MQTT protocol.
This program is an evolution of the previous one I posted.
Hi
Here a sample program to control 8 outputs on arduino ESP32. The program use the MQTT protocol to exchange the data (really a single byte). By Node-red web interface the user set or reset the...
This is not a tutorial for B4R. I think a glossary of terms might be useful for beginners to electronics and B4R. So I created my own list in GitHub to record the terms that I find need...
B4R v1.20 added support for ESP8266 modules. ESP8266 is a great module for IoT solutions. For a few dollars you get a powerful microcontroller with built-in support for wifi.
This example generates a OTP/2FA ("One Time Password") as you know it when you login to a website and you get a 6 digit code via sms. It changes every 30 seconds.
Here is a nice tutorial by the guy in DronebotWorkshop. What surprised me (and I did not know that) is that with e-paper you only have power consumption while writing to it and no more. Even if...