Posts From The Art of Technology
Localized IOT – Based on the ESP8266, JSON, and MQTT
My automation project keeps evolving. Here is an image of what one of the sensor/display nodes looks like now. The image is of the IOT Node Base. Contains power regulator. ESP8266 based on the Wemos D1 Mini. A basic sensor node consists of the board above and sensor. An advanced node would consists of the base node...
Replace your Raspberry PI with a Dell Wyse 3040 Thin Client
I had a project come up where I was looking for a Raspberry Pi to host it. However, I don't know if you have checked Raspberry Pi pricing or not lately, it seems the "shortages" are effecting them as well. Thus causing the prices to increase for those who have them. For example, a Raspberry Pi 4 Model B with 2GB ram...
Python Automation – Code Snippet – Return Text File Contents
This Python function will read and text file and return the contents. #usage yourContentHolder = return_text_file_content(path to text file) def return_text_file_content(file): encoding_format = "utf-8" textDataFile = open(file, mode="r",encoding= encoding_format) textContent = textDataFile.read()...
Hydroponics Automation Overview
I have been using hydroponics to grow various herbs, lettuces, and other food plants for some time now. It is a great way to grow fresh veggies. Recently I ventured into designing my own hydroponic systems - as you can see below - this is the test bed I have been using. I also have been working on a few iterations on...
Python Automation – Code Snippet – Return List of Files in Directory by Extension
This is a Python Code Snippet that will return a list of files based on extension from a directory including full path. #Usage yourlist = return_file_list_by_ext("directory",".ext") def return_file_list_by_ext(directory,ext): import os file_list = [] for file in os.listdir(directory): if file.endswith(ext): # Store...
Automation With Powershell and Python – Step 1 Have a Plan
I have been working with computers and other technologies going on 35 years now… I get a kick out of automating stuff. If you want to do more with less - or not have to worry about the boring stuff. Or even if you are not doing the time sucking task - but you want to make sure it is done right, each and every time....
PIC10F322 and XC8 Code – Light Activated Switch
Using the ADC module in the PIC10F322 – we are going to use a photoresistor (see previous post on Using A Photoresistor) and a Potentiometer (another post here about it) – that will turn on and off a LED based on the amount of light. The trigger point is adjustable using the Potentiometer. Of course you could instead...
PIC10F322 and XC8 Code – Adjustable Push Button Timer
We are going to take what we have done with the ADC and expand it some more and add in a button and the interrupt base timer code from a previous post. The setup… RA0 – LEDRA1 – PotentiometerRA2 – Push Button (tied to ground) (weakpull-up is enabled) High level… Press the buttonLED will lightThe time the LED is on –...
PIC10F322 and XC8 Code – Using ADC and PWM To Control LED Brightness
In my other post – PIC10F322 XC8 Analog-to-Digital Converter (ADC) Getting Started. I went over the basics of getting up and going with the ADC on the PIC10F322. The code read the value from a potentiometer and if the value was over a certain range – turn on the LED. In this code, we are going to read the value from...
PIC10F322 XC8 Analog-to-Digital Converter (ADC) Getting Started
The PIC10F322 Analog-to-Digital Converter has three selectable external analog channels. This allows you to convert an analog signal (voltage) to an 8bit value (0 – 255) that you can use – to do whatever you dream up. Here is the process that enables the ADC on Port.A1 and reads a value. Configure Port: Disable pin...
PIC10F322 XC8 Interrupt Based Delay Timer
In the previous post I wrote about using the PIC10F322 Interrupt. In this post is the the complete code that will use timer0, to replace the __delay_ms() macro. Why would we want to replace the __delay_ms() macro? The macro has some limitations, great if you want to bang something out. However, the macro uses a...
PIC10F322 XC8 Interrupts – Overview
Here is a quick overview of how to get interrupts going in XC8. You will need to define your interrupt function or handler in your code. void __interrupt () isr_routine (void) { } The name isr_routine can be anything you want, however __interrupt () is very important it tells XC8 that this function should be assigned...
PIC10F322 Applications – Cascaded Timer
PIC10F322 Cascaded Timer – when input on PORT.A2 goes low – PORT.A0 will go high, for 1 second, then LOW, Then PORT.A1 will go high, for one second, then LOW. The on time can be changed by adjusting the PulseOut_Time. Of course you can move the input to PORT.A3 and get one more output on PORTA.2 and make it three...
Understanding XC8 MPLAB C Header Files
Received a question about – How to separate a program into multiple files. Simple programs can be put in a single file, but when your program grows larger, while it isn’t impossible to keep it all in one file, it starts to become a big pain in the rear. The purpose of this post is to show you how to move functions...
PIC10F322 Applications – Basic Astable Using NCO (Numerically Controlled Oscillator)
The last post we wrote some code to get an Astable output on the PIC10F322. However the PIC10F322 has a NCO – (Numerically Controlled Oscillator). What this does – and without too much hair pulling – you can get an astable output on PORT.A2 up to 500khz using the internal clock. How the NCO works. The NCO is composed...
PIC10F322 Applications – Basic Astable
Continuing with using a PIC10F322 as a 555 replacement – Here is a basic Astable XC code. The output pulses are on PORT.A0 Run down of the code We do some basic setup to get output on Port.A0, Set the speed of the cpu to 16Mhz. The code loop, toggles PORT.A0 on and off. At 16Mhz and no delays, the output pulse is...
PIC10F322 -XC8 – Timer0 Module
The PIC10F322 has two Timer Modules – we are going to take a look at TMR0 (Timer 0). Timer 0 – is an 8bit timer/counter – that can be incremented by either an external signal or internal instruction clock FOSC/4. When the timer overflows – (reaches 0xFF and turns over to 0x00) it sets an interrupt flag that can be...
PIC10F322 Applications Basic Monostable Circuit 555 Replacement
A PIC10F322 as a 555 timer replacement – why not. I always pulled my hair out when working with most 555 timer circuits. Resistors, capacitors figuring out the values you need, then not having the values.. etc. Can be time consuming – why not just program a PIC10F322 it to do what you need? About The Code This is a...
PIC10F322- XC8 Code – PWM Functions
The PIC10F322 has two PWM modules. The period or frequency of the PWM output is common to all PWM modules, whereas the duty cycle is independently controlled. The two pins where the PWM output is present are: PORT A0 PWM1PORT A1 PWM2 During setup – make sure to set the associated TRIS register and disable analog for...
PIC10F322 – XC8 Code – Trigger Activated Dual Alternating Flasher – Model Train Level Crossing Lights
In a previous post – we built a dual alternating flasher. Power was supplied to the circuit and the lights flashed back and forth. This is a slight modification to the original circuit – when power is supplied the circuit doesn’t do anything until the input pin A3 is taken low. Then the lights will alternate until...
PIC10F322- XC8 Code – Input or Button Debounce
XC8 Code for PIC10F320 – PIC10F322 – Input or Button Debounce I put together some code to debounce a signal on the inputs of the PIC10F32X device. Switch debouncing is one of those things you generally have to live with when playing with switches and digital circuits. If you want to input a manual switch signal into...