| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>24bit 16bit color converter</title> | |
| <script> | |
| window.addEventListener('load', function() | |
| { | |
| let i24 = document.getElementById('in24'); | |
| let i16 = document.getElementById('in16'); |
| char IP[] = "xxx.xxx.xxx.xxx"; // buffer | |
| IPAddress ip = WiFi.localIP(); | |
| ip.toString().toCharArray(IP, 16); | |
| paint.DrawStringAt(0, 0, IP, &Font12, COLORED); | |
| epd.SetPartialWindowBlack(paint.GetImage(), 0, 20, paint.GetWidth(), paint.GetHeight()); | |
| epd.DisplayFrame(); |
| // An usage of AWS.IotData in Lambdas | |
| // | |
| // This example assumes some things | |
| // 1. That you have a environment variable AWS_IOT_ENDPOINT. This is the url that you can find in AWS IoT dashboard settings | |
| // 2. The lambda and your aws iot devices are on the same account and region | |
| const AWS = require('aws-sdk'); | |
| const iotData = new AWS.IotData({ endpoint: process.env.AWS_IOT_ENDPOINT }); | |
| const handler = (event, context) => { |
| #include "Nextion.h" | |
| const int lightPin = 0; | |
| const int hardwareCounterPin = 5; | |
| const int samplePeriod = 1000; //in milliseconds | |
| const float pulsesPerMile = 4000; | |
| const float convertMph = pulsesPerMile/3600; | |
| unsigned int count; | |
| float mph; |
Original post : https://unix.stackexchange.com/a/310699
nmcli con add type wifi ifname wlan0 con-name Hostspot autoconnect yes ssid Hostspot
nmcli con modify Hostspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
nmcli con modify Hostspot wifi-sec.key-mgmt wpa-psk
nmcli con modify Hostspot wifi-sec.psk "veryveryhardpassword1234"
On low memory devices like the arduino and esp8266 you do not want strings to be stored in RAM. This occurs by default on these systems. Declare a string const char * xyz = "this is a string" and it will use up RAM.
The solution on these devices is to allow strings to be stored in read only memory, in Arduino this is the PROGMEM macro. Most of my experience is with the ESP8266 which is a 32bit micros controller. This device stores PROGMEM data in flash. The macro PROGMEM on ESP8266 is simply
#define PROGMEM ICACHE_RODATA_ATTR
| # This guide will show you how to configure ddclient to dynamically update your DNS at Cloudflare. | |
| # This cookbook makes use of a number of online guides - all of which I will reference at the end. | |
| # Cloudflare requires ddclient to be version 3.8.2 or you will get a 'cloudflare protocol didn't exist'. | |
| # Unfortunately, the package manager at this time makes use of 3.8.1 | |
| # My suggestion is to follow the semi-autonomous process, by downloading the out of date package | |
| # and then manually update a few files. If you prefer, you can go down the fully manual route manual route. | |
| # Installation - Manual (Not Tested: https://www.cloudflare.com/technical-resources/#ddclient) | |
| # Installation - Semi-Autonomous (Recommended, follow below) |
| [program:test] | |
| command=/usr/bin/python /home/ubuntu/test.py | |
| directory=/home/ubuntu | |
| autostart=true | |
| autorestart=true | |
| startretries=3 | |
| stderr_logfile=/home/ubuntu/test.err.log | |
| stdout_logfile=/home/ubuntu/test.out.log | |
| user=ubuntu |
Inspired from https://blog.petrzemek.net/2014/03/23/restarting-a-python-script-within-itself/
def restart():
import sys
print("argv was",sys.argv)
print("sys.executable was", sys.executable)
print("restart now")
import os