Engineering and technology notes
Case’s magnets interfering with drawing precision with S-Pen : r/GalaxyTab
Case's magnets interfering with drawing precision with S-Pen
byu/Ok_Seaworthiness9393 inGalaxyTab
WebSockets on nginx
location /api/websocket {
proxy_pass ws://192.168.56.101:8123/api/websocket;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection “upgrade”;
}
location / {
proxy_pass http://192.168.56.101:8123/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection “upgrade”;
}
How to Setup DNS server using Bind9 on Ubuntu 16.04
Source: How to Setup DNS server using Bind9 on Ubuntu 16.04 – Alibaba Cloud Community
Sim7600 power-on
This is the code for the power-on of sim7600e:
/**************************Power on Sim7x00**************************/
void Sim7x00::PowerOn(int PowerKey = powerkey){
uint8_t answer = 0;
Serial.begin(9600);
// checks if the module is started
answer = sendATcommand("AT", "OK", 2000);
if (answer == 0)
{
Serial.print("Starting up...\n");
pinMode(PowerKey, OUTPUT);
// power on pulse
digitalWrite(PowerKey, HIGH);
delay(500);
digitalWrite(PowerKey, LOW);
// waits for an answer from the module
while (answer == 0) { // Send AT every two seconds and wait for the answer
answer = sendATcommand("AT", "OK", 2000);
delay(1000);
}
Source: Sim7600 and arduino won’t connect – Using Arduino / Project Guidance – Arduino Forum
Hisense TV Horizontal Lines on Screen: Fix in Minutes
https://www.lapseoftheshutter.com/hisense-tv-horizontal-lines-on-screen/
Hisense TV Horizontal Lines on Screen: Fix in Minutes
https://www.lapseoftheshutter.com/hisense-tv-horizontal-lines-on-screen/
Making PCB’s With an Easy UV-methode : 9 Steps
Source: Making PCB’s With an Easy UV-methode : 9 Steps – Instructables
How to make soldermask on PCBs for soldering?
Source: How to make soldermask on PCBs for soldering? – Electrical Engineering Stack Exchange
upgrade – ESM 401 Unauthorized error on Ubuntu 18.04
deb http://archive.ubuntu.com/ubuntu/ bionic-backports main universe multiverse restricted
deb http://archive.ubuntu.com/ubuntu/ bionic main universe multiverse restricted
deb http://archive.ubuntu.com/ubuntu/ bionic-updates main universe multiverse restricted
deb http://security.ubuntu.com/ubuntu/ bionic-security main universe multiverse restricted
Source: upgrade – ESM 401 Unauthorized error on Ubuntu 16.04 – Ask Ubuntu