Raspberry-Pi on Time Friend

Raspberry Auto Time Calibration

Fri, 20 Jan 2017 22:30:05 +0000

Should be Raspberry Pi system version issue, many methods online to enable Network Time Protocol (auto time calibration) have failed. For a beginner like me, tried many methods, none succeeded.

Today let’s talk about the correct way to enable;

Raspberry Pi doesn’t enable auto time calibration by default. Need to enable NTP (Network Time Protocol) to ensure time accuracy as much as possible.

Enable NTP:

sudo timedatectl set-ntp true

Next let’s see if time is correct:

Raspberry Startup pm2

Thu, 12 Jan 2017 20:32:05 +0000

My Raspberry Pi journey can be described as bumpy, researched for over ten hours before installing Node.js.

Next wanted to do startup pm2, struggled for another ten hours. Methods online because couldn’t keep up with version iterations updated, causing various failures.

Next, introduce method to make pm2 startup on Raspberry Pi

First download pm2

cnpm install pm2 -g

Run code that needs to run

pm2 start app.js

Save pm2 running state at this time, so after startup, pm2 can rerun app.js

Raspberry Install Node.js

Wed, 11 Jan 2017 22:30:05 +0000

My installed Raspberry Pi system comes with Node.js, but version is very low. And no npm. To install new version nodejs, I struggled for over ten hours, various methods online failed.

Finally installed successfully, next I’ll introduce my installation method.

Download Node.js

Node.js Download Page

We choose Linux Binaries (ARM) ARMv7 version, copy download link

wget https://nodejs.org/dist/v6.9.5/node-v6.9.5-linux-armv7l.tar.xz
tar -xzf node-v6.9.5-linux-armv7l.tar.xz // Extract installation package
sudo mv node-v6.9.5-linux-armv7l /usr/local/bin/node/
sudo ln /usr/local/bin/node/bin/node /usr/local/bin/node
sudo ln -s /usr/local/bin/node/lib/node_modules/npm/bin/npm /usr/local/bin/npm

Alright, at this time we enter in any directory:

Raspberry External Network Access

Tue, 10 Jan 2017 20:53:05 +0000

I want to operate my home Raspberry Pi when at company. But home ip address is dynamic, what should I do?

After various online searches, using router port forwarding or DMZ, can achieve external network access to internal network.

But after I set it up, didn’t succeed. Struggled for a long time, didn’t find the reason. Finally ended in failure. (I suspect I bought a fake router).

After trying various solutions, using Peanut Shell can achieve external network access to internal network, Peanut Shell’s term is:

Raspberry Operate via SSH

Tue, 10 Jan 2017 17:53:05 +0000

After various searches, various struggles, finally installed operating system for my little Raspberry Pi. But, this PIXEL OS graphical interface, various inexplicable bugs that won’t respond. After struggling for several hours, made me very frustrated.

Because just started with Linux, many problems need online searches, switching back and forth between PC and Raspberry Pi is really uncomfortable.

Below introduces method to control Raspberry Pi via SSH from another computer. To solve the above frustrating problems.

Raspberry System Installation

Tue, 10 Jan 2017 12:43:05 +0000

New Year passed, Taobao merchants finally started working and shipping. Before New Year, wanted to buy a Raspberry Pi to play with. But my luck was bad, merchants were already preparing to go home for New Year.

Yesterday ordered on Taobao. Got it today. I bought Raspberry-Pi3 Modle B.

Raspberry Pi doesn’t come with hard drive, so if you want to install system, need to prepare TF card or USB drive yourself.